ATtiny_PWM

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This library enables you to use Hardware-based PWM channels on Arduino AVR ATtiny-based boards (ATtiny3217, etc.), using megaTinyCore, to create and output PWM to pins. Using the same functions as other FastPWM libraries to enable you to port PWM code easily between platforms

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# ATtiny_PWM Library

[![arduino-library-badge](https://www.ardu-badge.com/badge/ATtiny_PWM.svg?)](https://www.ardu-badge.com/ATtiny_PWM)
[![GitHub release](https://img.shields.io/github/release/khoih-prog/ATtiny_PWM.svg)](https://github.com/khoih-prog/ATtiny_PWM/releases)
[![GitHub](https://img.shields.io/github/license/mashape/apistatus.svg)](https://github.com/khoih-prog/ATtiny_PWM/blob/main/LICENSE)
[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://raw.githubusercontent.com/khoih-prog/ATtiny_PWM/main/)
[![GitHub issues](https://img.shields.io/github/issues/khoih-prog/ATtiny_PWM.svg)](http://github.com/khoih-prog/ATtiny_PWM/issues)

---
---

## Table of Contents

* [Important Note for Arduino IDE](#Important-Note-for-Arduino-IDE)
* [Why do we need this ATtiny_PWM library](#why-do-we-need-this-ATtiny_PWM-library)
  * [Features](#features)
  * [Why using hardware-based PWM is better](#why-using-hardware-based-pwm-is-better)
  * [Currently supported Boards](#currently-supported-boards)
* [Changelog](changelog.md)
* [Prerequisites](#prerequisites)
* [Installation](#installation)
  * [Use Arduino Library Manager](#use-arduino-library-manager)
  * [Manual Install](#manual-install)
  * [VS Code & PlatformIO](#vs-code--platformio)
* [More useful Information](#more-useful-information)
  * [1. Documents](#1-documents)
  * [2. Timer TCB0-TCB1](#2-timer-tcb0-tcb1)
* [Usage](#usage)
  * [1. Create PWM Instance with Pin, Frequency, dutycycle](#1-create-pwm-instance-with-pin-frequency-dutycycle)
  * [2. Initialize PWM Instance](#2-Initialize-PWM-Instance)
  * [3. Set or change PWM frequency or dutyCycle](#3-set-or-change-PWM-frequency-or-dutyCycle)
  * [4. Set or change PWM frequency and dutyCycle manually and efficiently in waveform creation](#4-Set-or-change-PWM-frequency-and-dutyCycle-manually-and-efficiently-in-waveform-creation)
* [Examples](#examples)
  * [ 1. PWM_Basic](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Basic)
  * [ 2. PWM_DynamicDutyCycle](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicDutyCycle) 
  * [ 3. PWM_DynamicDutyCycle_Int](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicDutyCycle_Int)
  * [ 4. PWM_DynamicFreq](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicFreq)
  * [ 5. PWM_Multi](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Multi)
  * [ 6. PWM_MultiChannel](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_MultiChannel)
  * [ 7. PWM_Waveform](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Waveform)
  * [ 8. PWM_StepperControl](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_StepperControl) **New**
  * [ 9. PWM_manual](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_manual) **New**
  * [10. PWM_SpeedTest](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_SpeedTest) **New**
* [Example PWM_Multi](#example-PWM_Multi)
* [Debug Terminal Output Samples](#debug-terminal-output-samples)
  * [1. PWM_DynamicDutyCycle on AVR_ATtiny3217](#1-PWM_DynamicDutyCycle-on-AVR_ATtiny3217)
  * [2. PWM_Multi on AVR_ATtiny3217](#2-PWM_Multi-using-QuadTimers-on-AVR_ATtiny3217)
  * [3. PWM_DynamicFreq on AVR_ATtiny3217](#3-PWM_DynamicFreq-on-AVR_ATtiny3217)
  * [4. PWM_Waveform on AVR_ATtiny3217](#4-PWM_Waveform-on-AVR_ATtiny3217)
  * [5. PWM_manual on AVR_ATtiny3217](#5-PWM_manual-on-AVR_ATtiny3217)
  * [6. PWM_SpeedTest on AVR_ATtiny3217](#6-PWM_SpeedTest-on-AVR_ATtiny3217)
* [Debug](#debug)
* [Troubleshooting](#troubleshooting)
* [Issues](#issues)
* [TO DO](#to-do)
* [DONE](#done)
* [Contributions and Thanks](#contributions-and-thanks)
* [Contributing](#contributing)
* [License](#license)
* [Copyright](#copyright)

