/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32l1xx_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32l1xx.c file
*/
/* Initialize the LCD */
STM32L152D_LCD_Init();
/* Clear the LCD */
LCD_Clear(LCD_COLOR_WHITE);
/* I2C configuration ---------------------------------------------------------*/
I2C_Config();
/* Initialize LEDs mounted on STM32L152D-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* SysTick configuration -----------------------------------------------------*/
SysTickConfig();
/* Enable AES AHB clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_AES, ENABLE);
/*************************************Master Code******************************/
#if defined (I2C_MASTER)
/* I2C De-initialize */
I2C_DeInit(I2Cx);
/* AES Encryption ------------------------------------------------------------*/
AES_ECB_Encrypt(EncryptionKey, TxBuffer, AES_TEXT_SIZE, CipherText);
/* Read the CipherText and check content correctness */
if (Buffercmp(ExpectedCipherText, CipherText, RXBUFFERSIZE) == PASSED)
{
/* Clear the LCD */
LCD_Clear(LCD_COLOR_WHITE);
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_BLUE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_GREEN);
LCD_DisplayStringLine(LCD_LINE_1, "Encryption : Success");
}
else
{
LCD_Clear(LCD_COLOR_WHITE);
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_BLUE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_GREEN);
LCD_DisplayStringLine(LCD_LINE_1, "Encryption : Failed");
}
/*!< I2C Struct Initialize */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = 0xA0;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
/*!< I2C Initialize */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Enable Error Interrupt */
I2C_ITConfig(I2Cx, I2C_IT_ERR , ENABLE);
/* I2C ENABLE */
I2C_Cmd(I2Cx, ENABLE);
/* Master Transmitter---------------------------------------------------------*/
NumberOfByteToTransmit = TXBUFFERSIZE;
MasterMode = MASTER_MODE_TRANSMITTER;
Tx_Idx = 0x00;
/* Enable Error and Buffer Interrupts */
I2C_ITConfig(I2Cx, (I2C_IT_EVT | I2C_IT_BUF), ENABLE);
/* Generate the Start condition */
I2C_GenerateSTART(I2Cx, ENABLE);
/* Data transfer is performed in the I2C interrupt routine */
/* Wait until end of data transfer or time out */
TimeOut = USER_TIMEOUT;
while ((Tx_Idx < TXBUFFERSIZE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
TimeOut = USER_TIMEOUT;
while ((I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
LCD_DisplayStringLine(LCD_LINE_2, " Send : Done ");
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
#endif /* I2C_MASTER */
/**********************************Slave Code**********************************/
#if defined (I2C_SLAVE)
I2C_DeInit(I2Cx);
/* Initialize I2C peripheral */
/*!< I2C Init */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = SLAVE_ADDRESS;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Enable Error Interrupt */
I2C_ITConfig(I2Cx, (I2C_IT_ERR | I2C_IT_EVT | I2C_IT_BUF), ENABLE);
/* I2C ENABLE */
I2C_Cmd(I2Cx, ENABLE);
/* Slave Receiver-------------------------------------------------------------*/
Rx_Idx = 0x00;
Tx_Idx = 0x00;
/* Clear the RxBuffer */
Fill_Buffer(RxBuffer, RXBUFFERSIZE);
/* Wait until end of data transfer */
while (Rx_Idx < RXBUFFERSIZE)
{}
TimeOut = USER_TIMEOUT;
while ((I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
if (Buffercmp(ExpectedCipherText, RxBuffer, RXBUFFERSIZE) == PASSED)
{
/* Clear the LCD */
LCD_Clear(LCD_COLOR_WHITE);
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_BLUE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_GREEN);
LCD_DisplayStringLine(LCD_LINE_1, " Received : Done ");
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
else
{
/* Clear the LCD */
LCD_Clear(LCD_COLOR_WHITE);
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_BLUE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_GREEN);
LCD_DisplayStringLine(LCD_LINE_1, " Receive : Failed ");
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
/* AES Decription ------------------------------------------------------------*/
AES_ECB_Decrypt(EncryptionKey, RxBuffer, AES_TEXT_SIZE, ComputedPlainText);
/* Read the ComputedPlainText and check content correctness */
if (Buffercmp(TxBuffer, ComputedPlainText, RXBUFFERSIZE) == PASSED)
{
/* LED2, LED3 and LED4 Toggle */
LCD_DisplayStringLine(LCD_LINE_2, "Decryption : Success");
}
else
{
/* ED2, LED3 and LED4 On */
LCD_DisplayStringLine(LCD_LINE_2, " Decryption : Failed");
}
/* -------------------------------------------------------------------------- */
#endif /* I2C_SLAVE */
while(1)
{}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
/* SPI configuration ------------------------------------------------------*/
SPI_Config();
/* SysTick configuration ---------------------------------------------------*/
SysTickConfig();
/* Initialize LEDs mounted on STM320518-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* Master board configuration ------------------------------------------------*/
#ifdef SPI_MASTER
/* Initialize push-buttons mounted on STM320518-EVAL board */
STM_EVAL_PBInit(BUTTON_RIGHT, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_LEFT, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_UP, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_DOWN, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_SEL, BUTTON_MODE_GPIO);
/* Initializes the SPI communication */
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_Init(SPIx, &SPI_InitStructure);
/* Initialize the FIFO threshold */
SPI_RxFIFOThresholdConfig(SPIx, SPI_RxFIFOThreshold_QF);
/* TIM configuration ------------------------------------------------------*/
TIM_Config();
/* Enable the SPI peripheral */
SPI_Cmd(SPIx, ENABLE);
/* Enable NSS output for master mode */
SPI_SSOutputCmd(SPIx, ENABLE);
/* TIM Capture Compare DMA Request enable */
TIM_DMACmd(TIMx, TIMx_DMA_CHANNEL, ENABLE);
while (1)
{
/* DMA channel Rx of SPI Configuration */
DMA_InitStructure.DMA_BufferSize = (uint16_t)1;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &CommandReceived;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_Init(SPIx_RX_DMA_CHANNEL, &DMA_InitStructure);
/* DMA TIM trigger channel Configuration */
DMA_InitStructure.DMA_BufferSize = (uint16_t)1;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &CommandTransmitted;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(TIMx_CHANNEL_DMA_CHANNEL, &DMA_InitStructure);
/* Enable the SPI Rx DMA request */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, ENABLE);
CommandTransmitted = 0x00;
CommandReceived = 0x00;
/* Clear the RxBuffer */
Fill_Buffer(RxBuffer, TXBUFFERSIZE);
PressedButton = Read_Joystick();
while (PressedButton == JOY_NONE)
{
PressedButton = Read_Joystick();
}
switch (PressedButton)
{
/* JOY_RIGHT button pressed */
case JOY_RIGHT:
CommandTransmitted = CMD_RIGHT;
NumberOfByte = CMD_RIGHT_SIZE;
break;
/* JOY_LEFT button pressed */
case JOY_LEFT:
CommandTransmitted = CMD_LEFT;
NumberOfByte = CMD_LEFT_SIZE;
break;
/* JOY_UP button pressed */
case JOY_UP:
CommandTransmitted = CMD_UP;
NumberOfByte = CMD_UP_SIZE;
break;
/* JOY_DOWN button pressed */
case JOY_DOWN:
CommandTransmitted = CMD_DOWN;
NumberOfByte = CMD_DOWN_SIZE;
break;
/* JOY_SEL button pressed */
case JOY_SEL:
CommandTransmitted = CMD_SEL;
NumberOfByte = CMD_SEL_SIZE;
break;
default:
break;
}
/* Enable the DMA channel */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, ENABLE);
/* Enable DMA1 TIM Trigger Channel */
DMA_Cmd(TIMx_CHANNEL_DMA_CHANNEL, ENABLE);
/* TIM enable counter */
TIM_Cmd(TIMx, ENABLE);
/* Wait the SPI DMA Rx transfer complete or time out*/
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(SPIx_RX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The BSY flag can be monitored to ensure that the SPI communication is complete.
