MQX UART Non-Blocking

scottmorrison — Fri, 15 Apr 2016 20:24:21 GMT

Hello, I am using a K60 with MQX. I am trying to install a second UART driver, in addition to the one used for stdout. I have set up the port using UART_DRV_Init. The port works fine if I send data using SendDataPolling, but as soon as I call SendData, the non blocking version, the system hangs. If I stop the debugger, the code looks like it is in the unhandled interrupt processing section.

Do I have to install my own handler? Here is the initialization portion of my code, this is happening inside of a thread :

uart_state_t uartState;

	uart_user_config_t uartConfig = {
	.bitCountPerChar = kUart8BitsPerChar,
	.parityMode	= kUartParityDisabled,
	.stopBitCount	= kUartOneStopBit,
	.baudRate	= BOARD_DEBUG_UART_BAUD
	};

uint8_t buff[TX_BUFFER_SIZE],respBuf[32],txBuf[128];

uint32_t count = 0;

TASK_PARAMS_PTR task_p = (TASK_PARAMS_PTR) param;

// Initialize the uart module with base address and config structure

SIM_HAL_EnableClock( SIM , kSimClockGatePortE );

SIM_HAL_EnableClock( SIM , kSimClockGatePortD );

SIM_HAL_EnableClock( SIM , kSimClockGatePortA );

CLOCK_SYS_EnableUartClock(5u);

configure_uart_pins( UART5_IDX );

// Get working uart clock

UART_DRV_Init(5u , &uartState, &uartConfig);

	uartSourceClock = CLOCK_SYS_GetUartFreq( UART5_IDX );

// Initialize UART baud rate, bit count, parity and stop bit

	UART_HAL_SetBaudRate(baseAddr, uartSourceClock, BOARD_DEBUG_UART_BAUD);
	UART_HAL_SetBitCountPerChar(baseAddr, kUart8BitsPerChar);
	UART_HAL_SetParityMode(baseAddr, kUartParityDisabled);

#if FSL_FEATURE_UART_HAS_STOP_BIT_CONFIG_SUPPORT

UART_HAL_SetStopBitCount(baseAddr, kUartOneStopBit);

#endif

	// Enable the UART transmitter and receiver
	UART_HAL_EnableTransmitter(baseAddr);
	UART_HAL_EnableReceiver(baseAddr);

buff[0] = 'Z';

UART_HAL_SendDataPolling(baseAddr, buff , 1 );

UART_HAL_SendDataPolling(baseAddr, buff, 1 );

	while(1)
	{

buff[0] = 'Z';

	//UART_HAL_SendDataPolling(baseAddr, buff, 1 ); // This works fine
	UART_DRV_SendData( 5u , buff, 1 ); // This crashes
	OSA_TimeDelay( 250 );

}

Any insights or help is appreciated.

Re: MQX UART Non-Blocking

soledad — Tue, 19 Apr 2016 19:14:48 GMT

Hi Scott,

Please check the below threads:

https://community.freescale.com/thread/351168#501499

HOW TO MAKE TWO SERIAL(UART) PORT IN FRDMK64F120

UART Example with KSDK

Using KSDK for interrupt driven UART?

I hope this helps,

Have a great day,
Sol

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