DAC Software Test

- Korrekte Software: Nur noch kleiner offset max. -+5mV

dev/digital/DAC_MCP4728/DAC_MCP4728.PrjPcb

@@ -85,7 +85,7 @@ ActiveProfile=YLWLMSCQ
 ProfileId0=YLWLMSCQ
 ProfileName0=Mixed Sim Configuration
 OutputType0=AdvSimNetlist
-ConfigParameters0=OP_Analysis=False|TRAN_Analysis=True|DC_Analysis=False|AC_Analysis=False|TF_Analysis=False|PZ_Analysis=False|Noise_Analysis=False|SP_Analysis=False|TRAN_FourierAnalysis=False|TRAN_StressAnalysis=False|TempSweep_Analysis=False|ParamSweep_Analysis=False|MonteCarlo_Analysis=False|TF_Enabled=False|TF_Source=|TF_Reference=0|PZ_Enabled=False|PZ_Node1=|PZ_Node2=0|PZ_Node3=|PZ_Node4=0|PZ_AnalType=PZ|PZ_TfType=VOL|AnalysesDataSavedIndex=4|DC_ShowMeasTableChart=False|DC_PrimarySource=|DC_PrimaryStart=|DC_PrimaryStop=|DC_PrimaryStep=|DC_EnableSecondary=False|DC_SecondarySource=|DC_SecondaryStart=|DC_SecondaryStop=|DC_SecondaryStep=|Noise_Enabled=False|Noise_Source=|Noise_Output=|Noise_Reference=0|Noise_Start_UserValue=|Noise_Start=1K|Noise_Stop_UserValue=|Noise_Stop=1G|Noise_TestPoints_UserValue=|Noise_TestPoints=10|Noise_PointsPerSummary=0|Noise_SweepType=DEC|SP_Enabled=False|AC_StartFrequency_UserValue=|AC_StartFrequency=1K|AC_StopFrequency_UserValue=|AC_StopFrequency=1G|AC_TestPoints_UserValue=|AC_TestPoints=10|AC_SweepType=DEC|AC_ShowMeasTableChart=False|SP_Port0=|SP_Impedance0_UserValue=|SP_Impedance0=50|SP_Port1=|SP_Impedance1_UserValue=|SP_Impedance1=50|TRAN_StartTime_UserValue=|TRAN_StartTime=0|TRAN_StopTime_UserValue=|TRAN_StopTime=5u|TRAN_StepTime_UserValue=|TRAN_StepTime=0.1u|TRAN_MaxStepTime_UserValue=|TRAN_MaxStepTime=0.1u|TRAN_AlwaysSetDefaults=False|TRAN_DefaultCycles_UserValue=|TRAN_DefaultCycles=5|TRAN_DefaultPointsPerCycle_UserValue=|TRAN_DefaultPointsPerCycle=25|TRAN_UseInitialConditions=False|TRAN_FourierEnabled=False|TRAN_FourierFundFreq_UserValue=|TRAN_FourierFundFreq=1Meg|TRAN_FourierNumHarmonics_UserValue=|TRAN_FourierNumHarmonics=10|TRAN_StressEnabled=False|TRAN_ShowMeasTableChart=False|TempSweep_Start_UserValue=|TempSweep_Start=-10|TempSweep_Stop_UserValue=|TempSweep_Stop=60|TempSweep_Step_UserValue=|TempSweep_Step=10|ParamSweep_Parameter1=|ParamSweep_Type1=LIN|ParamSweep_Start1=|ParamSweep_Stop1=|ParamSweep_Step1=|ParamSweep_SweepType1=False|ParamSweep_SecondaryEnabled=False|ParamSweep_Parameter2=|ParamSweep_Type2=LIN|ParamSweep_Start2=|ParamSweep_Stop2=|ParamSweep_Step2=|ParamSweep_SweepType2=False|MonteCarlo_NumberOfRuns=10|MonteCarlo_DistributionType=GAUSS|MonteCarlo_Seed=-1|MonteCarlo_ResistorTolerance=10%|MonteCarlo_ResistorTolerance_UserValue=10%|MonteCarlo_CapacitorTolerance=10%|MonteCarlo_CapacitorTolerance