This is required to avoid corrupting the last transmission before disabling
the SPI or entering the Stop mode. The software must first wait until TXE=1
and then until BSY=0.*/
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_BSY) == SET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA1 global flags*/
DMA_ClearFlag(TIMx_CHANNEL_DMA_FLAG_GL);
DMA_ClearFlag(SPIx_RX_DMA_FLAG_GL);
/* disable the DMA channels */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, DISABLE);
DMA_Cmd(TIMx_CHANNEL_DMA_CHANNEL, DISABLE);
/* disable the SPI Rx DMA request */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, DISABLE);
/* TIM disable counter */
TIM_Cmd(TIMx, DISABLE);
if (CommandReceived == CMD_ACK)
{
/* DMA channel Rx of SPI Configuration */
DMA_InitStructure.DMA_BufferSize = (uint16_t)NumberOfByte;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_Init(SPIx_RX_DMA_CHANNEL, &DMA_InitStructure);
/* DMA channel Tx of SPI Configuration */
DMA_InitStructure.DMA_BufferSize = (uint16_t)NumberOfByte;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(TIMx_CHANNEL_DMA_CHANNEL, &DMA_InitStructure);
/* Enable the SPI Rx DMA request */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, ENABLE);
/* Enable the DMA channel */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, ENABLE);
/* Enable DMA1 TIM Trigger Channel */
DMA_Cmd(TIMx_CHANNEL_DMA_CHANNEL, ENABLE);
/* TIM enable counter */
TIM_Cmd(TIMx, ENABLE);
/* Wait the SPI Rx DMA transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(SPIx_RX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The BSY flag can be monitored to ensure that the SPI communication is complete.
This is required to avoid corrupting the last transmission before disabling
the SPI or entering the Stop mode. The software must first wait until TXE=1
and then until BSY=0.*/
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_BSY) == SET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA1 global flags */
DMA_ClearFlag(TIMx_CHANNEL_DMA_FLAG_GL);
DMA_ClearFlag(SPIx_RX_DMA_FLAG_GL);
/* Disable the DMA channels */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, DISABLE);
DMA_Cmd(TIMx_CHANNEL_DMA_CHANNEL, DISABLE);
/* Disable the SPI Rx and Tx DMA requests */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, DISABLE);
/* TIM disable counter */
TIM_Cmd(TIMx, DISABLE);
switch (NumberOfByte)
{
/* CMD_RIGHT command received */
case CMD_RIGHT_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE, SPI_DATAMASK) != FAILED) && (CommandReceived == CMD_ACK))
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED4 */
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_LEFT command received */
case CMD_LEFT_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE, SPI_DATAMASK) != FAILED) && (CommandReceived == CMD_ACK))
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn OFF LED2 and LED3 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* CMD_UP command received */
case CMD_UP_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE, SPI_DATAMASK) != FAILED) && (CommandReceived == CMD_ACK))
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn OFF LED3 and LED4 */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_DOWN command received */
case CMD_DOWN_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE, SPI_DATAMASK) != FAILED) && (CommandReceived == CMD_ACK))
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED2 and LED4 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_SEL command received */
case CMD_SEL_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE, SPI_DATAMASK) != FAILED) && (CommandReceived == CMD_ACK))
{
/* Turn ON LED2, LED3 and LED4 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
}
}
#endif /* SPI_MASTER */
/* Slave board configuration -----------------------------------------------*/
#ifdef SPI_SLAVE
/* Initializes the SPI communication */
SPI_I2S_DeInit(SPIx);
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_Init(SPIx, &SPI_InitStructure);
/* Initialize the FIFO threshold */
SPI_RxFIFOThresholdConfig(SPIx, SPI_RxFIFOThreshold_QF);
CommandTransmitted = CMD_ACK;
/* Infinite Loop */
while (1)
{
/* DMA channel Rx of SPI Configuration */
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &CommandReceived;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_Init(SPIx_RX_DMA_CHANNEL, &DMA_InitStructure);
/* DMA channel Tx of SPI Configuration */
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &CommandTransmitted;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(SPIx_TX_DMA_CHANNEL, &DMA_InitStructure);
/* Enable the SPI Rx and Tx DMA requests */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, ENABLE);
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Tx, ENABLE);
/* Enable the SPI peripheral */
SPI_Cmd(SPIx, ENABLE);
CommandReceived = 0x00;
/* Enable the DMA channels */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, ENABLE);
DMA_Cmd(SPIx_TX_DMA_CHANNEL, ENABLE);
/* Wait the SPI DMA transfers complete or time out */
while (DMA_GetFlagStatus(SPIx_RX_DMA_FLAG_TC) == RESET)
{}
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(SPIx_TX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The BSY flag can be monitored to ensure that the SPI communication is complete.
This is required to avoid corrupting the last transmission before disabling
the SPI or entering the Stop mode. The software must first wait until TXE=1
and then until BSY=0.*/
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_BSY) == SET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA1 global flags */
DMA_ClearFlag(SPIx_TX_DMA_FLAG_GL);
DMA_ClearFlag(SPIx_RX_DMA_FLAG_GL);
/* Disable the DMA channels */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, DISABLE);
DMA_Cmd(SPIx_TX_DMA_CHANNEL, DISABLE);
/* Disable the SPI peripheral */
SPI_Cmd(SPIx, DISABLE);
/* Disable the SPI Rx and Tx DMA requests */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, DISABLE);
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Tx, DISABLE);
switch (CommandReceived)
{
/* CMD_RIGHT command received */
case CMD_RIGHT:
NumberOfByte = CMD_RIGHT_SIZE;
break;
/* CMD_LEFT command received */
case CMD_LEFT:
NumberOfByte = CMD_LEFT_SIZE;
break;
/* CMD_UP command received */
case CMD_UP:
NumberOfByte = CMD_UP_SIZE;
break;
/* CMD_DOWN command received */
case CMD_DOWN:
NumberOfByte = CMD_DOWN_SIZE;
break;
/* CMD_SEL command received */
case CMD_SEL:
NumberOfByte = CMD_SEL_SIZE;
break;
default:
break;
}
/* DMA channel Rx of SPI Configuration */
DMA_InitStructure.DMA_BufferSize = NumberOfByte;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_Init(SPIx_RX_DMA_CHANNEL, &DMA_InitStructure);
/* DMA channel Tx of SPI Configuration */
DMA_InitStructure.DMA_BufferSize = NumberOfByte;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPIx_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(SPIx_TX_DMA_CHANNEL, &DMA_InitStructure);
/* Enable the SPI Rx and Tx DMA requests */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, ENABLE);
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Tx, ENABLE);
/* Enable the SPI peripheral */
SPI_Cmd(SPIx, ENABLE);
/* Enable the DMA channels */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, ENABLE);
DMA_Cmd(SPIx_TX_DMA_CHANNEL, ENABLE);
/* Wait the SPI DMA transfers complete or time out */
while (DMA_GetFlagStatus(SPIx_RX_DMA_FLAG_TC) == RESET)
{}
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(SPIx_TX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The BSY flag can be monitored to ensure that the SPI communication is complete.
