Dtynin Comments - Answer Overflow

Dtynin

•Created by Dtynin on 8/5/2024 in #firmware-and-baremetal

GPIO Pin Configuration Error for DHT22 on AVR32UC with Zephyr OS

After checking the GPIO controller capabilities and flags, I realized I needed an additional flag for the input configuration. Here’s the updated code:

#include <zephyr.h>
#include <device.h>
#include <drivers/gpio.h>

#define DHT22_PIN 2
#define GPIO_PORT DT_LABEL(DT_NODELABEL(gpio0))

const struct device *gpio_dev;

void main(void)
{
    printk("Starting DHT22 sensor integration\n");

    gpio_dev = device_get_binding(GPIO_PORT);
    if (!gpio_dev) {
        printk("Failed to bind GPIO device: %s\n", GPIO_PORT);
        return;
    } else {
        printk("Successfully bound to GPIO device: %s\n", GPIO_PORT);
    }

    int ret = gpio_pin_configure(gpio_dev, DHT22_PIN, GPIO_INPUT | GPIO_PULL_UP);
    if (ret < 0) {
        printk("Failed to configure GPIO pin %d, error: %d\n", DHT22_PIN, ret);
    } else {
        printk("Successfully configured GPIO pin %d\n", DHT22_PIN);
    }
}

#include <zephyr.h>
#include <device.h>
#include <drivers/gpio.h>

#define DHT22_PIN 2
#define GPIO_PORT DT_LABEL(DT_NODELABEL(gpio0))

const struct device *gpio_dev;

void main(void)
{
    printk("Starting DHT22 sensor integration\n");

    gpio_dev = device_get_binding(GPIO_PORT);
    if (!gpio_dev) {
        printk("Failed to bind GPIO device: %s\n", GPIO_PORT);
        return;
    } else {
        printk("Successfully bound to GPIO device: %s\n", GPIO_PORT);
    }

    int ret = gpio_pin_configure(gpio_dev, DHT22_PIN, GPIO_INPUT | GPIO_PULL_UP);
    if (ret < 0) {
        printk("Failed to configure GPIO pin %d, error: %d\n", DHT22_PIN, ret);
    } else {
        printk("Successfully configured GPIO pin %d\n", DHT22_PIN);
    }
}

Now it’s working perfectly. Thanks for the help! @Dark AI

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