_UserValue=10%|MonteCarlo_InductorTolerance=10%|MonteCarlo_InductorTolerance_UserValue=10%|MonteCarlo_TransistorTolerance=10%|MonteCarlo_TransistorTolerance_UserValue=10%|MonteCarlo_DCSourceTolerance=10%|MonteCarlo_DCSourceTolerance_UserValue=10%|MonteCarlo_DigitalTpTolerance=10%|MonteCarlo_DigitalTpTolerance_UserValue=10%|Sensitivity_Analysis=False|Sensitivity_GroupDeviationsEnabled=False|Sensitivity_GroupResistorEnabled=True|Sensitivity_GroupResistorDeviation_UserValue=|Sensitivity_GroupResistorDeviation=1m|Sensitivity_GroupCapacitorEnabled=False|Sensitivity_GroupCapacitorDeviation_UserValue=|Sensitivity_GroupCapacitorDeviation=1m|Sensitivity_GroupInductorEnabled=False|Sensitivity_GroupInductorDeviation_UserValue=|Sensitivity_GroupInductorDeviation=1m|Sensitivity_GroupTransistorEnabled=False|Sensitivity_GroupTransistorDeviation_UserValue=|Sensitivity_GroupTransistorDeviation=1m|Sensitivity_GroupDcSourceEnabled=False|Sensitivity_GroupDcSourceDeviation_UserValue=|Sensitivity_GroupDcSourceDeviation=1m|Sensitivity_GroupGlobalParameterEnabled=False|Sensitivity_GroupGlobalParameterDeviation_UserValue=|Sensitivity_GroupGlobalParameterDeviation=1m|Sensitivity_CustomDeviationsEnabled=True|OldCfgLoaded=True|SimViewSetup=ShowActiveSignalsProbes|OPTION_Method=Trapezoidal|OPTION_SpiceRefNode_UserValue=|OPTION_SpiceRefNode=GND|OPTION_DVCC_UserValue=|OPTION_DVCC=5|OPTION_DVDD_UserValue=|OPTION_DVDD=15|InteractiveProbeMode=False|SheetsToNetlist=0
+ConfigParameters0=OP_Analysis=True|TRAN_Analysis=True|DC_Analysis=True|AC_Analysis=True|TF_Analysis=False|PZ_Analysis=False|Noise_Analysis=False|SP_Analysis=False|TRAN_FourierAnalysis=False|TRAN_StressAnalysis=False|TempSweep_Analysis=False|ParamSweep_Analysis=False|MonteCarlo_Analysis=False|TF_Enabled=False|TF_Source=|TF_Reference=0|PZ_Enabled=False|PZ_Node1=|PZ_Node2=0|PZ_Node3=|PZ_Node4=0|PZ_AnalType=PZ|PZ_TfType=VOL|AnalysesDataSavedIndex=4|DC_ShowMeasTableChart=False|DC_PrimarySource=|DC_PrimaryStart=|DC_PrimaryStop=|DC_PrimaryStep=|DC_EnableSecondary=False|DC_SecondarySource=|DC_SecondaryStart=|DC_SecondaryStop=|DC_SecondaryStep=|Noise_Enabled=False|Noise_Source=|Noise_Output=|Noise_Reference=0|Noise_Start_UserValue=|Noise_Start=1K|Noise_Stop_UserValue=|Noise_Stop=1G|Noise_TestPoints_UserValue=|Noise_TestPoints=10|Noise_PointsPerSummary=0|Noise_SweepType=DEC|SP_Enabled=False|AC_StartFrequency_UserValue=|AC_StartFrequency=1K|AC_StopFrequency_UserValue=|AC_StopFrequency=1G|AC_TestPoints_UserValue=|AC_TestPoints=10|AC_SweepType=DEC|AC_ShowMeasTableChart=False|SP_Port0=|SP_Impedance0_UserValue=|SP_Impedance0=50|SP_Port1=|SP_Impedance1_UserValue=|SP_Impedance1=50