This is required to avoid corrupting the last transmission before disabling
the SPI or entering the Stop mode. The software must first wait until TXE=1
and then until BSY=0.*/
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
TimeOut = USER_TIMEOUT;
while ((SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_BSY) == SET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
switch (NumberOfByte)
{
/* CMD_RIGHT command received */
case CMD_RIGHT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE, SPI_DATAMASK) != FAILED)
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED4 */
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_LEFT command received */
case CMD_LEFT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE, SPI_DATAMASK) != FAILED)
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn OFF LED2 and LED3 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* CMD_UP command received */
case CMD_UP_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE, SPI_DATAMASK) != FAILED)
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn OFF LED3 and LED4 */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_DOWN command received */
case CMD_DOWN_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE, SPI_DATAMASK) != FAILED)
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED2 and LED4 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_SEL command received */
case CMD_SEL_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE, SPI_DATAMASK) != FAILED)
{
/* Turn ON LED2, LED3 and LED4 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
/* Clear DMA1 global flags */
DMA_ClearFlag(SPIx_TX_DMA_FLAG_GL);
DMA_ClearFlag(SPIx_RX_DMA_FLAG_GL);
/* Disable the DMA channels */
DMA_Cmd(SPIx_RX_DMA_CHANNEL, DISABLE);
DMA_Cmd(SPIx_TX_DMA_CHANNEL, DISABLE);
/* Disable the SPI peripheral */
SPI_Cmd(SPIx, DISABLE);
/* Disable the SPI Rx and Tx DMA requests */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, DISABLE);
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Tx, DISABLE);
}
#endif /* SPI_SLAVE */
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f4xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f4xx.c file
*/
/* USART configuration -----------------------------------------------------*/
USART_Config();
/* SysTick configuration ---------------------------------------------------*/
SysTickConfig();
/* LEDs configuration ------------------------------------------------------*/
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* IO Expanderconfiguration ------------------------------------------------*/
#ifdef USART_TRANSMITTER_MODE
TimeOut = USER_TIMEOUT;
while ((IOE_Config() != IOE_OK) && (TimeOut != 0))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
#endif /* USART_TRANSMITTER_MODE */
while (1)
{
/******************************************************************************/
/* USART in Transmitter Mode */
/******************************************************************************/
#ifdef USART_TRANSMITTER_MODE
/* Clear Buffers */
Fill_Buffer(CmdBuffer, 2);
DMA_DeInit(USARTx_TX_DMA_STREAM);
DMA_InitStructure.DMA_Channel = USARTx_TX_DMA_CHANNEL;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
/****************** USART will Transmit Specific Command ******************/
/* Prepare the DMA to transfer the transaction command (2bytes) from the
memory to the USART */
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)CmdBuffer;
DMA_InitStructure.DMA_BufferSize = (uint16_t)2;
DMA_Init(USARTx_TX_DMA_STREAM, &DMA_InitStructure);
/* Prepare Command to be transmitted */
/* Waiting joystick pressed */
PressedButton = JOY_NONE;
while (PressedButton == JOY_NONE)
{
PressedButton = IOE_JoyStickGetState();
}
/* Waiting joystick released */
ReleasedButton = IOE_JoyStickGetState();
while ((PressedButton == ReleasedButton) && (ReleasedButton != JOY_NONE))
{
ReleasedButton = IOE_JoyStickGetState();
}
if(PressedButton != JOY_NONE)
{
/* For each joystick state correspond a command to be sent through USART */
switch (PressedButton)
{
/* JOY_RIGHT button pressed */
case JOY_RIGHT:
CmdBuffer[0] = CMD_RIGHT;
CmdBuffer[1] = CMD_RIGHT_SIZE;
break;
/* JOY_LEFT button pressed */
case JOY_LEFT:
CmdBuffer[0] = CMD_LEFT;
CmdBuffer[1] = CMD_LEFT_SIZE;
break;
/* JOY_UP button pressed */
case JOY_UP:
CmdBuffer[0] = CMD_UP;
CmdBuffer[1] = CMD_UP_SIZE;
break;
/* JOY_DOWN button pressed */
case JOY_DOWN:
CmdBuffer[0] = CMD_DOWN;
CmdBuffer[1] = CMD_DOWN_SIZE;
break;
/* JOY_SEL button pressed */
case JOY_SEL:
CmdBuffer[0] = CMD_SEL;
CmdBuffer[1] = CMD_SEL_SIZE;
break;
default:
break;
}
/* Enable the USART DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Tx, ENABLE);
/* Clear the TC bit in the SR register by writing 0 to it */
USART_ClearFlag(USARTx, USART_FLAG_TC);
/* Enable the DMA TX Stream, USART will start sending the command code (2bytes) */
DMA_Cmd(USARTx_TX_DMA_STREAM, ENABLE);
/* Wait the USART DMA Tx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_TX_DMA_STREAM, USARTx_TX_DMA_FLAG_TCIF) == RESET)&&(TimeOut != 0))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission*/
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA Streams flags */
DMA_ClearFlag(USARTx_TX_DMA_STREAM, USARTx_TX_DMA_FLAG_HTIF | USARTx_TX_DMA_FLAG_TCIF);
/* Disable the DMA Streams */
DMA_Cmd(USARTx_TX_DMA_STREAM, DISABLE);
/* Disable the USART Tx DMA request */
USART_DMACmd(USARTx, USART_DMAReq_Tx, DISABLE);
/******************* USART will Transmit Data Buffer ********************/
/* Prepare the DMA to transfer the transaction data (length defined by
CmdBuffer[1] variable) from the memory to the USART */
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)TxBuffer;
DMA_InitStructure.DMA_BufferSize = (uint16_t)CmdBuffer[1];
DMA_Init(USARTx_TX_DMA_STREAM, &DMA_InitStructure);
/* Enable the USART Tx DMA request */
USART_DMACmd(USARTx, USART_DMAReq_Tx, ENABLE);
/* Clear the TC bit in the SR register by writing 0 to it */
USART_ClearFlag(USARTx, USART_FLAG_TC);
/* Enable DMA USART Tx Stream */
DMA_Cmd(USARTx_TX_DMA_STREAM, ENABLE);
/* Wait the USART DMA Tx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_TX_DMA_STREAM, USARTx_TX_DMA_FLAG_TCIF) == RESET)&&(TimeOut != 0))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1, The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission */
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear all DMA Streams flags */
DMA_ClearFlag(USARTx_TX_DMA_STREAM, USARTx_TX_DMA_FLAG_HTIF | USARTx_TX_DMA_FLAG_TCIF);
/* Disable the DMA Stream */
DMA_Cmd(USARTx_TX_DMA_STREAM, DISABLE);
/* Disable the USART Tx DMA request */
USART_DMACmd(USARTx, USART_DMAReq_Tx, DISABLE);
}
#endif /* USART_TRANSMITTER_MODE */
/******************************************************************************/
/* USART in Receiver Mode */
/******************************************************************************/
#ifdef USART_RECEIVER_MODE
/* Clear Buffers */
Fill_Buffer(RxBuffer, TXBUFFERSIZE);
Fill_Buffer(CmdBuffer, 2);
DMA_DeInit(USARTx_RX_DMA_STREAM);
DMA_InitStructure.DMA_Channel = USARTx_RX_DMA_CHANNEL;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
/****************** USART will Receive Specific Command *******************/
/* Configure the DMA to receive 2 bytes (transaction command), in case of USART receiver */
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)CmdBuffer;
DMA_InitStructure.DMA_BufferSize = (uint16_t)2;
DMA_Init(USARTx_RX_DMA_STREAM, &DMA_InitStructure);
/* Enable the USART Rx DMA request */
USART_DMACmd(USARTx, USART_DMAReq_Rx, ENABLE);
/* Enable the DMA RX Stream */
DMA_Cmd(USARTx_RX_DMA_STREAM, ENABLE);
/* Wait the USART DMA Rx transfer complete (to receive the transaction command) */
