Diff: GroveColourSensor.hpp

Revision:

0:21e183c9ef81

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GroveColourSensor.hpp	Sun Apr 24 15:43:51 2016 +0000
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+#ifndef __GROVE_COLOUR_SENSOR_HPP__
+#define __GROVE_COLOUR_SENSOR_HPP__
+ 
+#include "mbed.h"
+ 
+/**
+ * This module is based on the color sensor TCS3414CS with digital output over I2C.
+ * http://www.seeedstudio.com/wiki/index.php?title=Twig_-_I2C_Color_Sensor_v0.9b
+ */
+#ifndef COLOR_H
+#define COLOR_H
+#include "Color.h"
+#endif
+
+class GroveColourSensor {
+public:
+ 
+    // Constructeur qui initialise la connexion I2C
+    GroveColourSensor(PinName sda, PinName scl) : m_i2c(sda, scl) {
+        /* empty*/
+    }
+ 
+    // Méthode pour allumer le capteur
+    void powerUp(void) {
+        static const char powerUpCommand[] = {0x80, 0x03};
+        if (m_i2c.write((SEVEN_BIT_ADDRESS << 1), powerUpCommand, sizeof(powerUpCommand)) != 0) {
+            std::cerr << "failed to power up the sensor" << std::endl;
+        }
+    }
+    
+    // Méthode pour éteindre le capteur
+    void powerDown(void) {
+        static const char powerDownCommand[] = {0x80, 0x00};
+        /* turn down the color sensor */
+        if (m_i2c.write((SEVEN_BIT_ADDRESS << 1), powerDownCommand, sizeof(powerDownCommand)) != 0) {
+            std::cerr << "failed to power down the sensor" << std::endl;
+        }
+    }
+
+    // Méthode permettant de récupérer la valeur d'une couleur en donnant en paramètre une couleur de l'enum Colour_t 
+    uint16_t readColour(Colour_t colour) {
+        char readColorRegistersCommand = 0xb0 + (2 * static_cast<unsigned>(colour));
+        m_i2c.write((SEVEN_BIT_ADDRESS << 1), &readColorRegistersCommand, 1 /* size */);
+ 
+        uint16_t colourValue;
+        m_i2c.read((SEVEN_BIT_ADDRESS << 1), reinterpret_cast<char *>(&colourValue), sizeof(uint16_t));
+        return colourValue;
+    }
+ 
+    // Méthode permettant de récupérer la valeur d'une couleur en donnant en paramètre le numéro de la couleur dans l'énum 
+    uint16_t readColour(unsigned colour) {
+        if (colour >= NUM_COLORS) {
+            return 0;
+        } 
+        return readColour(static_cast<Colour_t>(colour));
+    }
+
+    // Méthode permettant de récupérer les trois couleurs en donnant en paramètre une structure RGB (par référence)
+    void readColours(RGB &rgb) {
+        rgb.red= readColour(RED);
+        rgb.blue= readColour(BLUE);
+        rgb.green= readColour(GREEN);
+    }
+ 
+private:
+    static const uint8_t SEVEN_BIT_ADDRESS = 0x39;
+    I2C m_i2c;
+};
+#endif /* #ifndef __GROVE_COLOUR_SENSOR_HPP__ */