|TRAN_StartTime_UserValue=|TRAN_StartTime=0|TRAN_StopTime_UserValue=|TRAN_StopTime=5u|TRAN_StepTime_UserValue=|TRAN_StepTime=0.1u|TRAN_MaxStepTime_UserValue=|TRAN_MaxStepTime=0.1u|TRAN_AlwaysSetDefaults=False|TRAN_DefaultCycles_UserValue=|TRAN_DefaultCycles=5|TRAN_DefaultPointsPerCycle_UserValue=|TRAN_DefaultPointsPerCycle=25|TRAN_UseInitialConditions=False|TRAN_FourierEnabled=False|TRAN_FourierFundFreq_UserValue=|TRAN_FourierFundFreq=1Meg|TRAN_FourierNumHarmonics_UserValue=|TRAN_FourierNumHarmonics=10|TRAN_StressEnabled=False|TRAN_ShowMeasTableChart=False|TempSweep_Start_UserValue=|TempSweep_Start=-10|TempSweep_Stop_UserValue=|TempSweep_Stop=60|TempSweep_Step_UserValue=|TempSweep_Step=10|ParamSweep_Parameter1=|ParamSweep_Type1=LIN|ParamSweep_Start1=|ParamSweep_Stop1=|ParamSweep_Step1=|ParamSweep_SweepType1=False|ParamSweep_SecondaryEnabled=False|ParamSweep_Parameter2=|ParamSweep_Type2=LIN|ParamSweep_Start2=|ParamSweep_Stop2=|ParamSweep_Step2=|ParamSweep_SweepType2=False|MonteCarlo_NumberOfRuns=10|MonteCarlo_DistributionType=GAUSS|MonteCarlo_Seed=-1|MonteCarlo_ResistorTolerance=10%|MonteCarlo_ResistorTolerance_UserValue=10%|MonteCarlo_CapacitorTolerance=10%|MonteCarlo_CapacitorTolerance_UserValue=10%|MonteCarlo_InductorTolerance=10%|MonteCarlo_InductorTolerance_UserValue=10%|MonteCarlo_TransistorTolerance=10%|MonteCarlo_TransistorTolerance_UserValue=10%|MonteCarlo_DCSourceTolerance=10%|MonteCarlo_DCSourceTolerance_UserValue=10%|MonteCarlo_DigitalTpTolerance=10%|MonteCarlo_DigitalTpTolerance_UserValue=10%|Sensitivity_Analysis=False|Sensitivity_GroupDeviationsEnabled=False|Sensitivity_GroupResistorEnabled=True|Sensitivity_GroupResistorDeviation_UserValue=|Sensitivity_GroupResistorDeviation=1m|Sensitivity_GroupCapacitorEnabled=False|Sensitivity_GroupCapacitorDeviation_UserValue=|Sensitivity_GroupCapacitorDeviation=1m|Sensitivity_GroupInductorEnabled=False|Sensitivity_GroupInductorDeviation_UserValue=|Sensitivity_GroupInductorDeviation=1m|Sensitivity_GroupTransistorEnabled=False|Sensitivity_GroupTransistorDeviation_UserValue=|Sensitivity_GroupTransistorDeviation=1m|Sensitivity_GroupDcSourceEnabled=False|Sensitivity_GroupDcSourceDeviation_UserValue=|Sensitivity_GroupDcSourceDeviation=1m|Sensitivity_GroupGlobalParameterEnabled=False|Sensitivity_GroupGlobalParameterDeviation_UserValue=|Sensitivity_GroupGlobalParameterDeviation=1m|Sensitivity_CustomDeviationsEnabled=True|OldCfgLoaded=True|SimViewSetup=ShowActiveSignalsProbes|OPTION_Method=Trapezoidal|OPTION_SpiceRefNode_UserValue=|OPTION_SpiceRefNode=GND|OPTION_DVCC_UserValue=|OPTION_DVCC=5|OPTION_DVDD_UserValue=|OPTION_DVDD=15|SheetsToNetlist=0
 
