SPC5748G LINFLEXD_UART Using RXCallback Missing even Bytes

[cskwon]

hello everyone

I am using SPC5748G.

I am using UART with LINFLEXD_UART2

The baudrate is 921600, and it is connected to the Wi-Fi module.

The data sent by the Wi-Fi module is processed in the callback with the install_rxcallback function.

The problem is that when I store the received data as an array, even bytes are missing.
ex:) If the total content to be received is "+eventapp:boot_complete",
The actual received data receives "+vnapbo_opee" and stores it in an array.

The callback function is as follows.

void WiFi_UART_Callback(void *driverState, uart_event_t event, void *userData)
{
	  char Str_Test = 0;
	  // Disable interrupt
	  INT_SYS_DisableIRQ(LINFLEXD2_RX_IRQn);
	  INT_SYS_DisableIRQ(LINFLEXD2_TX_IRQn);
//
	  LINFLEXD_UART_DRV_ReceiveData(INST_WIFI_UART, &WiFi_UART_RX_Buffer, 1U);
	  WiFi_Received_Data[WiFi_Received_Count] = WiFi_UART_RX_Buffer;
	  WiFi_Received_Count++;

//	  Str_Test = strstr(WiFi_Received_Data, "complete");
	  if(WiFi_Received_Count >= 20)
	  {
		  Str_Test = 0xFF;
	  }

//	  // Enable interrupt
	  INT_SYS_EnableIRQ(LINFLEXD2_RX_IRQn);
	  INT_SYS_EnableIRQ(LINFLEXD2_TX_IRQn);
}

The clock settings are as follows.

LIN2_CLK - Interface Clock : F40, Clock Source : F80, Frequency : 80MHz

I don't know what the hell is the problem.

Thank you very much for your reply. thank you.

[PetrS]

Hi,

can you decrease baudrate of the used Wi-Fi module? Maybe it is fast enough if also anything else is running and served. Also try to increase interrupt priority for used UART2 module.

BR, Petr

[cskwon]

Hi. Thanks Reply

How to increase interrupt priority?

in processor expert??

[PetrS]

Hi,

using INT_SYS_SetPriority(LINFLEXD2_RX_IRQn,15);  // 15 (highest priority) down to 0
(lowest priority).

BR, Petr

[cskwon]

Thanks, Solution

I changed Priority (changed to 15)
Sometimes data loss occurs.

Is there any other way to handle RX faster than the callback function?

BR.

[PetrS]

Hi,

you can try to create circular buffer and use just SetRxBuffer function within rx callback, so do not call ReceiveData each time. Refer e.g. to UART_pal demo code.

BR, Petr