Callback scheduling

[IFX-Anusha]

Hi,

We are working on the psoc6 port. In that, the GPIO interrupt function is presumably blocked by the UART. Because after running the code from thonny/repl , the callback function is only executed after giving an input character from the repl. To solve this I also have added MICROPY_EVENT_POLL_HOOK in the mp_hal_stdin_rx_chr(void) function as below,

int mp_hal_stdin_rx_chr(void) {
    for(;;){
    uint8_t c = 0;
    cy_rslt_t result;
    result = cyhal_uart_getc(&cy_retarget_io_uart_obj, &c, 0);
    if(result == CY_RSLT_SUCCESS){
    return c;
    }
    MICROPY_EVENT_POLL_HOOK
    }
}

Could anyone help me by giving more insights on the mp_sched_schedule() function with any possible solutions? Thanks in Advance!!

[sophiedegran]

Have you look at github.com/peterhinch/micropython-async/tree/master/v3/as_demo/auart.py ? Don't know if that help you... but I think async mode can be a good solution

[IFX-Anusha]

Thanks for the reply!!. But this is not what I am looking for. I would like to understand about the mp_sched_schedule() function and the issue I mentioned above.

[andrewleech]

The scheduler is handled in MICROPY_EVENT_POLL_HOOK so yes it's common practice to call that in any idle loop like waiting for input and sleep functions.

See:

• micropython/ports/stm32/mphalport.c

  Line 38 in 30b0ee3

  MP_WEAK int mp_hal_stdin_rx_chr(void) {

• micropython/ports/esp32/mphalport.c

  Line 115 in 30b0ee3

  int mp_hal_stdin_rx_chr(void) {

[IFX-Anusha]

Thankyou! Now it's clear.