?? blinky.c
字號:
/******************************************************************************/
/* This file is part of the uVision/ARM development tools */
/* Copyright KEIL ELEKTRONIK GmbH 2002-2004 */
/******************************************************************************/
/* */
/* BLINKY.C: LED Flasher */
/* */
/******************************************************************************/
#include <LPC22XX.H> /* LPC22XX Peripheral Registers */
unsigned long counter _at_ 0x81000000; /* Counter Variable in ExtMem */
extern long volatile timeval;
void wait (void) { /* wait function */
unsigned long i;
i = timeval;
while ((timeval - i) != 10); /* wait 100ms */
}
extern void init_timer (void);
int main (void) {
init_timer(); /* Initialize Timer */
IODIR0 = 0x00000100; /* P0.8 defined as Output */
while (1) { /* Loop forever */
IOCLR0 = 0x00000100; /* Turn LED On (P0.8 = 0) */
wait(); /* Wait */
IOSET0 = 0x00000100; /* Turn LED Off (P0.8 = 1) */
wait(); /* Wait */
counter++; /* Increment Counter */
}
}
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