stm32f407 delay problem

[bnymntrz]

Hi, I am using the stm32f407 card and I am developing keilda software but when I compile it does not fail but the delay does not work and I would be glad if you could help what could be the reason.

[S.Ma]

Please elaborate, some of us aren't telepaths.

[Tesla DeLorean]

Compilers detect syntax errors, not logic errors.

[bnymntrz]

I'm sorry I have to write on the line of code, but when I write to the answer block, it wipes out what I write. Thank you for writing my question, but the delay doesn't do the job. I know that the compiler only extracts the syntax error, but when I load the program, I don't get the pending wait.

[Tesla DeLorean]

Ok, but in order to understand the issue I'd need to actually see some code..

What OS/Browser are you using?

[bnymntrz]

#include "stm32f4xx.h"                  // Device header
#include "stm32f4xx_gpio.h"             // Keil::Device:StdPeriph Drivers:GPIO
#include "stm32f4xx_rcc.h"              // Keil::Device:StdPeriph Drivers:RCC                             
#include "RTE_Device.h"                 // Keil::Device:Startup
 
 
 
 
 
 
 
 
 
void delay(uint32_t time){
	
 	while(time>0){
	time--;
	}
}
 
	int main(){
		
	                            GPIO_InitTypeDef APORT;
                              GPIO_InitTypeDef DPORT;
	                           
                         
	                        
		        
	
	      
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD,ENABLE);
      
	    
	
	      DPORT.GPIO_Mode = GPIO_Mode_OUT;
	      DPORT.GPIO_OType = GPIO_OType_PP;
	      DPORT.GPIO_Pin = GPIO_Pin_All;
	      DPORT.GPIO_PuPd = GPIO_PuPd_NOPULL;
	      DPORT.GPIO_Speed = GPIO_Speed_100MHz;
	      GPIO_Init(GPIOD,&DPORT);
		
	      APORT.GPIO_Mode = GPIO_Mode_OUT;
	      APORT.GPIO_OType = GPIO_OType_PP;
	      APORT.GPIO_Pin = GPIO_Pin_8| GPIO_Pin_9;
	      APORT.GPIO_PuPd = GPIO_PuPd_NOPULL;
	      APORT.GPIO_Speed = GPIO_Speed_100MHz;
	      GPIO_Init(GPIOA,&APORT);
 
     
 
	         
          while(1)
 
					
            {
							
					  GPIO_SetBits(GPIOD, GPIO_Pin_12);
	          delay(20000);
             	 GPIO_ResetBits(GPIOD, GPIO_Pin_12);
						}
	
 
 
 
 
I am using win10 as the operating system.
most simply I've run this code for trial purposes but the delay is not working.

[S.Ma]

The compiler will simplify your code and remove things detected as useless. Add an asm("nop;"); in your loop, or disable the compiler optimisations...