Started with the DAC driver.

software/app/application.cpp

@@ -2,6 +2,7 @@
 #include <SmingCore/SmingCore.h>
 #include <SmingCore/HardwareSerial.h>
 #include "ads101x.h"
+#include "dac101c085.h"
 #include "sensor_hub.h"
 #include "sensor_settings.h"
 #include "double_buffer.h"
@@ -13,6 +14,7 @@ static const int HUB_PERIOD = 5;
 static const int ADC_TIMEBASE = 250;
 static const int ADC_PERIOD = 5;
 static const uint8_t ADC_ADDRESS = 0x48;
+static const uint8_t DAC_ADDRESS = 0x0C;
 
 using namespace rijnfel;
 
@@ -22,6 +24,7 @@ void STAGotIP(IPAddress ip, IPAddress mask, IPAddress gateway);
 
 Timer procTimer;
 ads::cADS101x adc(0, ADC_ADDRESS);
+dac::cDAC101C085 mydac(1, DAC_ADDRESS);
 uint8_t channel = 0;
 
 cSensorHub hub(HUB_PERIOD);
@@ -66,6 +69,13 @@ void init() {
 	cWebInterface::GetInstance()->Start();
 
 	procTimer.initializeMs(HUB_PERIOD, updateSensorHub).start();
+	mydac.checkDev();
+	Serial.print("Write DAC reg: ");
+	Serial.print(mydac.changeSettings(dac::eOpMode::NORMAL, 1023));
+	Serial.println("");
+	Serial.print("Read out DAC regs: ");
+	Serial.print(mydac.ReadSettings());
+	Serial.println("");
 }
 
 void STADisconnect(String ssid, uint8_t ssid_len, uint8_t bssid[6],

software/app/dac101c085.cpp

@@ -0,0 +1,138 @@
+//----------------------------------------------------------------------------------------------------------------------------
+// Project:     Uppsense
+// Name:        dac101c085.cpp
+// Author:      Maximilian Stiefel
+// Date:        08.08.2017
+//
+// Description:
+//
+//----------------------------------------------------------------------------------------------------------------------------
+
+//-------------------------------------Libraries------------------------------------------------------------------------------
+#include "dac101c085.h"
+#include <SmingCore/Wire.h>
+#include <SmingCore/SmingCore.h>
+
+//-------------------------------------Namespaces-----------------------------------------------------------------------------
+namespace rijnfel {
+namespace dac {
+
+//-------------------------------------Constructor----------------------------------------------------------------------------
+cDAC101C085::cDAC101C085(uint8_t i_number, uint8_t i_address):
+	m_number(i_number), m_address(i_address)
+{}
+
+//-------------------------------------Destructor-----------------------------------------------------------------------------
+cDAC101C085::~cDAC101C085()
+{}
+
+//-------------------------------------checkDev-------------------------------------------------------------------------------
+void cDAC101C085::checkDev()
+{
+	// Vars
+	byte error = 0;
+	// Action
+	#if DEBUG_LEVEL == 1
+	Serial.print("DAC: Scanning address 0x");
+	Serial.print(m_address, HEX);
+	Serial.println(".");	
+	#endif
+	Wire.beginTransmission(m_address);
+	error = Wire.endTransmission();
+	I2CError(error); // Pass to error parser
+}
+
+//-------------------------------------changeSettings-------------------------------------------------------------------------
+uint8_t cDAC101C085::changeSettings(enum eOpMode mode, uint16_t val)
+{
+	// Vars
+	uint16_t settings = 0;
+	// Action
+	if( val > 1023)
+		return 0; // This is illegal
+	settings = val << D_BITS_POS; // First two bits have to be 0
+	switch(mode)
+	{
+		case NORMAL:
+		       		settings += 0b00 << PD_BITS_POS;	
+				break;
+		case PULL_DOWN_2K5:
+				settings += 0b01 << PD_BITS_POS;	
+				break;
+		case PULL_DOWN_100K:
+				settings += 0b10 << PD_BITS_POS;	
+				break;
+		case HIGH_IMPEDANCE:
+				settings += 0b11 << PD_BITS_POS;	
+				break;
+
+	}
+	return WriteSettings(settings);	
+}
+
+//-------------------------------------WriteSettings--------------------------------------------------------------------------
+uint8_t cDAC101C085::WriteSettings(uint16_t settings)
+{
+	// Vars
+	uint8_t error = 0;
+	// Action
+	Wire.beginTransmission(m_address);
+	Wire.write( (uint8_t) (settings >> 8) ); // Most significant byte
+	Wire.write( (uint8_t) (settings & 0xFF) ); // Least significant byte
+	error = Wire.endTransmission();
+	Serial.print(settings);
+	return I2CError(error); // Pass to error parser	
+}
+
+//-------------------------------------ReadSettings--------------------------------------------------------------------------
+uint16_t cDAC101C085::ReadSettings(void)
+{
+	// Vars
+	uint8_t number = 0;
+	uint16_t settings = 0;
+
+	// Action
+	number = Wire.requestFrom(m_address, (uint8_t) 2);
+	if( number != 2)
+	{
+	        Serial.print("DAC: Trying to read 2 bytes from 0x");
+	        Serial.print(m_address, HEX);
+	        Serial.println(" went wrong.");
+		return 0;
+	}
+	settings = (uint16_t) Wire.read() << 8; // Most significant byte
+	settings += (uint16_t) Wire.read(); // Least significant byte
+	return settings;
+}
+
+//-------------------------------------I2CError-------------------------------------------------------------------------------
+uint8_t cDAC101C085::I2CError(uint8_t error)
+{
+	switch(error)
+	{
+		case 0:
+			#if DEBUG_LEVEL == 1
+			Serial.println("DAC: I2C device found. Transmission successful.");
+			#endif
+			break;
+		case 2:
+			Serial.print("DAC: Received NACK after address from 0x.");
+			Serial.print(m_address, HEX);
+			Serial.println(".");
+			break;
+		case 3:
+			Serial.print("DAC: Received NACK after data from 0x.");
+			Serial.print(m_address, HEX);
+			Serial.println(".");
+			break;
+		case 4:
+			Serial.print("DAC: Unknow error at 0x.");
+			Serial.print(m_address, HEX);
+			Serial.println(".");
+			break;
+	}	
+	return ( (error == 0) ? 1 : 0 );
+}
+
+}
+}

