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#include "stm32f4xx.h" /* * definice maker, ktera se budou pouzivat pro praci s 32b registrem STM32F4xx */ #define setbit(reg, bit) ((reg) |= (1U << (bit))) #define clearbit(reg, bit) ((reg) &= (~(1U << (bit)))) #define togglebit(reg, bit) ((reg) ^= (1U << (bit))) #define getbit(reg, bit) ((reg & (1U << bit)) >> bit) void EXTI15_10_IRQHandler() { /* zmenit PR (pending interrupt) na 1, pokud je 0 */ setbit(EXTI->PR, 13); /* zmena stavu LED na desce */ togglebit(GPIOA->ODR, 5); } void buttonConfig(void) { setbit(RCC->AHB1ENR, 2); /* RCC->AHB1ENR |= 0x05; -- konfigurace dvou bran najednou */ setbit(GPIOC->PUPDR, 26); /* nastaveni hodin systemove sbernice */ setbit(RCC->APB2ENR, 14); /* nastaveni masky */ setbit(EXTI->IMR, 13); /* nastaveni smyslu spousteni preruseni - falling, rising */ setbit(EXTI->FTSR, 13); /* konfigiurace brany PC13 */ setbit(SYSCFG->EXTICR[3], 5); /* povoleni preruseni */ NVIC_EnableIRQ(EXTI15_10_IRQn); // 40 ~ EXTI15_10_IRQn /* ekvivalentni zapis */ setbit(NVIC->ISER[40/32], 40%32); } void ledConfig() { /* minimalni konfigurace, kompletni konfigurace viz uloha 1 */ setbit(RCC->AHB1ENR, 0); setbit(GPIOA->MODER, 10); } int main(void) { ledConfig(); buttonConfig(); while (1) { /* * */ } }