topic LPC2388 uart1 cann't send message in LPC Microcontrollers

LPC2388 uart1 cann't send message

liyabin — Wed, 18 Oct 2017 10:58:06 GMT

I use the LPC2388 microcontroller in my system.

Config as below.

Uart0 could correctly send message ,but uart1 could not correctly send message .

Thank you for your help !

PINSEL4 &= 0xFFFFFFF0;
PINSEL4 |= 0x0000000A; /* Enable RxD1 P2.1 *//* Enable TxD1 P2.0 */

PCONP |= (1UL << 4); //Enable UART1 interface power/clock
U1LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
U1DLL = 4; /* for 12MHz PCLK Clock ,baudrate 115200*/
U1FDR = 0x85; /* for 12MHz PCLK Clock */
U1LCR = 0x03; /* DLAB = 0 */

PINSEL0 &= 0xFFFFFF0F;
PINSEL0 |= 0x00000050;

PCONP |= (1UL << 3); /* Enable UART0 interface power/clock */
U0LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
U0DLL = 4; /* for 12MHz PCLK Clock */
U0FDR = 0x85;
U0LCR = 0x03;

int SER1_PutChar (int ch) {

while (!(U1LSR & 0x20));
U1THR = ch;
while (!(U0LSR & 0x20));
U0THR = ch;
return (ch);
}

Re: LPC2388 uart1 cann't send message

CarlosCasillas — Mon, 23 Oct 2017 21:48:17 GMT

Hi Li,

For UART usage on LPC23xx, you could take a look at following links:

http://www.keil.com/dd/vtr/4530/3413.htm

https://community.nxp.com/thread/446958

http://www.onarm.com/forum/18811/

https://github.com/psas/liblpc23xx/blob/master/lpc23xx-uart/lpc23xx-uart.c

Hope this will be useful for you.
Best regards!
/Carlos
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Re: LPC2388 uart1 cann't send message

liyabin — Wed, 08 Nov 2017 06:02:52 GMT

Thank you!

I removed the jlink,the message is ok!

Strange problem.