Hi Wally,
I have tried adding fflush(stdout and fflush(stderr) in the while loop,
however, in the UartRxWait thread, the read( ) function is in block waiting
for incoming data. Which doesn't output anything. In the case, after start
and shut down minicom, the UartRxWait thread running as usual, there is no
output from the fflush(stdout) and fflush(stderr) either.
yes, at the moment I have to kill the program to terminate. I have
modified the code such that it loop for only 5 times and terminate the
thread.
// UART RX thread
void* uartRxWait(void *param){
unsigned char receive[100];
int count;
static int n;
while(n<5){
if ((count = read(file, (void *)receive, 100))<0)
{
perror("Failed to read from input \n");
printf("count = %d\n", count);
}else{
if(receive[2]==0x32){
printf("Header received \n");
}
printf("Byte received [%d] \n", count);
printf("Value of Pi = 0x%.2x\n", receive[0]);
}
n++;
fflush(stdout);
fflush(stderr);
}
pthread_exit(0);
}
One thing I observed is that, my regular file write is able to write
something: I don't understand why?
fdata = fopen("capture.dat", "w");
if (fdata == NULL) {
printf("I couldn't open capture.dat for writing.\n");
exit(0);
}
// save in file
fprintf(fdata, "%s", "test");
Yes, I send the command before launching the thread to receive the reply. I
thought it doesn't matter as the receive byte will be stored in buffer.
Anyway, I tried placing the sending command after receive thread, but the
problem still exist.
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