---
---

### Important Note for Arduino IDE

With some Arduino IDE versions, such as v1.8.19, upload directly via USB to some boards, such as `AVR_CuriosityNano3217` can't be done without `unknown-to-me` fix. We'll get the following error when uploading

```
avrdude: Version 6.3-20201216
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "/home/kh/.arduino15/packages/megaTinyCore/hardware/megaavr/2.5.11/avrdude.conf"
         User configuration file is "/home/kh/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

Using Port                    : usb
         Using Programmer              : curiosity_updi
avrdude: usbdev_open(): Found nEDBG CMSIS-DAP, serno: MCHP3333021800000998
avrdude: usbdev_open(): WARNING: failed to set configuration 1: Device or resource busy
avrdude: Found CMSIS-DAP compliant device, using EDBG protocol
avrdude: usbdev_send(): wrote -5 out of 912 bytes, err = Input/output error
avrdude: jtag3_edbg_prepare(): failed to send command to serial port

avrdude done.  Thank you.

the selected serial port 
 does not exist or your board is not connected
```

We can use drag-and-drop method to `drag-and-drop` the compiled **hex** file to `CURIOSITY` virtual drive.

If `success`, The LED blinks **slowly** for 2 sec, or **rapidly** for 2 sec if `failure`

For example, to run [Change_Interval example](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/Change_Interval), use Arduino IDE to compile, and get the `Change_Interval.ino.hex` file. For Ubuntu Linux, the file is stored in directory `/tmp/arduino_build_xxxxxx`

After drag-and-drop the `Change_Interval.ino.hex` into `CURIOSITY` virtual drive, the code will run immediately if successfully loaded (LED blinks **slowly**)

---
---

### Why do we need this [ATtiny_PWM library](https://github.com/khoih-prog/ATtiny_PWM)

### Features

This hardware-based PWM library, a wrapper and enhancement around `megaTinyCore analogWrite()` code, enables you to use Hardware-PWM on **Arduino AVR ATtiny-based boards (ATtiny3217, etc.)** using [**megaTinyCore**](https://github.com/SpenceKonde/megaTinyCore), to create and output PWM. These purely hardware-based PWM channels can generate very high PWM frequencies, depending on CPU clock and acceptable accuracy. The maximum and default resolution is **8-bit** resolution.

This library is using the **same or similar functions** as other FastPWM libraries, as follows, to enable you to **port your PWM code easily between platforms**

1. [**RP2040_PWM**](https://github.com/khoih-prog/RP2040_PWM)
 2. [**AVR_PWM**](https://github.com/khoih-prog/AVR_PWM)
 3. [**megaAVR_PWM**](https://github.com/khoih-prog/megaAVR_PWM)
 4. [**ESP32_FastPWM**](https://github.com/khoih-prog/ESP32_FastPWM)
 5. [**SAMD_PWM**](https://github.com/khoih-prog/SAMD_PWM)
 6. [**SAMDUE_PWM**](https://github.com/khoih-prog/SAMDUE_PWM)
 7. [**nRF52_PWM**](https://github.com/khoih-prog/nRF52_PWM)
 8. [**Teensy_PWM**](https://github.com/khoih-prog/Teensy_PWM)
 9. [**ATtiny_PWM**](https://github.com/khoih-prog/ATtiny_PWM)
10. [**Dx_PWM**](https://github.com/khoih-prog/Dx_PWM)
11. [**Portenta_H7_PWM**](https://github.com/khoih-prog/Portenta_H7_PWM)
12. [**MBED_RP2040_PWM**](https://github.com/khoih-prog/MBED_RP2040_PWM)
13. [**nRF52_MBED_PWM**](https://github.com/khoih-prog/nRF52_MBED_PWM)
14. [**STM32_PWM**](https://github.com/khoih-prog/STM32_PWM)

---

The most important feature is they're purely hardware-based PWM channels. Therefore, their operations are **not blocked by bad-behaving software functions / tasks**.

