Other Parts Discussed in Thread: AM4377
Hi,
I am using 4.19 rt-linux with am4377
I have basic a serial read task as given below:
void uartRead(){
osal_usleep(1'000'000);
Vector axesVal;
bool snyc_ = false;
int uart_filestream = -1;
uart_filestream = open("/dev/ttyS1", O_RDWR | O_NOCTTY);
//Open in blocking read/write mode
if (uart_filestream == -1)
{
printf("Unable to open UART\n");
return ;
}
My main calls the task as follows and waits for join
osal_thread_create_rt( &uart_t , stack64k*4, (void *) &uart_task, (void*) nullptr, 20);
When i send a SIGINT, the program closes however next time i run it, my program waits for open() to return a valid file descriptor, and in some cases although it returns a valid file descriptor(sometimes takes a few seconds) it halts my program, and cannot accept a SIGINT, kernel goes into some uninterruptable process and become unresponsive, it immedately freezes and requires a reboot.
I though i should close the port before exiting the problem, put a signal handler for SIGINT, in order to close the port before exiting however it did not solve it.
I made a search on net, found a similar issue:
https://stackoverflow.com/questions/4064832/open2-function-hangs-when-trying-to-open-serial-port-in-macos
It's the same problem that occurs in macos, i am not sure the cause is the same.
Thanks!
