LCP 1549 UART will not receive properly.

markduffett — Thu, 01 Feb 2018 20:36:33 GMT

I'm using a LCP 1549 and UART based off the uart_polling example, but it will not receive properly. I can send and can confirm data is sent back to me but an interrupt is not triggering.

<<code>>

static void getLineUART(unsigned char *receive_buffer, uint32_t length)
{
UART_PARAM_T param;

param.buffer = (uint8_t *) receive_buffer;
param.size = length;

param.transfer_mode = RX_MODE_BUF_FULL ;
param.driver_mode = DRIVER_MODE_POLLING;

if (LPC_UARTD_API->uart_get_line(uartHandle, &param)) { // it waits here forever
errorUART();
}

}

<</code>>

trying the other transfer modes and sending /r/n or /0 had no effect.

Re: LCP 1549 UART will not receive properly.

kerryzhou — Sun, 11 Feb 2018 07:44:50 GMT

Hi Mark Duffett,

It seems you are using the lpcopen code for LP1549, which is downloaded from this link:

LPCOpen Software for LPC15XX|NXP

I also test the uart_polling_example, if you want to send back the data after you input each byte, please do a modification:

#define RECV_BUFF_SIZE 1

The orginal definition is 32, so the data just will echo back after it receives 32 Bytes, but if you modify the RECV_BUFF_SIZE to 1, then you will get each byte:

This is my test result:

Please test the polling example again.

Have a great day,
Kerry

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LPC Microcontrollersのトピック LCP 1549 UART will not receive properly.

LCP 1549 UART will not receive properly.

Re: LCP 1549 UART will not receive properly.