This important feature is absolutely necessary for mission-critical tasks. These hardware PWM-channels, still work even if other software functions are blocking. Moreover, they are much more precise (certainly depending on clock frequency accuracy) than other software timers using `millis()` or `micros()`. That's necessary if you need to control external systems (Servo, etc.) requiring better accuracy.

New efficient `setPWM_manual()` function enables waveform creation using PWM.

The [**PWM_Multi**](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Multi) example will demonstrate the usage of multichannel PWM using multiple Hardware-PWM blocks (Timer & Channel). The 2 independent Hardware-PWM channels are used **to control 2 different PWM outputs**, with totally independent frequencies and dutycycles on `ATtiny-based boards`.

Being hardware-based PWM, their executions are not blocked by bad-behaving functions / tasks, such as connecting to WiFi, Internet or Blynk services.

This non-being-blocked important feature is absolutely necessary for mission-critical tasks.

---

### Why using hardware-based PWM is better

Imagine you have a system with a **mission-critical** function, controlling a robot or doing something much more important. You normally use a software timer to poll, or even place the function in `loop()`. But what if another function is **blocking** the `loop()` or `setup()`.

So your function **might not be executed, and the result would be disastrous.**

You'd prefer to have your function called, no matter what happening with other functions (busy loop, bug, etc.).

The correct choice is to use `hardware-based PWM`.

These hardware-based PWM channels still work even if other software functions are blocking. Moreover, they are much more **precise** (certainly depending on clock frequency accuracy) than other software-based PWMs, using `millis()` or `micros()`.

Functions using normal software-based PWMs, relying on `loop()` and calling `millis()`, won't work if the `loop()` or `setup()` is blocked by certain operation. For example, certain function is blocking while it's connecting to WiFi or some services.

---

### Currently supported Boards

- **tinyAVR boards using megaTinyCore**

##### Curiosity Nano ATtiny3217

---
---

## Prerequisites

1. [`Arduino IDE 1.8.19+` for Arduino](https://github.com/arduino/Arduino). [![GitHub release](https://img.shields.io/github/release/arduino/Arduino.svg)](https://github.com/arduino/Arduino/releases/latest)
 2. [`SpenceKonde megaTinyCore core 2.6.4+`](https://github.com/SpenceKonde/megaTinyCore) for Arduino ATtiny boards.  [![GitHub release](https://img.shields.io/github/release/SpenceKonde/megaTinyCore.svg)](https://github.com/SpenceKonde/megaTinyCore/releases/latest). Follow [**megaTinyCore Installation**](https://github.com/SpenceKonde/megaTinyCore/blob/master/Installation.md).

---
---

## Installation

### Use Arduino Library Manager

The best and easiest way is to use `Arduino Library Manager`. Search for [**ATtiny_PWM**](https://github.com/khoih-prog/ATtiny_PWM), then select / install the latest version.
You can also use this link [![arduino-library-badge](https://www.ardu-badge.com/badge/ATtiny_PWM.svg?)](https://www.ardu-badge.com/ATtiny_PWM) for more detailed instructions.

### Manual Install

Another way to install is to:

1. Navigate to [**ATtiny_PWM**](https://github.com/khoih-prog/ATtiny_PWM) page.
2. Download the latest release `ATtiny_PWM-main.zip`.
3. Extract the zip file to `ATtiny_PWM-main` directory 
4. Copy whole `ATtiny_PWM-main` folder to Arduino libraries' directory such as `~/Arduino/libraries/`.

### VS Code & PlatformIO

1. Install [VS Code](https://code.visualstudio.com/)
2. Install [PlatformIO](https://platformio.org/platformio-ide)
3. Install [**ATtiny_PWM** library](https://registry.platformio.org/libraries/khoih-prog/ATtiny_PWM) by using [Library Manager](https://registry.platformio.org/libraries/khoih-prog/ATtiny_PWM/installation). Search for **ATtiny_PWM** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
4. Use included [platformio.ini](platformio/platformio.ini) file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at [Project Configuration File](https://docs.platformio.org/page/projectconf.html)

