topic Re: UART and Thread in Kinetis Design Studio

Re: UART and Thread

ajaykr — Mon, 26 Dec 2016 10:32:01 GMT

Hi all,

Just now i tried the Uart-polling example with the same project,which is

working.I think the issues is with the interrupt.

On Mon, Dec 26, 2016 at 3:20 PM, Ajay K R <ajay.kr@erislabs.com> wrote:

Hi,
Thanks for reply.I'm using FRDM-64f board.First I checked my code alone
using the project uart non blocking,with interrupt and which is working
perfect.Then I moved the same code into the lwip tcp echo demo
project,which is now showing some issues.

      nRet = UART_DRV_Init(BOARD_DEBUG_UART3_INSTANCE, &uartState,
&uartConfig);
      pFunc = (uart_rx_callback_t *)uart_Callback;
      UART_DRV_InstallRxCallback(BOARD_DEBUG_UART3_INSTANCE
,(uart_rx_callback_t)pFunc ,&rxChar, 0, NULL);
      NVIC_SetPriority(I2C0_IRQn, 3U);
    while(true)
    {
     ReceiveCommandFromSerial();
     UART_DRV_ReceiveData(BOARD_DEBUG_UART3_INSTANCE , &rxChar , 8u);
    }

}
void uart_Callback()
{
__asm("nop");
}
If I use UART_DRV_SendData() function the whole board is getting hanging.
--
Regards
AJAY K R

Regards

AJAY K R

Re: UART and Thread

Alice_Yang — Tue, 27 Dec 2016 02:42:30 GMT

Hello AJAY K R,

Thanks for your sharing.

So now one hand you can use the polling method,

on the other hand, if you must use interrupt, you need debug and analysis it

step by step , for example check whether the data have send , debug into

the function to check it hang which code ...

Alice

Re: UART and Thread

ajaykr — Tue, 27 Dec 2016 04:27:54 GMT

Hi,

I conducted a step by step analysis,which shows a UART_DRV_SendData() function is showing blocking the entire code.Suggest some solution to solve the issue with interrupt method.Polling method is not suitable for my application.

Re: UART and Thread

Alice_Yang — Wed, 28 Dec 2016 04:03:38 GMT

Hello ,

You can share your project, then i debug on my side and check the problem.

ALice