while (DMA_GetFlagStatus(USARTx_RX_DMA_STREAM, USARTx_RX_DMA_FLAG_TCIF) == RESET)
{
}
/* Clear all DMA Streams flags */
DMA_ClearFlag(USARTx_RX_DMA_STREAM, USARTx_RX_DMA_FLAG_HTIF | USARTx_RX_DMA_FLAG_TCIF);
/* Disable the DMA Rx Stream */
DMA_Cmd(USARTx_RX_DMA_STREAM, DISABLE);
/* Disable the USART Rx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Rx, DISABLE);
/************* USART will receive the the transaction data ****************/
/* Transaction data (length defined by CmdBuffer[1] variable) */
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)RxBuffer;
DMA_InitStructure.DMA_BufferSize = (uint16_t)CmdBuffer[1];
DMA_Init(USARTx_RX_DMA_STREAM, &DMA_InitStructure);
/* Enable the USART Rx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Rx , ENABLE);
/* Enable the DMA Stream */
DMA_Cmd(USARTx_RX_DMA_STREAM, ENABLE);
/* Wait the USART DMA Rx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_RX_DMA_STREAM, USARTx_RX_DMA_FLAG_TCIF) == RESET)&&(TimeOut != 0))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear all DMA Streams flags */
DMA_ClearFlag(USARTx_RX_DMA_STREAM, USARTx_RX_DMA_FLAG_HTIF | USARTx_RX_DMA_FLAG_TCIF);
/* Disable the DMA Stream */
DMA_Cmd(USARTx_RX_DMA_STREAM, DISABLE);
/* Disable the USART Rx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Rx, DISABLE);
switch (CmdBuffer[1])
{
/* CMD_RIGHT command received */
case CMD_RIGHT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE) != FAILED)
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED4 */
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_LEFT command received */
case CMD_LEFT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE) != FAILED)
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn OFF LED2 and LED3 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* CMD_UP command received */
case CMD_UP_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE) != FAILED)
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn OFF LED3 and LED4 */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_DOWN command received */
case CMD_DOWN_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE) != FAILED)
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED2 and LED4 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_SEL command received */
case CMD_SEL_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE) != FAILED)
{
/* Turn ON all LED2, LED3 and LED4 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
#endif /* USART_RECEIVER_MODE */
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f2xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f2xx.c file
*/
/* I2C configuration ---------------------------------------------------------*/
I2C_Config();
/* Initialize LEDs mounted on STM322xG-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* SysTick configuration -----------------------------------------------------*/
SysTickConfig();
/* Clear the RxBuffer */
Fill_Buffer(RxBuffer, RXBUFFERSIZE);
/*************************************Master Code******************************/
#if defined (I2C_MASTER)
/* I2C Struct Initialize */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = 0xA0;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
/* I2C Initialize */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Master Transmitter --------------------------------------------------------*/
/* Generate the Start condition */
I2C_GenerateSTART(I2Cx, ENABLE);
#ifdef I2C_10BITS_ADDRESS
/* Test on I2C1 EV5 and clear it */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send Header to I2Cx for write or time out */
I2C_SendData(I2Cx, HEADER_ADDRESS_Write);
/* Test on I2Cx EV9 and clear it */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_ADDRESS10))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send I2Cx slave Address for write */
I2C_Send7bitAddress(I2Cx, (uint8_t)SLAVE_ADDRESS, I2C_Direction_Transmitter);
#else /* I2C_7BITS_ADDRESS */
/* Test on I2Cx EV5 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send I2Cx slave Address for write */
I2C_Send7bitAddress(I2Cx, SLAVE_ADDRESS, I2C_Direction_Transmitter);
#endif /* I2C_10BITS_ADDRESS */
/* Test on I2Cx EV6 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* I2Cx DMA Enable */
I2C_DMACmd(I2Cx, ENABLE);
/* Enable DMA TX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_TX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Wait until DMA Transfer Complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_TX,I2Cx_TX_DMA_TCFLAG) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* I2Cx DMA Disable */
I2C_DMACmd(I2Cx, DISABLE);
/* Wait until BTF Flag is set before generating STOP or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_GetFlagStatus(I2Cx,I2C_FLAG_BTF))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send I2Cx STOP Condition */
I2C_GenerateSTOP(I2Cx, ENABLE);
/* Disable DMA TX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_TX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear any pending flag on Tx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_TX, I2Cx_TX_DMA_TCFLAG | I2Cx_TX_DMA_FEIFLAG | I2Cx_TX_DMA_DMEIFLAG | \
I2Cx_TX_DMA_TEIFLAG | I2Cx_TX_DMA_HTIFLAG);
/* Master Receiver -----------------------------------------------------------*/
/* Enable DMA NACK automatic generation */
I2C_DMALastTransferCmd(I2Cx, ENABLE);
/* Send I2Cx START condition */
I2C_GenerateSTART(I2Cx, ENABLE);
#ifdef I2C_10BITS_ADDRESS
/* Test on EV5 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send Header to Slave for write */
I2C_SendData(I2Cx, HEADER_ADDRESS_Write);
/* Test on EV9 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_ADDRESS10))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send slave Address */
I2C_Send7bitAddress(I2Cx, (uint8_t)SLAVE_ADDRESS, I2C_Direction_Transmitter);
/* Test on I2Cx EV6 and clear it or time out*/
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Repeated Start */
I2C_GenerateSTART(I2Cx, ENABLE);
/* Test on EV5 and clear it or time out*/
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send Header to Slave for Read */
I2C_SendData(I2Cx, HEADER_ADDRESS_Read);
#else /* I2C_7BITS_ADDRESS */
/* Test on I2Cx EV5 and clear it or time out*/
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send I2Cx slave Address for write */
I2C_Send7bitAddress(I2Cx, SLAVE_ADDRESS, I2C_Direction_Receiver);
#endif /* I2C_10BITS_ADDRESS */
/* Test on I2Cx EV6 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* I2Cx DMA Enable */
I2C_DMACmd(I2Cx, ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_RX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_RX,I2Cx_RX_DMA_TCFLAG)==RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Send I2Cx STOP Condition */
I2C_GenerateSTOP(I2Cx, ENABLE);
/* Disable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_RX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable I2C DMA request */
I2C_DMACmd(I2Cx,DISABLE);
/* Clear any pending flag on Rx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_RX, I2Cx_RX_DMA_TCFLAG | I2Cx_RX_DMA_FEIFLAG | I2Cx_RX_DMA_DMEIFLAG | \
I2Cx_RX_DMA_TEIFLAG | I2Cx_RX_DMA_HTIFLAG);
if (Buffercmp(TxBuffer, RxBuffer, RXBUFFERSIZE) == PASSED)
{
/* LED2, LED3 and LED4 Toggle */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
else
{ /* ED2, LED3 and LED4 On */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
#endif /* I2C_MASTER */
/**********************************Slave Code**********************************/
#if defined (I2C_SLAVE)
/* Initialize I2C peripheral */
/* I2C Init */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = SLAVE_ADDRESS;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Slave Receiver ------------------------------------------------------------*/