---
---

## More useful Information

### 1. Documents

1. [Arduino 101: Timers and Interrupts](https://www.robotshop.com/community/forum/t/arduino-101-timers-and-interrupts/13072)
2. [Getting Started with Timer/Counter Type B (TCB)](https://ww1.microchip.com/downloads/aemDocuments/documents/MCU08/ApplicationNotes/ApplicationNotes/TB3214-Getting-Started-with-TCB-DS90003214.pdf)
3. [megaTinyCore README.md](https://github.com/SpenceKonde/megaTinyCore/blob/master/README.md)
4. [ATtiny3217 Curiosity Nano Hardware User Guide](https://ww1.microchip.com/downloads/en/DeviceDoc/40002193A.pdf)
5. [AVR128DA48-Curiosity-Nano-Hardware-User Guide](https://ww1.microchip.com/downloads/en/DeviceDoc/AVR128DA48-Curiosity-Nano-UG-DS50002971B.pdf)
6. [AVR128DB48-Curiosity-Nano-Hardware-User Guide](https://ww1.microchip.com/downloads/en/DeviceDoc/AVR128DB48-Curiosity-Nano-HW-UserG-DS50003037A.pdf)

### 2. Timer TCB0-TCB1

TCB0-TCB1 are 16-bit timers

The ATtiny boards, such as `ATtiny3217`, `ATtiny1617`, will have only maximum 2 TCB timers, (TCB0-TCB1).

The ATtiny boards, such as `ATtiny817`, will have only maximum 1 TCB timer, (TCB0).

The number of TCB timers will be automatically configured by the library.

The following is the partial list of number of TCBs for each ATtiny board/chip

#### TCB0-TCB1, TCA, TCD

**ATtiny3217, ATtiny1617, ATtiny3216, ATtiny1616, ATtiny1614**

#### TCB0, TCA, TCD

**ATtinyx12, ATtinyx14, ATtinyx16, ATtinyx17, such as ATtiny817, ATtiny417, ATtiny816, etc.**

#### TCB0, TCA, no TCD

**ATtinyx02, ATtinyx04, ATtinyx06, ATtinyx07, such as ATtiny1607, ATtiny807, ATtiny1606, etc.**

---
---

## Usage

Before using any PWM `Timer` and `channel`, you have to make sure the `Timer` and `channel` has not been used by any other purpose.

#### 1. Create PWM Instance with Pin, Frequency, dutycycle

```cpp
ATtiny_PWM* PWM_Instance;

PWM_Instance = new ATtiny_PWM(pinToUse, frequency, dutyCycle, channel, PWM_resolution);
```

#### 2. Initialize PWM Instance

```cpp
if (PWM_Instance)
{
  PWM_Instance->setPWM();
}
```

#### 3. Set or change PWM frequency or dutyCycle

To use `float new_dutyCycle`

```cpp
PWM_Instance->setPWM(PWM_Pins, new_frequency, new_dutyCycle);
```

such as

```cpp
dutyCycle = 10.0f;
  
Serial.print(F("Change PWM DutyCycle to ")); Serial.println(dutyCycle);
PWM_Instance->setPWM(pinToUse, frequency, dutyCycle);
```

---

To use `uint32_t new_dutyCycle` = `(real_dutyCycle * 65536) / 100`

```cpp
PWM_Instance->setPWM_Int(PWM_Pins, new_frequency, new_dutyCycle);
```

such as for `real_dutyCycle = 50%`

```cpp
// 50% dutyCycle = (real_dutyCycle * 65536) / 100
dutyCycle = 32768;

Serial.print(F("Change PWM DutyCycle to (%) "));
Serial.println((float) dutyCycle * 100 / 65536);
PWM_Instance->setPWM_Int(pinToUse, frequency, dutyCycle);
```

for `real_dutyCycle = 50%`

```cpp
// 20% dutyCycle = (real_dutyCycle * 65536) / 100
dutyCycle = 13107;

Serial.print(F("Change PWM DutyCycle to (%) "));
Serial.println((float) dutyCycle * 100 / 65536);
PWM_Instance->setPWM_Int(pinToUse, frequency, dutyCycle);
```

#### 4. Set or change PWM frequency and dutyCycle manually and efficiently in waveform creation

Function prototype

```cpp
bool setPWM_manual(const uint8_t& pin, const uint16_t& DCValue);
bool setPWM_DCPercentage_manual(const uint8_t& pin, const float& DCPercentage);
bool setPWM_DCPercentageInt_manual(const uint8_t& pin, const uint16_t& DCPercentage);
```

