UART ISR

[Piskun]

Hello everyone.

I'm starting my adventure with ESP32. Right now I am trying to rewrite some code from STM32. I searched the whole forum, but I did not find the code to use uart hardware interrupt, without fifo queues. I need this to get information about framing error (time critical DMX code, I can`t wait for queue event).

Code: Select all

#define EX_UART_NUM UART_NUM_0
#define BUF_SIZE (1024)
static QueueHandle_t uart0_queue;
uart_isr_handle_t *handle_console;

void deb_ini()
{ 
    uart_config_t uart_config = {
        .baud_rate = 115200,
        .data_bits = UART_DATA_8_BITS,
        .parity = UART_PARITY_DISABLE,
        .stop_bits = UART_STOP_BITS_1,
        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
    };
    uart_param_config(EX_UART_NUM, &uart_config);
    uart_set_pin(EX_UART_NUM, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
    uart_driver_install(EX_UART_NUM, 0, 0, 0, NULL, 0);
   
    uart_isr_register(EX_UART_NUM,uart_intr_handle,NULL,ESP_INTR_FLAG_LOWMED,handle_console);
 
 uart_enable_rx_intr(EX_UART_NUM);
 }
 
 static void IRAM_ATTR uart_intr_handle()
{
 printf("ISR \n");   
}

After upload code starts normally, printing sommething, but after sending anything to ESP :

abort() was called at PC 0x40081e5d on core 0

Backtrace: 0x40085f94:0x3ffc04f0 0x40086093:0x3ffc0510 0x40081e5d:0x3ffc0530 0x40081f7d:0x3ffc0560 0x400de20e:0x3ffc0580 0x400de269:0x3ffc05c0 0x40082ed2:0x3ffc05e0 0x400818e1:0x3ffc0600

Rebooting...

Second question, how to check where interrupt comes from?

Thank you for any advice.

[ESP_Sprite]

You cannot run any function that is not specifically specified to be compatible with ISRs in an ISR. Printf is not one of these functions, so it'll crash.