Diff: PCF8591.cpp

Revision:

1:7e567e0adc6d

Parent:

0:1116b0d151fc

--- a/PCF8591.cpp	Sat Sep 21 19:25:09 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,293 +0,0 @@
-/* PCF8591 - I2C 8 bit 4 channel A/D and 8 bit 1 channel D/A converter
- * Copyright (c) 2013 Wim Huiskamp
- *
- * Released under the MIT License: http://mbed.org/license/mit
- *
- * version 0.2 Initial Release
-*/
-#include "mbed.h"
-#include "PCF8591.h"
-
-
-/** Create a PCF8591 AD and DA object using a specified I2C bus and slaveaddress
-  *
-  * @param I2C &i2c the I2C port to connect to 
-  * @param char deviceAddress the address of the PCF8591
-  */  
-PCF8591::PCF8591(I2C *i2c, uint8_t deviceAddress) : _i2c(i2c) {
-    
-  _slaveAddress = deviceAddress;
-  _init(); 
-}
-
-
-#if(0)
-//These methods are disabled since they interfere with normal expected behaviour for mbed type Analog I/O
-//
-  
-/** Set ADC mode
-  *
-  * @param adc_mode      ADC Channel mode, valid Range (PCF8591_4S, PCF8591_3D, PCF8591_2S_1D, PCF8591_2D)
-  */  
-void PCF8591::setADCMode(uint8_t mode){
-  uint8_t data[6];
-  
-  _mode = _mode & ~PCF8591_2D; // Clear ADC mode bits
-  
-  switch (mode) {
-    case PCF8591_4S:
-                _mode = _mode | PCF8591_4S;
-                break; 
-    case PCF8591_3D:
-                _mode = _mode | PCF8591_3D;
-                break;    
-    case PCF8591_2S_1D:
-                _mode = _mode | PCF8591_2S_1D;
-                break;    
-    case PCF8591_2D:
-                _mode = _mode | PCF8591_2D;
-                break;    
-    default:
-                _mode = _mode | PCF8591_4S;    
-                break; 
-  }    
-        
-  data[0] = _mode;             // Control Reg
-  
-  // write data to the device
-  _i2c->write(_slaveAddress, (char*) data, 1);  
-   
-};
-
-/** Set DAC mode
-  *
-  * @param dac_mode      DAC Channel mode, valid Range (false=disable, true=enable)
-  */  
-void PCF8591::setDACMode(bool mode) {
-  uint8_t data[6];
-   
-  if (mode) 
-    _mode = _mode | PCF8591_AOUT;  // Enable DAC output
-  else
-    _mode = _mode & ~PCF8591_AOUT; // Disable DAC output
-
-  data[0] = _mode;             // Control Reg
-  
-  // write data to the device
-  _i2c->write(_slaveAddress, (char*) data, 1);  
-  
-};
-#endif
-
-
-/** Write Analog Output
-  *
-  * @param  analogOut  output value (0..255)
-  */  
-void PCF8591::write(uint8_t analogOut) {
-  uint8_t data[6];
-   
-  data[0] = _mode;             // Control Reg
-  data[1] = analogOut;         // DAC Channel
-  
-  // write data to the device
-  _i2c->write(_slaveAddress, (char*) data, 2);  
-};        
-
-/** Read Analog Channel 
-  *
-  * @param Channel   ADC channel, valid range PCF8591_ADC0, PCF8591_ADC1, PCF8591_ADC2 or PCF8591_ADC3
-  * @return value    uint8_t AD converted value (0..255, representing 0V..Vcc)   
-  */  
-#if(0)
-// I2C block operations test
-// Causes problems with Ticker and printf on LPC812. No issues found on LPC1768
-uint8_t PCF8591::read(uint8_t channel) {
-//  uint8_t data[6];
-  uint8_t data[6] = {123,123,123,123,123,123}; //test to check failed read
-    
-  _mode   = _mode & ~PCF8591_CHMSK;            // Clear ADC Channel bits
-  _mode   = _mode | (channel & PCF8591_CHMSK); // Set ADC Channel bits
-    
-  data[0] = _mode;             // Init Control Reg
-  
-  // write data to the device to select the ADC channel
-  _i2c->write(_slaveAddress, (char*) data, 1);  
- 
-  // read selected ADC channel
-  // note that first byte is a 'dummy' and should be ignored
-  _i2c->read(_slaveAddress, (char*) data, 2);  
-  return data[1];
-};
-
-#else
-// I2C single byte operations test
-// No issues found on LPC812
-uint8_t PCF8591::read(uint8_t channel) {
-  uint8_t data[6];
-//  uint8_t data[6] = {123,123,123,123,123,123}; //test to check failed read
-    
-  _mode   = _mode & ~PCF8591_CHMSK;            // Clear ADC Channel bits
