UART SDK Problem

philhale — Wed, 16 Dec 2015 19:20:58 GMT

KDS V3.0.0

KSDK V1.3.0

I am able to get the Debug Console UART routines to work just fine. However, when using the UART Peripheral Drivers (UART_DRV_*) to work, I am unable to get these routines to work properly. In the example below, I am getting only the first letter of the string buffStart to display in an infinite loop on the receiving RS232 port. As you can see below, I have tried this blocking and non-blocking, to no avail. I am using the GPIO LEDs as debugging features so please ignore these. Any ideas what is happening here with the UART?

int main(void)

/*lint -restore Enable MISRA rule (6.3) checking. */

{

/* Write your local variable definition here */

uint8_t buffStart[] = "++++++++++++++++ UART Send/Receive Non Blocking Example +++++++++++++++++\r\n";

uint8_t bufferData1[] = "\r\nType characters from keyboard, the board will receive and then echo them to terminal screen\r\n";

uint8_t byteCountBuff, txChar, rxChar;

/*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/

PE_low_level_init();

/*** End of Processor Expert internal initialization. ***/

/* Write your code here */

GPIO_DRV_Init(gpio1_InpConfig0, gpio1_OutConfig0); // Initialize GPIO

GPIO_DRV_WritePinOutput(LED_RED, ON); // Set LED to RED while program loads

UART_DRV_Init(UART0_IDX, &uartCom0_State, &uartCom0_InitConfig0);

// Inform to start non blocking example

byteCountBuff = sizeof(buffStart);

UART_DRV_SendDataBlocking(UART0_IDX, buffStart, byteCountBuff, 1);

//UART_DRV_SendData(UART0_IDX, "Hello", 5);

GPIO_DRV_WritePinOutput(LED_RED, OFF);

GPIO_DRV_WritePinOutput(LED_GREEN, ON);

// Wait until transmission is finished

//while (kStatus_UART_TxBusy == UART_DRV_GetTransmitStatus(UART0_IDX, NULL)){}

GPIO_DRV_WritePinOutput(LED_GREEN, OFF);

GPIO_DRV_WritePinOutput(LED_BLUE, ON);

// Inform user of what to do

byteCountBuff = sizeof(bufferData1);

UART_DRV_SendDataBlocking(UART0_IDX, bufferData1, byteCountBuff, 1);

GPIO_DRV_WritePinOutput(LED_RED, ON);

// Wait until transmission is finished

//while (kStatus_UART_TxBusy == UART_DRV_GetTransmitStatus(UART0_IDX, NULL)){}

GPIO_DRV_WritePinOutput(LED_GREEN, ON);

for(;;)

{

// Call received API

UART_DRV_ReceiveDataBlocking(UART0_IDX, &rxChar, 1u, 1);

// Wait until we receive a character

//while (kStatus_UART_RxBusy == UART_DRV_GetReceiveStatus(UART0_IDX, NULL)){}

// Echo received character

txChar = rxChar;

UART_DRV_SendDataBlocking(UART0_IDX, &txChar, 1u, 1);

};

Re: UART SDK Problem

philhale — Mon, 28 Dec 2015 17:40:49 GMT

I wasn't able to get the routines to work until I declared a RX buffer and modified the fsl_uart_driver.c routine as defined in the link below.

https://community.freescale.com/message/599730?et=watches.email.thread#599730

topic UART SDK Problem in Kinetis Software Development Kit

UART SDK Problem

Re: UART SDK Problem