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STM32F30x - Add support for UART3 - untested.

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This commit is contained in:
Dominic Clifton 2014-12-09 02:55:36 +00:00
parent a4ec81450c
commit 693307d51d
3 changed files with 110 additions and 2 deletions
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102
src/main/drivers/serial_uart_stm32f30x.c
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@ -53,8 +53,15 @@
#define UART2_TX_PINSOURCE GPIO_PinSource5
#define UART2_RX_PINSOURCE GPIO_PinSource6
#define UART3_TX_PIN GPIO_Pin_10 // PB10 (AF7)
#define UART3_RX_PIN GPIO_Pin_11 // PB11 (AF7)
#define UART3_GPIO GPIOB
#define UART3_TX_PINSOURCE GPIO_PinSource5
#define UART3_RX_PINSOURCE GPIO_PinSource6
static uartPort_t uartPort1;
static uartPort_t uartPort2;
static uartPort_t uartPort3;
void uartStartTxDMA(uartPort_t *s);
@ -210,6 +217,85 @@ uartPort_t *serialUSART2(uint32_t baudRate, portMode_t mode)
return s;
}
uartPort_t *serialUSART3(uint32_t baudRate, portMode_t mode)
{
uartPort_t *s;
static volatile uint8_t rx3Buffer[UART3_RX_BUFFER_SIZE];
static volatile uint8_t tx3Buffer[UART3_TX_BUFFER_SIZE];
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
s = &uartPort3;
s->port.vTable = uartVTable;
s->port.baudRate = baudRate;
s->port.rxBufferSize = UART3_RX_BUFFER_SIZE;
s->port.txBufferSize = UART3_TX_BUFFER_SIZE;
s->port.rxBuffer = rx3Buffer;
s->port.txBuffer = tx3Buffer;
s->USARTx = USART3;
#ifdef USE_USART3_RX_DMA
s->rxDMAChannel = DMA1_Channel3;
s->rxDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->RDR;
#endif
#ifdef USE_USART3_TX_DMA
s->txDMAChannel = DMA1_Channel2;
s->txDMAPeripheralBaseAddr = (uint32_t)&s->USARTx->TDR;
#endif
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
#if defined(USE_USART3_TX_DMA) || defined(USE_USART3_RX_DMA)
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
#endif
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;
if (mode & MODE_TX) {
GPIO_InitStructure.GPIO_Pin = UART3_TX_PIN;
GPIO_PinAFConfig(UART3_GPIO, UART3_TX_PINSOURCE, GPIO_AF_7);
GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
}
if (mode & MODE_RX) {
GPIO_InitStructure.GPIO_Pin = UART3_RX_PIN;
GPIO_PinAFConfig(UART3_GPIO, UART3_RX_PINSOURCE, GPIO_AF_7);
GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
}
if (mode & MODE_BIDIR) {
GPIO_InitStructure.GPIO_Pin = UART3_TX_PIN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_PinAFConfig(UART3_GPIO, UART3_TX_PINSOURCE, GPIO_AF_7);
GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
}
#ifdef USE_USART3_TX_DMA
// DMA TX Interrupt
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART3_TXDMA);
NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART3_TXDMA);
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif
#ifndef USE_USART3_RX_DMA
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = NVIC_PRIORITY_BASE(NVIC_PRIO_SERIALUART3_RXDMA);
NVIC_InitStructure.NVIC_IRQChannelSubPriority = NVIC_PRIORITY_SUB(NVIC_PRIO_SERIALUART3_RXDMA);
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif
return s;
}
static void handleUsartTxDma(uartPort_t *s)
{
DMA_Cmd(s->txDMAChannel, DISABLE);
@ -238,6 +324,15 @@ void DMA1_Channel7_IRQHandler(void)
handleUsartTxDma(s);
}
// USART3 Tx DMA Handler
void DMA1_Channel2_IRQHandler(void)
{
uartPort_t *s = &uartPort3;
DMA_ClearITPendingBit(DMA1_IT_TC2);
DMA_Cmd(DMA1_Channel2, DISABLE);
handleUsartTxDma(s);
}
void usartIrqHandler(uartPort_t *s)
{
uint32_t ISR = s->USARTx->ISR;
@ -280,3 +375,10 @@ void USART2_IRQHandler(void)
usartIrqHandler(s);
}
void USART3_IRQHandler(void)
{
uartPort_t *s = &uartPort3;
usartIrqHandler(s);
}