 [OutputGroup1]
 Name=Netlist Outputs
@@ -209,7 +209,7 @@ OutputDocumentPath1=
 OutputVariantName1=
 OutputDefault1=0
 Configuration1_Name1=OutputConfigurationParameter1
-Configuration1_Item1=OP_Analysis=False|TRAN_Analysis=True|DC_Analysis=False|AC_Analysis=False|TF_Analysis=False|PZ_Analysis=False|Noise_Analysis=False|SP_Analysis=False|TRAN_FourierAnalysis=False|TRAN_StressAnalysis=False|TempSweep_Analysis=False|ParamSweep_Analysis=False|MonteCarlo_Analysis=False|TF_Enabled=False|TF_Source= |TF_Reference=0|PZ_Enabled=False|PZ_Node1= |PZ_Node2=0|PZ_Node3= |PZ_Node4=0|PZ_AnalType=PZ|PZ_TfType=VOL|AnalysesDataSavedIndex=4|DC_ShowMeasTableChart=False|DC_PrimarySource= |DC_PrimaryStart= |DC_PrimaryStop= |DC_PrimaryStep= |DC_EnableSecondary=False|DC_SecondarySource= |DC_SecondaryStart= |DC_SecondaryStop= |DC_SecondaryStep= |Noise_Enabled=False|Noise_Source= |Noise_Output= |Noise_Reference=0|Noise_Start_UserValue= |Noise_Start=1K|Noise_Stop_UserValue= |Noise_Stop=1G|Noise_TestPoints_UserValue= |Noise_TestPoints=10|Noise_PointsPerSummary=0|Noise_SweepType=DEC|SP_Enabled=False|AC_StartFrequency_UserValue= |AC_StartFrequency=1K|AC_StopFrequency_UserValue= |AC_StopFrequency=1G|AC_TestPoints_UserValue= |AC_TestPoints=10|AC_SweepType=DEC|AC_ShowMeasTableChart=False|SP_Port0= |SP_Impedance0_UserValue= |SP_Impedance0=50|SP_Port1= |SP_Impedance1_UserValue= |SP_Impedance1=50|TRAN_StartTime_UserValue= |TRAN_StartTime=0|TRAN_StopTime_UserValue= |TRAN_StopTime=5u|TRAN_StepTime_UserValue= |TRAN_StepTime=0.1u|TRAN_MaxStepTime_UserValue= |TRAN_MaxStepTime=0.1u|TRAN_AlwaysSetDefaults=False|TRAN_DefaultCycles_UserValue= |TRAN_DefaultCycles=5|TRAN_DefaultPointsPerCycle_UserValue= |TRAN_DefaultPointsPerCycle=25|TRAN_UseInitialConditions=False|TRAN_FourierEnabled=False|TRAN_FourierFundFreq_UserValue= |TRAN_FourierFundFreq=1Meg|TRAN_FourierNumHarmonics_UserValue= |TRAN_FourierNumHarmonics=10|TRAN_StressEnabled=False|TRAN_ShowMeasTableChart=False|TempSweep_Start_UserValue= |TempSweep_Start=-10|TempSweep_Stop_UserValue= |TempSweep_Stop=60|TempSweep_Step_UserValue= |TempSweep_Step=10|ParamSweep_Parameter1= |ParamSweep_Type1=LIN|ParamSweep_Start1= |ParamSweep_Stop1= |ParamSweep_Step1= |ParamSweep_SweepType1=False|ParamSweep_SecondaryEnabled=False|ParamSweep_Parameter2= |ParamSweep_Type2=LIN|ParamSweep_Start2= |ParamSweep_Stop2= |ParamSweep_Step2= |ParamSweep_SweepType2=False|MonteCarlo_NumberOfRuns=10|MonteCarlo_DistributionType=GAUSS|MonteCarlo_Seed=-1|MonteCarlo_ResistorTolerance=10%|MonteCarlo_ResistorTolerance_UserValue=10%|MonteCarlo_CapacitorTolerance=10%|MonteCarlo_CapacitorTolerance_UserValue=10%|MonteCarlo_InductorTolerance=10%|MonteCarlo_InductorTolerance_UserValue=10%|MonteCarlo_TransistorTolerance=10%|MonteCarlo_TransistorTolerance_UserValue=10%|MonteCarlo_DCSourceTolerance=10%|MonteCarlo_DCSourceTolerance_UserValue=10%|MonteCarlo_DigitalTpTolerance=10%|MonteCarlo_DigitalTpTolerance_UserValue=10%|Sensitivity_Analysis=False|Sensitivity_GroupDeviationsEnabled=False|Sensitivity_GroupResistorEnabled=True|Sensitivity_GroupResistorDeviation_UserValue= |Sensitivity_GroupResistorDeviation=1m|Sensitivity_GroupCapacitorEnabled=False|Sensitivity_GroupCapacitorDeviation_UserValue= |Sensitivity_GroupCapacitorDeviation=1m|Sensitivity_GroupInductorEnabled=False|Sensitivity_GroupInductorDeviation_UserValue= |Sensitivity_GroupInductorDeviation=1m|Sensitivity_GroupTransistorEnabled=False|Sensitivity_GroupTransistorDeviation_UserValue= |Sensitivity_GroupTransistorDeviation=1m|Sensitivity_GroupDcSourceEnabled=False|Sensitivity_GroupDcSourceDeviation_UserValue= |Sensitivity_GroupDcSourceDeviation=1m|Sensitivity_GroupGlobalParameterEnabled=False|Sensitivity_GroupGlobalParameterDeviation_UserValue= |Sensitivity_GroupGlobalParameterDeviation=1m|Sensitivity_CustomDeviationsEnabled=True|OldCfgLoaded=True|SimViewSetup=ShowActiveSignalsProbes|OPTION_Method=Trapezoidal|OPTION_SpiceRefNode_UserValue= |OPTION_SpiceRefNode=GND|OPTION_DVCC_UserValue= |OPTION_DVCC=5|OPTION_DVDD_UserValue= |OPTION_DVDD=15|InteractiveProbeMode=False|SheetsToNetlist=0|Record=AdvSimNetlistView|SimulationName=Mixed Sim Configuration|ProfileId=YLWLMSCQ
+Configuration1_Item1=OP_Analysis=True|TRAN_Analysis=True|DC_Analysis=True|AC_Analysis=True|TF_Analysis=False|PZ_Analysis=False|Noise_Analysis=False|SP_Analysis=False|TRAN_FourierAnalysis=False|TRAN_StressAnalysis=False|TempSweep_Analysis=False|ParamSweep_Analysis=False|MonteCarlo_Analysis=False|TF_Enabled=False|TF_Source= |TF_Reference=0|PZ_Enabled=False|PZ_Node1= |PZ_Node2=0|PZ_Node3= |PZ_Node4=0|PZ_AnalType=PZ|PZ_TfType=VOL|AnalysesDataSavedIndex=4|DC_ShowMeasTableChart=False|DC_PrimarySource= |DC_PrimaryStart= |DC_PrimaryStop= |DC_PrimaryStep= |DC_EnableSecondary=False|DC_SecondarySource= |DC_SecondaryStart= |DC_SecondaryStop= |DC_SecondaryStep= |Noise_Enabled=False|Noise_Source= |Noise_Output= |Noise_Reference=0|Noise_Start_UserValue= |Noise_Start=1K|Noise_Stop_UserValue= |Noise_Stop=1G|Noise_TestPoints_UserValue= |Noise_TestPoints=10|Noise_PointsPerSummary=0|Noise_SweepType=DEC|SP_Enabled=False|AC_StartFrequency_UserValue= |AC_StartFrequency=1K|AC_StopFrequency_UserValue= |AC_StopFrequency=1G|AC_TestPoints_UserValue= |AC_TestPoints=10|AC_SweepType=DEC|AC_ShowMeasTableChart=False|SP_Port0= |SP_Impedance0_UserValue= |SP_Impedance0=50|SP_Port1= |SP_Impedance1_UserValue= |SP_Impedance1=50|TRAN_StartTime_UserValue= |TRAN_StartTime=0