/**
* @brief Configures the USART Peripheral.
* @param None
* @retval None
*/
static void USART_Config(void)
{
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIO clock */
RCC_AHBPeriphClockCmd(USARTx_TX_GPIO_CLK | USARTx_RX_GPIO_CLK, ENABLE);
/* Enable USART clock */
USARTx_APBPERIPHCLOCK(USARTx_CLK, ENABLE);
/* Connect PXx to USARTx_Tx */
GPIO_PinAFConfig(USARTx_TX_GPIO_PORT, USARTx_TX_SOURCE, USARTx_TX_AF);
/* Connect PXx to USARTx_Rx */
GPIO_PinAFConfig(USARTx_RX_GPIO_PORT, USARTx_RX_SOURCE, USARTx_RX_AF);
/* Configure USART Tx and Rx as alternate function push-pull */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Pin = USARTx_TX_PIN;
GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = USARTx_RX_PIN;
GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStructure);
/* USARTx configuration ----------------------------------------------------*/
/* USARTx configured as follow:
- BaudRate = 230400 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = 230400;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USARTx, &USART_InitStructure);
/* NVIC configuration: Enable the USARTx Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USARTx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable USART */
USART_Cmd(USARTx, ENABLE);
}
/*
* See the serial.h header file.
*/
void vSerialPortInit( eCOMPort ePort, unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
{
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Create the queues used to hold Rx/Tx characters. */
xRxedChars[ePort] = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
xCharsForTx[ePort] = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
/* If the queue/semaphore was created correctly then setup the serial port hardware. */
if( ( xRxedChars[ePort] == serINVALID_QUEUE ) || ( xCharsForTx[ePort] == serINVALID_QUEUE ) )
return;
if (ePort == serCOM1) {
/* Enable USART1 and GPIO clocks */
USARTx_APBPERIPHCLOCK( USARTx_CLK, ENABLE );
RCC_AHBPeriphClockCmd( USARTx_TX_GPIO_CLK, ENABLE );
RCC_AHBPeriphClockCmd( USARTx_RX_GPIO_CLK, ENABLE );
/* Connect PXx to USARTx_Tx */
GPIO_PinAFConfig(USARTx_TX_GPIO_PORT, USARTx_TX_SOURCE, USARTx_TX_AF);
/* Connect PXx to USARTx_Rx */
GPIO_PinAFConfig(USARTx_RX_GPIO_PORT, USARTx_RX_SOURCE, USARTx_RX_AF);
}
else {
/* Enable USART2 and GPIO clocks */
USARTy_APBPERIPHCLOCK( USARTy_CLK, ENABLE );
RCC_AHBPeriphClockCmd( USARTy_TX_GPIO_CLK, ENABLE );
RCC_AHBPeriphClockCmd( USARTy_RX_GPIO_CLK, ENABLE );
/* Connect PXx to USARTx_Tx */
GPIO_PinAFConfig(USARTy_TX_GPIO_PORT, USARTy_TX_SOURCE, USARTy_TX_AF);
/* Connect PXx to USARTx_Rx */
GPIO_PinAFConfig(USARTy_RX_GPIO_PORT, USARTy_RX_SOURCE, USARTy_RX_AF);
}
/* Configure USART Tx and Rx as alternate function push-pull */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
if (ePort == serCOM1) {
GPIO_InitStructure.GPIO_Pin = USARTx_TX_PIN;
GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = USARTx_RX_PIN;
GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStructure);
}
else {
GPIO_InitStructure.GPIO_Pin = USARTy_TX_PIN;
GPIO_Init(USARTy_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = USARTy_RX_PIN;
GPIO_Init(USARTy_RX_GPIO_PORT, &GPIO_InitStructure);
}
/* Configure USART parameters */
USART_InitStructure.USART_BaudRate = ulWantedBaud;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init((ePort == serCOM1) ? USARTx : USARTy, &USART_InitStructure);
/* Configure interrupts controller */
NVIC_InitStructure.NVIC_IRQChannel = (ePort == serCOM1) ? USARTx_IRQChannel
: USARTy_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
USART_ITConfig((ePort == serCOM1) ? USARTx : USARTy, USART_IT_RXNE, ENABLE);
/* Enable the USART */
USART_Cmd((ePort == serCOM1) ? USARTx : USARTy, ENABLE);
/* Init the xprintf library on debug interface */
if (ePort == serCOM1)
xdev_out(vPutCharToUSARTx);
}
/**
* @brief Configures the USART Peripheral.
* @param None
* @retval None
*/
static void USART_Config(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIO clock */
RCC_AHBPeriphClockCmd(USARTx_TX_GPIO_CLK | USARTx_RX_GPIO_CLK, ENABLE);
/* Enable USART clock */
USARTx_APBPERIPHCLOCK(USARTx_CLK, ENABLE);
/* Enable the DMA periph */
RCC_AHBPeriphClockCmd(DMAx_CLK, ENABLE);
/* Connect PXx to USARTx_Tx */
GPIO_PinAFConfig(USARTx_TX_GPIO_PORT, USARTx_TX_SOURCE, USARTx_TX_AF);
/* Connect PXx to USARTx_Rx */
GPIO_PinAFConfig(USARTx_RX_GPIO_PORT, USARTx_RX_SOURCE, USARTx_RX_AF);
/* Configure USART Tx and Rx as alternate function push-pull */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Pin = USARTx_TX_PIN;
GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = USARTx_RX_PIN;
GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStructure);
/* USARTx configuration ----------------------------------------------------*/
/* USARTx configured as follow:
- BaudRate = 230400 baud
- Word Length = 8 Bits
- one Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = 230400;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
/* When using Parity the word length must be configured to 9 bits */
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USARTx, &USART_InitStructure);
/* DMA Configuration -------------------------------------------------------*/
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
/* Enable USART */
USART_Cmd(USARTx, ENABLE);
}