Diff: app/src/ad7606_support.c

Revision:

0:3afcd581558d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/ad7606_support.c	Thu Jan 14 18:54:16 2021 +0530
@@ -0,0 +1,85 @@
+/*************************************************************************//**
+ *   @file   ad7606_support.c
+ *   @brief  AD7606 device No-OS driver supports
+******************************************************************************
+* Copyright (c) 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.
+*****************************************************************************/
+
+/******************************************************************************/
+/***************************** Include Files **********************************/
+/******************************************************************************/
+
+#include <stdint.h>
+#include "app_config.h"
+#include "ad7606_support.h"
+#include "ad7606_data_capture.h"
+
+/******************************************************************************/
+/********************** Macros and Constants Definition ***********************/
+/******************************************************************************/
+
+/******************************************************************************/
+/********************** Variables and User Defined Data Types *****************/
+/******************************************************************************/
+
+/******************************************************************************/
+/************************ Functions Definitions *******************************/
+/******************************************************************************/
+
+/*!
+ * @brief	Function to convert adc raw data into equivalent voltage
+ * @param	adc_raw[in] - ADC raw data
+ * @param	scale[in] - ADC raw to voltage conversion scale
+ * @return	equivalent voltage
+ */
+float convert_adc_raw_to_voltage(int32_t adc_raw, float scale)
+{
+	float voltage;
+
+	/* Convert adc data into equivalent voltage.
+	 * scale = (chn_range / MAX_ADC_CNT * 1000) as defined in iio_ad7606.c
+	 * */
+	voltage = (adc_raw  * (scale / 1000));
+
+	return voltage;
+}
+
+
+/*!
+ * @brief	Function to get the polarity of analog input
+ * @param	chn_range_bits[in] - Bits from the channel range register
+ * @return	UNIPOLAR or BIPOLAR
+ */
+polarity_e ad7606_get_input_polarity(uint8_t chn_range_bits)
+{
+	polarity_e polarity;
+
+	if (chn_range_bits >= AD7606C_UNIPOLAR_RANGE_MIN
+	    && chn_range_bits <= AD7606C_UNIPOLAR_RANGE_MAX) {
+		polarity = UNIPOLAR;
+	} else {
+		polarity = BIPOLAR;
+	}
+
+	return polarity;
+}
+
+
+/*!
+ * @brief	Read the num_of_bytes from previous conversion
+ * @param	dev[in]- Device instance
+ * @param	num_of_bytes[in] - Number of bytes to read from previous conversion
+ * @return	SUCCESS in case of success, FAILURE otherwise
+ */
+int32_t ad7606_read_conversion_data(struct ad7606_dev *dev,
+				    uint8_t num_of_bytes)
+{
+	memset(dev->data, 0, sizeof(dev->data));
+	return spi_write_and_read(dev->spi_desc, dev->data, num_of_bytes);
+}