1 files changed, 47 insertions, 0 deletions
diff --git a/gpio_blink/main.c b/gpio_blink/main.c
new file mode 100644
index 0000000..7a5290f
--- /dev/null
+++ b/gpio_blink/main.c
@@ -0,0 +1,47 @@
+
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+
+#define DELAY 1000000
+
+
+void clock_init(void);
+void gpio_init(void);
+void delay(void);
+
+
+int main(void)
+{
+	clock_init();
+	gpio_init();
+
+	while(1){
+		gpio_toggle(GPIOC, GPIO13);
+		delay();
+	}
+
+	return 0;
+}
+
+
+void clock_init(void)
+{
+	rcc_periph_clock_enable(RCC_GPIOC);  // for PC13 blinking
+}
+
+
+void gpio_init(void)
+{
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+	gpio_set(GPIOC, GPIO13);
+}
+
+
+void delay(void)
+{
+	for (int i = 0; i < DELAY; i++) {
+		__asm__("nop");
+	}
+}