Need to call only once for each pin

```cpp
PWM_Instance->setPWM(PWM_Pins, frequency, dutyCycle);
```

after that, if just changing `dutyCycle` / `level`, use the `faster`

```cpp
// For 50.0f dutycycle
// 97465ns
new_level = 50.0f * PWM_Instance->getPWMPeriod() / 100.0f ;
PWM_Instance->setPWM_manual(PWM_Pins, new_level);
```

or better and much easier to use, but `slowest`

```cpp
// v1.2.0: 129500ns. Previous v1.1.0 : 169577ns
new_DCPercentage = 50.0f;
PWM_Instance->setPWM_DCPercentage_manual(PWM_Pins, new_DCPercentage);
```

or the **fastest**

```cpp
// dutycyclePercent = 0-65535 == 0-100%
// Faster, 94197ns
dutycyclePercentInt = MAX_16BIT / 2;   // 50%
PWM_Instance->setPWM_DCPercentageInt_manual(pinToUse, dutycyclePercentInt);
```

---
---

### Examples:

1. [PWM_Basic](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Basic)
 2. [PWM_DynamicDutyCycle](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicDutyCycle)
 3. [PWM_DynamicDutyCycle_Int](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicDutyCycle_Int)
 4. [PWM_DynamicFreq](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicFreq)
 5. [PWM_Multi](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Multi)
 6. [PWM_MultiChannel](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_MultiChannel)
 7. [PWM_Waveform](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Waveform)
 8. [PWM_StepperControl](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_StepperControl) **New**
 9. [PWM_manual](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_manual) **New**
10. [PWM_SpeedTest](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_SpeedTest) **New**
 
---
---

### Example [PWM_Multi](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Multi)

https://github.com/khoih-prog/ATtiny_PWM/blob/5e2c8076e07ff5bd60b23753dbc66d8a8ebf4c74/examples/PWM_Multi/PWM_Multi.ino#L11-L141

---
---

### Debug Terminal Output Samples

### 1. PWM_DynamicDutyCycle on AVR_ATtiny3217

The following is the sample terminal output when running example [PWM_DynamicDutyCycle](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicDutyCycle) on **AVR_ATtiny3217**, to demonstrate the ability to provide high PWM frequencies and ability to change DutyCycle `on-the-fly`

```cpp
Starting PWM_DynamicDutyCycle on AVR_ATtiny3217
ATtiny_PWM v1.2.0
[PWM] ATtiny_PWM: freq = 5000.00
[PWM] ATtiny_PWM: _dutycycle = 0
=====================================================================================
Change PWM DutyCycle to 90.00
[PWM] setPWM: _dutycycle = 58982 , frequency = 5000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 200 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 62 , _actualFrequency = 5040
[PWM] setPWM_Int: TIMERA0, _dutycycle = 58982 , dutycycle = 56
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 56 , actual DC% = 90.48
=====================================================================================
Actual data: pin = 1, PWM DC = 90.00, PWMPeriod = 200.00, PWM Freq (Hz) = 5000.0000
=====================================================================================
Change PWM DutyCycle to 20.00
[PWM] setPWM: _dutycycle = 13107 , frequency = 5000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 200 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 62 , _actualFrequency = 5040
[PWM] setPWM_Int: TIMERA0, _dutycycle = 13107 , dutycycle = 12
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 12 , actual DC% = 20.63
=====================================================================================
Actual data: pin = 1, PWM DC = 20.00, PWMPeriod = 200.00, PWM Freq (Hz) = 5000.0000
=====================================================================================
Change PWM DutyCycle to 90.00
[PWM] setPWM: _dutycycle = 58982 , frequency = 5000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 200 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 62 , _actualFrequency = 5040
[PWM] setPWM_Int: TIMERA0, _dutycycle = 58982 , dutycycle = 56
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 56 , actual DC% = 90.48
=====================================================================================
Actual data: pin = 1, PWM DC = 90.00, PWMPeriod = 200.00, PWM Freq (Hz) = 5000.0000
=====================================================================================
```

