failed approach

gomspace/libutil/include/gs/util/drivers/gpio/gpio.h

@@ -0,0 +1,91 @@
+#ifndef GS_UTIL_DRIVERS_GPIO_GPIO_H
+#define GS_UTIL_DRIVERS_GPIO_GPIO_H
+/* Copyright (c) 2013-2018 GomSpace A/S. All rights reserved. */
+/**
+    @file
+
+    GPIO interface provides a generic interface toward hardware GPIO's.
+*/
+
+#include <gs/util/error.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+   GPIO definition.
+*/
+typedef struct {
+    //! Chip/group/port number which the GPIO belongs to.
+    uint16_t port;
+    //! The pin number of the GPIO.
+    uint16_t pin;
+} gs_gpio_t;
+
+/**
+   GPIO interrupt function.
+*/
+typedef void (*gs_gpio_isr_t)(gs_context_switch_t * cswitch);
+
+/**
+   Configuration for interrupt related to a GPIO.
+*/
+typedef struct {
+    //! True if it shall trigger on rising edge.
+    bool rising_edge;
+    //! True if it shall trigger on falling edge.
+    bool falling_edge;
+    //! True if it shall have high priority (if nested isr supported).
+    bool high_priority;
+    //! ISR to be called on trigger.
+    gs_gpio_isr_t isr;
+} gs_interrupt_conf_t;
+
+/**
+    GPIO get value
+
+    @param[in] gpio The gpio to read
+    @param[in] value Returned GPIO value (true/false = High/Low)
+    @return_gs_error_t
+*/
+gs_error_t gs_gpio_get(gs_gpio_t gpio, bool *value);
+
+/**
+    GPIO get value without error check
+
+    @param[in] gpio The gpio to read
+    @return GPIO value (true/false = High/Low)
+*/
+bool gs_gpio_get_nc(gs_gpio_t gpio);
+
+/**
+    GPIO set value
+
+    @param[in] gpio The gpio to set
+    @param[in] value GPIO value (true/false = High/Low)
+    @return_gs_error_t
+*/
+gs_error_t gs_gpio_set(gs_gpio_t gpio, bool value);
+
+/**
+    GPIO set value without error check
+
+    @param[in] gpio The gpio to set
+    @param[in] value GPIO value (true/false = High/Low)
+*/
+void gs_gpio_set_nc(gs_gpio_t gpio, bool value);
+
+/**
+    Initialize GPIO as an external interrupt pin.
+
+    @param[in] gpio The gpio to configure
+    @param[in] conf Configuration of interrupt pin
+    @return_gs_error_t
+ */
+gs_error_t gs_gpio_init_as_interrupt(gs_gpio_t gpio, const gs_interrupt_conf_t * conf);
+
+#ifdef __cplusplus
+}
+#endif
+#endif