/**
* @brief This function handles I2C2 Error interrupt request.
* @param None
* @retval None
*/
void I2Cx_EV_IRQHandler(void)
{
#if defined (I2C_MASTER)
switch (I2C_GetLastEvent(I2Cx))
{
/* EV5 */
case I2C_EVENT_MASTER_MODE_SELECT :
#ifdef I2C_10BITS_ADDRESS
/* Send Header to Slave for write */
I2C_SendData(I2Cx, HEADER_ADDRESS_Write);
break;
/* EV9 */
case I2C_EVENT_MASTER_MODE_ADDRESS10:
#endif /* I2C_10BITS_ADDRESS */
/* Send slave Address for write */
I2C_Send7bitAddress(I2Cx, (uint8_t)SLAVE_ADDRESS, I2C_Direction_Transmitter);
break;
/* EV6 */
case I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED:
/* Send the I2C transaction code */
I2C_SendData(I2Cx, CmdTransmitted);
break;
/* EV8 */
case I2C_EVENT_MASTER_BYTE_TRANSMITTING:
case I2C_EVENT_MASTER_BYTE_TRANSMITTED:
if (Tx_Idx == GetVar_NbrOfDataToTransfer())
{
/* Send STOP condition */
I2C_GenerateSTOP(I2Cx, ENABLE);
I2C_ITConfig(I2Cx, I2C_IT_EVT | I2C_IT_BUF, DISABLE);
}
else
{
/* Transmit Data TxBuffer */
I2C_SendData(I2Cx, TxBuffer[Tx_Idx++]);
}
break;
default:
break;
}
#endif /* I2C_MASTER*/
#if defined (I2C_SLAVE)
/* Get Last I2C Event */
Event = I2C_GetLastEvent(I2Cx);
switch (Event)
{
/* Check on EV1*/
case I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED:
Rx_Idx = 0x00;
break;
/* Check on EV2*/
case I2C_EVENT_SLAVE_BYTE_RECEIVED:
case (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_SR1_BTF):
if (CmdReceived == 0x00)
{
CmdReceived = I2C_ReceiveData(I2Cx);
}
else
{
RxBuffer[Rx_Idx++] = I2C_ReceiveData(I2Cx);
}
break;
/* Check on EV4 */
case (I2C_EVENT_SLAVE_STOP_DETECTED):
I2C_GetFlagStatus(I2Cx, I2C_FLAG_STOPF);
I2C_Cmd(I2Cx, ENABLE);
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_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 */
}
