1 files changed, 16 insertions, 0 deletions
diff --git a/io-module/gpio.c b/io-module/gpio.c
index 4a2d963..9e643a4 100644
--- a/io-module/gpio.c
+++ b/io-module/gpio.c
@@ -13,6 +13,22 @@ struct gpio_pin *gpio_pin_by_name(const char *name) {
 	return NULL;
 }
 
+// A GPIO pin number must only occur once.
+struct gpio_pin *gpio_pin_by_num(unsigned num) {
+	int ipin = 0;
+	while(*(gpio_pins[ipin].name)) {
+		if (gpio_pins[ipin].pin.gpio == num) {
+			return &(gpio_pins[ipin]);
+		}
+		ipin++;
+	}
+
+	log_error("pin numbered %u not found", num);
+
+	return NULL;
+}
+
+
 struct gpio_pin *gpio_pin_by_attr_name(const char *name) {
 	struct gpio_pin *pin;