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Old 11-19-2015, 11:59 PM   #1
ruc
LQ Newbie
 
Registered: Nov 2015
Posts: 3

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Multithreaded program for UART communication


Hi,

I am new comer to linux programing.I need to run a multithreaded application which will read and write data to 7 UART ports.
for each UART port there will be 2 deidcated threads (i.e. read and write threads).I have a c++ code which creates thread to read and write data to any particualr UART port.But i want to run all the 7 ports parallel.Plese help me to know how i need to modify the below code so that it can create 7 write and read threads for 7 UART ports and could simultaneoulsy read/write from/to all the ports.
Thank u so much in advance.

void *Uartsend(void * threadParameter);
void *Uartread(void * threadParameter);


int m_fd = -1;
struct termios m_tio;
int trun = 1;
int rrun = 1;
pthread_t p_Uartsend, p_Uartread;



int main(int argc, char *argv[])
{
int i, ret;
pthread_t p_Uartsend, p_Uartread;
void *thread_res;

//set baud rate,data bits.stop bit,parity nd flow control
setup serial port();

strncpy(port.uart_dev_name, argv[1], MAX_UART_NAME_LEN);

//Open the serial port
m_fd = SerialPort_Init(port, &m_tio);

// create write thread
ret = pthread_create(&p_Uartsend, NULL, Uartsend, NULL);
if (ret < 0)
{
exit(EXIT_FAILURE);
}

// create read thread
ret = pthread_create(&p_Uartread, NULL, Uartread, NULL);
if (ret < 0)
{
exit(EXIT_FAILURE);
}

ret = pthread_join(p_Uartsend, &thread_res);
ret = pthread_join(p_Uartread, &thread_res);
close(m_fd);
printf("\nExiting Test\n");
return 0;

}

void *Uartsend(void * threadParameter)
{
double speed;
double time;
int strLen = sizeof(test_str);
int writtenBytes = 0;
do
{
writtenBytes = Serial_WriteData(m_fd, test_str, strLen);

} while(1); // Run just once

return 0;
}
 
Old 11-20-2015, 09:49 AM   #2
jeremy
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Registered: Jun 2000
Distribution: Debian, Red Hat, Slackware, Fedora, Ubuntu
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Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread is being closed because it is a duplicate.
 
  


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