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通过串口修改rtc时间

2008-09-16 16:00:28

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出厂前必须对m161的rtc时间进行设置。实际产品将网口去掉，但可以通过串口来设置。因为console同时在使用串口，因此在ask方面存在问题。

主要代码如下：

HANDLE hCom;

DCB ComCfg;

COMMTIMEOUTS ComTimeOut;

char buff[16];

char buff_w[17]；

int i,WriteSize,ReadSize;

DWORD CommMask=0,dwMask=0,dwTrans=0;

OVERLAPPED OLRead, OLWrite,OLos;

PACKET_CMD_SET_SERVER_TIME packet_cmd;

MS_TIME ms_os_time;

//打开com1

hCom = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0,

NULL);

if (hCom == INVALID_HANDLE_VALUE)

{

get_error();

}

if(GetCommState(hCom,&ComCfg)==0)

{

get_error();

}

//配置串口1的属性

ComCfg.BaudRate=CBR_57600;

ComCfg.fParity=FALSE;

ComCfg.fOutxCtsFlow=FALSE;

ComCfg.fOutxDsrFlow=FALSE;

ComCfg.fDtrControl=DTR_CONTROL_DISABLE;

ComCfg.fDsrSensitivity=FALSE;

ComCfg.fTXContinueOnXoff=TRUE;

ComCfg.fOutX=FALSE;

ComCfg.fInX=FALSE;

ComCfg.fErrorChar=FALSE;

ComCfg.fNull=FALSE;

ComCfg.fRtsControl=RTS_CONTROL_DISABLE;

ComCfg.XonLim=500;

ComCfg.XoffLim=500;

ComCfg.ByteSize=8;

ComCfg.Parity=NOPARITY;

ComCfg.StopBits=ONESTOPBIT;

ComCfg.XonChar=17;

ComCfg.XoffChar=19;

ComCfg.ErrorChar=0;

//ComCfg.StopBits=TWOSTOPBITS;

//ComCfg.Parity=EVENPARITY;

if(SetCommState(hCom,&ComCfg)==0)

{

get_error();

}

ComTimeOut.ReadIntervalTimeout=10;

ComTimeOut.ReadTotalTimeoutConstant=0;

ComTimeOut.ReadTotalTimeoutMultiplier=0;

ComTimeOut.WriteTotalTimeoutConstant=0;

ComTimeOut.WriteTotalTimeoutMultiplier=0;

if(SetCommTimeouts(hCom,&ComTimeOut)==0)

{

get_error();

}

GetCommMask(hCom,&CommMask);

CommMask=EV_RXFLAG|EV_RXCHAR|EV_TXEMPTY|EV_CTS|EV_EVENT2;

/*if(SetCommMask(hCom,CommMask)==0)

{

get_error();

}

SetupComm(hCom,MAXBLOCK,MAXBLOCK);

memset(&OLRead, 0, sizeof(OVERLAPPED));

memset(&OLWrite, 0, sizeof(OVERLAPPED));

memset(&OLos, 0, sizeof(OVERLAPPED));

/*if((OLRead.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL))==NULL)

return FALSE;

if((OLWrite.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL))==NULL)

return FALSE;

if((OLos.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL))==NULL)

return FALSE;*/

get_os_time(&ms_os_time);

/*buf_w[0]-buff[7]为协议头*，省略赋值/

buff_w[8]=ms_ar;

buff_w[9]=ms_h;

buff_w[10]=ms_os_time.day;

buff_w[11]=ms_os_time.hour;

buff_w[12]=ms_os_time.minute;

buff_w[13]=ms_os_time.second;

buff_w[14]=buff_w[15]=0;

while(1)

{

//memcpy(buff_w,&packet_cmd,16);

//memcpy(buff,buff_w,16);

if(WriteFile(hCom,buff_w,s

izeof(PACKET_CMD_SET_SERVER_TIME),(unsigned long*)&WriteSize,0)==0)

{

get_error();

//continue;

}

DBGPRINT(("write_size:%d\n",WriteSize));

break;

if(ReadFile(hCom,(unsigned long *)buff,16,(unsigned long*)&ReadSize,0)==0)

{

get_error();

}

//printf("writesize:%d,readsize:%d\n",WriteSize,ReadSize);

printf("\n");

Sleep(100);

//break;

}

CloseHandle(hCom);

存在问题：

如果采用memcpy对buff_w赋值，则m161收不到完整的数据；使用packed_cmd结构也收不到完整是数据，原因尚不清楚，郁闷中！只好算偏移地址对buff_w赋值，麻烦ing！

m161执行代码如下：

PPACKET_CMD_SET_SERVER_TIME pt_rtc;

struct timeval tv;

fd_set readfd;

int n=0;

int nsize;

MS_U8 buf[256];

struct rtc_time rt;

memset(buf, 0, 256);

tv.tv_sec=0;

tv.tv_usec=0;

FD_ZERO(&readfd);

FD_SET(fd,&readfd);

n=select(fd+1, &readfd, NULL, NULL, &tv);

while((nsize=read(fd,buf,256))>0){

//处理数据

}

注：在没有插U盘是该段代码会被周期性的调度，检测从串口收到的数据，根据收到数据的包头进行相应的操作。

本文发布于:2024-09-20 11:32:41，感谢您对本站的认可！

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标签：数据串口进行收到代码

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