|TRAN_StopTime_UserValue= |TRAN_StopTime=5u|TRAN_StepTime_UserValue= |TRAN_StepTime=0.1u|TRAN_MaxStepTime_UserValue= |TRAN_MaxStepTime=0.1u|TRAN_AlwaysSetDefaults=False|TRAN_DefaultCycles_UserValue= |TRAN_DefaultCycles=5|TRAN_DefaultPointsPerCycle_UserValue= |TRAN_DefaultPointsPerCycle=25|TRAN_UseInitialConditions=False|TRAN_FourierEnabled=False|TRAN_FourierFundFreq_UserValue= |TRAN_FourierFundFreq=1Meg|TRAN_FourierNumHarmonics_UserValue= |TRAN_FourierNumHarmonics=10|TRAN_StressEnabled=False|TRAN_ShowMeasTableChart=False|TempSweep_Start_UserValue= |TempSweep_Start=-10|TempSweep_Stop_UserValue= |TempSweep_Stop=60|TempSweep_Step_UserValue= |TempSweep_Step=10|ParamSweep_Parameter1= |ParamSweep_Type1=LIN|ParamSweep_Start1= |ParamSweep_Stop1= |ParamSweep_Step1= |ParamSweep_SweepType1=False|ParamSweep_SecondaryEnabled=False|ParamSweep_Parameter2= |ParamSweep_Type2=LIN|ParamSweep_Start2= |ParamSweep_Stop2= |ParamSweep_Step2= |ParamSweep_SweepType2=False|MonteCarlo_NumberOfRuns=10|MonteCarlo_DistributionType=GAUSS|MonteCarlo_Seed=-1|MonteCarlo_ResistorTolerance=10%|MonteCarlo_ResistorTolerance_UserValue=10%|MonteCarlo_CapacitorTolerance=10%|MonteCarlo_CapacitorTolerance_UserValue=10%|MonteCarlo_InductorTolerance=10%|MonteCarlo_InductorTolerance_UserValue=10%|MonteCarlo_TransistorTolerance=10%|MonteCarlo_TransistorTolerance_UserValue=10%|MonteCarlo_DCSourceTolerance=10%|MonteCarlo_DCSourceTolerance_UserValue=10%|MonteCarlo_DigitalTpTolerance=10%|MonteCarlo_DigitalTpTolerance_UserValue=10%|Sensitivity_Analysis=False|Sensitivity_GroupDeviationsEnabled=False|Sensitivity_GroupResistorEnabled=True|Sensitivity_GroupResistorDeviation_UserValue= |Sensitivity_GroupResistorDeviation=1m|Sensitivity_GroupCapacitorEnabled=False|Sensitivity_GroupCapacitorDeviation_UserValue= |Sensitivity_GroupCapacitorDeviation=1m|Sensitivity_GroupInductorEnabled=False|Sensitivity_GroupInductorDeviation_UserValue= |Sensitivity_GroupInductorDeviation=1m|Sensitivity_GroupTransistorEnabled=False|Sensitivity_GroupTransistorDeviation_UserValue= |Sensitivity_GroupTransistorDeviation=1m|Sensitivity_GroupDcSourceEnabled=False|Sensitivity_GroupDcSourceDeviation_UserValue= |Sensitivity_GroupDcSourceDeviation=1m|Sensitivity_GroupGlobalParameterEnabled=False|Sensitivity_GroupGlobalParameterDeviation_UserValue= |Sensitivity_GroupGlobalParameterDeviation=1m|Sensitivity_CustomDeviationsEnabled=True|OldCfgLoaded=True|SimViewSetup=ShowActiveSignalsProbes|OPTION_Method=Trapezoidal|OPTION_SpiceRefNode_UserValue= |OPTION_SpiceRefNode=GND|OPTION_DVCC_UserValue= |OPTION_DVCC=5|OPTION_DVDD_UserValue= |OPTION_DVDD=15|SheetsToNetlist=0|Record=AdvSimNetlistView|SimulationName=Mixed Sim Configuration|ProfileId=YLWLMSCQ
 
