IAR for STM8 exact delay function __delay

"Finishing" 61ic.com
"Provider" llz77
"Detailed description" IAR for STM8 exact delay function

With the IAR for STM8, there is a project to accurately know the number of delay line delay time is how many, the Internet search under unexpectedly did not, and found that a lot of people ask how such a function, I use oscilloscope measurement to do a precise delay function, to share with you friends. The clock start function (16M crystal oscillator) is

void Clkinit (void) 
{ 
    Clk_eckr |=0x1;         Open the external clock while  
    (!) ( clk_eckr&0x2)); Wait for the external clock rdy  
    CLK_CKDIVR &= 0xf8;     CPU No frequency Division 16M 
    CLK_SWR = 0xb4;         Select the external clock while  
    (!) ( clk_swcr&0x8)); 
    CLK_SWCR |=0x2;         Enable external clock 
delay function 
//---  microsecond delay-------------------------- 
void Delayus (void) 
{  
    ASM ("NOP"); An ASM ("NOP") function is tested by an oscilloscope to represent 
    the 100ns asm ("NOP"); 
    ASM ("NOP"); 
    ASM ("NOP");  
} 

----Millisecond delay program----------------------- 
void delayms (unsigned int time) 
{ 
    unsigned int i; 
    while (time--) for   
    (i=900;i>0;i--) 
    Delayus ();  
} 

I hope it works for everyone.

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