Issue with UART on rugged board

I genuinely believed you would probably have something useful to say. All I hear is a bunch of whining about something that you can fix if you were not too busy looking for attention. After all, I know it was my choice to read.. i99pro

I have added and shared your site to my social media accounts to send people back to your site because I am sure they will find it extremely helpful too. Face mask

Great article with excellent idea!Thank you for such a valuable article. I really appreciate for this great information.. Outdoor sauna

Great article with excellent idea!Thank you for such a valuable article. I really appreciate for this great information.. Window Replacement Companies

I appreciate several from the Information which has been composed, and especially the remarks posted I will visit once more. sauna

/* standard headers */
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

/* mraa header */
#include "mraa/uart.h"

#ifndef FALSE
#define FALSE 0
#define TRUE (!FALSE)
#endif

/* UART port name */
const char* dev_path = "/dev/ttyS4";

volatile sig_atomic_t flag = 1;

void
sig_handler(int signum)
{
 if (signum == SIGINT) {
 fprintf(stdout, "Exiting...\n");
        flag = 0;
    }
}

int
main(int argc, char** argv)
{
 mraa_result_t status = MRAA_SUCCESS;
    mraa_uart_context uart;
 char buffer[] = "Hello Mraa!";
 char buffer1[20];

 int baudrate = 9600, stopbits = 1, databits = 8;
 mraa_uart_parity_t parity = MRAA_UART_PARITY_NONE;
 unsigned int ctsrts = FALSE, xonxoff = FALSE;
 const char* name = NULL;

 /* install signal handler */
 signal(SIGINT, sig_handler);

 /* initialize mraa for the platform (not needed most of the time) */
 mraa_init();

    //! [Interesting]
 /* initialize uart */
    uart = mraa_uart_init_raw(dev_path);
 if (uart == NULL) {
 fprintf(stderr, "Failed to initialize UART\n");
 return EXIT_FAILURE;
    }

 /* set serial port parameters */
    status =
 mraa_uart_settings(-1, &dev_path, &name, &baudrate, &databits, &stopbits, &parity, &ctsrts, &xonxoff);
 if (status != MRAA_SUCCESS) {
 goto err_exit;
    }

 while (flag) {
 /* send data through uart */
 mraa_uart_write(uart, buffer, sizeof(buffer));

 sleep(5);

 mraa_uart_read(uart,buffer1,sizeof(buffer1));

 printf("Data Read %s\n",buffer1);
 sleep(5);         
 buffer1[0]='\0';

    }

 /* stop uart */
 mraa_uart_stop(uart);

    //! [Interesting]
 /* deinitialize mraa for the platform (not needed most of the time) */
 mraa_deinit();

 return EXIT_SUCCESS;

err_exit:
 mraa_result_print(status);

 /* stop uart */
 mraa_uart_stop(uart);

 /* deinitialize mraa for the platform (not needed most of the times) */
 mraa_deinit();

 return EXIT_FAILURE;
}

Try out the code above using the appropriate toolchain.

Let me know if this code worked for you.

I request you to do a loopback test for the designated UART port using the process below and then proceed for the program in C or Python:

RuggedBoard has 5x UART on different ports. To test UART1, locate P4 port on your RB (refer hardware manual) and

Step1:

Locate the port P4 on the RuggedBoard. Refer to the Hardware manual.

Step 2:

Short PIN 1 (RS232_TX_1) and PIN 2 (RS232_RX_1) using a patch cord provided in the Box to echo the transmitted data back to RuggedBoard.

Step 3:

Use the following command to check the loop-back of the transmitted data. Microcom is an application used to access serial ports.

microcom /dev/ttyS4

Note: Microcom is a serial terminal and it is installed in RuggedBoard by default.

Step 4:

Type anything on the keyboard. If the system is working fine the characters you are typing should be displayed in the terminal.

Step 5:

Press Ctrl + X to come out of the Microcom terminal and back to the Minicom.

Note: After entering the above command you will notice that whatever you type on your keyboard are getting displayed on the terminal and when you remove short of the PIN 1 and PIN 2 keyboard entries are not displayed anymore and resume the loop-back once you short the PINs again.