Diff: main.cpp

Revision:

0:139238e5829c

diff -r 000000000000 -r 139238e5829c main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat May 09 08:27:06 2015 +0000
@@ -0,0 +1,81 @@
+// Example program connecting to the TCS34725 Color Sensor to the K64F using I2C
+
+#include "mbed.h"
+
+I2C i2c(I2C_SDA, I2C_SCL); //pins for I2C communication (SDA, SCL)
+Serial pc(USBTX, USBRX);
+
+int sensor_addr = 41 << 1;
+
+DigitalOut green(LED_GREEN);
+
+int main() {
+    pc.baud(9600);
+    green = 1; // off
+    
+    // Connect to the Color sensor and verify whether we connected to the correct sensor. 
+    
+    i2c.frequency(200000);
+    
+    char id_regval[1] = {146};
+    char data[1] = {0};
+    i2c.write(sensor_addr,id_regval,1, true);
+    i2c.read(sensor_addr,data,1,false);
+    
+    if (data[0]==68) {
+        green = 0;
+        wait (2); 
+        green = 1;
+        } else {
+        green = 1; 
+    }
+    
+    // Initialize color sensor
+    
+    char timing_register[2] = {129,0};
+    i2c.write(sensor_addr,timing_register,2,false);
+    
+    char control_register[2] = {143,0};
+    i2c.write(sensor_addr,control_register,2,false);
+    
+    char enable_register[2] = {128,3};
+    i2c.write(sensor_addr,enable_register,2,false);
+    
+    // Read data from color sensor (Clear/Red/Green/Blue)
+    
+    while (true) { 
+        char clear_reg[1] = {148};
+        char clear_data[2] = {0,0};
+        i2c.write(sensor_addr,clear_reg,1, true);
+        i2c.read(sensor_addr,clear_data,2, false);
+        
+        int clear_value = ((int)clear_data[1] << 8) | clear_data[0];
+        
+        char red_reg[1] = {150};
+        char red_data[2] = {0,0};
+        i2c.write(sensor_addr,red_reg,1, true);
+        i2c.read(sensor_addr,red_data,2, false);
+        
+        int red_value = ((int)red_data[1] << 8) | red_data[0];
+        
+        char green_reg[1] = {152};
+        char green_data[2] = {0,0};
+        i2c.write(sensor_addr,green_reg,1, true);
+        i2c.read(sensor_addr,green_data,2, false);
+        
+        int green_value = ((int)green_data[1] << 8) | green_data[0];
+        
+        char blue_reg[1] = {154};
+        char blue_data[2] = {0,0};
+        i2c.write(sensor_addr,blue_reg,1, true);
+        i2c.read(sensor_addr,blue_data,2, false);
+        
+        int blue_value = ((int)blue_data[1] << 8) | blue_data[0];
+        
+        // print sensor readings
+        
+        pc.printf("Clear (%d), Red (%d), Green (%d), Blue (%d)\n", clear_value, red_value, green_value, blue_value);
+        wait(0.5);
+    }
+    
+}