serial.c

lcd interface code for lpc214x series micro controllers

/******************************************************************************/
/*  This file is part of the uVision/ARM development tools                    */
/*  Copyright KEIL ELEKTRONIK GmbH 2002-2004                                  */
/******************************************************************************/
/*                                                                            */
/*  SERIAL.C:  Low Level Serial Routines                                      */
/*                                                                            */
/******************************************************************************/

//#include <LPC21xx.H>                     /* LPC21xx definitions               */
#include "lpc210x.h"
#define CR     0x0D


void init_serial_1 (void)  {               /* Initialize Serial Interface       */
  PINSEL0 = 0x00050000;                  /* Enable RxD1 and TxD1              */ 
  UART1_LCR = 0x83;                      /* 8 bits, no Parity, 1 Stop bit     */
  UART1_DLL = 97;                        /* 9600 Baud Rate @ 15MHz VPB Clock  */
  UART1_LCR = 0x03;                      /* DLAB = 0                          */
}


int putchar_1 (int ch)  {                  /* Write character to Serial Port    */

  if (ch == '\n')  {
    while (!(UART1_LSR & 0x20));
    UART1_THR = CR;                      /* output CR */
  }
  while (!(UART1_LSR & 0x20));
  return (UART1_THR = ch);
}


int getchar_1 (void)  {                    /* Read character from Serial Port   */

  while (!(UART1_LSR & 0x01));

  return (UART1_RBR);
}

//  ****************************


void init_serial_0 (void)  {               /* Initialize Serial Interface       */
  PINSEL0 = 0x00000005;                  /* Enable RxD0 and TxD0              */ 
  UART0_LCR = 0x83;                      /* 8 bits, no Parity, 1 Stop bit     */
  UART0_DLL = 97;                        /* 9600 Baud Rate @ 15MHz VPB Clock  */
  UART0_LCR = 0x03;                      /* DLAB = 0                          */


// defines

// UART_BAUD calculates a division rate given a baud rate
// for use with uart0Init() and uart1Init()
// example: uart0Init(UART_BAUD(115200), UART_8N1, UART_FIFO_8);
//
// BEWARE: additional code will be generated if 'baud' is not a contant
//#define UART_BAUD(baud) (uint16_t)((PCLK+baud*8L)/(baud*16))



	// set the baudrate
//	U0LCR = ULCR_DLAB_ENABLE;             // select divisor latches 
//	U0DLL = (uint8_t)baud;                // set for baud low byte
//	U0DLM = (uint8_t)(baud >> 8);         // set for baud high byte




}


int putchar_0 (int ch)  {                  /* Write character to Serial Port    */

  if (ch == '\n')  {
    while (!(UART0_LSR & 0x20));
    UART0_THR = CR;                      /* output CR */
  }
  while (!(UART0_LSR & 0x20));
  return (UART0_THR = ch);
}


int getchar_0 (void)  {                    /* Read character from Serial Port   */

  while (!(UART0_LSR & 0x01));

  return (UART0_RBR);
}