Mirror/betaflight
1
0
Fork 0
mirror of https://github.com/betaflight/betaflight.git synced 2025-07-15 20:35:33 +03:00
Code Issues Wiki Activity

STM32F30x - Use USART2 non-DMA RX. This enables the use of serial-rx.

Browse source
This commit is contained in:
Dominic Clifton 2014-05-02 19:56:40 +01:00
parent 9b84d47d33
commit ef06d438e4
2 changed files with 43 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

67
src/drivers/serial_uart_stm32f30x.c
View file

@ -16,6 +16,10 @@
#include "serial_common.h"
#include "serial_uart.h"
// Using RX DMA disables the use of receive callbacks
#define USE_USART1_RX_DMA
//#define USE_USART2_RX_DMA
// USART1_TX PA9
// USART1_RX PA10
// USART2_TX PD5
@ -54,11 +58,11 @@ uartPort_t *serialUSART1(uint32_t baudRate, portMode_t mode)
s->port.rxBufferSize = UART1_RX_BUFFER_SIZE;
s->port.txBufferSize = UART1_TX_BUFFER_SIZE;
#ifdef USE_USART1_RX_DMA
s->rxDMAChannel = DMA1_Channel5;
#endif
s->txDMAChannel = DMA1_Channel4;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
@ -83,6 +87,14 @@ uartPort_t *serialUSART1(uint32_t baudRate, portMode_t mode)
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#ifndef USE_USART1_RX_DMA
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif
return s;
}
@ -104,15 +116,13 @@ uartPort_t *serialUSART2(uint32_t baudRate, portMode_t mode)
s->port.rxBuffer = rx2Buffer;
s->port.txBuffer = tx2Buffer;
#ifdef USE_USART2_RX_DMA
s->rxDMAChannel = DMA1_Channel6;
#endif
s->txDMAChannel = DMA1_Channel7;
s->USARTx = USART2;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOD, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
@ -137,6 +147,14 @@ uartPort_t *serialUSART2(uint32_t baudRate, portMode_t mode)
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#ifndef USE_USART2_RX_DMA
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif
return s;
}
@ -366,27 +384,9 @@ void DMA1_Channel7_IRQHandler(void)
handleUsartTxDma(s);
}
// USART1 Tx IRQ Handler
void USART1_IRQHandler(void)
void usartIrqHandler(uartPort_t *s)
{
uartPort_t *s = &uartPort1;
uint16_t ISR = s->USARTx->ISR;
if (ISR & USART_FLAG_TXE) {
if (s->port.txBufferTail != s->port.txBufferHead) {
s->USARTx->TDR = s->port.txBuffer[s->port.txBufferTail];
s->port.txBufferTail = (s->port.txBufferTail + 1) % s->port.txBufferSize;
} else {
USART_ITConfig(s->USARTx, USART_IT_TXE, DISABLE);
}
}
}
// USART2 Rx/Tx IRQ Handler
void USART2_IRQHandler(void)
{
uartPort_t *s = &uartPort2;
uint16_t ISR = s->USARTx->ISR;
uint32_t ISR = s->USARTx->ISR;
if (ISR & USART_FLAG_RXNE) {
// If we registered a callback, pass crap there
@ -406,3 +406,18 @@ void USART2_IRQHandler(void)
}
}
}
void USART1_IRQHandler(void)
{
uartPort_t *s = &uartPort1;
usartIrqHandler(s);
}
void USART2_IRQHandler(void)
{
uartPort_t *s = &uartPort2;
usartIrqHandler(s);
}

3
src/drivers/system_common.c
View file

@ -107,7 +107,8 @@ void systemInit(bool overclock)
RCC_APB1Periph_TIM2 |
RCC_APB1Periph_TIM3 |
RCC_APB1Periph_TIM4 |
RCC_APB1Periph_I2C2,
RCC_APB1Periph_I2C2 |
RCC_APB1Periph_USART2,
ENABLE
);
RCC_APB2PeriphClockCmd(