Waveform Generator added

PWMTest/src/main.cpp

@@ -11,7 +11,7 @@ void setup() {
   // Initialize channels
   // channels 0-15, resolution 1-16 bits, freq limits depend on resolution
   // ledcSetup(uint8_t channel, uint32_t freq, uint8_t resolution_bits);
-  ledcSetup(0, 4000, 8); // 12 kHz PWM, 8-bit resolution
+  ledcSetup(0, 12000, 8); // 12 kHz PWM, 8-bit resolution
 }
 
 // the loop routine runs over and over again forever:
@@ -22,7 +22,7 @@ void loop() {
   brightness = brightness + fadeAmount;
 
   // reverse the direction of the fading at the ends of the fade:
-  if (brightness <= 0 || brightness >= 255) {
+  if (brightness <= 0 || brightness >= 254) {
     fadeAmount = -fadeAmount;
   }
   // wait for 30 milliseconds to see the dimming effect

WaveFormGenerator/.gitignore

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

WaveFormGenerator/.vscode/extensions.json

@@ -0,0 +1,7 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ]
+}

WaveFormGenerator/include/README

@@ -0,0 +1,39 @@
+
+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 usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+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

WaveFormGenerator/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 executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, 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
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

WaveFormGenerator/platformio.ini

@@ -0,0 +1,14 @@
+; 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:esp32doit-devkit-v1]
+platform = espressif32
+board = esp32doit-devkit-v1
+framework = arduino

WaveFormGenerator/src/WaveformGenerator.cpp

@@ -0,0 +1,63 @@
+#include <Arduino.h>
+
+#define Num_Samples  112   //  number of dample of signal
+#define MaxWaveTypes 4   // types of wave (signal)
+int i = 0;
+
+static byte WaveFormTable[MaxWaveTypes][Num_Samples] = {
+   // Sin wave
+   { 
+    0x80, 0x83, 0x87, 0x8A, 0x8E, 0x91, 0x95, 0x98, 0x9B, 0x9E, 0xA2, 0xA5, 0xA7, 0xAA, 0xAD, 0xAF,
+    0xB2, 0xB4, 0xB6, 0xB8, 0xB9, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xBF, 0xBF, 0xC0, 0xBF, 0xBF, 0xBF,
+    0xBE, 0xBD, 0xBC, 0xBB, 0xB9, 0xB8, 0xB6, 0xB4, 0xB2, 0xAF, 0xAD, 0xAA, 0xA7, 0xA5, 0xA2, 0x9E,
+    0x9B, 0x98, 0x95, 0x91, 0x8E, 0x8A, 0x87, 0x83, 0x80, 0x7C, 0x78, 0x75, 0x71, 0x6E, 0x6A, 0x67,
+    0x64, 0x61, 0x5D, 0x5A, 0x58, 0x55, 0x52, 0x50, 0x4D, 0x4B, 0x49, 0x47, 0x46, 0x44, 0x43, 0x42,
+    0x41, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x41, 0x42, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4B,
+    0x4D, 0x50, 0x52, 0x55, 0x58, 0x5A, 0x5D, 0x61, 0x64, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C
+   },
+   // Triangular wave table
+   {
+     0x80, 0x84, 0x89, 0x8D, 0x92, 0x96, 0x9B, 0x9F, 0xA4, 0xA8, 0xAD, 0xB2, 0xB6, 0xBB, 0xBF, 0xC4,
+     0xC8, 0xCD, 0xD1, 0xD6, 0xDB, 0xDF, 0xE4, 0xE8, 0xED, 0xF1, 0xF6, 0xFA, 0xFF, 0xFA, 0xF6, 0xF1,
+     0xED, 0xE8, 0xE4, 0xDF, 0xDB, 0xD6, 0xD1, 0xCD, 0xC8, 0xC4, 0xBF, 0xBB, 0xB6, 0xB2, 0xAD, 0xA8,
+     0xA4, 0x9F, 0x9B, 0x96, 0x92, 0x8D, 0x89, 0x84, 0x7F, 0x7B, 0x76, 0x72, 0x6D, 0x69, 0x64, 0x60,
+     0x5B, 0x57, 0x52, 0x4D, 0x49, 0x44, 0x40, 0x3B, 0x37, 0x32, 0x2E, 0x29, 0x24, 0x20, 0x1B, 0x17,
+     0x12, 0x0E, 0x09, 0x05, 0x00, 0x05, 0x09, 0x0E, 0x12, 0x17, 0x1B, 0x20, 0x24, 0x29, 0x2E, 0x32,
+     0x37, 0x3B, 0x40, 0x44, 0x49, 0x4D, 0x52, 0x57, 0x5B, 0x60, 0x64, 0x69, 0x6D, 0x72, 0x76, 0x7B
+  },
+
+   // Sawtooth wave table
+   {
+     0x00, 0x02, 0x04, 0x06, 0x09, 0x0B, 0x0D, 0x10, 0x12, 0x14, 0x16, 0x19, 0x1B, 0x1D, 0x20, 0x22,
+     0x24, 0x27, 0x29, 0x2B, 0x2D, 0x30, 0x32, 0x34, 0x37, 0x39, 0x3B, 0x3E, 0x40, 0x42, 0x44, 0x47,
+     0x49, 0x4B, 0x4E, 0x50, 0x52, 0x54, 0x57, 0x59, 0x5B, 0x5E, 0x60, 0x62, 0x65, 0x67, 0x69, 0x6B, 
+     0x6E, 0x70, 0x72, 0x75, 0x77, 0x79, 0x7C, 0x7E, 0x80, 0x82, 0x85, 0x87, 0x89, 0x8C, 0x8E, 0x90,
+     0x93, 0x95, 0x97, 0x99, 0x9C, 0x9E, 0xA0, 0xA3, 0xA5, 0xA7, 0xA9, 0xAC, 0xAE, 0xB0, 0xB3, 0xB5,
+     0xB7, 0xBA, 0xBC, 0xBE, 0xC0, 0xC3, 0xC5, 0xC7, 0xCA, 0xCC, 0xCE, 0xD1, 0xD3, 0xD5, 0xD7, 0xDA,
+     0xDC, 0xDE, 0xE1, 0xE3, 0xE5, 0xE8, 0xEA, 0xEC, 0xEE, 0xF1, 0xF3, 0xF5, 0xF8, 0xFA, 0xFC, 0xFE
+   },
+   // Square wave table
+   {
+     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+     0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+   }
+};
+
+void setup() {
+  Serial.begin(115200);  // serial monitor at 115200 bps
+}
+ 
+void loop() {
+    byte wave_type = 0; // Sine
+  //byte wave_type = 1; // Triangle
+  //byte wave_type = 2; // Sawtooth
+   //byte wave_type = 3; // Square command
+  dacWrite(25, WaveFormTable[wave_type][i]);   //  output wave form
+  i++;
+  if (i >= Num_Samples) i = 0; 
+}

WaveFormGenerator/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Unit Testing 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/page/plus/unit-testing.html