/* Test on I2C EV1 and clear it */
while (!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED))
{}
/* I2Cx DMA Enable */
I2C_DMACmd(I2Cx, ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_RX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_RX,I2Cx_RX_DMA_TCFLAG)==RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Test on I2Cx EV4 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_STOP_DETECTED))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_RX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_RX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_RX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable I2C DMA request */
I2C_DMACmd(I2Cx,DISABLE);
/* Clear any pending flag on Rx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_RX, I2Cx_RX_DMA_TCFLAG | I2Cx_RX_DMA_FEIFLAG | I2Cx_RX_DMA_DMEIFLAG | \
I2Cx_RX_DMA_TEIFLAG | I2Cx_RX_DMA_HTIFLAG);
/* Slave Transmitter ---------------------------------------------------------*/
/* Test on I2C EV1 and clear it or time out*/
while (!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED))
{}
/* I2Cx DMA Enable */
I2C_DMACmd(I2Cx, ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, ENABLE);
/* Wait until I2Cx_DMA_STREAM_TX enabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= ENABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(I2Cx_DMA_STREAM_TX,I2Cx_TX_DMA_TCFLAG)==RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Test on I2Cx EV3-2 and clear it or time out */
TimeOut = USER_TIMEOUT;
while ((!I2C_CheckEvent(I2Cx, I2C_EVENT_SLAVE_ACK_FAILURE))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable DMA TX Channel */
DMA_Cmd(I2Cx_DMA_STREAM_TX, DISABLE);
/* Wait until I2Cx_DMA_STREAM_TX disabled or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetCmdStatus(I2Cx_DMA_STREAM_TX)!= DISABLE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Disable I2C DMA request */
I2C_DMACmd(I2Cx,DISABLE);
/* Clear any pending flag on Tx Stream */
DMA_ClearFlag(I2Cx_DMA_STREAM_TX, I2Cx_TX_DMA_TCFLAG | I2Cx_TX_DMA_FEIFLAG | I2Cx_TX_DMA_DMEIFLAG | \
I2Cx_TX_DMA_TEIFLAG | I2Cx_TX_DMA_HTIFLAG);
if (Buffercmp(TxBuffer, RxBuffer, RXBUFFERSIZE) == PASSED)
{
/* LED2, LED3 and LED4 are On */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
else
{ /* LED2, LED3 and LED4 are Off */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
#endif /* I2C_SLAVE */
while(1)
{}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32l1xx_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32l1xx.c file
*/
/* SPI configuration ------------------------------------------------------*/
SPI_Config();
/* SysTick configuration ---------------------------------------------------*/
SysTickConfig();
/* Initialize LEDs mounted on STM32L152-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* Master board configuration ------------------------------------------------*/
#ifdef SPI_MASTER
/* Initialize push-buttons mounted on STM32L152-EVAL board */
STM_EVAL_PBInit(BUTTON_RIGHT, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_LEFT, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_UP, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_DOWN, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_SEL, BUTTON_MODE_GPIO);
/* Initializes the SPI communication */
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_Init(SPIx, &SPI_InitStructure);
/* Enable the Rx buffer not empty interrupt */
SPI_I2S_ITConfig(SPIx, SPI_I2S_IT_RXNE, ENABLE);
/* Enable the SPI Error interrupt */
SPI_I2S_ITConfig(SPIx, SPI_I2S_IT_ERR, ENABLE);
/* Data transfer is performed in the SPI interrupt routine */
/* Enable the SPI peripheral */
SPI_Cmd(SPIx, ENABLE);
while (1)
{
CmdTransmitted = 0x00;
CmdReceived = 0x00;
CmdStatus = 0x00;
Tx_Idx = 0x00;
Rx_Idx = 0x00;
/* Clear the RxBuffer */
Fill_Buffer(RxBuffer, TXBUFFERSIZE);
PressedButton = Read_Joystick();
while (PressedButton == JOY_NONE)
{
PressedButton = Read_Joystick();
}
switch (PressedButton)
{
/* JOY_RIGHT button pressed */
case JOY_RIGHT:
CmdTransmitted = CMD_RIGHT;
NumberOfByte = CMD_RIGHT_SIZE;
break;
/* JOY_LEFT button pressed */
case JOY_LEFT:
CmdTransmitted = CMD_LEFT;
NumberOfByte = CMD_LEFT_SIZE;
break;
/* JOY_UP button pressed */
case JOY_UP:
CmdTransmitted = CMD_UP;
NumberOfByte = CMD_UP_SIZE;
break;
/* JOY_DOWN button pressed */
case JOY_DOWN:
CmdTransmitted = CMD_DOWN;
NumberOfByte = CMD_DOWN_SIZE;
break;
/* JOY_SEL button pressed */
case JOY_SEL:
CmdTransmitted = CMD_SEL;
NumberOfByte = CMD_SEL_SIZE;
break;
default:
break;
}
if (CmdTransmitted != 0x00)
{
/* Enable the Tx buffer empty interrupt */
SPI_I2S_ITConfig(SPIx, SPI_I2S_IT_TXE, ENABLE);
/* Wait until end of data transfer or time out*/
TimeOut = USER_TIMEOUT;
while ((Rx_Idx < GetVar_NbrOfData())&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
}
switch (Rx_Idx)
{
/* Right button pressed */
case CMD_RIGHT_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE) == PASSED) && (CmdReceived == CMD_ACK))
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED4);
}
break;
/* Left button pressed*/
case CMD_LEFT_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE) == PASSED) && (CmdReceived == CMD_ACK))
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* Up button pressed */
case CMD_UP_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE) == PASSED) && (CmdReceived == CMD_ACK))
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* Down button pressed */
case CMD_DOWN_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE) == PASSED) && (CmdReceived == CMD_ACK))
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* Sel button pressed */
case CMD_SEL_SIZE:
if ((Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE) == PASSED) && (CmdReceived == CMD_ACK))
{
/* Turn ON all LEDs */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
}
#endif /* SPI_MASTER */
/* Slave board configuration ----------------------------------------------*/
#ifdef SPI_SLAVE
/* Initializes the SPI communication */
SPI_I2S_DeInit(SPIx);
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_Init(SPIx, &SPI_InitStructure);
/* Enable the Rx buffer not empty interrupt */
SPI_I2S_ITConfig(SPIx, SPI_I2S_IT_RXNE, ENABLE);
/* Enable the SPI Error interrupt */
SPI_I2S_ITConfig(SPIx, SPI_I2S_IT_ERR, ENABLE);
/* Enable the SPI peripheral */
SPI_Cmd(SPIx, ENABLE);
/* Infinite Loop */
while (1)
{
CmdStatus = 0x00;
CmdReceived = 0x00;
Rx_Idx = 0x00;
Tx_Idx = 0x00;
/* Write the first data in SPI shift register before enabling the interrupt
this data will be transmitted when the Slave receive the generated clock
by the Master */
/* Enable the Tx buffer empty interrupt */
SPI_I2S_SendData(SPIx, CMD_ACK);
SPI_I2S_ITConfig(SPIx, SPI_I2S_IT_TXE, ENABLE);
/* Waiting Transaction code Byte */
while (CmdStatus == 0x00)
{}
switch (CmdReceived)
{
/* CMD_RIGHT command received or time out*/
case CMD_RIGHT:
TimeOut = USER_TIMEOUT;
while ((Rx_Idx < CMD_RIGHT_SIZE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
if (Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE) != FAILED)
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED4 */
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_LEFT command received or time out */
case CMD_LEFT:
TimeOut = USER_TIMEOUT;
while ((Rx_Idx < CMD_LEFT_SIZE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
if (Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE) != FAILED)
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn OFF LED2 and LED3 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* CMD_UP command received or time out*/
case CMD_UP:
TimeOut = USER_TIMEOUT;
while ((Rx_Idx < CMD_UP_SIZE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
