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•Created by Dtynin on 7/2/2024 in #📦-middleware-and-os

Troubleshooting 'USART Device Not Ready' Error on AVR Microcontroller with Zephyr RTOS

And finally the c code to test the above if they work

#include <zephyr.h>
#include <device.h>
#include <drivers/uart.h>
#include <logging/log.h>

LOG_MODULE_REGISTER(main);

#define UART_DEVICE_NODE DT_NODELABEL(usart1)

void main(void) {
    const struct device *uart_dev = DEVICE_DT_GET(UART_DEVICE_NODE);

    if (!device_is_ready(uart_dev)) {
        LOG_ERR("USART device not ready");
        return;
    }

    LOG_INF("USART device initialized successfully");

    const char msg[] = "Hello, USART!\n";
    uart_poll_out(uart_dev, msg[0]);

    for (int i = 1; msg[i] != '\0'; i++) {
        uart_poll_out(uart_dev, msg[i]);
    }
}

#include <zephyr.h>
#include <device.h>
#include <drivers/uart.h>
#include <logging/log.h>

LOG_MODULE_REGISTER(main);

#define UART_DEVICE_NODE DT_NODELABEL(usart1)

void main(void) {
    const struct device *uart_dev = DEVICE_DT_GET(UART_DEVICE_NODE);

    if (!device_is_ready(uart_dev)) {
        LOG_ERR("USART device not ready");
        return;
    }

    LOG_INF("USART device initialized successfully");

    const char msg[] = "Hello, USART!\n";
    uart_poll_out(uart_dev, msg[0]);

    for (int i = 1; msg[i] != '\0'; i++) {
        uart_poll_out(uart_dev, msg[i]);
    }
}

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