Problems with wiringx on DuoS

Duo
1

Hi,

I have the following code which enables the built in led ( I have removed blink.sh aside for now)

#!/bin/sh
# Example Pins


BUILTIN_LED_PIN=509
LED_GPIO=/sys/class/gpio/gpio${BUILTIN_LED_PIN}
if test -d ${LED_GPIO}; then
    echo "PIN ${BUILTIN_LED_PIN} already exported"
else
    echo ${BUILTIN_LED_PIN} > /sys/class/gpio/export
fi
echo out > ${LED_GPIO}/direction
echo 1 > ${LED_GPIO}/value
while true; do
    
    sleep 0.5
done

It turns on the led as expected, but this C program using wiringx does not turn on the builtin led:

#include <stdio.h>
#include <unistd.h>
#include <wiringx.h>
#include <termios.h>

#define LED_PIN 29 // 509 (BUILTIN_LED)

char get_keypress()
{
    struct termios oldt, newt;
    char ch;
    tcgetattr(STDIN_FILENO, &oldt);
    newt = oldt;
    newt.c_lflag &= ~(ICANON | ECHO);
    tcsetattr(STDIN_FILENO, TCSANOW, &newt);
    ch = getchar();
    tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
    return ch;
}
0
int main()
{
    if (wiringXSetup("milkv_duos", NULL) == -1)
    {
        printf("Failed to initialize WiringX.\n");
        return 1;
    }

    pinMode(LED_PIN, PINMODE_OUTPUT);
    printf("Press any key to turn on the Built-in LED...\n");
    get_keypress();

    // Turn LED ON
    digitalWrite(LED_PIN, HIGH);
    printf("Built-in LED is now ON!\n");

    while (1)
    {

        sleep(1);
    }

    return 0;
}

I see other issues on other pins also when the shell script can enable an output on a pin, but the C program using wiringx briefly flashes the led on.

Any ideas why this is happening?

1 Like
2

Have you checked pinmux ?

1 Like