s32k144 LPUART

VanNgo285 — Mon, 14 Aug 2023 04:14:37 GMT

Hi,
I created a project which receive and send the string through LPUART with my laptop. The LPUART_DRV_GetReceiveStatus() function always return STATUS_BUSY after rerceived the first string from my laptop. What wrong in my code ? Can I clear the Rx receive flag ?

My code below,

void Debug_HardwareInitialize(void) { /* Initialize LPUART instance */ LPUART_DRV_Init(INST_LPUART_1, &lpUartState1, &lpuart_1_InitConfig1); /* Install the callback for rx events */ LPUART_DRV_InstallRxCallback(INST_LPUART_1, Debug_RxCallback, NULL); DebugPrint("\rDebug Init Complete"); } static void Debug_RxCallback(void *driverState, uart_event_t event, void *userData) { /* Unused parameters */ (void)driverState; (void)userData; /* Check the event type */ if(event == UART_EVENT_RX_FULL) { /* The reception stops when newline is received or the buffer is full */ if((Debug.RxBuffer[Debug.RxCounter] != '\0') && (Debug.RxBuffer[Debug.RxCounter] != CTRL_C) && (Debug.RxBuffer[Debug.RxCounter] != LF) && (Debug.RxBuffer[Debug.RxCounter] != CR) && (Debug.RxCounter != (DEBUG_BUFFER_LEN - 2U))) { /* Update the Buffer index and the RxBuffer */ Debug.RxCounter++; LPUART_DRV_SetRxBuffer(INST_LPUART_1, (uint8_t *)&Debug.RxBuffer[Debug.RxCounter], 1U); } } } void Debug_Process(void) { LPUART_DRV_ReceiveData(INST_LPUART_1, (uint8_t *)Debug.RxBuffer, 1U); /* Wait for transfer to be completed */ while(LPUART_DRV_GetReceiveStatus(INST_LPUART_1, &bytesRemaining) == STATUS_BUSY); status = LPUART_DRV_GetReceiveStatus(INST_LPUART_1, &bytesRemaining); if(status != STATUS_SUCCESS) { DebugPrint("\rCOM: An error occurred! The application will stop!"); } Debug.RxCounter++; Debug.RxBuffer[Debug.RxCounter] = 0U; DebugPrint("\rCOM: %s", Debug.RxBuffer); Debug.RxCounter = 0; memset(Debug.RxBuffer, 0, sizeof(Debug.RxBuffer)); }

Anyone know how to fix this problem ? Please support me.

Thanks

Re: s32k144 LPUART

VaneB — Tue, 15 Aug 2023 19:38:53 GMT

Hi @VanNgo285

I saw that your code is based on the SDK example (lpuart_echo_s32k1xx). Have you tried to run this example? If yes, did you have the same behavior?

B.R.

VaneB

Re: s32k144 LPUART

VanNgo285 — Fri, 18 Aug 2023 06:48:06 GMT

Hi,
I'll try it
Thank you very much

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