pio: add bluepill blink.

2018-12-31 09:00:46 -08:00
parent ef5e3dc7fd
commit 87f936d7b5
6 changed files with 128 additions and 0 deletions
--- a/pio/bluepill/blink/src/blinky.c
+++ b/pio/bluepill/blink/src/blinky.c
@@ -0,0 +1,14 @@
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+int main(void) {
+    rcc_periph_clock_enable(RCC_GPIOC);
+    gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+
+    while(1) {
+        gpio_set(GPIOC, GPIO13);
+        for (int i = 0; i < 1000000; ++i) __asm__("nop");
+        gpio_clear(GPIOC, GPIO13);
+        for (int i = 0; i <  500000; ++i) __asm__("nop");
+    }
+}