if (Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE) != FAILED)
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn OFF LED3 and LED4 */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_DOWN command received or time out */
case CMD_DOWN:
TimeOut = USER_TIMEOUT;
while ((Rx_Idx < CMD_DOWN_SIZE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
if (Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE) != FAILED)
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED2 and LED4 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_SEL command received or time out */
case CMD_SEL:
TimeOut = USER_TIMEOUT;
while ((Rx_Idx < CMD_SEL_SIZE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
if (Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE) != FAILED)
{
/* Turn ON LED2, LED3 and LED4 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
/* Disable the Tx buffer empty interrupt */
SPI_I2S_ITConfig(SPIx, SPI_I2S_IT_TXE, DISABLE);
}
#endif /* SPI_SLAVE */
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f2xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f2xx.c file
*/
/* I2C configuration ---------------------------------------------------------*/
I2C_Config();
/* Initialize LEDs mounted on STM322xG-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
#if defined (I2C_MASTER)
/* Initialize push-buttons mounted on STM322xG-EVAL board */
TimeOut = USER_TIMEOUT;
while ((IOE_Config() != IOE_OK) && (TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
#endif /* I2C_MASTER */
/* SysTick configuration -----------------------------------------------------*/
SysTickConfig();
/*************************************Master Code******************************/
#if defined (I2C_MASTER)
/* I2C De-initialize */
I2C_DeInit(I2Cx);
/*!< I2C Struct Initialize */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = 0xA0;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
/*!< I2C Initialize */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Enable Error Interrupt */
I2C_ITConfig(I2Cx, I2C_IT_ERR , ENABLE);
/* I2C ENABLE */
I2C_Cmd(I2Cx, ENABLE);
while (1)
{
CmdTransmitted = 0x00;
NumberOfByte = 0x00;
Tx_Idx = 0x00;
/* Clear PressedButton by reading joystick */
PressedButton = IOE_JoyStickGetState();
/* Waiting joystick pressed */
while (PressedButton == JOY_NONE)
{
PressedButton = IOE_JoyStickGetState();
}
/* I2C in Master Transmitter Mode ----------------------------------------*/
switch (PressedButton)
{
/* JOY_RIGHT button pressed */
case JOY_RIGHT:
NumberOfByte = CMD_RIGHT_SIZE;
CmdTransmitted = CMD_RIGHT;
break;
/* JOY_LEFT button pressed */
case JOY_LEFT:
NumberOfByte = CMD_LEFT_SIZE;
CmdTransmitted = CMD_LEFT;
break;
/* JOY_UP button pressed */
case JOY_UP:
NumberOfByte = CMD_UP_SIZE;
CmdTransmitted = CMD_UP;
break;
/* JOY_DOWN button pressed */
case JOY_DOWN:
NumberOfByte = CMD_DOWN_SIZE;
CmdTransmitted = CMD_DOWN;
break;
/* JOY_SEL button pressed */
case JOY_SEL:
NumberOfByte = CMD_SEL_SIZE;
CmdTransmitted = CMD_SEL;
break;
default:
break;
}
if (CmdTransmitted != 0x00)
{
/* Enable Error and Buffer Interrupts */
I2C_ITConfig(I2Cx, (I2C_IT_EVT | I2C_IT_BUF), ENABLE);
/* Generate the Start condition */
I2C_GenerateSTART(I2Cx, ENABLE);
/* Data transfer is performed in the I2C interrupt routine */
/* Wait until end of data transfer or time out */
TimeOut = USER_TIMEOUT;
while ((Tx_Idx < GetVar_NbrOfDataToTransfer())&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
TimeOut = USER_TIMEOUT;
while ((I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY))&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
}
}
#endif /* I2C_MASTER */
/**********************************Slave Code**********************************/
#if defined (I2C_SLAVE)
I2C_DeInit(I2Cx);
/* Initialize I2C peripheral */
/*!< I2C Init */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = SLAVE_ADDRESS;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Enable Error Interrupt */
I2C_ITConfig(I2Cx, (I2C_IT_ERR | I2C_IT_EVT | I2C_IT_BUF), ENABLE);
/* I2C ENABLE */
I2C_Cmd(I2Cx, ENABLE);
/* Infinite Loop */
while (1)
{
CmdReceived = 0x00;
NumberOfByte = 0x00;
/* Clear the RxBuffer */
Fill_Buffer(RxBuffer, RXBUFFERSIZE);
while (CmdReceived == 0x00)
{}
/* Wait until end of data transfer */
while (Rx_Idx < GetVar_NbrOfDataToReceive())
{}
/* I2C in Slave Receiver Mode --------------------------------------------*/
if (CmdReceived != 0x00)
{
switch (Rx_Idx)
{
/* Right button pressed */
case CMD_RIGHT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE) == PASSED)
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED4);
}
break;
/* Left button pressed*/
case CMD_LEFT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE) == PASSED)
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* Up button pressed */
case CMD_UP_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE) == PASSED)
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* Down button pressed */
case CMD_DOWN_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE) == PASSED)
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn all other LEDs off */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* Sel button pressed */
case CMD_SEL_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE) == PASSED)
{
/* Turn ON all LEDs */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
}
}
#endif /* I2C_SLAVE */
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
/* USART configuration -----------------------------------------------------*/
USART_Config();
/* SysTick configuration ---------------------------------------------------*/
SysTickConfig();
/* Initialize LEDs mounted on EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* Initialize push-buttons mounted on EVAL board */
STM_EVAL_PBInit(BUTTON_RIGHT, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_LEFT, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_UP, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_DOWN, BUTTON_MODE_GPIO);
STM_EVAL_PBInit(BUTTON_SEL, BUTTON_MODE_GPIO);
while (1)
{
/* Clear Buffers */
Fill_Buffer(CmdBuffer, 0x02);
Fill_Buffer(AckBuffer, 0x02);
Fill_Buffer(RxBuffer, TXBUFFERSIZE);
/* Waiting transaction code in case of USART receiver */
/* DMA channel Rx of USART Configuration */
DMA_DeInit(USARTx_RX_DMA_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = USARTx_RDR_ADDRESS;
DMA_InitStructure.DMA_BufferSize = (uint16_t)2;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)CmdBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(USARTx_RX_DMA_CHANNEL, &DMA_InitStructure);
/* Enable the USART Rx DMA request */
USART_DMACmd(USARTx, USART_DMAReq_Rx, ENABLE);
/* Enable the DMA channel */
DMA_Cmd(USARTx_RX_DMA_CHANNEL, ENABLE);
PressedButton = Read_Joystick();
/* Waiting Joystick pressed in case to transmit data or received Transaction command */
while((PressedButton == JOY_NONE) && (CmdBuffer[0x00] == 0x00))
{
PressedButton = Read_Joystick();
}
/* USART in Mode Transmitter ---------------------------------------------*/
if ((PressedButton != JOY_NONE) && (CmdBuffer[0x00] == 0x00))
{
/* Configure the USART to receive the ACK command Table */
/* DMA channel Rx of USART Configuration */
DMA_DeInit(USARTx_RX_DMA_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = USARTx_RDR_ADDRESS;
DMA_InitStructure.DMA_BufferSize = (uint16_t)2;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)AckBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(USARTx_RX_DMA_CHANNEL, &DMA_InitStructure);
/* Configure the USART to send the command table */
/* DMA channel Tx of USART Configuration */
DMA_DeInit(USARTx_TX_DMA_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = USARTx_TDR_ADDRESS;
