S32k146 UART RX interrupt not receiving entire buffer

bhanu_p — Mon, 14 Oct 2024 12:07:59 GMT

Hi,

i'm using S32k146 custom board PCB in that i'm trying to get the RX buffer using interrupt method but the thing is my interrupt call back function not triggering to get entire buffer.

for Example : if i send "AT+RESET" to MCU my call back function only triggering 3 times and i'm getting buffer only "AT" remaining buffer i'm not getting and my call back event is showing as "UART_EVENT_ERROR"

please go through the below given code for your reference

uart_init(void) { LPUART_DRV_Init(INST_LPUART1, &lpuart1_State, &lpuart1_InitConfig0); LPUART_DRV_InstallRxCallback(INST_LPUART1, iot_rx_callback, NULL); LPUART_DRV_SendDataBlocking(INST_LPUART1, ser_tx_cmd0, 4U, 100); } void iot_rx_callback(void *driverState, uart_event_t event, void *userData) { (void) driverState; (void) userData; if (event == UART_EVENT_RX_FULL) { if ((buffer[bufferIdx - 1] != '\r') && (buffer[bufferIdx] != '\n') && (bufferIdx != (BUFFER_SIZE - 1U))) { bufferIdx++; LPUART_DRV_SetRxBuffer(INST_LPUART1, &buffer[bufferIdx++], 1U); } else { bufferIdx=0; rx_complete = true; } } } while(1){ int ret =LPUART_DRV_ReceiveData(INST_LPUART1, buffer, 1U); if(ret=STATUS_SUCCESS){ while(LPUART_DRV_GetReceiveStatus(INST_LPUART1, &bytesRemaining) == STATUS_BUSY); ser_buffer_index=0; } /*********/ own code /********/ }

my normal TX data is transmitting properly without any trouble only problem i'm facing in RX data

Re: S32k146 UART RX interrupt not receiving entire buffer

Robin_Shen — Wed, 16 Oct 2024 03:52:58 GMT

I recommend you to refer to the example in S32K1xx Lpuart IDLE detected with DMA transfer.

Best Regards,
Robin
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S32k146 UART RX interrupt not receiving entire buffer

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