util.c

嵌入式系统启动代码

#include "util.h"

void UTIL_OnD19()
{
	unsigned int value;
	value = *UTIL_BCR_ADDR;
	value &= 0xffff;
	value |= UTIL_BCR_REDLED_D19_MASK;
	*UTIL_BCR_ADDR = value;
	return;
}

void UTIL_OnD20()
{
	unsigned int value;
	value = *UTIL_BCR_ADDR;
	value &= 0xffff;
	value |= UTIL_BCR_GRNLED_D20_MASK;
	*UTIL_BCR_ADDR = value;
	return;
}

void UTIL_OffD19()
{
	unsigned int value;
	value = *UTIL_BCR_ADDR;
	value &= ~UTIL_BCR_REDLED_D19_MASK;
	value &= 0xffff;
	*UTIL_BCR_ADDR = value;
	return;
}
void UTIL_OffD20()
{
	unsigned int value;
	value = *UTIL_BCR_ADDR;
	value &= ~UTIL_BCR_GRNLED_D20_MASK;
	value &= 0xffff;
	*UTIL_BCR_ADDR = value;
	return;
}
void UTIL_Delay(int time)
{
	int i,j;
	for(i=0;i<time;i++)
		for(j=0;j<100000;j++);
}
void UTIL_TestCpldLed()
{
	int time;
	
	time = 30;
	
	UTIL_OnD19();
	UTIL_Delay(time);
	UTIL_OnD20();
	UTIL_Delay(time);
	UTIL_OffD19();
	UTIL_Delay(time);
	UTIL_OffD20();
	UTIL_Delay(time);

}