# pic18f47q10-cnano-pwm-rgb-led-bare

**Repository Path**: microchip-pic-avr-examples/pic18f47q10-cnano-pwm-rgb-led-bare

## Basic Information

- **Project Name**: pic18f47q10-cnano-pwm-rgb-led-bare
- **Description**: PIC18F47Q10 PWM RGB-LED Using Interrupts - bare metal code example
- **Primary Language**: C
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-06-17
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

<div id="readme" class="Box-body readme blob js-code-block-container">
 <article class="markdown-body entry-content p-3 p-md-6" itemprop="This needs to locked down and 'never' changed"><p><a href="https://www.microchip.com" rel="nofollow"><img src="images/Microchip.png" alt="MCHP" width="300";"></a></p>


# PIC18F47Q10 PWM RGB-LED Using Interrupts

## Objective:
This repository contains an example of bare-metal code for PWM as described in [*TBxxxx - Getting Started with PWM on PIC18*](https://www.microchip.com/) document from Microchip.
<br>The PIC18F47Q10 features four 10-bit PWM generators. In this demo, the CCP1, CCP2 and PWM3 peripherals in conjunction with TMR2 are used to produce PWM signals featuring a color game on an RGB LED.
Three GPIO pins are used as outputs: RB0, RB3 and RD0.

## Related Documentation
- [TBxxxx - Getting Started with PWM on PIC18](http://www.microchip.com/)
- [PIC18-Q10 Product Family Page](https://www.microchip.com/design-centers/8-bit/pic-mcus/device-selection/pic18f-q10-product-family)
- [PIC18F47Q10 Data Sheet](http://ww1.microchip.com/downloads/en/DeviceDoc/40002043D.pdf)
- [PIC18F47Q10 Code Examples on GitHub](https://github.com/microchip-pic-avr-examples?q=pic18f47q10-cnano)

## Software Used
- MPLAB® X IDE 5.30 or newer [(microchip.com/mplab/mplab-x-ide)](http://www.microchip.com/mplab/mplab-x-ide)
- MPLAB® XC8 2.10 or newer [(microchip.com/mplab/compilers)](http://www.microchip.com/mplab/compilers)
- Microchip PIC18F-Q Series Device Support 1.3.89 or newer [(packs.download.microchip.com/)](https://packs.download.microchip.com/)

## Hardware Used
- PIC18F47Q10 Curiosity Nano [(DM182029)](https://www.microchip.com/Developmenttools/ProductDetails/DM182029)
- one RGB LED either common anode (default) or common cathode, resistors, wires and optionally a breadboard

## Setup
The PIC18F47Q10 Curiosity Nano Development Board is used as the test platform.

<br><img src="images/PIC18F47Q10_CNANO.png" width="600">

The following configuration is done for this example:
- RB0 pin - Configured as digital PWM output (PWM1)
- RB3 pin - Configured as digital PWM output (PWM2)
- RD0 pin - Configured as digital PWM output (PWM3)


## Operation

<img src="images/rgb-led.png" alt="Hardware Setup"/>

Assemble the circuit, then  build and run the code.
The PWM frequency is fixed 7.8kHz on all three outputs while the PWM's duty-cycles are varied from minimum to the maximum during interrupt routine, like in the presented picture:

<img src="images/rgb-timing.png" alt="Timing diagram"/>

## Summary
This project showcases how to configure the PIC18F47Q10 microcontroller for generating three PWM signals and duty-cycle update during interrupt.