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Dtynin

•Created by Dtynin on 7/8/2024 in #code-review

Troubleshooting I2C Transaction Error with AVR Microcontroller and Zephyr RTOS

@Middleware & OS Gm guy's, I'm trying to interface an EEPROM with my AVR microcontroller using Zephyr RTOS. I've configured the I2C peripheral in the prj.conf file and set up the device tree bindings. However, when I attempt to write data to the EEPROM, I get an I2C transaction error. I have been able to configured the I2C peripheral in prj.conf. Created device bindings in the device tree source file (dts). and salso wrote an application to write data to the EEPROM. this is my code snippet:

#include <zephyr.h>
#include <device.h>
#include <drivers/i2c.h>
#include <logging/log.h>

LOG_MODULE_REGISTER(main);

#define EEPROM_I2C DT_NODELABEL(eeprom)

void main(void) {
    const struct device *i2c_dev = DEVICE_DT_GET(EEPROM_I2C);

    if (!device_is_ready(i2c_dev)) {
        LOG_ERR("I2C device not ready");
        return;
    }

    uint8_t data[2] = {0x00, 0xFF}; // Address and data to write
    int ret = i2c_write(i2c_dev, data, sizeof(data), EEPROM_ADDR);

    if (ret) {
        LOG_ERR("I2C write failed: %d", ret);
        return;
    }

    LOG_INF("Data written to EEPROM");
}

#include <zephyr.h>
#include <device.h>
#include <drivers/i2c.h>
#include <logging/log.h>

LOG_MODULE_REGISTER(main);

#define EEPROM_I2C DT_NODELABEL(eeprom)

void main(void) {
    const struct device *i2c_dev = DEVICE_DT_GET(EEPROM_I2C);

    if (!device_is_ready(i2c_dev)) {
        LOG_ERR("I2C device not ready");
        return;
    }

    uint8_t data[2] = {0x00, 0xFF}; // Address and data to write
    int ret = i2c_write(i2c_dev, data, sizeof(data), EEPROM_ADDR);

    if (ret) {
        LOG_ERR("I2C write failed: %d", ret);
        return;
    }

    LOG_INF("Data written to EEPROM");
}

Despite configuring everything, the I2C write operation fails. What could be causing this error?

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