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Code Issues Wiki Activity

Reinstate UART TX DMA for F7 (HAL driver)

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This commit is contained in:
jflyper 2018-10-20 21:31:49 +09:00
parent 9ab8370379
commit 82a4d42b0e
3 changed files with 34 additions and 29 deletions
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36
src/main/drivers/serial_uart_hal.c
View file

@ -33,6 +33,7 @@
#ifdef USE_UART
#include "build/build_config.h"
#include "build/atomic.h"
#include "common/utils.h"
#include "drivers/io.h"
@ -232,26 +233,40 @@ void uartSetMode(serialPort_t *instance, portMode_e mode)
uartReconfigure(uartPort);
}
void uartStartTxDMA(uartPort_t *s)
void uartTryStartTxDMA(uartPort_t *s)
{
uint16_t size = 0;
uint32_t fromwhere=0;
HAL_UART_StateTypeDef state = HAL_UART_GetState(&s->Handle);
if ((state & HAL_UART_STATE_BUSY_TX) == HAL_UART_STATE_BUSY_TX)
ATOMIC_BLOCK(NVIC_PRIO_SERIALUART_TXDMA) {
if (s->txDMAStream->CR & DMA_SxCR_EN) {
// DMA is already in progress
return;
}
HAL_UART_StateTypeDef state = HAL_UART_GetState(&s->Handle);
if ((state & HAL_UART_STATE_BUSY_TX) == HAL_UART_STATE_BUSY_TX) {
return;
}
if (s->port.txBufferHead == s->port.txBufferTail) {
// No more data to transmit
s->txDMAEmpty = true;
return;
}
uint16_t size;
uint32_t fromWhere = s->port.txBufferTail;
if (s->port.txBufferHead > s->port.txBufferTail) {
size = s->port.txBufferHead - s->port.txBufferTail;
fromwhere = s->port.txBufferTail;
s->port.txBufferTail = s->port.txBufferHead;
} else {
size = s->port.txBufferSize - s->port.txBufferTail;
fromwhere = s->port.txBufferTail;
s->port.txBufferTail = 0;
}
s->txDMAEmpty = false;
//HAL_CLEANCACHE((uint8_t *)&s->port.txBuffer[fromwhere],size);
HAL_UART_Transmit_DMA(&s->Handle, (uint8_t *)&s->port.txBuffer[fromwhere], size);
HAL_UART_Transmit_DMA(&s->Handle, (uint8_t *)&s->port.txBuffer[fromWhere], size);
}
}
uint32_t uartTotalRxBytesWaiting(const serialPort_t *instance)
@ -351,8 +366,7 @@ void uartWrite(serialPort_t *instance, uint8_t ch)
}
if (s->txDMAStream) {
if (!(s->txDMAStream->CR & 1))
uartStartTxDMA(s);
uartTryStartTxDMA(s);
} else {
__HAL_UART_ENABLE_IT(&s->Handle, UART_IT_TXE);
}

4
src/main/drivers/serial_uart_impl.h
View file

@ -171,11 +171,7 @@ extern uartDevice_t *uartDevmap[];
extern const struct serialPortVTable uartVTable[];
#ifdef USE_HAL_DRIVER
void uartStartTxDMA(uartPort_t *s);
#else
void uartTryStartTxDMA(uartPort_t *s);
#endif
uartPort_t *serialUART(UARTDevice_e device, uint32_t baudRate, portMode_e mode, portOptions_e options);

7
src/main/drivers/serial_uart_stm32f7xx.c
View file

@ -376,12 +376,7 @@ void uartIrqHandler(uartPort_t *s)
static void handleUsartTxDma(uartPort_t *s)
{
if (s->port.txBufferHead != s->port.txBufferTail)
uartStartTxDMA(s);
else
{
s->txDMAEmpty = true;
}
uartTryStartTxDMA(s);
}
void dmaIRQHandler(dmaChannelDescriptor_t* descriptor)