Diff: ain.cpp

Revision:

19:ed7c2dac92bd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ain.cpp	Mon Sep 27 04:22:15 2021 +0000
@@ -0,0 +1,167 @@
+/***************************************************************************//**
+ *   @file   ain.cpp
+ *   @brief  Implementation of mbed specific analog input functionality
+********************************************************************************
+ * Copyright (c) 2021 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.
+*******************************************************************************/
+
+/******************************************************************************/
+/***************************** Include Files **********************************/
+/******************************************************************************/
+#include <mbed.h>
+
+// Platform drivers needs to be C-compatible to work with other drivers
+#ifdef __cplusplus
+extern "C"
+{
+#endif //  _cplusplus
+#include "ain.h"
+#include "mbed_ain_aout_extra.h"
+#include "error.h"
+
+/******************************************************************************/
+/********************** Variables and User defined data types *****************/
+/******************************************************************************/
+
+/******************************************************************************/
+/************************ Functions Declarations ******************************/
+/******************************************************************************/
+
+/******************************************************************************/
+/************************ Functions Definitions *******************************/
+/******************************************************************************/
+/**
+ * @brief Read voltage from analog input pin
+ * @param desc[in] - Analog input descriptor
+ * @param value[out] - Buffer to pass analog reading.
+ * @return SUCCESS in case of success, FAILURE otherwise
+ */
+int32_t ain_get_voltage(struct ain_desc *desc, float *value)
+{
+	/* Pointer to analog input object */
+	mbed::AnalogIn *analog_input;
+
+	if (desc && desc->extra) {
+		analog_input = (AnalogIn *)((mbed_analog_in_desc *)
+					    desc->extra)->analog_in_obj;
+		*value = analog_input->read_voltage();
+
+		return SUCCESS;
+	}
+	return FAILURE;
+}
+
+/**
+ * @brief Initialize the Analog Input Pin
+ * @param desc[in, out] - Analog input descriptor structure
+ * @param param[in] - Structure that contains analog input
+ *                    initialization parameters
+ * @return SUCCESS in case of success, FAILURE otherwise
+ */
+int32_t ain_init(struct ain_desc **desc,
+		 const struct ain_init_param *param)
+{
+	mbed::AnalogIn *analog_input;
+	struct ain_desc *new_analog_in_desc;
+	struct mbed_analog_in_desc *new_mbed_analog_in_desc;
+
+	if (!desc || !param ) {
+		return FAILURE;
+	}
+
+	/* Allocate memory for general analog input descriptor */
+	new_analog_in_desc = (ain_desc *)malloc(sizeof(ain_desc));
+	if (!new_analog_in_desc) {
+		goto err_new_in_desc;
+	}
+
+	/* Configure pin number and reference voltage*/
+	new_analog_in_desc->number = param->number;
+	new_analog_in_desc->vref = param->vref;
+
+	/* Allocate memory for mbed specific analog input descriptor
+	 * for future use */
+	new_mbed_analog_in_desc = (mbed_analog_in_desc *)malloc(sizeof(
+					  mbed_analog_in_desc));
+	if (!new_mbed_analog_in_desc) {
+		goto err_mbed_analog_in_desc;
+	}
+
+	/* Create and initialize mbed analog input object */
+	analog_input = new AnalogIn((PinName)param->number, param->vref);
+	if (analog_input) {
+		new_mbed_analog_in_desc->analog_in_obj = analog_input;
+	}
+
+	else {
+		goto err_analog_in_instance;
+	}
+
+	new_analog_in_desc->extra = (mbed_analog_in_desc *)new_mbed_analog_in_desc;
+
+	*desc = new_analog_in_desc;
+	return SUCCESS;
+
+err_analog_in_instance:
+	free(new_mbed_analog_in_desc);
+err_mbed_analog_in_desc:
+	free(new_analog_in_desc);
+err_new_in_desc:
+	// Nothing to free
+
+	return FAILURE;
+}
+
+/**
+ * @brief Deallocate resources allocated by ain_init()
+ * @param desc[in, out] - Analog input descriptor
+ * @return SUCCESS in case of success, FAILURE otherwise.
+ */
+int32_t ain_remove(struct ain_desc *desc)
+{
+	if (desc) {
+
+		if (((mbed_analog_in_desc *)desc->extra)->analog_in_obj) {
+			delete((mbed::AnalogIn *)((mbed_analog_in_desc *)desc->
+						  extra)->analog_in_obj);
+		}
+
+		if ((mbed_analog_in_desc *)desc->extra) {
+			free((mbed_analog_in_desc *)desc->extra);
+		}
+
+		if (((mbed_analog_in_desc *)desc->extra)->analog_in_obj) {
+			delete((mbed::AnalogOut *)((mbed_analog_in_desc *)
+						   desc->extra)->analog_in_obj);
+		}
+
+		if ((mbed_analog_in_desc *)desc->extra) {
+			free((mbed_analog_in_desc *)desc->extra);
+		}
+
+		free(desc);
+
+		return SUCCESS;
+	}
+
+	return FAILURE;
+}
+
+/**
+ * @brief Mbed specific analog input platform ops structure
+ */
+const struct ain_platform_ops mbed_ain_ops = {
+	.init = &ain_init,
+	.read = &ain_get_voltage,
+	.remove = &ain_remove
+};
+
+// Platform drivers needs to be C-compatible to work with other drivers
+#ifdef __cplusplus
+}
+#endif //  _cplusplus