Diff: src/gpio.cpp

Revision:

8:70fc373a5f46

Child:

9:9e247b9c9abf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gpio.cpp	Wed Feb 26 06:09:13 2020 +0000
@@ -0,0 +1,227 @@
+/***************************************************************************//**
+ *   @file   gpio.cpp
+ *   @brief  Implementation of GPIO No-OS platform driver interfaces
+********************************************************************************
+ * Copyright (c) 2019, 2020 Analog Devices, Inc.
+ *
+ * All rights reserved.
+ *
+ * This software is proprietary to Analog Devices, Inc. and its licensors.
+ * By using this software you agree to the terms of the associated
+ * Analog Devices Software License Agreement.
+*******************************************************************************/
+
+/******************************************************************************/
+/************************ Includes Files *******************************/
+/******************************************************************************/
+#include <stdio.h>
+#include <mbed.h>
+
+#include "platform_drivers.h"
+#include "gpio_extra.h"
+
+/******************************************************************************/
+/************************ Functions Definitions *******************************/
+/******************************************************************************/
+
+/**
+ * @brief Obtain the GPIO decriptor.
+ * @param desc - The GPIO descriptor.
+ * @param gpio_number - The number of the GPIO.
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t gpio_get(struct gpio_desc **desc, const gpio_init_param *param)
+{
+	if (desc) {
+		// Create the gpio description object for the device
+		gpio_desc *new_gpio = (gpio_desc *)malloc(sizeof(gpio_desc));
+		if (new_gpio == NULL) {
+			return FAILURE;
+		}
+
+		new_gpio->number = param->number;
+		*desc = new_gpio;
+
+		return SUCCESS;
+	}
+
+	return FAILURE;
+}
+
+
+/**
+ * @brief Free the resources allocated by gpio_get().
+ * @param desc - The GPIO descriptor.
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t gpio_remove(struct gpio_desc *desc)
+{
+	if (desc) {
+		// Free the gpio object
+		if (((mbed_gpio_desc *)(desc->extra))->gpio_pin) {
+			free(((mbed_gpio_desc *)(desc->extra))->gpio_pin);
+		}
+
+		// Free the gpio extra descriptor object
+		if ((mbed_gpio_desc *)(desc->extra)) {
+			free((mbed_gpio_desc *)(desc->extra));
+		}
+
+		// Free the gpio descriptor object
+		free(desc);
+
+		return SUCCESS;
+	}
+
+	return FAILURE;
+}
+
+
+/**
+ * @brief Enable the input direction of the specified GPIO.
+ * @param desc - The GPIO descriptor.
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t gpio_direction_input(struct gpio_desc *desc)
+{
+	DigitalIn *gpio_input;  	// pointer to gpio input object
+	mbed_gpio_desc *gpio_desc_extra;  // pointer to gpio desc extra parameters
+
+	if (desc) {
+		// Configure and instantiate GPIO pin as input
+		gpio_input = new DigitalIn((PinName)desc->number);
+		if (gpio_input == NULL) {
+			return FAILURE;
+		}
+
+		// Create the gpio extra descriptor object to store new gpio instance
+		gpio_desc_extra = (mbed_gpio_desc *)malloc(sizeof(mbed_gpio_desc));
+		if (gpio_desc_extra == NULL) {
+			return FAILURE;
+		}
+
+		gpio_desc_extra->gpio_pin = (mbed_gpio_desc *)gpio_input;
+		desc->extra = (mbed_gpio_desc *)gpio_desc_extra;
+
+		// Set the gpio pin mode
+		gpio_input->mode((PinMode)((mbed_gpio_init_param *)desc->extra)->pin_mode);
+
+		return SUCCESS;
+	}
+
+	return FAILURE;
+}
+
+
+/**
+ * @brief Enable the output direction of the specified GPIO.
+ * @param desc - The GPIO descriptor.
+ * @param value - The value.
+ *                Example: GPIO_HIGH
+ *                         GPIO_LOW
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t gpio_direction_output(struct gpio_desc *desc, uint8_t value)
+{
+	DigitalOut *gpio_output;   	// pointer to gpio output object
+	mbed_gpio_desc *gpio_desc_extra;  // pointer to gpio desc extra parameters
+
+	if(desc) {
+		// Configure and instantiate GPIO pin as output
+		gpio_output = new DigitalOut((PinName)desc->number);
+		if (gpio_output == NULL) {
+			return FAILURE;
+		}
+
+		// Create the gpio extra descriptor object to store new gpio instance
+		gpio_desc_extra = (mbed_gpio_desc *)malloc(sizeof(mbed_gpio_desc));
+		if (gpio_desc_extra == NULL) {
+			return FAILURE;
+		}
+
+		gpio_desc_extra->gpio_pin = (mbed_gpio_desc *)gpio_output;
+		desc->extra = (mbed_gpio_desc *)gpio_desc_extra;
+
+		return SUCCESS;
+	}
+
+	if (value) {
+		// Unused variable - fix compiler warning
+	}
+
+	return FAILURE;
+}
+
+
+/**
+ * @brief Get the direction of the specified GPIO.
+ * @param desc - The GPIO descriptor.
+ * @param direction - The direction.
+ *                    Example: GPIO_OUT
+ *                             GPIO_IN
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t gpio_get_direction(struct gpio_desc *desc, uint8_t *direction)
+{
+	if (desc) {
+		// Unused variable - fix compiler warning
+	}
+
+	if (direction) {
+		// Unused variable - fix compiler warning
+	}
+
+	return SUCCESS;
+}
+
+
+/**
+ * @brief Set the value of the specified GPIO.
+ * @param desc - The GPIO descriptor.
+ * @param value - The value.
+ *                Example: GPIO_HIGH
+ *                         GPIO_LOW
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t gpio_set_value(struct gpio_desc *desc, uint8_t value)
+{
+	DigitalOut *gpio_output;		// pointer to gpio output object
+
+	if (desc) {
+		gpio_output = (DigitalOut *)((mbed_gpio_desc *)desc->extra)->gpio_pin;
+		gpio_output->write(value);
+
+		return SUCCESS;
+	}
+
+	if (value) {
+		// Unused variable - fix compiler warning
+	}
+
+	return FAILURE;
+}
+
+
+/**
+ * @brief Get the value of the specified GPIO.
+ * @param desc - The GPIO descriptor.
+ * @param value - The value.
+ *                Example: GPIO_HIGH
+ *                         GPIO_LOW
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t gpio_get_value(struct gpio_desc *desc, uint8_t *value)
+{
+	DigitalIn *gpio_input;   	// pointer to gpio input object
+	uint8_t returnVal = FAILURE;
+
+	if (desc) {
+		gpio_input = (DigitalIn *)((mbed_gpio_desc *)desc->extra)->gpio_pin;
+		*value = (uint8_t)gpio_input->read();
+		returnVal = gpio_input->is_connected() ? SUCCESS : FAILURE;
+
+		return returnVal;
+	}
+
+	return FAILURE;
+}