?? main.c
字號:
/************************************************************/
/* PROJECT NAME: Thumb */
/* Project: LPC2100 Training course */
/* Engineer: T Martin tmartin@hitex.co.uk */
/* Filename: main.c */
/* Language: C */
/* Compiler: Keil ARM V2.00b */
/* Assembler: */
/* */
/************************************************************/
/* COPYRIGHT: Hitex UK Ltd 2004 */
/* LICENSE: THIS VERSION CREATED FOR FREE DISTRIBUTION */
/************************************************************/
/* Function: */
/* */
/* Example Thumb program for LPC2100 */
/* */
/* Demonstrates APCS and ARM - Thumb interworking */
/* */
/* Oscillator frequency 12.000 Mhz */
/* Target board Keil MCB2100 */
/************************************************************/
#include <LPC21xx.H>
void thumb_function(void); //External prototype for thumb function
int main(void) __arm
{
IODIR1 = 0x00FF0000;
while(1)
{
IOCLR1 = 0x00FF0000;
thumb_function(); //Call Thumb function
}
}
void thumb_function(void) __thumb
{
unsigned int i,delay;
for (i = 0x00001000;i < 0x01000000 ;i = i<<1) //LED flasher
{
for (delay = 0;delay<0x010000;delay++) //simple delay loop
{
;
}
IOSET1 = i; //Set the next led
}
}
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