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basic.c
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basic.c
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void delay_1us(void) //1us延时函数，不能连续调用，
{
asm("nop"); //1时钟周期
asm("nop");
asm("nop");
asm("nop");
asm("nop"); //1T
asm("nop");
}
void delay_3us(void) //3us延时函数,,可重复调用不影响精度
{
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
}
void delay_10us(void) //10us延时函数,,可重复调用不影响精度
{
delay_3us();
delay_3us();
delay_3us();
}
void delay_50us(void) //48us延时函数,,可重复调用不影响精度
{
delay_10us();
delay_10us();
delay_10us();
delay_10us();
}
void delay_100us(void) //exactly 98us延时函数,,可重复调用不影响精度
{
delay_50us();
delay_50us();
}
void delay_n100us(unsigned char n100us)
{
while(n100us--)
delay_100us();
}
void delay_1ms(void)
{
delay_100us();
delay_100us();
delay_100us();
delay_100us();
delay_100us();
delay_100us();
delay_100us();
delay_100us();
delay_100us();
delay_100us();
}
void delay_nms(unsigned int nms)
{
while(nms--)
delay_1ms();
}