Schematic + Code Updates

- ESP32-S3 Komplett
- MC4728 Komplett + Test Skript

dev/analog/ETOTH-TRI-SQR-VCO_OTA/Project Outputs for TRI-SQR-VCO_OTA/TRI-SQR-VCO_OTA.nsx

@@ -1,5 +1,5 @@
 TRI-SQR-VCO_OTA
-*SPICE Netlist generated by Advanced Sim server on 01.10.2025 19:12:54
+*SPICE Netlist generated by Advanced Sim server on 08.10.2025 17:40:24
 .options MixedSimGenerated
 
 *Schematic Netlist:
@@ -44,16 +44,18 @@ RRoff NetIC3_2 Vee 650k
 QT1 NetC_an_1 0 NetC_an_2 2N2907
 QT2 NetT2_3 U_C NetC_an_2 2N2907
 JT_SAW 0 NetR_SAW_e_2 NetIC2_12 BF545B
+VU_I-GND-MESS NetU_I-GND-MESS_1 0 0
 VU_mess NetT2_3 NetIC1_16 0
 VU_messref NetR_E_2 NetIC2_7 0
-VU_neg 0 Vee 15
-VU_pos Vcc 0 15
+VU_neg NetU_I-GND-MESS_1 Vee 15
+VU_pos Vcc NetU_I-GND-MESS_1 15
 VU_var NetR_CV_1 0 1
 
 .PLOT TRAN {v(U_SQR)} =PLOT(2) =AXIS(1) =NAME(U_SQR) =UNITS(V)
 .PLOT TRAN {v(U_TRI)} =PLOT(1) =AXIS(1) =NAME(U_TRI) =UNITS(V)
 .PLOT TRAN {v(U_SAW)} =PLOT(3) =AXIS(1) =NAME(U_SAW) =UNITS(V)
 .PLOT TRAN {v(U_PWM)} =PLOT(4) =AXIS(1) =NAME(PWM) =UNITS(V)
+.PLOT TRAN {i(U_I-GND-MESS)} =PLOT(5) =AXIS(1) =NAME(I_GND) =UNITS(A)
 
 .OPTIONS ITL4=100 METHOD=GEAR MAXORD=2
 *Selected Circuit Analyses:

dev/digital/DAC_MCP4728/DAC_MCP4728.PrjPcbStructure

@@ -0,0 +1 @@
+Record=TopLevelDocument|FileName=DAC_MCP4728.SchDoc|SheetNumber=1

dev/digital/DAC_MCP4728_Test/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

dev/digital/DAC_MCP4728_Test/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

dev/digital/DAC_MCP4728_Test/include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

dev/digital/DAC_MCP4728_Test/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

dev/digital/DAC_MCP4728_Test/platformio.ini

@@ -0,0 +1,16 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32-s3-devkitm-1]
+platform = espressif32
+board = esp32-s3-devkitm-1
+framework = arduino
+build_flags = -DARDUINO_USB_MODE=1 -DARDUINO_USB_CDC_ON_BOOT=1 -DARDUINO_USB_JTAG_ON_BOOT=1
+lib_deps = adafruit/Adafruit MCP4728@^1.0.10

dev/digital/DAC_MCP4728_Test/src/main.cpp

@@ -0,0 +1,57 @@
+#include <Wire.h>
+#include <Adafruit_MCP4728.h>
+
+#define BAUDRATE  115200
+
+#define I2C_SDA   15
+#define I2C_SCL   16
+#define I2C_FREQ  400000
+
+#define DAC_MAX   4095
+#define DAC_MIN   0
+#define VREF_mV   5000
+
+Adafruit_MCP4728 mcp;
+
+static uint16_t value_mV = VREF_mV;
+
+uint16_t voltage(uint16_t mV)
+{
+  return map(mV, 0, VREF_mV, DAC_MIN, DAC_MAX);
+}
+
+void setup() 
+{
+  Serial.begin(BAUDRATE);
+  delay(1000);
+  Serial.print("\n\r--- ESP32-S3 + MCP4728 DAC Test ---");
+
+  Wire.begin(I2C_SDA, I2C_SCL);
+  Wire.setClock(I2C_FREQ);
+
+  Serial.print("\n\rInitialisiere MCP4728...");
+  uint8_t attempts = 0;
+  while (!mcp.begin()) 
+  {
+    Serial.print(".");
+    delay(100);
+  }
+  Serial.print("\n\rErfolgreich verbunden!");
+
+  mcp.setChannelValue(MCP4728_CHANNEL_A, 0, MCP4728_VREF_INTERNAL, MCP4728_GAIN_2X);
+  Serial.print("\n\rDAC-Kanal A auf 0 gesetzt");
+  delay(1000);
+}
+
+
+void loop() 
+{
+  value_mV = 200;
+  bool success = mcp.setChannelValue(MCP4728_CHANNEL_A, voltage(value_mV));
+
+  if (success) Serial.printf("DAC A = %u -> mV: %u\r\n", voltage(value_mV), value_mV);
+  else Serial.println("Schreibfehler am MCP4728!");
+  delay(200);
+
+  //value_mV = value_mV > 0 ? value_mV/2 : VREF_mV;
+}

dev/digital/DAC_MCP4728_Test/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html