about LPC 1125 UART1 / UART2

owenpeng — Tue, 17 Jul 2018 06:53:12 GMT

Hi

My problem about LPC 1125 UART1 / UART2

. IDE : LPCXpresso V 8.22

.DEMO Board: OM13080

.I need 3 Uarts .

With Example “ periph_uart_rb” Project in lpcopen_2_17_lpcxpresso_nxp_lpcxpresso_1125.zip,

TEST UART0, It work very well。 AS I initialize UART1 & UART2 and test , They can not work well.

I need your HELP ,Thank you very much !!!

Owen

///////////////////////////////////////////////////////////////////////////////////////////////////////////////

I find the differents among UART0 / UART1/ UART2:

(1)Initialize Pin_Mux

static void Init_UART_PinMux(void) // UART0

{

Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO1_6, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)); /* RXD */

Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO1_7, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)); /* TXD */

}

static void Init_UART_PinMux(void)//UART1

{

Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO0_7, (IOCON_FUNC3 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)); /* RXD */

Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO0_6, (IOCON_FUNC3 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)); /* TXD */

}

static void Init_UART_PinMux(void)//UART2

{

Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO0_3, (IOCON_FUNC3 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)); /* RXD */

Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO1_8, (IOCON_FUNC3 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)); /* TXD */

}

(2)UART interrupt handler

void UART_IRQHandler(void)// UART0

{

}

void UART1_IRQHandler(void)// UART1

{

}

void UART1_IRQHandler(void)// UART1

{

}

(3)Chip_UART_Init

// The following FUNCTION only init UART0 ,In clock_112x.h do not define SYSCON_CLOCK_UART1 ，SYSCON_CLOCK_UART2

void Chip_UART_Init(LPC_UART_T *pUART) ;

{

Chip_Clock_EnablePeriphClock(SYSCON_CLOCK_UART0); // uart0

Chip_Clock_SetUARTClockDiv(1); // LPC_SYSCON->UART0CLKDIV = div;

/* Enable FIFOs by default, reset them */

Chip_UART_SetupFIFOS(pUART, (UART_FCR_FIFO_EN | UART_FCR_RX_RS | UART_FCR_TX_RS));

/* Default 8N1, with DLAB disabled */

Chip_UART_ConfigData(pUART, (UART_LCR_WLEN8 | UART_LCR_SBS_1BIT | UART_LCR_PARITY_DIS));

/* Disable fractional divider */

pUART->FDR = 0x10;

}

If i intialize UART1 、 UART2 The function “ void Chip_UART_Init(LPC_UART_T *pUART) ” need modify:

void Chip_UART1_Init(LPC_UART_T *pUART) ;

{

Chip_Clock_EnablePeriphClock(SYSCON_CLOCK_UART1); // uart1

LPC_SYSCON->UART1CLKDIV = div;

...

}

void Chip_UART2_Init(LPC_UART_T *pUART) ;

{

Chip_Clock_EnablePeriphClock(SYSCON_CLOCK_UART2); // uart2

LPC_SYSCON->UART2CLKDIV = div;

...

}

Thanks a lot!

Re: about LPC 1125 UART1 / UART2

soledad — Thu, 19 Jul 2018 16:02:10 GMT

Hi,

You need to add the SYSCON_CLOCK_UART1 and SYSCON_CLOCK_UART2 defines in clock_112x.h

and double check the UART interrupt handlers there is no uart2

I hope this helps,

Sol

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Re: about LPC 1125 UART1 / UART2