Diff: TSL2561.cpp

Revision:

0:df9baf6459b7

Child:

1:ab906ac6e90b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TSL2561.cpp	Tue Sep 10 15:13:49 2013 +0000
@@ -0,0 +1,236 @@
+
+#include "TSL2561.h"
+Serial DEBUG(USBTX, USBRX);
+
+#define DEBUG_PRINTX(z,x)             if(z==1) DEBUG.printf(x);
+#define DEBUG_PRINTLNX(z,x)           if(z==1) {DEBUG.printf(x);        DEBUG.printf("\r\n");}
+#define DEBUG_PRINTXY(z,x, y)         if(z==1) DEBUG.printf(x, y);
+#define DEBUG_PRINTLNXY(z,x, y)       if(z==1) {DEBUG.printf(x, y);     DEBUG.printf("\r\n");}
+
+TSL2561::TSL2561():i2c(TSL2561_I2C_PINNAME_SDA,TSL2561_I2C_PINNAME_SCL){
+    i2c.frequency (300);
+    _addr = TSL2561_ADDR_FLOAT<<1;
+    _initialized = false;
+    _integration = TSL2561_INTEGRATIONTIME_13MS;
+    _gain = TSL2561_GAIN_16X;    
+}
+
+TSL2561::TSL2561(uint8_t addr):i2c(TSL2561_I2C_PINNAME_SDA,TSL2561_I2C_PINNAME_SCL) {
+
+  _addr = addr<<1;
+  _initialized = false;
+  _integration = TSL2561_INTEGRATIONTIME_13MS;
+  _gain = TSL2561_GAIN_16X;
+  // we cant do wire initialization till later, because we havent loaded Wire yet
+}
+
+TSL2561::TSL2561(PinName sda, PinName scl):i2c(sda, scl) {
+
+  _addr = TSL2561_ADDR_FLOAT<<1;
+  _initialized = false;
+  _integration = TSL2561_INTEGRATIONTIME_13MS;
+  _gain = TSL2561_GAIN_16X;
+  // we cant do wire initialization till later, because we havent loaded Wire yet
+}
+
+TSL2561::TSL2561(PinName sda, PinName scl, uint8_t addr):i2c(sda, scl) {
+
+  _addr = addr<<1;
+  _initialized = false;
+  _integration = TSL2561_INTEGRATIONTIME_13MS;
+  _gain = TSL2561_GAIN_16X;
+  // we cant do wire initialization till later, because we havent loaded Wire yet
+}
+
+uint16_t TSL2561::getLuminosity (uint8_t channel) {
+
+  uint32_t x = getFullLuminosity();
+
+  if (channel == 0) {
+    // Reads two byte value from channel 0 (visible + infrared)
+    
+    return (x & 0xFFFF);
+  } else if (channel == 1) {
+    // Reads two byte value from channel 1 (infrared)
+    
+    return (x >> 16);
+  } else if (channel == 2) {
+    // Reads all and subtracts out just the visible!
+    
+    return ( (x & 0xFFFF) - (x >> 16));
+  }
+  
+  // unknown channel!
+  return 0;
+}
+
+uint32_t TSL2561::getFullLuminosity (void)
+{
+  if (!_initialized) begin();
+
+  // Enable the device by setting the control bit to 0x03
+  enable();
+
+  // Wait x ms for ADC to complete
+  switch (_integration)
+  {
+    case TSL2561_INTEGRATIONTIME_13MS:
+      wait_ms(14);
+      break;
+    case TSL2561_INTEGRATIONTIME_101MS:
+      wait_ms(102);
+      break;
+    default:
+      wait_ms(403);
+      break;
+  }
+
+DEBUG_PRINTLNXY(1," Integration:= %d",_integration);
+
+  uint32_t x;
+  x = read16(TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN1_LOW);
+  
+  DEBUG_PRINTLNXY(1," x:= %d",x);
+  
+  x <<= 16;
+  x |= read16(TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN0_LOW);
+
+  DEBUG_PRINTLNXY(1," x:= %d",x);
+  
+    wait(3);
+  disable();
+
+  return x;
+}
+
+
+bool TSL2561::begin(void) {
