ESP32 Forum

Posted: **Sun May 21, 2023 1:35 pm**

I am reading a data from a device, the data is 32bit long and i want to print it using ESP_LOG.
Here is my code

Code: [Select all] [Expand/Collapse]

void app_main(void)
{
    esp_err_t ret = nvs_flash_init();
    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
      ESP_ERROR_CHECK(nvs_flash_erase());
      ret = nvs_flash_init();
    }
    ESP_ERROR_CHECK(ret);
    ESP_LOGI(TAG, "Starting up!");
    //vSetGPIOlevel(GPIO_NUM_18,1);
    //vSetGPIOlevel(GPIO_NUM_19,1);
    spi_transaction_t spitHandler =  init_spi();
    while(1){
        sleep(1);
 
        uint32_t dataOut = readEMregister(0xc001,spitHandler );
 
        ESP_LOGI(TAG, "Register is %04X " ,dataOut );
 
    }
}

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It gives an error that "format '%X' expects argument of type 'unsigned int', but argument 6 has type 'uint32_t' {aka 'long unsigned int'} [-Werror=format=]"

How can i print it correctly, i dont want to split it and then print

Posted: **Sun May 21, 2023 4:51 pm**

Try "%Xl", or "%" PRIx32

Posted: **Mon May 22, 2023 12:35 pm**

Thanks for the hint. %lx works!

Posted: **Mon May 22, 2023 6:26 pm**

Great.
Sorry about the mixup

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