S32k144 LPUART is not giving interrupt.

charan_123 — Mon, 27 Nov 2023 07:41:06 GMT

we have 20 bytes of data to be received from another controller. So in the ISR, is as below

if(event == UART_EVENT_RX_FULL){
if(buffer[buffer_id] == 0x01){
buffer_id = 1;
LPUART_DRV_SetRxBuffer(INST_LPUART_2, &buffer[1], 19U);
}
else if(buffer_id == 1){
copy_to_local_buffer();
buffer_id = 0;
LPUART_DRV_SetRxBuffer(INST_LPUART_2, &buffer[0], 1U);

Notify_task();

}
else{
buffer_neg++;
}
}
}

but if we receive 21 bytes, for continuously few times, then the UART is not hitting the ISR at all. Please help in this regards.

Re: S32k144 LPUART is not giving interrupt.

PetrS — Mon, 27 Nov 2023 11:52:34 GMT

Hi,

how was LPUART_DRV_ReceiveData called and do you also check for end of transfer anyhow/anywhere? Is a buffer_id modified or incremented anywhere too?

You can try to add UART_EVENT_END_TRANSFER event as well to know LPUART_DRV_ReceiveData will be needed to call again to allow further receiving.

BR, Petr

topic S32k144 LPUART is not giving interrupt. in S32K

S32k144 LPUART is not giving interrupt.

Re: S32k144 LPUART is not giving interrupt.