---

### 2. PWM_Multi on AVR_ATtiny3217

The following is the sample terminal output when running example [**PWM_Multi**](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Multi) on **TAVR_ATtiny3217**, to demonstrate the ability to provide high PWM frequencies on multiple `PWM-capable` pins

```cpp
Starting PWM_Multi on AVR_ATtiny3217
ATtiny_PWM v1.2.0
[PWM] ATtiny_PWM: freq = 2000.00 , _dutycycle = 19660
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 0 dutycycle = 47 , actual DC% = 30.57
[PWM] ATtiny_PWM: freq = 8000.00 , _dutycycle = 58981
[PWM] setPWM_Int: TIMERD0, _dutycycle = 58981 , dutycycle = 229
[PWM] setPWM_Int 3: TCD0 pin = 12 dutycycle = 229
=====================================================================================
Index	Pin	PWM_freq	DutyCycle	Actual Freq
=====================================================================================
0	0	2000.00		30.00		2000.0000
1	12	8000.00		90.00		8000.0000
=====================================================================================
Actual data: pin = 0, PWM DC = 30.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=====================================================================================
=====================================================================================
Actual data: pin = 12, PWM DC = 90.00, PWMPeriod = 125.00, PWM Freq (Hz) = 8000.0000
=====================================================================================
```

---

### 3. PWM_DynamicFreq on AVR_ATtiny3217

The following is the sample terminal output when running example [**PWM_DynamicFreq**](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_DynamicFreq) on **AVR_ATtiny3217**, to demonstrate the ability to change dynamically PWM frequencies

```cpp
Starting PWM_DynamicFreq on AVR_ATtiny3217
ATtiny_PWM v1.2.0
[PWM] ATtiny_PWM: freq = 10000.00
[PWM] ATtiny_PWM: _dutycycle = 32767
=====================================================================================
Change PWM Freq to 20000.00
[PWM] setPWM: _dutycycle = 32768 , frequency = 20000.00
[PWM] setPWM_Int: new freq = 20000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 50 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 15 , _actualFrequency = 20833
[PWM] setPWM_Int: TIMERA0, _dutycycle = 32768 , dutycycle = 8
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 8 , actual DC% = 56.25
=====================================================================================
Actual data: pin = 1, PWM DC = 50.00, PWMPeriod = 50.00, PWM Freq (Hz) = 20000.0000
=====================================================================================
Change PWM Freq to 10000.00
[PWM] setPWM: _dutycycle = 32768 , frequency = 10000.00
[PWM] setPWM_Int: new freq = 10000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 100 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 31 , _actualFrequency = 10080
[PWM] setPWM_Int: TIMERA0, _dutycycle = 32768 , dutycycle = 16
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 16 , actual DC% = 53.13
=====================================================================================
Actual data: pin = 1, PWM DC = 50.00, PWMPeriod = 100.00, PWM Freq (Hz) = 10000.0000
=====================================================================================
Change PWM Freq to 20000.00
[PWM] setPWM: _dutycycle = 32768 , frequency = 20000.00
[PWM] setPWM_Int: new freq = 20000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 50 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 15 , _actualFrequency = 20833
[PWM] setPWM_Int: TIMERA0, _dutycycle = 32768 , dutycycle = 8
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 8 , actual DC% = 56.25
=====================================================================================
Actual data: pin = 1, PWM DC = 50.00, PWMPeriod = 50.00, PWM Freq (Hz) = 20000.0000
=====================================================================================
```

---

### 4. PWM_Waveform on AVR_ATtiny3217

The following is the sample terminal output when running example [**PWM_Waveform**](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_Waveform) on **AVR_ATtiny3217**, to demonstrate how to use the `setPWM_manual()` function in wafeform creation

```cpp
Starting PWM_Waveform on AVR_ATtiny3217
ATtiny_PWM v1.2.0
============================================================================================
Actual data: pin = 1, PWM DutyCycle = 0.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
============================================================================================
[PWM] setPWM_manual: _dutycycle = 0 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 3276 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 6553 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 9830 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 13107 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 16383 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 19660 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 22937 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 26214 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 29490 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 32767 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 36044 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 39321 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 42597 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 45874 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 49151 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 52428 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 55704 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 58981 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 62258 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 65535 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 62258 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 58981 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 55704 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 52428 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 49151 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 45874 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 42597 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 39321 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 36044 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 32767 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 29490 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 26214 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 22937 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 19660 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 16383 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 13107 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 9830 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 6553 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 3276 , frequency = 2000.00
[PWM] setPWM_manual: _dutycycle = 0 , frequency = 2000.00
```

