Rename blink.c to main.c

Makefile

@@ -10,6 +10,8 @@ CC := $(TOOL_PREFIX)-gcc
 OBJDUMP := $(TOOL_PREFIX)-objdump
 OBJCOPY := $(TOOL_PREFIX)-objcopy
 
+SRC := ch32fun.c main.c
+
 CFLAGS = -g \
 		 -Os \
 		 -flto \
@@ -36,7 +38,7 @@ EXTFLAGS := -march=rv32ec \
 
 default: $(TARGET).bin
 
-$(TARGET).elf: ch32fun.c blink.c | ch32v003.ld ch32fun.h ch32v003hw.h
+$(TARGET).elf: $(SRC) | ch32v003.ld ch32fun.h ch32v003hw.h
 	@echo CC $@
 	@$(CC) $(CFLAGS) $(LDFLAGS) $(EXTFLAGS) -o $@ $^
 

blink.c

@@ -1,19 +0,0 @@
-#include "ch32fun.h"
-
-#define LED_PIN PD6
-
-int main() {
-    SystemInit();
-
-    // Enable GPIOs
-    funGpioInitAll();
-
-    funPinMode(LED_PIN, GPIO_Speed_10MHz | GPIO_CNF_OUT_PP);
-
-    while (1) {
-        funDigitalWrite(LED_PIN, FUN_HIGH);
-        Delay_Ms(250);
-        funDigitalWrite(LED_PIN, FUN_LOW);
-        Delay_Ms(250);
-    }
-}

main.c

@@ -0,0 +1,39 @@
+#include <ch32fun.h>
+#include <rsa.h>
+
+#define LED_PIN PD6
+#define FREQ 2
+#define BLINK_DELAY 1000 / FREQ
+
+void exit_blink() {
+    for (int i = 0; i < 4; i++) {
+        funDigitalWrite(LED_PIN, FUN_HIGH);
+        Delay_Ms(50);
+        funDigitalWrite(LED_PIN, FUN_LOW);
+        Delay_Ms(50);
+    }
+
+    while (1){};
+
+    funDigitalWrite(LED_PIN, FUN_HIGH);
+}
+
+int main() {
+    SystemInit();
+
+    // Enable GPIOs
+    funGpioInitAll();
+
+    funPinMode(LED_PIN, GPIO_Speed_10MHz | GPIO_CNF_OUT_PP);
+
+    int i = 0;
+    while (i < gcd(930, 10)) {
+        i++;
+        funDigitalWrite(LED_PIN, FUN_HIGH);
+        Delay_Ms(BLINK_DELAY);
+        funDigitalWrite(LED_PIN, FUN_LOW);
+        Delay_Ms(BLINK_DELAY);
+    }
+
+    exit_blink();
+}