Add gpio_deinit (#793)
diff --git a/src/rp2_common/hardware_gpio/gpio.c b/src/rp2_common/hardware_gpio/gpio.c
index 2816b97..4197a4b 100644
--- a/src/rp2_common/hardware_gpio/gpio.c
+++ b/src/rp2_common/hardware_gpio/gpio.c
@@ -217,6 +217,10 @@
gpio_set_function(gpio, GPIO_FUNC_SIO);
}
+void gpio_deinit(uint gpio) {
+ gpio_set_function(gpio, GPIO_FUNC_NULL);
+}
+
void gpio_init_mask(uint gpio_mask) {
for(uint i=0;i<32;i++) {
if (gpio_mask & 1) {
diff --git a/src/rp2_common/hardware_gpio/include/hardware/gpio.h b/src/rp2_common/hardware_gpio/include/hardware/gpio.h
index 7037e85..4449d50 100644
--- a/src/rp2_common/hardware_gpio/include/hardware/gpio.h
+++ b/src/rp2_common/hardware_gpio/include/hardware/gpio.h
@@ -414,6 +414,13 @@
*/
void gpio_init(uint gpio);
+/*! \brief Resets a GPIO back to the NULL function, i.e. disables it.
+ * \ingroup hardware_gpio
+ *
+ * \param gpio GPIO number
+ */
+void gpio_deinit(uint gpio);
+
/*! \brief Initialise multiple GPIOs (enabled I/O and set func to GPIO_FUNC_SIO)
* \ingroup hardware_gpio
*
