Diff: CN0397.h

Revision:

0:61b289f9bab0

Child:

1:77eb0888c15a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CN0397.h	Mon Nov 07 15:57:44 2016 +0000
@@ -0,0 +1,173 @@
+/**
+*   @file     CN0397.cpp
+*   @brief    Header file for the CN0397
+*   @author   Analog Devices Inc.
+*
+* For support please go to:
+* Github: https://github.com/analogdevicesinc/mbed-adi
+* Support: https://ez.analog.com/community/linux-device-drivers/microcontroller-no-os-drivers
+* Product: www.analog.com/EVAL-CN0397-ARDZ
+* More: https://wiki.analog.com/resources/tools-software/mbed-drivers-all
+
+********************************************************************************
+* Copyright 2016(c) Analog Devices, Inc.
+*
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are met:
+*  - Redistributions of source code must retain the above copyright
+*    notice, this list of conditions and the following disclaimer.
+*  - Redistributions in binary form must reproduce the above copyright
+*    notice, this list of conditions and the following disclaimer in
+*    the documentation and/or other materials provided with the
+*    distribution.
+*  - Neither the name of Analog Devices, Inc. nor the names of its
+*    contributors may be used to endorse or promote products derived
+*    from this software without specific prior written permission.
+*  - The use of this software may or may not infringe the patent rights
+*    of one or more patent holders.  This license does not release you
+*    from the requirement that you obtain separate licenses from these
+*    patent holders to use this software.
+*  - Use of the software either in source or binary form, must be run
+*    on or directly connected to an Analog Devices Inc. component.
+*
+* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
+* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+* IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+* LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
+* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+********************************************************************************/
+
+#ifndef CN0397_H_
+#define CN0397_H_
+
+#include <stdio.h>
+#include <string.h>
+#include "AD7798.h"
+
+#define REGISTERS_VALUES     3
+#define CONVERSION_DATA      4
+
+#define V_REF                3150.0    // [mV]
+#define _2_16                65535.0   // 2^16
+
+
+/* Available settings:
+ * AD7798_CH_AIN1P_AIN1M - select channel 1
+ * AD7798_CH_AIN2P_AIN2M - select channel 2
+ * AD7798_CH_AIN3P_AIN3M - select channel 3
+ */
+#define ADC_CHANNEL   AD7798_CH_AIN2P_AIN2M
+
+/* Available settings:
+ *  AD7798_GAIN_1, AD7798_GAIN_2,
+ *  AD7798_GAIN_4, AD7798_GAIN_8,
+ *  AD7798_GAIN_16, AD7798_GAIN_32,
+ *  AD7798_GAIN_64, AD7798_GAIN_128
+ */
+#define ADC_GAIN      AD7798_GAIN_1
+/* Available settings:
+ * Check available value from datasheet
+ */
+#define ADC_SPS        0x05  /*50SPS*/
+
+
+/* Available settings:
+ * How often to display output values on terminal -> msec
+ */
+#define DISPLAY_REFRESH        1000   /*[msec]*/
+
+#define CHANNELS  3
+
+
+#define USE_CALIBRATION      /* Select if you want to use system zero-scale calibration before reading the system data*/
+/**
+ * Helper function used to flush the serial interface
+ */
+void flush_serial();
+
+/**
+ * @brief The CN0397 shield class
+ */
+class CN0397
+{
+public:
+	/**
+	 * @brief The CN0397 class constructor
+	 */
+    CN0397(PinName cs);
+    /**
+     * @brief Initialization method of the class. Initializes the AD7798 and initiates calibration if needed
+     */
+    void init(void);
+
+    /**
+     * @brief Displays data on the serial interface
+     */
+    void display_data(void);
+
+    /**
+     * @brief Converts ADC counts to voltage
+     * @param adcValue - ADC counts
+     * @param voltage - computed voltage
+     */
+    void data_to_voltage(uint16_t adcValue, float *voltage);
+
+    /**
+     * @brief Computes light intensity of the channel
+     * @param channel - channel to be converted
+     * @param adcValue - ADC counts
+     * @param intensity - computed light intensity
+     */
+    void calc_light_intensity(uint8_t channel, uint16_t adcValue, float *intensity);
+
+    /**
+     * @brief Computes light concentration from light intensity
+     * @param channel - channel to be converted
+     * @param intensity - light intensity
+     * @param conc - computed light concentration
+     */
+    void calc_light_concentration(uint8_t channel, float intensity, float *conc);
+
+    /**
+     * @brief Reads the ADC channels and computes intensity and concentration
+     */
+    void set_app_data(void);
+
+    /**
+     * @brief Calibrates the channel
+     * @param channel - channel to be calibrated
+     */
+    void calibration(uint8_t channel);
+
+    /**
+     * @brief Instance of the AD7798
+     */
+    AD7798 ad7798;
+private:
+
+    uint8_t statusReg, idReg, ioReg, gainAdc;
+    uint16_t modeReg, configReg, offsetReg, fullscaleReg, dataReg;
+    uint16_t adcValue[3];
+    float voltageValue[3], intensityValue[3], lightConcentration[3];
+    const uint8_t Channels[3] = { 1, 0, 2};
+    const char colour[3][6] = {
+        "RED", "GREEN", "BLUE",
+    };
+
+    const uint8_t ColorPrint[3] = { 31, 32, 34 };
+    const uint8_t Gain[8] = { 1, 2, 4, 8, 16, 32, 64, 128};
+    const float Lux_LSB[3] = {2.122, 2.124, 2.113};
+    const float Optimal_Levels[3] = {26909.0, 8880.0, 26909.0};
+
+};
+
+#endif /* CN0397_H_ */
+