59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "br_com_service.h"
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#include "br_modbus.h"
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uint8_t RecvContent[PAYLOAD_MAX_LEN] = {0};
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BrComStatus_t br_com_process(uint8_t * pucRecvBuffer, uint16_t usRecvBufferLen, uint8_t * pucSendBuffer, uint16_t * pusSendBufferLen)
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{
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BrComStatus_t status = BRCOMSTATUS_ERR;
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uint8_t header[2] = {0};
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uint16_t dataLen = 0;
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uint8_t recvDataLen, resDataLen = 0;
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uint8_t modbusResBuffer[256] = {0};
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/* 提取HEADER */
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header[0] = pucRecvBuffer[0];
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header[1] = pucRecvBuffer[1];
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if( header[0] != 0xAA && header[1] != 0xAA)
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{
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status = BRCOMSTATUS_HEADR_ERR;
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return status;
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}
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dataLen = ((uint16_t)pucRecvBuffer[2] << 8) + pucRecvBuffer[3];
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recvDataLen = dataLen & 0x00FF;
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/* 提取长度 */
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if( dataLen > 255 )
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{
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status = BRCOMSTATUS_LEN_ERR;
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return status;
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}
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else
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{
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/* 提取内容 */
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memcpy(RecvContent, pucRecvBuffer + 4, PAYLOAD_MAX_LEN-4);
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if(modbus_process(RecvContent, recvDataLen, modbusResBuffer, &resDataLen) == MODBUS_STATUS_OK)
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{
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pucSendBuffer[0] = 0xFF;
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pucSendBuffer[1] = 0xFF;
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pucSendBuffer[3] = 0x00;
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pucSendBuffer[4] = resDataLen;
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memcpy(pucSendBuffer + 4, modbusResBuffer, resDataLen);
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/* modbus协议处理 */
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status = BRCOMSTATUS_OK;
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return status;
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}
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}
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return status;
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}
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