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simple UART Transmit and Receive on LPC1778

Posted by John Gaffey on August 13, 2013
I am trying to do a very simple transmit and receive a char on UART0 I have this for transmit:
void UART_Task_Init()
{
LPC_UART_TypeDef *UARTx = (LPC_UART_TypeDef *) LPC_UART0;
UART_CFG_Type UARTConfigStruct; /* UART Configuration structure variable */
UART_FIFO_CFG_Type UARTFIFOConfigStruct; /* UART FIFO configuration Struct variable */

/* Initialize UART Configuration parameter structure to default state:
* Baudrate = 9600bps, 8 data bit, 1 Stop bit, None parity */
UART_ConfigStructInit(&UARTConfigStruct);

/* Set Baudrate to 115200 */
//UARTConfigStruct.Baud_rate = 115200;

/* Initialize UART0 peripheral with given to corresponding parameter */
UART_Init(LPC_UART0, &UARTConfigStruct);
#if 1

/* Initialize FIFOConfigStruct to default state:
* - FIFO_DMAMode = DISABLE
* - FIFO_Level = UART_FIFO_TRGLEV0
* - FIFO_ResetRxBuf = ENABLE
* - FIFO_ResetTxBuf = ENABLE
* - FIFO_State = ENABLE
*/
UART_FIFOConfigStructInit(&UARTFIFOConfigStruct);
/* Initialize FIFO for UART0 peripheral */
UART_FIFOConfig(UARTx, &UARTFIFOConfigStruct);
/* Enable UART Transmit */
UART_TxCmd(UARTx, ENABLE);
#endif
}

Followed by a:

UART_Send(UARTx, (uint8_t *)string, strlen(string), BLOCKING);

It seems to try and transmit:
UART_SendByte(UARTx, (*pChar++));

the first character and then times out.

Is this the right path?

Also do you have a example receive?
I could not find serial example for 1778.

RE: simple UART Transmit and Receive on LPC1778

Posted by Richard on August 14, 2013
As we support hundreds of chips, with a massive range of peripheral IP, we are unfortunately unable to provide support on chip specific configuration (unless it is directly related to a FreeRTOS port).

If the IP is the same as that used on the 1768 (which I think it is) then you will find a lot of serial port related code in the the FreeRTOS+IO product - which is a free download.

Regards.


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