diff --git a/example/Makefile b/example/Makefile
index 23d07e52..0667d670 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -26,7 +26,7 @@ CC		= $(PREFIX)-gcc
 LD		= $(PREFIX)-ld
 OBJCOPY		= $(PREFIX)-objcopy
 OBJDUMP		= $(PREFIX)-objdump
-CFLAGS		= -Os -g -Wall -Wextra -I../include -fno-common \
+CFLAGS		= -O0 -g -Wall -Wextra -I../include -fno-common \
 		  -mcpu=cortex-m3 -mthumb
 LDFLAGS		= -L../lib -T$(BINARY).ld -nostartfiles
 OBJS		= $(BINARY).o
diff --git a/example/blink.c b/example/blink.c
index aa68322a..21ac147b 100644
--- a/example/blink.c
+++ b/example/blink.c
@@ -22,6 +22,26 @@
 
 int main(void)
 {
-	/* TODO */
+	int i;
+
+	/* GPIO setup: Enable GPIOC clock, set GPIO12 to 'output push-pull'. */
+	RCC_APB2ENR = RCC_IOPCEN;
+	GPIOC_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((12 - 8) * 4) + 2));
+	GPIOC_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((12 - 8) * 4));
+
+	/* Blink the LED (PC12) on the board. */
+	while (1) {
+		GPIOC_BSRR = GPIO12;		/* LED off */
+		for (i = 0; i < 80000; i++);	/* Wait (needs -O0 CFLAGS). */
+		GPIOC_BRR = GPIO12;		/* LED on */
+		for (i = 0; i < 80000; i++);	/* Wait (needs -O0 CFLAGS). */
+	}
+
 	return 0;
 }
+
+u32 *vector_table[2] __attribute__ ((section(".vectors"))) = {
+	(u32 *)0x20000800,	/* Use 2 KB stack (0x800 bytes). */
+	(u32 *)main,		/* Use main() as reset vector for now. */
+};
+
diff --git a/example/blink.ld b/example/blink.ld
index c57079c0..07ea842b 100644
--- a/example/blink.ld
+++ b/example/blink.ld
@@ -33,6 +33,7 @@ SECTIONS
 	. = ORIGIN(rom);
 
 	.text : {
+		*(.vectors)	/* Vector table */
 		*(.text)	/* Program code */
 		*(.rodata)	/* Read-only data */
 	} >rom