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usart_handler: DMA based memory copy

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This commit is contained in:
Attila Body 2019-10-01 14:49:10 +02:00
parent e8ab90c2b3
commit ecd6c1d5d6
13 changed files with 367 additions and 408 deletions
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5
lib/usart_handler.c
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@ -11,6 +11,7 @@
#include "usart_handler.h"
#include "dma_helper.h"
#include "crc_handler.h"
#include "memcpy_dma.h"
#ifndef DIAG_RX_BUFFER_SWITCH
# define DIAG_RX_BUFFER_SWITCH(x)
@ -73,7 +74,7 @@ uint8_t PostPacket(UARTSTATUS *status, uint8_t const *payload, uint16_t length,
BuildHeader(&status->txBuffer, status->txSerial++, length);
uint16_t payloadLength = (length+3) & 0xfffc; // round up to 4
if(payload)
memcpy(status->txBuffer.packet.payload, payload, length);
MemcpyDma(status->txBuffer.packet.payload, payload, length);
status->txBuffer.requestedLength = sizeof(UARTPACKETHEADER) + payloadLength + sizeof(uint32_t); // +4 for the hash
status->txBuffer.busy = 1;
status->txBuffer.error = 0;
@ -118,7 +119,7 @@ void ConsumePacket(UARTSTATUS *status, uint8_t packetIndex, struct crcstatus_t *
void SetupTransmit(USART_TypeDef *uart, DMA_TypeDef* dma, uint32_t stream, void *buffer, uint32_t length)
{
LL_DMA_ConfigAddresses(dma, stream, (uint32_t)buffer, LL_USART_DMA_GetRegAddr(uart),LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
LL_DMA_ConfigAddresses(dma, stream, (uint32_t)buffer, LL_USART_DMA_GetRegAddr(uart), LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
LL_DMA_SetDataLength(dma, stream, length);
LL_USART_EnableDMAReq_TX(uart);
LL_DMA_EnableStream(dma, stream);