DMA_InitStructure.DMA_BufferSize = (uint16_t)2;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)CmdBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_Init(USARTx_TX_DMA_CHANNEL, &DMA_InitStructure);
switch (PressedButton)
{
/* JOY_RIGHT button pressed */
case JOY_RIGHT:
CmdBuffer[0x00] = CMD_RIGHT;
CmdBuffer[0x01] = CMD_RIGHT_SIZE;
break;
/* JOY_LEFT button pressed */
case JOY_LEFT:
CmdBuffer[0x00] = CMD_LEFT;
CmdBuffer[0x01] = CMD_LEFT_SIZE;
break;
/* JOY_UP button pressed */
case JOY_UP:
CmdBuffer[0x00] = CMD_UP;
CmdBuffer[0x01] = CMD_UP_SIZE;
break;
/* JOY_DOWN button pressed */
case JOY_DOWN:
CmdBuffer[0x00] = CMD_DOWN;
CmdBuffer[0x01] = CMD_DOWN_SIZE;
break;
/* JOY_SEL button pressed */
case JOY_SEL:
CmdBuffer[0x00] = CMD_SEL;
CmdBuffer[0x01] = CMD_SEL_SIZE;
break;
default:
break;
}
/* Enable the USART DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Rx, ENABLE);
USART_DMACmd(USARTx, USART_DMAReq_Tx, ENABLE);
/* Clear the TC bit in the SR register by writing 0 to it */
USART_ClearFlag(USARTx, USART_FLAG_TC);
/* Enable the DMA USART Tx Channel */
DMA_Cmd(USARTx_TX_DMA_CHANNEL, ENABLE);
/* Enable the DMA USART Rx channel */
DMA_Cmd(USARTx_RX_DMA_CHANNEL, ENABLE);
/* Wait the USART DMA Tx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_TX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission*/
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Wait the USART DMA Rx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_RX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA1 global flags */
DMA_ClearFlag(USARTx_TX_DMA_FLAG_GL);
DMA_ClearFlag(USARTx_RX_DMA_FLAG_GL);
/* Disable the DMA channels */
DMA_Cmd(USARTx_TX_DMA_CHANNEL, DISABLE);
DMA_Cmd(USARTx_RX_DMA_CHANNEL, DISABLE);
/* Disable the USART Tx DMA request */
USART_DMACmd(USARTx, USART_DMAReq_Tx, DISABLE);
/* Disable the USART Rx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Rx, DISABLE);
/* DMA channel Tx of USART Configuration */
DMA_DeInit(USARTx_TX_DMA_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = USARTx_TDR_ADDRESS;
DMA_InitStructure.DMA_BufferSize = (uint16_t)CmdBuffer[0x01];
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_Init(USARTx_TX_DMA_CHANNEL, &DMA_InitStructure);
USART_DMACmd(USARTx, USART_DMAReq_Tx, ENABLE);
/* Clear the TC bit in the SR register by writing 0 to it */
USART_ClearFlag(USARTx, USART_FLAG_TC);
/* Enable DMA1 USART Tx Channel */
DMA_Cmd(USARTx_TX_DMA_CHANNEL, ENABLE);
/* Wait the USART DMA Tx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_TX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission*/
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA global flags */
DMA_ClearFlag(USARTx_TX_DMA_FLAG_GL);
DMA_ClearFlag(USARTx_RX_DMA_FLAG_GL);
DMA_Cmd(USARTx_TX_DMA_CHANNEL, DISABLE);
/* Disable the USART Tx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Tx, DISABLE);
CmdBuffer[0x00] = 0x00;
}
/* USART in Mode Receiver-------------------------------------------------*/
/* USART Receive Transaction command and the number of Bytes to receive */
if (CmdBuffer[0x00] != 0x00)
{
/* Wait the USART DMA Rx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_RX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA1 global flags */
DMA_ClearFlag(USARTx_TX_DMA_FLAG_GL);
DMA_ClearFlag(USARTx_RX_DMA_FLAG_GL);
/* Disable the DMA channels */
DMA_Cmd(USARTx_RX_DMA_CHANNEL, DISABLE);
/* Disable the USART Rx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Rx, DISABLE);
/* At this Steep the USART send the ACK command (after Receive the transaction
command and the number of data to receive this parameter is mandatory
to configure the DMA_BufferSize in the second reception phase */
AckBuffer[0x00] = CmdBuffer[0x00];
AckBuffer[0x01] = CMD_ACK;
/* DMA channel Tx of USART Configuration */
DMA_DeInit(USARTx_TX_DMA_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = USARTx_TDR_ADDRESS;
DMA_InitStructure.DMA_BufferSize = (uint16_t)2;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)AckBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_Init(USARTx_TX_DMA_CHANNEL, &DMA_InitStructure);
USART_DMACmd(USARTx, USART_DMAReq_Tx, ENABLE);
/* Clear the TC bit in the SR register by writing 0 to it */
USART_ClearFlag(USARTx, USART_FLAG_TC);
/* Enable DMA1 USART Tx Channel */
DMA_Cmd(USARTx_TX_DMA_CHANNEL, ENABLE);
/* Wait the USART DMA Tx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_TX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission*/
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA1 global flags */
DMA_ClearFlag(USARTx_TX_DMA_FLAG_GL);
DMA_ClearFlag(USARTx_RX_DMA_FLAG_GL);
DMA_Cmd(USARTx_TX_DMA_CHANNEL, DISABLE);
/* Disable the USART Tx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Tx, DISABLE);
/* The transmitter After receive the ACK command it sends the defined data
in his TxBuffer */
/* DMA channel Rx of USART Configuration */
DMA_DeInit(USARTx_RX_DMA_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = USARTx_RDR_ADDRESS;
DMA_InitStructure.DMA_BufferSize = (uint16_t)CmdBuffer[0x01];
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) RxBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(USARTx_RX_DMA_CHANNEL, &DMA_InitStructure);
USART_DMACmd(USARTx, USART_DMAReq_Rx , ENABLE);
/* Enable the DMA channel */
DMA_Cmd(USARTx_RX_DMA_CHANNEL, ENABLE);
/* Wait the USART DMA Rx transfer complete or time out */
TimeOut = USER_TIMEOUT;
while ((DMA_GetFlagStatus(USARTx_RX_DMA_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Clear DMA1 global flags */
DMA_ClearFlag(USARTx_TX_DMA_FLAG_GL);
DMA_ClearFlag(USARTx_RX_DMA_FLAG_GL);
/* Disable the DMA channels */
DMA_Cmd(USARTx_RX_DMA_CHANNEL, DISABLE);
/* Disable the USART Rx DMA requests */
USART_DMACmd(USARTx, USART_DMAReq_Rx, DISABLE);
switch (CmdBuffer[0x01])
{
/* CMD_RIGHT command received */
case CMD_RIGHT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE) != FAILED)
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED4 */
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_LEFT command received */
case CMD_LEFT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE) != FAILED)
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn OFF LED2 and LED3 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* CMD_UP command received */
case CMD_UP_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE) != FAILED)
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn OFF LED3 and LED4 */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_DOWN command received */
case CMD_DOWN_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE) != FAILED)
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED2 and LED4 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_SEL command received */
case CMD_SEL_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE) != FAILED)
{
/* Turn ON all LED2, LED3 and LED4 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
CmdBuffer[0x00] = 0x00;
}
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32l1xx_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32l1xx.c file
*/
/* I2C configuration ------------------------------------------------------*/
I2C_Config();
/* Initialize LEDs mounted on STM32L152-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* SysTick configuration ---------------------------------------------------*/
SysTickConfig();
/*************************************Master Code******************************/
#if defined (I2C_MASTER)
/* I2C De-initialize */
I2C_DeInit(I2Cx);
/*!< I2C Struct Initialize */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = 0xA0;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
/*!< I2C Initialize */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Enable Error Interrupt */
