v1.0.0 for PWM Continuous Stepper Control

### Initial Releases v1.0.0

1. Initial coding to use PWM to control continuous Stepper Motor. Check [Using PWM to step a stepper driver #16](https://github.com/khoih-prog/ContinuousStepper_Generic/issues/16)
2. Use `allman astyle` and add `utils`

.codespellrc

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+# See: https://github.com/codespell-project/codespell#using-a-config-file
+[codespell]
+# In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
+ignore-words-list = ,
+check-filenames =
+check-hidden =
+skip = ./.git,./src,./examples,./Packages_Patches,./LibraryPatches

CONTRIBUTING.md

@@ -0,0 +1,79 @@
+## Contributing to ContinuousStepper_Generic
+
+### Reporting Bugs
+
+Please report bugs in [ContinuousStepper_Generic Issues](https://github.com/khoih-prog/ContinuousStepper_Generic/issues) if you find them.
+
+However, before reporting a bug please check through the following:
+
+* [Existing Open Issues](https://github.com/khoih-prog/ContinuousStepper_Generic/issues) - someone might have already encountered this.
+
+If you don't find anything, please [open a new issue](https://github.com/khoih-prog/ContinuousStepper_Generic/issues/new).
+
+---
+
+### How to submit a bug report
+
+Please ensure to specify the following:
+
+* Arduino IDE version (e.g. 1.8.19) or Platform.io version
+* Board Core Version (e.g. Arduino SAMDUE core v1.6.12, ESP32 core v2.0.6, ESP8266 core v3.1.1, ArduinoCore-mbed v3.5.4, etc.)
+* Contextual information (e.g. what you were trying to achieve)
+* Simplest possible steps to reproduce
+* Anything that might be relevant in your opinion, such as:
+  * Operating system (Windows, Ubuntu, etc.) and the output of `uname -a`
+  * Network configuration
+
+Please be educated, civilized and constructive as you've always been. Disrespective posts against [GitHub Code of Conduct](https://docs.github.com/en/site-policy/github-terms/github-event-code-of-conduct) will be ignored and deleted.
+
+---
+
+### Example
+
+```
+Arduino IDE version: 1.8.19
+Arduino-mbed mbed_nano v3.5.4
+NANO_RP2040_CONNECT Module
+OS: Ubuntu 21.04 LTS
+Linux xy-Inspiron-3593 5.15.0-58-generic #64~20.04.1-Ubuntu SMP Fri Jan 6 16:42:31 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
+
+Context:
+I encountered a crash while using this library
+
+Steps to reproduce:
+1. ...
+2. ...
+3. ...
+4. ...
+```
+
+---
+
+### Sending Feature Requests
+
+Feel free to post feature requests. It's helpful if you can explain exactly why the feature would be useful.
+
+There are usually some outstanding feature requests in the [existing issues list](https://github.com/khoih-prog/ContinuousStepper_Generic/issues?q=is%3Aopen+is%3Aissue+label%3Aenhancement), feel free to add comments to them.
+
+---
+
+### Sending Pull Requests
+
+Pull Requests with changes and fixes are also welcome!
+
+Please use the `astyle` to reformat the updated library code as follows (demo for Ubuntu Linux)
+
+1. Change directory to the library GitHub
+
+```
+xy@xy-Inspiron-3593:~$ cd Arduino/xy/ContinuousStepper_Generic_GitHub/
+xy@xy-Inspiron-3593:~/Arduino/xy/ContinuousStepper_Generic_GitHub$
+```
+
+2. Issue astyle command
+
+```
+xy@xy-Inspiron-3593:~/Arduino/xy/ContinuousStepper_Generic_GitHub$ bash utils/restyle.sh
+```
+
+

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 Khoi Hoang
+Copyright (c) 2021 Khoi Hoang
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

changelog.md

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+# ContinuousStepper_Generic Library
+
+[![arduino-library-badge](https://www.ardu-badge.com/badge/ContinuousStepper_Generic.svg?)](https://www.ardu-badge.com/ContinuousStepper_Generic)
+[![GitHub release](https://img.shields.io/github/release/khoih-prog/ContinuousStepper_Generic.svg)](https://github.com/khoih-prog/ContinuousStepper_Generic/releases)
+[![GitHub](https://img.shields.io/github/license/mashape/apistatus.svg)](https://github.com/khoih-prog/ContinuousStepper_Generic/blob/main/LICENSE)
+[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
+[![GitHub issues](https://img.shields.io/github/issues/khoih-prog/ContinuousStepper_Generic.svg)](http://github.com/khoih-prog/ContinuousStepper_Generic/issues)
+
+
+
+<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Donate to my libraries using BuyMeACoffee" style="height: 50px !important;width: 181px !important;" ></a>
+<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://img.shields.io/badge/buy%20me%20a%20coffee-donate-orange.svg?logo=buy-me-a-coffee&logoColor=FFDD00" style="height: 20px !important;width: 200px !important;" ></a>
+
+
+---
+---
+
+## Table of Contents
+
+* [Changelog](#changelog)
+  * [Initial Releases v1.0.0](#Initial-Releases-v100)
+
+---
+---
+
+## Changelog
+
+### Initial Releases v1.0.0
+
+1. Initial coding to use PWM to control continuous Stepper Motor. Check [Using PWM to step a stepper driver #16](https://github.com/khoih-prog/ContinuousStepper_Generic/issues/16)
+2. Use `allman astyle` and add `utils`
+

