单片机新框架修改

Posted 2020-10-05 WorkingNotes

前阵子做的单片机项目要使用新框架，不允许使用状态机，真是哔了狗了，很多代码要改，最终确定的方案是收到256后，找头找尾，有就处理，没有就往前移128，再读128个字符出来，相较之前的状态机处理效率，显然会下降，但是领导要求如此，那也没辙，同时也优化了数据处理的相关流程，学会了使用memmove，新的机制是，串口接收超时或者接收缓冲区半满或者全满时会置位，主程序中不断查询这个位。

串口1与GPS通信的代码改为如下

void UART1_DATA_PROC(void)
{
    char    *pS=NULL,*pE=NULL;
    int count = 0;
    uint32_t gUart1RxLen = 0;
    uint8_t gUart1PrBuf[RX_MAXSIZE] = {0};
    uint32_t  HALF_RXLEN = UART1_RXBUF_LEN /2;
//    printf("g g= %d %d\n",gUart1ReadInd,gUart1RxIndex);
    if(gUart1ReadInd != HALF_RXLEN && gUart1ReadInd != 0)
        return;
    if(gUart1RecvInd > gUart1ReadInd)
    {
        gUart1RxLen = HALF_RXLEN;
        memcpy(gUart1PrBuf,gUart1RxBuf + gUart1RxLen,gUart1RxLen);
        gUart1RecvInd = 0;
    }
    else if(gUart1RecvInd == gUart1ReadInd)
        return;
    else
    {
        gUart1RxLen = HALF_RXLEN;
        memcpy(gUart1PrBuf,gUart1RxBuf,gUart1RxLen);
        gUart1RecvInd = gUart1RxLen;
    }    

    memmove(Uart1RxBuf,Uart1RxBuf+HALF_RXLEN,HALF_RXLEN);
    memcpy(Uart1RxBuf+HALF_RXLEN,gUart1PrBuf,HALF_RXLEN);
    if(FirstTime == 0)
    {
        FirstTime = 1;
        return;
    }
        memset(Uart1ProcBuff,0,RX_MAXSIZE);
        pS = (char *)strstr(Uart1RxBuf,CMD_RMC);
        pE = (char *)strstr(pS,END_FLAG);
        if(pS != NULL && pE != NULL)
        {
                count = pE-pS;
                if(count > GPS_MAXLENTH)
                    return;
                memcpy(Uart1ProcBuff,pS,count);
                GpsDateType = RMC;
                if(count < GPS_MINLENTH)
                    GpsDateType = NOUSE;
                GPS_DATA_PROC();
        }
        memset(Uart1ProcBuff,0,RX_MAXSIZE);
        pS = (char *)strstr(Uart1RxBuf,CMD_GGA);
        pE = (char *)strstr(pS,END_FLAG);
        if(pS != NULL && pE != NULL)
        {
                count = pE-pS;
            if(count > GPS_MAXLENTH)
                return;
            memcpy(Uart1ProcBuff,pS,count);
            GpsDateType = GGA;
                if(count < GPS_MINLENTH)
                    GpsDateType = NOUSE;
                GPS_DATA_PROC();
        }
}

 串口0与上位机通信代码改为如下

void UART0_DATA_PROC()
{
	uint8_t ret = 0;
	uint8_t len = 0;
	uint32_t tUart0RxLen = 0;
	PM5K_PCM_DEV_PP_YDT1363_3 YdtBuf;
	if(gUart0RecvInd > gUart0ReadInd)
	{
		tUart0RxLen = UART0_RXBUF_LEN - gUart0RecvInd;
		memcpy(gUart0PrBuf,gUart0RxBuf + gUart0RecvInd,tUart0RxLen);
		gUart0RxLen += tUart0RxLen;
		gUart0RecvInd = gUart0ReadInd;
		if(gUart0RxLen < RCV_LENTH)
		return;	
	}
	else if(gUart0RecvInd == gUart0ReadInd)
		return;
	else
	{
		tUart0RxLen = gUart0ReadInd - gUart0RecvInd;
		if(gUart0RxLen > 0)
			memcpy(gUart0PrBuf+gUart0RxLen,gUart0RxBuf + gUart0RecvInd,tUart0RxLen);
		else
			memcpy(gUart0PrBuf,gUart0RxBuf + gUart0RecvInd,tUart0RxLen);
		gUart0RxLen += tUart0RxLen;
		gUart0RecvInd = gUart0ReadInd;
			if(gUart0RxLen != RCV_LENTH)
			{
				if(gUart0RxLen < RCV_LENTH)
				{
					if(gUart0RecvInd == UART0_RXBUF_LEN/2)
						return;
				}
				else
				{
					gUart0RxLen = 0;
					memset(gUart0PrBuf,0,20);
					return;
				}
			}			
	}	
	len = (uint8_t)gUart0RxLen;
	gUart0RxLen = 0;
	ret = ProtocolProc_YDT(TRUE,&YdtBuf, gUart0PrBuf, &len);
	memset(gUart0PrBuf,0,20);
	if(ret)
	{
		PopCmdQueue(ret);
	}
}