---

### 5. PWM_manual on AVR_ATtiny3217

The following is the sample terminal output when running example [**PWM_manual**](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_manual) on **AVR_ATtiny3217**, to demonstrate how to use the `setPWM_manual()` and `setPWM_DCPercentage_manual()` functions in wafeform creation

```cpp
Starting PWM_manual on AVR_ATtiny3217
ATtiny_PWM v1.2.0
[PWM] ATtiny_PWM: freq = 2000.00 , _dutycycle = 0
[PWM] setPWM: _dutycycle = 0 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 0 , actual DC% = 0.64
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 0.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 0.00 , dc = 0.00
[PWM] setPWM_manual: _dutycycle = 0 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 0 , actual DC% = 0.64
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 0.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 5.00 , dc = 3276.75
[PWM] setPWM_manual: _dutycycle = 3276 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 7 , actual DC% = 5.10
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 5.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 10.00 , dc = 6553.50
[PWM] setPWM_manual: _dutycycle = 6553 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 15 , actual DC% = 10.19
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 10.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 15.00 , dc = 9830.25
[PWM] setPWM_manual: _dutycycle = 9830 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 23 , actual DC% = 15.29
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 15.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 20.00 , dc = 13107.00
[PWM] setPWM_manual: _dutycycle = 13107 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 31 , actual DC% = 20.38
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 20.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 25.00 , dc = 16383.75
[PWM] setPWM_manual: _dutycycle = 16383 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 39 , actual DC% = 25.48
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 25.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 30.00 , dc = 19660.50
[PWM] setPWM_manual: _dutycycle = 19660 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 47 , actual DC% = 30.57
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 30.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 35.00 , dc = 22937.25
[PWM] setPWM_manual: _dutycycle = 22937 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 55 , actual DC% = 35.67
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 35.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 40.00 , dc = 26214.00
[PWM] setPWM_manual: _dutycycle = 26214 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 63 , actual DC% = 40.76
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 40.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 45.00 , dc = 29490.75
[PWM] setPWM_manual: _dutycycle = 29490 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 70 , actual DC% = 45.22
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 45.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 50.00 , dc = 32767.50
[PWM] setPWM_manual: _dutycycle = 32767 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 78 , actual DC% = 50.32
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 50.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 55.00 , dc = 36044.25
[PWM] setPWM_manual: _dutycycle = 36044 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 86 , actual DC% = 55.41
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 55.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 60.00 , dc = 39321.00
[PWM] setPWM_manual: _dutycycle = 39321 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 94 , actual DC% = 60.51
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 60.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 65.00 , dc = 42597.75
[PWM] setPWM_manual: _dutycycle = 42597 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 101 , actual DC% = 64.97
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 65.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 70.00 , dc = 45874.50
[PWM] setPWM_manual: _dutycycle = 45874 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 109 , actual DC% = 70.06
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 70.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 75.00 , dc = 49151.25
[PWM] setPWM_manual: _dutycycle = 49151 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 117 , actual DC% = 75.16
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 75.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 80.00 , dc = 52428.00
[PWM] setPWM_manual: _dutycycle = 52428 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 125 , actual DC% = 80.25
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 80.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 85.00 , dc = 55704.75
[PWM] setPWM_manual: _dutycycle = 55704 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 133 , actual DC% = 85.35
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 85.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 90.00 , dc = 58981.50
[PWM] setPWM_manual: _dutycycle = 58981 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 141 , actual DC% = 90.45
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 90.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 95.00 , dc = 62258.25
[PWM] setPWM_manual: _dutycycle = 62258 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 149 , actual DC% = 95.54
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 95.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
[PWM] setPWM_DCPercentage_manual: DCPercentage = 100.00 , dc = 65535.00
[PWM] setPWM_manual: _dutycycle = 65535 , frequency = 2000.00
[PWM] setPeriod_TimerA0: F_CPU = 20000000 , microseconds = 500 , TCA_Freq_mult = 1.00
[PWM] setPeriod_TimerA0: pwmPeriod = 156 , _actualFrequency = 2003
[PWM] setPWM_Int: TCA0 pin = 1 dutycycle = 157 , actual DC% = 100.64
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 100.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
```