-  _mode   = _mode | (channel & PCF8591_CHMSK); // Set ADC Channel bits
-    
-  data[0] = _mode;             // Init Control Reg
-  
-  // write data to the device to select the ADC channel
-  _i2c->start();  
-  _i2c->write(_slaveAddress);        // Slave write address 
-  _i2c->write(data[0]);  
-  _i2c->stop();  
-   
-  // read selected ADC channel
-  // note that first byte is a 'dummy' and should be ignored
-  _i2c->start();  
-  _i2c->write(_slaveAddress | 0x01); // Slave read address 
-  data[0]=_i2c->read(1);  //ack
-  data[1]=_i2c->read(0);  //nack  
-  _i2c->stop();  
-  
-  return data[1];
-};
-
-#endif
-
-
-/** Initialise AD and DA driver 
-  *
-  */  
-void PCF8591::_init() {
-  uint8_t data[6];
-  
-  _mode   = PCF8591_CTRL_DEF;  // Init mode
-  
-  data[0] = _mode;             // Init Control Reg
-  data[1] = 0x00;              // Init DAC Channel to 0
-  
-  // write data to the device
-  _i2c->write(_slaveAddress, (char*) data, 2);  
-}; 
-
-
-
-
-
-/** Create a PCF8591 AnalogOut object connected to the specified I2C bus and deviceAddress
- *
- */
-PCF8591_AnalogOut::PCF8591_AnalogOut(I2C *i2c, uint8_t deviceAddress) : _i2c(i2c) {
-    
-  _slaveAddress = deviceAddress;
-  _init(); 
-}
- 
-
-/** Write Analog Output
-  *
-  * @param  analogOut value (0 .. 1.0)
-  */  
-void PCF8591_AnalogOut::write(float analogOut) {
-  uint8_t data[6];
-
-  data[0] = _mode;             // Control Reg
-
-  // DAC Channel
-  if (analogOut < 0.0) data[1] = 0;
-  else if (analogOut >= 1.0) data[1] = 255;
-       else data[1] = uint8_t (analogOut * 255.0);      
-   
-  // write data to the device
-  _i2c->write(_slaveAddress, (char*) data, 2);  
-};        
-
-/** Operator = Analog Output
-  *
-  * @param  analogOut value (0.0f .. 1.0f)
-  */  
-PCF8591_AnalogOut& PCF8591_AnalogOut::operator= (float value){  
-  write(value);     
-  return *this;   
-}
- 
-
-/** Initialise DAC driver 
-  *
-  */  
-void PCF8591_AnalogOut::_init() {
-  uint8_t data[6];
-  
-  _mode   = PCF8591_CTRL_DEF;  // Init mode
-  
-  data[0] = _mode;             // Init Control Reg
-  data[1] = 0x00;              // Init DAC Channel to 0
-  
-  // write data to the device
-  _i2c->write(_slaveAddress, (char*) data, 2);  
-}; 
-
-
-
-/** Create a PCF8591 AnalogIn object connected to the specified I2C bus and deviceAddress
- *
- */
-PCF8591_AnalogIn::PCF8591_AnalogIn(I2C *i2c, uint8_t channel, uint8_t deviceAddress) : _i2c(i2c) {
-    
-  _slaveAddress = deviceAddress;
-  _channel = channel;  
-  _init(); 
-}
- 
-
-/** Read Analog input
-  *
-  * @return analogIn value (0 .. 1.0)
-  */  
-float PCF8591_AnalogIn::read() {
-  uint8_t data[6];
-    
-  data[0] = _mode;             // Init Control Reg
-  
-  // write data to the device to select the ADC channel
-  _i2c->start();  
-  _i2c->write(_slaveAddress);        // Slave write address 
-  _i2c->write(data[0]);  
-  _i2c->stop();  
-   
-  // read selected ADC channel
-  // note that first byte is a 'dummy' and should be ignored
-  _i2c->start();  
-  _i2c->write(_slaveAddress | 0x01); // Slave read address 
-  data[0]=_i2c->read(1);  //ack
-  data[1]=_i2c->read(0);  //nack  
-  _i2c->stop();  
-  
- 
-  // ADC Channel
-  return ((float) data[1] / 255.0);       
-  
-};
-
-
-/** Operator float Analog Input
-  *
-  * @return analogIn value (0 .. 1.0)
-  */  
-PCF8591_AnalogIn::operator float(){
-  return (read());    
-}
- 
-
-/** Initialise ADC driver 
-  *
-  */  
-void PCF8591_AnalogIn::_init() {
-  uint8_t data[6];
-  
-  _mode   = PCF8591_CTRL_DEF;  // Init mode
-  _mode   = _mode & ~PCF8591_CHMSK;             // Clear ADC Channel bits
-  _mode   = _mode | (_channel & PCF8591_CHMSK); // Set ADC Channel bits
-      
-  data[0] = _mode;             // Init Control Reg
-  
-  // write data to the device
-  _i2c->write(_slaveAddress, (char*) data, 1);  
-};