LPUART transmit and receive data inside an interrupt

kasundinesh — Sat, 12 May 2018 05:21:01 GMT

Hi,

I m designing an event driven packet handler using LPUART and processor expert. I have two packet ques for transmission and reception. I have configured DMA to transfer packets. for example

void on_tx_complete(void *driverState, uart_event_t event, void *userData)

{

GetPacketFromQue(&txbuff);

LPUART_DRV_SendData(INST_LPUART1, (uint8_t *)txbuff, strlen(welcomeMsg));

}

But this is not working. But when i do it in the main loop, it works.

I have the same problem for reception. I have called LPUART_DRV_ReceiveData(INST_LPUART1, &rx_byte, 1UL); in the main loop to enable reception in interrupt. So i get the first byte inside the interrupt. But then i call LPUART_DRV_ReceiveData(INST_LPUART1, &rx_byte, 1UL); inside the interrupt. it hangs and continuously executing the interrupt.

void on_rx_complete(void *driverState, uart_event_t event, void *userData)
{
LPUART_DRV_ReceiveData(INST_LPUART1, &rx_byte, 1UL);

}

But as long as in call this inside the main loop it works.

Can any one help me on this. I want to build it in event driven mode. I want to enable reception and transmit data inside interrupts. Can you provide me an example or some guidance. I have attached the project below. I m using S32 DS and S32K144_SDK_gcc v0.8.6.

Thank you

Re: LPUART transmit and receive data inside an interrupt

kasundinesh — Sat, 12 May 2018 05:51:50 GMT

Actually i fixed it by editing the lpuart_driver.c

Earlier it was under the callback function. But after i moved it above, it started working. Is there a specific reason to do it after the callback. Or was it designed to used with RTOS. Or is there any other workarounds for this?

S32 SDKのトピックLPUART transmit and receive data inside an interrupt

LPUART transmit and receive data inside an interrupt

Re: LPUART transmit and receive data inside an interrupt