---

### 6. PWM_SpeedTest on AVR_ATtiny3217

The following is the sample terminal output when running example [**PWM_SpeedTest**](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_SpeedTest) on **AVR_ATtiny3217**, to demonstrate how to use new faster `setPWM_DCPercentageInt_manual()` function in wafeform creation, The time is `94197ns` compared to `169577ns` when using `setPWM_DCPercentage_manual()` function of `v1.1.0`. The `setPWM_manual` with `97465ns` is to be used with pre-calculated values in array

##### USING_DC_PERCENT

```
Starting PWM_SpeedTest on AVR_ATtiny3217
ATtiny_PWM v1.2.0
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 0.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
Average time of setPWM function USING_DC_PERCENT
count=10607, ns=94277
count=10616, ns=94197
count=10616, ns=94197
count=10607, ns=94277
count=10616, ns=94197
count=10615, ns=94206
count=10607, ns=94277
count=10616, ns=94197
count=10616, ns=94197
count=10616, ns=94197
count=10607, ns=94277
```

##### not USING_DC_PERCENT

```
Starting PWM_SpeedTest on AVR_ATtiny3217
ATtiny_PWM v1.2.0
=================================================================================================
Actual data: pin = 1, PWM DutyCycle % = 0.00, PWMPeriod = 500.00, PWM Freq (Hz) = 2000.0000
=================================================================================================
Average time of setPWM function not USING_DC_PERCENT
count=10248, ns=97580
count=10261, ns=97456
count=10260, ns=97465
count=10252, ns=97541
count=10260, ns=97465
count=10260, ns=97465
count=10252, ns=97541
count=10260, ns=97465
count=10261, ns=97456
count=10260, ns=97465
count=10252, ns=97541
count=10260, ns=97465

```

---
---

### Debug

Debug is enabled by default on Serial.

You can also change the debugging level `_PWM_LOGLEVEL_` from 0 to 4

```cpp
// Don't define _PWM_LOGLEVEL_ > 0. Only for special ISR debugging only. Can hang the system.
#define _PWM_LOGLEVEL_     0
```

---

### Troubleshooting

If you get compilation errors, more often than not, you may need to install a newer version of the core for Arduino boards.

Sometimes, the library will only work if you update the board core to the latest version because I am using newly added functions.

---
---

### Issues

Submit issues to: [ATtiny_PWM issues](https://github.com/khoih-prog/ATtiny_PWM/issues)

---
---

## TO DO

1. Search for bug and improvement.
2. Support to **TCD0** to change frequency

---

## DONE

1. Basic `TCA0` hardware PWM-channels for Arduino **AVR ATtiny-based boards (ATtiny3217, etc.)** using [**megaTinyCore**](https://github.com/SpenceKonde/megaTinyCore)
 2. Add example [PWM_StepperControl](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_StepperControl) to demo how to control Stepper Motor using PWM
 3. Add example [PWM_manual](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_manual) to demo how to correctly use PWM to generate waveform
 4. Add function `setPWM_DCPercentage_manual()` to facilitate the setting PWM DC manually by using `DCPercentage`, instead of `absolute DCValue` depending on varying PWMPeriod
 5. Catch low frequency error and use lowest permissible frequency
 6. Optimize speed with new `setPWM_DCPercentageInt_manual` function to improve speed almost 50% compared to `setPWM_DCPercentage_manual` of previous `v1.1.0`
 7. Add example [PWM_SpeedTest](https://github.com/khoih-prog/ATtiny_PWM/tree/main/examples/PWM_SpeedTest) to demo the better speed of new `setPWM_DCPercentageInt_manual` function

---
---

### Contributions and Thanks

Many thanks for everyone for bug reporting, new feature suggesting, testing and contributing to the development of this library.

1. Thanks to [Paul van Dinther](https://github.com/dinther) for proposing new way to use PWM to drive Stepper-Motor in [Using PWM to step a stepper driver #16](https://github.com/khoih-prog/RP2040_PWM/issues/16), leading to v1.0.1

<table>
 <tr>
 <td align="center"><a href="https://github.com/dinther"><img src="https://github.com/dinther.png" width="100px;" alt="dinther"/> Paul van Dinther</a> </td>
 </tr>
</table>

---

## Contributing

If you want to contribute to this project:

- Report bugs and errors
- Ask for enhancements
- Create issues and pull requests
- Tell other people about this library

---

### License

- The library is licensed under [MIT](https://github.com/khoih-prog/ATtiny_PWM/blob/main/LICENSE)

---

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