23 lines
615 B
C
23 lines
615 B
C
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#include "stm32f103xb.h"
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#define LED_PIN GPIO_PIN_13
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#define LED_PORT GPIOC
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void delay(uint32_t count) {
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for(uint32_t i = 0; i < count; i++);
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}
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int main(void) {
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RCC->APB2ENR |= RCC_APB2ENR_IOPCEN; // Enable clock for GPIOC
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GPIOC->CRH &= ~(GPIO_CRH_CNF13 | GPIO_CRH_MODE13); // Clear CNF and MODE bits for pin 13
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GPIOC->CRH |= GPIO_CRH_MODE13_0; // Output mode, max speed 10 MHz
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while (1) {
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GPIOC->BSRR = LED_PIN; // Set pin high (turn LED on)
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delay(1000000); // Delay
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GPIOC->BSRR = LED_PIN << 16; // Reset pin (turn LED off)
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delay(1000000); // Delay
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}
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}
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