 [OutputGroup3]
 Name=Documentation Outputs

dev/digital/DAC_MCP4728_Test/src/main.cpp

@@ -9,12 +9,19 @@
 
 #define DAC_MAX   4095
 #define DAC_MIN   0
-#define VREF_mV   5000
+#define VREF_mV   2048
+
+#define VREF_CONF_IN_USE MCP4728_VREF_INTERNAL
+
+#define PIN_BTN   40
 
 Adafruit_MCP4728 mcp;
 
 static uint16_t value_mV = VREF_mV;
 
+bool button_state_old = false;
+bool button_state_now = false;
+
 uint16_t voltage(uint16_t mV)
 {
   return map(mV, 0, VREF_mV, DAC_MIN, DAC_MAX);
@@ -24,21 +31,29 @@ void setup()
 {
   Serial.begin(BAUDRATE);
   delay(1000);
-  Serial.print("\n\r--- ESP32-S3 + MCP4728 DAC Test ---");
+  Serial.print("\n\rMCP4728 DAC Test");
 
   Wire.begin(I2C_SDA, I2C_SCL);
   Wire.setClock(I2C_FREQ);
 
+  pinMode(PIN_BTN, INPUT);
+
   Serial.print("\n\rInitialisiere MCP4728...");
   uint8_t attempts = 0;
   while (!mcp.begin()) 
   {
+    if(attempts > 20)
+    {
+      Serial.print("\n\rError: Es konnte nach 20 Versuchen kein IC gefunden werden. Überprüfe die Verkabelung und starte den ESP neu!");
+      for(;;);
+    }
     Serial.print(".");
     delay(100);
+    attempts++;
   }
   Serial.print("\n\rErfolgreich verbunden!");
 
-  mcp.setChannelValue(MCP4728_CHANNEL_A, 0, MCP4728_VREF_INTERNAL, MCP4728_GAIN_2X);
+  mcp.setChannelValue(MCP4728_CHANNEL_A, 4095, VREF_CONF_IN_USE);
   Serial.print("\n\rDAC-Kanal A auf 0 gesetzt");
   delay(1000);
 }
@@ -46,12 +61,22 @@ void setup()
 
 void loop() 
 {
-  value_mV = 200;
+  button_state_now = digitalRead(PIN_BTN);
-  bool success = mcp.setChannelValue(MCP4728_CHANNEL_A, voltage(value_mV));
+  if (button_state_now != button_state_old) 
+  {
+    delay(10); // debounce delay
+    button_state_now = digitalRead(PIN_BTN);
+    if (button_state_now != button_state_old) 
+    {
+      button_state_old = button_state_now;
+      if (button_state_now == HIGH) 
+      {
+        if(value_mV < 2000) value_mV += (1000/12);
+        if(value_mV >= 2000) value_mV = 0;
 
-  if (success) Serial.printf("DAC A = %u -> mV: %u\r\n", voltage(value_mV), value_mV);
+        if (mcp.setChannelValue(MCP4728_CHANNEL_A, voltage(value_mV), VREF_CONF_IN_USE)) Serial.printf("DAC A = %u -> mV: %u\r\n", voltage(value_mV), value_mV);
-  else Serial.println("Schreibfehler am MCP4728!");
+        else Serial.println("Error: Neuer MCP4728 Wert konnte nicht gesetzt werden!");
-  delay(200);
+      }
-
+    }
-  //value_mV = value_mV > 0 ? value_mV/2 : VREF_mV;
+  }
 }