+
+    char reg = TSL2561_REGISTER_ID;
+    char read;
+    
+    i2c.start();
+    i2c.write(_addr);
+    i2c.write(reg);
+    
+    //i2c.start();
+    //i2c.write(reg);
+    read = i2c.read(1);    
+    i2c.stop();   
+    
+  if (read & 0x0A ) {
+    DEBUG_PRINTLNXY(1,"Read 0x%x => Found TSL2561",read);
+  } else {
+    return false;
+  } 
+    _initialized = true;
+     
+    // Set default integration time and gain
+    setTiming(_integration);
+    setGain(_gain);
+  
+    // Note: by default, the device is in power down mode on bootup
+    disable();    
+    
+    return true;
+ }
+ 
+ uint16_t TSL2561::read16(uint8_t reg)
+{
+    uint16_t x; uint16_t t;
+    char _x;char _t;char r[1];
+    r[0] = reg;
+ 
+    i2c.start();
+    i2c.write(_addr);
+    i2c.write(reg);
+    
+    //i2c.start();
+    //i2c.write(reg);
+    _t = i2c.read(1);
+    _x = i2c.read(1);
+    
+    DEBUG_PRINTLNXY(0,"%x",_x);
+    DEBUG_PRINTLNXY(0,"%x",_t);
+    
+    i2c.stop();
+   
+    t=(uint16_t)&_t;
+    x=(uint16_t)&_x;
+    x <<= 8;
+    x |= t;
+    return x;
+}
+ 
+ void TSL2561::write8 (uint8_t reg, uint8_t value)
+{ 
+    i2c.start();
+    i2c.write(_addr);
+    i2c.write(reg);
+    i2c.write(value);
+    i2c.stop(); 
+}
+
+void TSL2561::setTiming(tsl2561IntegrationTime_t integration){
+
+if (!_initialized) begin();
+
+else DEBUG_PRINTLNX(1,"--------------Set Timing---------");
+
+  enable();
+  
+  _integration = integration;
+  
+  DEBUG_PRINTLNXY(1,"Integration: 0x%x",_integration);
+  DEBUG_PRINTLNXY(1,"Gain: 0x%x",_gain);
+  DEBUG_PRINTLNXY(1,"Integration | Gain: 0x%x",_integration | _gain);
+  
+  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_TIMING, _integration | _gain);  
+  
+  disable();
+  
+  DEBUG_PRINTLNX(1,"--------------Complete Set Timing-------------");
+  
+  wait(1);
+
+}
+
+void TSL2561::setGain(tsl2561Gain_t gain) {
+
+if (!_initialized) begin();
+else    DEBUG_PRINTLNX(1,"-------------Set Gain--------------");
+
+
+  enable();
+  
+  DEBUG_PRINTLNXY(1,"Intergration: 0x%x",_integration);
+  DEBUG_PRINTLNXY(1,"Gain: 0x%x",_gain);
+  DEBUG_PRINTLNXY(1,"Intergration | Gain: 0x%x",_integration | _gain);
+  
+  _gain = gain;
+  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_TIMING, _integration | _gain);  
+  //write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_TIMING,  _gain);  
+  disable();
+  
+  DEBUG_PRINTLNX(1,"---------------Complete Set Gain----------------");
+  wait(1);
+  
+}
+
+void TSL2561::enable(void)
+{
+  if (!_initialized) begin();
+
+  // Enable the device by setting the control bit to 0x03
+  DEBUG_PRINTLNX(1," Power On");
+  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_CONTROL, TSL2561_CONTROL_POWERON);
+}
+
+void TSL2561::disable(void)
+{
+  if (!_initialized) begin();
+
+  // Disable the device by setting the control bit to 0x03
+  DEBUG_PRINTLNX(1," Power Off");
+  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_CONTROL, TSL2561_CONTROL_POWEROFF);
+}
\ No newline at end of file