?? serial.c
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/******************************************************************************/
/* SERIAL.C: Low Level Serial Routines */
/******************************************************************************/
/* This file is part of the uVision/ARM development tools. */
/* Copyright (c) 2005-2007 Keil Software. All rights reserved. */
/* This software may only be used under the terms of a valid, current, */
/* end user licence from KEIL for a compatible version of KEIL software */
/* development tools. Nothing else gives you the right to use this software. */
/******************************************************************************/
#include <LPC23xx.H> /* LPC23xx/LPC24xx definitions */
#define UART1 /* Use UART 1 for printf */
/* If UART 0 is used for printf */
#ifdef UART0
#define UxFDR U0FDR
#define UxLCR U0LCR
#define UxDLL U0DLL
#define UxDLM U0DLM
#define UxLSR U0LSR
#define UxTHR U0THR
#define UxRBR U0RBR
/* If UART 1 is used for printf */
#elif defined(UART1)
#define UxFDR U1FDR
#define UxLCR U1LCR
#define UxDLL U1DLL
#define UxDLM U1DLM
#define UxLSR U1LSR
#define UxTHR U1THR
#define UxRBR U1RBR
#endif
void init_serial (void) { /* Initialize Serial Interface */
#ifdef UART0
PCONP |= (1 << 3); /* Enable UART0 power */
PINSEL0 |= 0x00000050; /* Enable TxD0 and RxD0 */
#elif defined (UART1)
PCONP |= (1 << 4); /* Enable UART1 power */
PINSEL7 |= 0x0000000F; /* Enable TxD1 and RxD1 */
#endif
UxFDR = 0; /* Fractional divider not used */
UxLCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
UxDLL = 94; /* 9600 Baud Rate @ 14.4 MHZ PCLK */
UxDLM = 0; /* High divisor latch = 0 */
UxLCR = 0x03; /* DLAB = 0 */
}
/* Implementation of putchar (also used by printf function to output data) */
int sendchar (int ch) { /* Write character to Serial Port */
while (!(UxLSR & 0x20));
return (UxTHR = ch);
}
int getkey (void) { /* Read character from Serial Port */
while (!(UxLSR & 0x01));
return (UxRBR);
}
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