81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
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* uart_handler.h
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*
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* Created on: Sep 16, 2019
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* Author: abody
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*/
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#ifndef UART_HANDLER_H_
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#define UART_HANDLER_H_
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#include <inttypes.h>
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#include <dma.h>
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#include <stats.h>
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#include "dma_helper.h"
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#include "crc_handler.h"
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/*
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* TH UART RXDMA TXDMA
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* 0 1 D2S5 D2S7
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* 1 3 D1S1 D1S3
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* 2 2 D1S5 D1S6
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* 3 6 D2S2 D2S6
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*/
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typedef struct {
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uint8_t startByte;
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uint8_t serial;
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uint8_t payloadLength;
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uint8_t hash;
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} UARTPACKETHEADER;
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typedef struct
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{
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UARTPACKETHEADER header;
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//!!! should start on word offset !!!
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uint8_t payload[256+sizeof(uint32_t)]; // extra room for crc32
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} __attribute__((aligned)) UARTPACKET;
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typedef struct _UARTBUFFER {
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UARTPACKET packet;
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//transfer area ends here
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volatile uint8_t busy;
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volatile uint8_t error;
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uint16_t requestedLength;
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uint32_t errorInfo;
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} UARTBUFFER;
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typedef struct {
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USART_TypeDef *uart;
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DMAINFO rxDmaInfo;
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DMAINFO txDmaInfo;
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struct crcstatus_t *crcStatus;
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uint8_t rxSerial;
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uint8_t txSerial;
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STATS stats;
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uint8_t activeRxBuf;
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uint8_t rxCrcSlot;
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uint8_t txCrcSlot;
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UARTBUFFER txBuffer;
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UARTBUFFER rxBuffers[2];
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} UARTSTATUS;
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#define STARTMARKER 0xa5
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void InitUartStatus(
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UARTSTATUS *st, USART_TypeDef *uart, DMA_TypeDef *dma,
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uint32_t stream_rx, uint32_t stream_tx,
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struct crcstatus_t *crcStatus, uint8_t rxCrcSlot, uint8_t txCrcSlot);
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static inline uint8_t* GetTxBuffer(UARTSTATUS *status) {
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return status->txBuffer.packet.payload;
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}
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uint8_t PostPacket(UARTSTATUS *status, uint8_t const *payload, uint16_t length, struct crcstatus_t *crcStatus);
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void SetupReceive(UARTSTATUS *status);
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void SetupTransmit(USART_TypeDef *uart, DMA_TypeDef* dma, uint32_t stream, void *buffer, uint32_t length);
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void ConsumePacket(UARTSTATUS *status, uint8_t packetIndex, struct crcstatus_t *crcStatus);
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void HandleUsartRxDmaIrq(UARTSTATUS *status);
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void HandleUsartTxDmaIrq(UARTSTATUS *status);
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void HandleUsartIrq(UARTSTATUS *status);
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#endif /* UART_HANDLER_H_ */
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