static void OnUartData()
{
// UART receiving buffer: PACKET structure
static byte s_uartData[sizeof(PACKET)];
// -1 indicates magic byte not received yet
static int s_cbUartData = -1;
byte b = UART_RECV();
if (s_cbUartData < 0)
{
// Not started yet, looking for the magic byte
if (b == UART_PACKET_MAGIC)
{
// Found magic byte, start receiving from next incoming byte
s_cbUartData = 0;
}
}
else
{
// The logic will make sure s_cbUartData is less than UART_PACKET_SIZE here
s_uartData[s_cbUartData] = b;
s_cbUartData ++;
if (s_cbUartData == sizeof(PACKET))
{
// Reset packet byte counter for next packet
s_cbUartData = -1;
OnPacket((const PACKET*)s_uartData);
}
}
}
/*主函数体*/
int main(int argc, char **argv)
{
int fd; //文件描述符
int err; //返回调用函数的状态
int len;
int i;
char rcv_buf[200];
char send_buf[30]="**This's a GPS Locator!**\n";
int listen_fd,accept_fd;
struct sockaddr_in client_addr;
int n;
// int nbytes;
if(argc != 3){
printf("Usage: %s /dev/ttyS* s-Send/r-Receive\n",argv[0]);
return FALSE;
}
fd = UART_OPEN(fd,argv[1]); //打开串口，返回文件描述符
do{
err = UART_DEFAULT(fd);
}while(FALSE == err || FALSE == fd);
printf("Port is READY!\n");
if((listen_fd=socket(AF_INET,SOCK_STREAM,0))<0) //创建socket
{
printf("Socket Error:%s\n\a",strerror(errno));
return FALSE;
}
bzero(&client_addr,sizeof(struct sockaddr_in));
client_addr.sin_family=AF_INET;
client_addr.sin_port=htons(MY_PORT);
client_addr.sin_addr.s_addr=htonl(INADDR_ANY);
n=1;
setsockopt(listen_fd,SOL_SOCKET,SO_REUSEADDR,&n,sizeof(int)); //如果服务器终止后,服务器可以第二次快速启动而不用等待一段时间
if(bind(listen_fd,(struct sockaddr *)&client_addr,sizeof(client_addr))<0) //Bind
{
printf("Bind Error:%s\n\a",strerror(errno));
return FALSE;
}
listen(listen_fd,MAX_CONN_NUM);
if(0 == strcmp(argv[2],"s"))
{
for(i = 0;i < 50;i++)
{
len = UART_SEND(fd,send_buf,30);
if(len > 0)
printf("Count.%d :Send data successful!\n",i);
else
printf("Count.%d :Send data failed!\n",i);
sleep(1);
}
}
else if(0 == strcmp(argv[2],"r"))
{
while (1) //循环读取数据
{
accept_fd=accept(listen_fd,NULL,NULL);
if((accept_fd<0)&&(errno==EINTR))
continue;
else if(accept_fd<0)
{
printf("Accept Error:%s\n\a",strerror(errno));
continue;
}
if((n=fork())==0)
{
/* 子进程处理客户端的连接 */
unsigned int i;
for(i=0;i<200;i++){
len = UART_RECV(fd, rcv_buf,MAX_REC_BUFF);
if(len > 0)
write(accept_fd,rcv_buf,len);
else
printf("(Time limit)No data now!\n");
}
close(accept_fd);
exit(0);
}
else if(n<0)
printf("Fork Error:%s\n\a",strerror(errno));
}
}
else
{
fprintf(stderr,"Unsupported char:'s' or 'r'\n");
return (FALSE);
}
UART_CLOSE(fd);
close(listen_fd);
return 0;
}