software/app/dac101c085.h

@@ -0,0 +1,48 @@
+//----------------------------------------------------------------------------------------------------------------------------
+// Project:    	Uppsense
+// Name:	dac101c085.h
+// Author:	Maximilian Stiefel
+// Date:	08.08.2017
+//
+// Description:
+//
+//----------------------------------------------------------------------------------------------------------------------------
+
+#ifndef APP_DAC101C085_H_
+#define APP_DAC101C085_H_
+
+//-------------------------------------Libraries------------------------------------------------------------------------------
+#include <stdint.h>
+
+//-------------------------------------Defines--------------------------------------------------------------------------------
+#define DEBUG_LEVEL 1 // 1 a lot debugging output, else rare debugging output
+#define PD_BITS_POS 14 // Position of power down bits
+#define D_BITS_POS 2 // Position of data bits
+
+//-------------------------------------Namespaces-----------------------------------------------------------------------------
+namespace rijnfel {
+namespace dac {
+
+//-------------------------------------Enums----------------------------------------------------------------------------------
+enum eOpMode {NORMAL, PULL_DOWN_2K5, PULL_DOWN_100K, HIGH_IMPEDANCE};
+
+//-------------------------------------cDAC101085-----------------------------------------------------------------------------
+class cDAC101C085
+{
+public:
+	cDAC101C085(uint8_t number, uint8_t i_address); // Constructor
+	~cDAC101C085(); // Destructor
+	void checkDev(); // Check if device is available and alive
+	uint16_t ReadSettings(void);
+	uint8_t WriteSettings(uint16_t settings);
+	uint8_t changeSettings(enum eOpMode mode, uint16_t val);
+
+private:	
+	uint8_t m_number; // Which of the dacs is it?
+	uint8_t m_address;
+	uint8_t I2CError(uint8_t error);
+};
+
+}
+}
+#endif /* APP_DAC101C085_H_ */