I2C_ITConfig(I2Cx, I2C_IT_ERR , ENABLE);
/* I2C ENABLE */
I2C_Cmd(I2Cx, ENABLE);
while (1)
{
NumberOfByteToReceive = RXBUFFERSIZE;
Rx_Idx = 0x00;
/* Clear the RxBuffer */
Fill_Buffer(RxBuffer, RXBUFFERSIZE);
/* Enable Event Interrupts */
I2C_ITConfig(I2Cx, I2C_IT_EVT , ENABLE);
/* Enable Acknowledge */
I2C_AcknowledgeConfig(I2Cx, ENABLE);
/* Generate the Start condition */
I2C_GenerateSTART(I2Cx, ENABLE);
/* Data transfer is performed in the I2C interrupt routine */
/* Wait until end of data transfer or time out*/
TimeOut = USER_TIMEOUT;
while ((Rx_Idx < RXBUFFERSIZE)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
if (Buffercmp(TxBuffer, RxBuffer, RXBUFFERSIZE) == PASSED)
{
/* LED2, LED3 and LED4 Toggle */
STM_EVAL_LEDToggle(LED2);
STM_EVAL_LEDToggle(LED3);
STM_EVAL_LEDToggle(LED4);
}
else
{
/* ED2, LED3 and LED4 On */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
delay(10);
}
#endif /* I2C_MASTER */
/**********************************Slave Code**********************************/
#if defined (I2C_SLAVE)
/*I2Cx DeInitialize*/
I2C_DeInit(I2Cx);
/*!< I2C Struct Initialize */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DUTYCYCLE;
I2C_InitStructure.I2C_OwnAddress1 = SLAVE_ADDRESS;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
#ifndef I2C_10BITS_ADDRESS
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
#else
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_10bit;
#endif /* I2C_10BITS_ADDRESS */
I2C_Init(I2Cx, &I2C_InitStructure);
/* Enable Error Interrupt */
I2C_ITConfig(I2Cx, I2C_IT_ERR , ENABLE);
/* I2C ENABLE */
I2C_Cmd(I2Cx, ENABLE);
/* Infinite Loop */
while (1)
{
Tx_Idx = 0x00;
/* Enable I2C event interrupt */
I2C_ITConfig(I2Cx, I2C_IT_EVT, ENABLE);
/* Wait until end of data transfer */
while (Tx_Idx < TXBUFFERSIZE)
{
}
/* LED2, LED3 and LED4 Toggle */
STM_EVAL_LEDToggle(LED2);
STM_EVAL_LEDToggle(LED3);
STM_EVAL_LEDToggle(LED4);
}
#endif /* I2C_SLAVE */
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f2xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f2xx.c file
*/
/* USART configuration -----------------------------------------------------*/
USART_Config();
/* SysTick configuration ---------------------------------------------------*/
SysTickConfig();
/* Initialize LEDs mounted on STM322xG-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
/* Configure the IO Expander mounted on STM322xG-EVAL board */
TimeOut = USER_TIMEOUT;
while ((IOE_Config() != IOE_OK) && (TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Enable the USARTx Receive interrupt: this interrupt is generated when the
USARTx receive data register is not empty */
USART_ITConfig(USARTx, USART_IT_RXNE, ENABLE);
while (1)
{
TxIndex = 0x00;
RxIndex = 0x00;
UsartTransactionType = USART_TRANSACTIONTYPE_CMD;
UsartMode = USART_MODE_RECEIVER;
Fill_Buffer(CmdBuffer, 0x02);
Fill_Buffer(AckBuffer, 0x02);
/* Clear the RxBuffer */
Fill_Buffer(RxBuffer, TXBUFFERSIZE);
PressedButton = IOE_JoyStickGetState();
/* Waiting Joystick is pressed or transaction command is received */
while ((PressedButton == JOY_NONE) && (CmdBuffer[0x00] == 0x00))
{
PressedButton = IOE_JoyStickGetState();
}
/*
If the Joystick is pressed go to transmitter mode, otherwise (the transaction
command is received) go to receiver mode
*/
/******************************************************************************/
/* USART in Mode Transmitter */
/******************************************************************************/
if ((PressedButton != JOY_NONE) && (CmdBuffer[0x00] == 0x00))
{
UsartMode = USART_MODE_TRANSMITTER;
switch (PressedButton)
{
/* JOY_RIGHT button pressed */
case JOY_RIGHT:
CmdBuffer[0x00] = CMD_RIGHT;
CmdBuffer[0x01] = CMD_RIGHT_SIZE;
break;
/* JOY_LEFT button pressed */
case JOY_LEFT:
CmdBuffer[0x00] = CMD_LEFT;
CmdBuffer[0x01] = CMD_LEFT_SIZE;
break;
/* JOY_UP button pressed */
case JOY_UP:
CmdBuffer[0x00] = CMD_UP;
CmdBuffer[0x01] = CMD_UP_SIZE;
break;
/* JOY_DOWN button pressed */
case JOY_DOWN:
CmdBuffer[0x00] = CMD_DOWN;
CmdBuffer[0x01] = CMD_DOWN_SIZE;
break;
/* JOY_SEL button pressed */
case JOY_SEL:
CmdBuffer[0x00] = CMD_SEL;
CmdBuffer[0x01] = CMD_SEL_SIZE;
break;
default:
break;
}
if (CmdBuffer[0x00]!= 0x00)
{
/* Enable the USARTx transmit data register empty interrupt */
USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
/* Wait until USART sends the command or time out */
TimeOut = USER_TIMEOUT;
while ((TxIndex < 0x02)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission*/
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* Wait until USART receives the Ack command or time out*/
TimeOut = USER_TIMEOUT;
while ((RxIndex < 0x02)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* USART sends the data */
UsartTransactionType = USART_TRANSACTIONTYPE_DATA;
TxIndex = 0x00;
RxIndex = 0x00;
/* Enable the USARTx transmit data register empty interrupt */
USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
/* Wait until end of data transfer */
TimeOut = USER_TIMEOUT;
while ((TxIndex < GetVar_NbrOfData())&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission*/
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
}
CmdBuffer[0x00] = 0x00;
}
/******************************************************************************/
/* USART in Receiver Mode */
/******************************************************************************/
if (CmdBuffer[0x00] != 0x00)
{
/* Wait until USART receives the command or time out */
TimeOut = USER_TIMEOUT;
while ((RxIndex < 0x02)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
UsartMode = USART_MODE_RECEIVER;
/* Enable the USARTx transmit data register empty interrupt */
USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
/* Wait until USART sends the ACK command or time out*/
TimeOut = USER_TIMEOUT;
while ((TxIndex < 0x02)&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission*/
TimeOut = USER_TIMEOUT;
while ((USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)&&(TimeOut != 0x00))
{
}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
/* USART receives the data */
UsartTransactionType = USART_TRANSACTIONTYPE_DATA;
TxIndex = 0x00;
RxIndex = 0x00;
/* Wait until end of data transfer or time out */
TimeOut = USER_TIMEOUT;
while ((RxIndex < GetVar_NbrOfData())&&(TimeOut != 0x00))
{}
if(TimeOut == 0)
{
TimeOut_UserCallback();
}
switch (CmdBuffer[0x01])
{
/* CMD_RIGHT command received */
case CMD_RIGHT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_RIGHT_SIZE) != FAILED)
{
/* Turn ON LED2 and LED3 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED4 */
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_LEFT command received */
case CMD_LEFT_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_LEFT_SIZE) != FAILED)
{
/* Turn ON LED4 */
STM_EVAL_LEDOn(LED4);
/* Turn OFF LED2 and LED3 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
}
break;
/* CMD_UP command received */
case CMD_UP_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_UP_SIZE) != FAILED)
{
/* Turn ON LED2 */
STM_EVAL_LEDOn(LED2);
/* Turn OFF LED3 and LED4 */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_DOWN command received */
case CMD_DOWN_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_DOWN_SIZE) != FAILED)
{
/* Turn ON LED3 */
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED2 and LED4 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
break;
/* CMD_SEL command received */
case CMD_SEL_SIZE:
if (Buffercmp(TxBuffer, RxBuffer, CMD_SEL_SIZE) != FAILED)
{
/* Turn ON all LED2, LED3 and LED4 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED3);
STM_EVAL_LEDOn(LED4);
}
break;
default:
break;
}
CmdBuffer[0x00] = 0x00;
}
}
}
