stm32f0: stm32f1: led: initial implementation

include/led.h

@@ -0,0 +1,10 @@
+#pragma once
+
+struct led {
+	uint32_t port;
+	uint32_t pin;
+	int invert;
+};
+
+void led_enable(struct led *led);
+void led_disable(struct led *led);

source/platform/stm32f0/Makefile

@@ -4,6 +4,7 @@ obj-y += source/platform/usart.o
 obj-y += source/platform/stm32f0/alarm.o
 obj-y += source/platform/stm32f0/buzzer.o
 obj-y += source/platform/stm32f0/gpio.o
+obj-y += source/platform/stm32f0/led.o
 obj-y += source/platform/stm32f0/rcc.o
 obj-y += source/platform/stm32f0/rtc.o
 obj-y += source/platform/stm32f0/spi.o

source/platform/stm32f0/led.c

@@ -0,0 +1,31 @@
+#include <libopencm3/stm32/gpio.h>
+
+#include <led.h>
+#include <macros.h>
+
+struct led leds[] = {
+	{ GPIOC, GPIO8, 0 },
+};
+size_t nleds = count_of(leds);
+
+void led_enable(struct led *led)
+{
+	if (!led)
+		return;
+
+	if (led->invert)
+		gpio_clear(led->port, led->pin);
+	else
+		gpio_set(led->port, led->pin);
+}
+
+void led_disable(struct led *led)
+{
+	if (!led)
+		return;
+
+	if (led->invert)
+		gpio_set(led->port, led->pin);
+	else
+		gpio_clear(led->port, led->pin);
+}

source/platform/stm32f1/Makefile

@@ -4,6 +4,7 @@ obj-y += source/platform/usart.o
 obj-y += source/platform/stm32f1/alarm.o
 obj-y += source/platform/stm32f1/buzzer.o
 obj-y += source/platform/stm32f1/gpio.o
+obj-y += source/platform/stm32f1/led.o
 obj-y += source/platform/stm32f1/rcc.o
 obj-y += source/platform/stm32f1/rtc.o
 obj-y += source/platform/stm32f1/spi.o

source/platform/stm32f1/led.c

@@ -0,0 +1,31 @@
+#include <libopencm3/stm32/gpio.h>
+
+#include <led.h>
+#include <macros.h>
+
+struct led leds[] = {
+	{ GPIOB, GPIO0, 1 },
+};
+size_t nleds = count_of(leds);
+
+void led_enable(struct led *led)
+{
+	if (!led)
+		return;
+
+	if (led->invert)
+		gpio_clear(led->port, led->pin);
+	else
+		gpio_set(led->port, led->pin);
+}
+
+void led_disable(struct led *led)
+{
+	if (!led)
+		return;
+
+	if (led->invert)
+		gpio_set(led->port, led->pin);
+	else
+		gpio_clear(led->port, led->pin);
+}