1549 UART

eddiemallon — Wed, 29 Apr 2020 12:13:49 GMT

I am using the MCB1500 board and trying to transmit data from UART0. I am not seeing anything on pin IO2.6 using a scope. The signal is sitting Hi.

The relevant code extracts are listed below.

*****************************************************************************************************************

void LPC1549_init(void) //1549 SWM initialisation
{ /* Enable the clock to the Switch Matrix */
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);

Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 4, (IOCON_MODE_PULLUP | IOCON_DIGMODE_EN));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 5, (IOCON_MODE_PULLUP | IOCON_DIGMODE_EN));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 6, (IOCON_MODE_PULLUP | IOCON_DIGMODE_EN));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 7, (IOCON_MODE_PULLUP | IOCON_DIGMODE_EN));

Chip_IOCON_PinMuxSet(LPC_IOCON, 2, 6, (IOCON_MODE_PULLUP | IOCON_DIGMODE_EN)); //UART0 Tx
Chip_IOCON_PinMuxSet(LPC_IOCON, 2, 7, (IOCON_MODE_PULLUP | IOCON_DIGMODE_EN)); //UARTO Rx

//connect functions to 20w DIN connector MOTOR 1
Chip_SWM_MovablePinAssign(SWM_SPI1_SSELSN_0_IO,4); // /CS PIO0-4 DIN Con pin 2
Chip_SWM_MovablePinAssign(SWM_SPI1_MOSI_IO,5);  // DOUT PIO0-5 DIN Con pin 4
Chip_SWM_MovablePinAssign(SWM_SSP1_MISO_IO,6);  // DIN PIO0-6 DIN Con pin 6
Chip_SWM_MovablePinAssign(SWM_SSP1_SCK_IO,7);  // SCLK PIO0-7 DIN Con pin 8

Chip_SWM_MovablePinAssign(SWM_UART0_TXD_O,71); // UART0 Tx PIO2_6
Chip_SWM_MovablePinAssign(SWM_UART0_RXD_I,72); // UART0 Rx PIO2_7

Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
}

*********************************************************************************************************************

// the following is taken from the LCPopen example

void Serial_init(void) // Setup UART0
{
Chip_UART_Init(LPC_USART0);
Chip_UART_ConfigData(LPC_USART0, UART_CFG_DATALEN_8 | UART_CFG_PARITY_NONE | UART_CFG_STOPLEN_1);
Chip_UART_SetBaud(LPC_USART0,300);
/* Optional for low clock rates only: Chip_UART_SetBaudWithRTC32K(LPC_USART, 300); */
Chip_UART_Enable(LPC_USART0);
Chip_UART_TXEnable(LPC_USART0);

}

void Serial_out(void) // simple tansmit function called from MAIN
{
while
(~LPC_USART0->STAT & UART_STAT_TXRDY)

LPC_USART0 -> TXDATA = 0x66;
}

Regards

Eddie Mallon

Re: 1549 UART

Sebastian_Del_Rio — Mon, 04 May 2020 21:05:38 GMT

Hi Eddie, I hope you're doing well!

I'm sorry for the inconveniences this may cause, but could you please contact Keil Support for help with this development kit?

Take care, best regards,

Sebastian

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