#define CMD_BUF_SIZE 10
#define CMD_MAX_LENTGH 10
typedef struct
{
uint8_t buf[CMD_BUF_SIZE];
uint8_t point;
uint8_t status;
}_cmd;
_cmd cmd;
void HostCommand(void)
{
uint16_t bytes;
uint8_t byte;
bytes = USART3available();
while(bytes)
{
byte=USART3Read();
bytes--;
if(cmd.status==0)
{
if(byte=='@')
{
cmd.status=1;
cmd.buf[0]=byte;
cmd.point=1;
}
else
{
cmd.point=0;
}
}
else if(cmd.status==1)
{
if(cmd.point>CMD_MAX_LENTGH)
{
cmd.status=0;
cmd.point=0;
}
else if(cmd.point==3)//PLOADLENTH+OTHERLENTH)
{
cmd.buf[cmd.point++]=byte;
if((cmd.buf[1]=='F')&&(cmd.buf[2]=='S')&&(cmd.buf[3]=='#'))
{
CompassCaliStartCmd();
printf("Compass cali start!\r\n");
cmd.status=0;
cmd.point=0;
}
else if((cmd.buf[1]=='F')&&(cmd.buf[2]=='E')&&(cmd.buf[3]=='#'))
{
CompassCaliStopCmd();
printf("Compass cali end!\r\n");
cmd.status=0;
cmd.point=0;
}
else if((cmd.buf[1]=='D')&&(cmd.buf[2]=='S')&&(cmd.buf[3]=='#'))
{
DataStartCmd();
printf("Data out!\r\n");
cmd.status=0;
cmd.point=0;
}
else if((cmd.buf[1]=='D')&&(cmd.buf[2]=='E')&&(cmd.buf[3]=='#'))
{
DataStopCmd();
printf("Data stop!\r\n");
cmd.status=0;
cmd.point=0;
}
else
{
char string[10];
uint8_t i;
for(i=0;i<=cmd.point;i++)
{
string[i]=cmd.buf[i];
}
string[i]='\r';
string[i+1]='\n';
printf("%s",string);
cmd.status=0;
cmd.point=0;
}
}
else
{
cmd.buf[cmd.point++]=byte;
}
}
}
}