Diff: Proximity.cpp

Revision:

1:1b516e98444f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Proximity.cpp	Tue Sep 27 15:47:49 2016 +0000
@@ -0,0 +1,143 @@
+#include "mbed.h"
+#include "Proximity.h"
+
+I2C *proximityi2c;
+short proximityData [NUM_PROXIMIY_SENSORS][3];
+short lastProximityData [NUM_PROXIMIY_SENSORS][3];
+char dataStr[NUM_PROXIMIY_SENSORS*32];
+
+Proximity::Proximity(void)
+{
+
+
+}
+
+void Proximity::init(void)
+{
+    proximityi2c = new I2C(PTE25, PTE24);
+    proximityi2c->frequency(400000);
+}
+
+void Proximity::write_reg(char address,char reg, char cmd)
+{
+    char txbuffer [2];
+    txbuffer[0] = reg;
+    txbuffer[1] = cmd;
+
+    proximityi2c->write(address<<1, txbuffer, 2,false );
+
+} 
+
+void Proximity::write(char address, char cmd)
+{
+    char txbuffer [1];
+    txbuffer[0] = cmd;
+
+    proximityi2c->write(address<<1, txbuffer, 1,false );
+
+}  
+
+unsigned char Proximity::read_reg(char address,char reg)
+{
+    char txbuffer [1];
+    char rxbuffer [1];
+    rxbuffer[0] = 0;
+    txbuffer[0] = reg;
+    proximityi2c->write(address<<1, txbuffer, 1,false );
+    proximityi2c->read(address<<1, rxbuffer, 1 );
+    return (unsigned char)rxbuffer[0];
+}
+void Proximity::off()
+{
+    for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
+    {
+        write(MUXADDRESS,1<<sensor); 
+        write_reg(PROXIMITYADDRESS,0x41,0x00);
+    }
+}
+
+void Proximity::on()
+{  
+    for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
+    {
+
+        lastProximityData[sensor][0] = 1000;
+        write(MUXADDRESS,1<<sensor); 
+        write_reg(PROXIMITYADDRESS,0x41,Als400Ps400); // initiate ALS: and PS
+        write_reg(PROXIMITYADDRESS,0x42,GainAls64Ir64|C25ma); // set ALS_VIS=ALS_IR GAIN = 64 current 25ma
+    }
+    wait(0.5);
+}
+       
+void Proximity::scan()
+{  
+    for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
+    {
+        write(MUXADDRESS,1<<sensor);
+        //proximity_sensor_on(sensor);
+        unsigned char prox_lsb = read_reg(PROXIMITYADDRESS,0x44);
+        unsigned char prox_msb = read_reg(PROXIMITYADDRESS,0x45);
+        unsigned char ALS_lsb = read_reg(PROXIMITYADDRESS,0x46);
+        unsigned char ALS_msb = read_reg(PROXIMITYADDRESS,0x47);
+        unsigned char IR_lsb = read_reg(PROXIMITYADDRESS,0x48);
+        unsigned char IR_msb = read_reg(PROXIMITYADDRESS,0x49);
+    
+        short proximity = prox_msb*256+prox_lsb;
+        short ALS = ALS_msb*256+ALS_lsb;
+        short IR = IR_msb*256+IR_lsb;
+        proximityData[sensor][0] = proximity;
+        proximityData[sensor][1] = ALS;
+        proximityData[sensor][2] = IR;
+        //proximity_sensor_off(sensor);
+        //pc.printf(GRN "Sensor %d = %d, %d, %d\n\r",sensor,proximity,ALS,IR);
+    }
+
+}
+
+bool Proximity::changed(short delta)
+{
+    for(int sensor = 0;sensor<NUM_PROXIMIY_SENSORS;sensor++)
+    {
+        if(abs(proximityData[sensor][0] - lastProximityData[sensor][0]) > delta)
+        {
+            return true;
+        }
+    }
+
+    return false;
+}   
+
+short Proximity::getProximity(int sensor)
+{
+    return proximityData[sensor][0];
+}
+short Proximity::getAmbientLight(int sensor)
+{
+    return proximityData[sensor][1];
+}
+short Proximity::getIR(int sensor)
+{
+    return proximityData[sensor][2];
+}
+
+char* Proximity::getDataStr()
+{
+    int i=0;
+    int index = 0;
+    index += sprintf(&dataStr[index],"[");
+    for (i=0; i<NUM_PROXIMIY_SENSORS; i++)
+    {
+        if(i<NUM_PROXIMIY_SENSORS-1)
+            index += snprintf(&dataStr[index], 128, "{\"s\":%d,\"p\":%d,\"l\":%d,\"r\":%d},", i,proximityData[i][0],proximityData[i][1],proximityData[i][2]);
+        else
+            index += snprintf(&dataStr[index], 128, "{\"s\":%d,\"p\":%d,\"l\":%d,\"r\":%d}]", i,proximityData[i][0],proximityData[i][1],proximityData[i][2]);
+        lastProximityData[i][0] = proximityData[i][0];
+        lastProximityData[i][1] = proximityData[i][1];
+        lastProximityData[i][2] = proximityData[i][2];
+    } 
+    return dataStr;
+}
+    
+    
+
+