• State Suggested Answer
  • Locked Locked
  • Replies 5 replies
  • Answers 2 answers
  • Subscribers 26 subscribers
  • Views 3290 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Check this Code for Stm32f407, Just bilnking the led4 , it is not blinking led

SrihariReddy

#include "stm32f4xx.h"

void delay_ms(uint16_t dly)
{
uint32_t f;
for(;dly>0;dly--)
{
for(f=250;f>0;f--);
for(f=250;f>0;f--);
}
}

GPIO_InitTypeDef GPIO_InitStruct;
int main()
{

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOD,&GPIO_InitStruct);

GPIO_SetBits(GPIOD,GPIO_Pin_4);

while(1)
{
GPIO_SetBits(GPIOD,GPIO_Pin_4);
delay_ms(1000);

GPIO_ResetBits(GPIOD,GPIO_Pin_4);
delay_ms(1000);

}
}

Parents
  • 0

    Studying the blinky examples is excellent advice. You should also reconsider how to implement delay_ms(). I suspect that an argument of 1000 is really giving you a delay of under 20ms (in which case the LED might appear to be on all the time, if a little dim, because it's blinking very quickly). Did you try setting a breakpoint in your while() loop to see if the LED is blinking at all?

Reply
  • 0

    Studying the blinky examples is excellent advice. You should also reconsider how to implement delay_ms(). I suspect that an argument of 1000 is really giving you a delay of under 20ms (in which case the LED might appear to be on all the time, if a little dim, because it's blinking very quickly). Did you try setting a breakpoint in your while() loop to see if the LED is blinking at all?

Children
No data