main.c File Reference

#include <stdint.h>

Include dependency graph for main.c:

Macros
#define	RCC_AHB1ENR   (*(volatile uint32_t*)0x40023830)
	< Include for uint32_t, optional if using std types
#define	GPIOA_MODER   (*(volatile uint32_t*)0x40020000)
	GPIOA mode register.
#define	GPIOA_ODR   (*(volatile uint32_t*)0x40020014)
	GPIOA output data register.

Functions
void	delay (void)
	Simple delay loop.
int	main (void)
	Main entry point.

Macro Definition Documentation

GPIOA_MODER

#define GPIOA_MODER   (*(volatile uint32_t*)0x40020000)

GPIOA mode register.

Address: 0x40020000
MODER5 (bits 11:10) control mode of PA5

GPIOA_ODR

#define GPIOA_ODR   (*(volatile uint32_t*)0x40020014)

GPIOA output data register.

Address: 0x40020014
Bit 5 controls the output level of PA5

RCC_AHB1ENR

#define RCC_AHB1ENR   (*(volatile uint32_t*)0x40023830)

< Include for uint32_t, optional if using std types

RCC AHB1 peripheral clock enable register

Address: 0x40023830
Bit 0: GPIOAEN - Enable clock for GPIOA

Function Documentation

delay()

void delay

(

void

)

Simple delay loop.

A crude delay function using a for loop. Not precise; use timers for accurate delays.

main()

int main

(

void

)

Main entry point.

Initializes GPIOA pin 5 as output and toggles it in an infinite loop. Typically connected to an LED (e.g., onboard LED on Nucleo boards).