examples/ATtiny_PWM_StepperControl/ATtiny_PWM_StepperControl.ino

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+/****************************************************************************************************************************
+  ATtiny_PWM_StepperControl.ino
+  For Arduino AVR ATtiny-based boards (ATtiny3217, etc.) using megaTinyCore
+  Written by Khoi Hoang
+
+  Built by Khoi Hoang https://github.com/khoih-prog/ContinuousStepper_Generic
+  Licensed under MIT license
+
+  Credits of Paul van Dinther (https://github.com/dinther). Check https://github.com/khoih-prog/RP2040_PWM/issues/16
+*****************************************************************************************************************************/
+
+// Use with Stepper-Motor driver, such as TMC2209
+
+#if !defined(MEGATINYCORE)
+  #error This is designed only for AVR_ATtiny boards using megaTinyCore
+#endif
+
+#define _PWM_LOGLEVEL_       4
+
+// Select false to use PWM
+#define USING_TIMER       false   //true
+
+#include "ContinuousStepper_Generic.h"
+
+/*
+  const uint8_t digital_pin_to_timer[] = {
+  // Left side, top to bottom
+  TIMERA0,         // 0  PA4 WO4 WOA
+  TIMERA0,         // 1  PA5 WO5 WOB
+  #if defined(DAC0)
+  DACOUT,           // 2  PA6
+  #else
+  NOT_ON_TIMER,     // 2  PA6
+  #endif
+  NOT_ON_TIMER,     // 3  PA7
+  NOT_ON_TIMER,     // 4  PB7
+  NOT_ON_TIMER,     // 5  PB6
+  NOT_ON_TIMER,     // 6  PB5 WO2 Alt
+  NOT_ON_TIMER,     // 7  PB4 WO1 Alt
+  NOT_ON_TIMER,     // 8  PB3 WO0 Alt
+  TIMERA0,          // 9  PB2 WO2
+  TIMERA0,          // 10 PB1 WO1
+  // Right side, bottom to top
+  TIMERA0,          // 11 PB0 WO0
+  #if (defined(TCD0) && defined(USE_TIMERD0_PWM))
+  TIMERD0,          // 12 PC0 WOC
+  TIMERD0,          // 13 PC1 WOD
+  #else
+  NOT_ON_TIMER,     // 12 PC0
+  NOT_ON_TIMER,     // 13 PC1
+  #endif
+  NOT_ON_TIMER,     // 14 PC2
+  NOT_ON_TIMER,     // 15 PC3 WO3 Alt
+  NOT_ON_TIMER,     // 16 PC4 WO4 Alt
+  NOT_ON_TIMER,     // 17 PC5 WO5 Alt
+  NOT_ON_TIMER,     // 18 PA1
+  NOT_ON_TIMER,     // 19 PA2
+  TIMERA0,          // 20 PA3 WO3
+  NOT_ON_TIMER      // 21 PA0
+  };
+*/
+
+// OK, only PIN_PA4-5:TCA0
+// PIN_PC0-1: TCD0 => not OK yet for frequency
+// Not OK, PIN_PA6, 7, PIN_PB0-2:TCA0
+
+#define STEP_PIN          PIN_PA5    //PIN_PB4
+
+#define DIR_PIN           PIN_PA6
+
+ATtiny_PWM* stepper;
+
+// The Stepper RPM will be ( speed * 60 ) / steps-per-rev
+// For example, 28BYJ-48 Stepper Motor (https://lastminuteengineers.com/28byj48-stepper-motor-arduino-tutorial/) has 32 Steps/Rev
+// Speed = 640 Hz => Stepper RPM = (640 * 60 / 32) = 1200 RPM
+void setSpeed(int speed)
+{
+  if (speed == 0)
+  {
+    // Use DC = 0 to stop stepper
+    stepper->setPWM(STEP_PIN, 500, 0);
+  }
+  else
+  {
+    //  Set the frequency of the PWM output and a duty cycle of 50%
+    digitalWrite(DIR_PIN, (speed < 0));
+    stepper->setPWM(STEP_PIN, abs(speed), 50);
+  }
+}
+
+void setup() 
+{
+  pinMode(DIR_PIN, OUTPUT);
+
+  Serial.begin(115200);
+
+  while (!Serial && millis() < 5000);
+
+  delay(100);
+
+  Serial.print(F("\nStarting ATtiny_PWM_StepperControl on "));
+  Serial.println(BOARD_NAME);
+  Serial.println(AT_TINY_PWM_VERSION);
+  Serial.println(CONTINUOUS_STEPPER_GENERIC_VERSION);
+
+  // Create PWM object and passed just a random frequency of 500
+  // The duty cycle is how you turn the motor on and off
+  stepper = new ATtiny_PWM(STEP_PIN, 500, 0);
+}
+
+void loop() 
+{
+  // The Stepper RPM will be ( speed * 60 ) / steps-per-rev
+  setSpeed(1000);
+  delay(3000);
+
+  // Stop before reversing
+  setSpeed(0);
+  delay(3000);
+
+  // Reversing
+  setSpeed(-500);
+  delay(3000);
+
+  // Stop before reversing
+  setSpeed(0);
+  delay(3000);
+}