chore: add configurable refresh rate

[kienvo]

Fixes #100

Summary by Sourcery

Make the LED refresh rate compile-time configurable by introducing a new Makefile variable and updating timer initialization to use it

Enhancements:

• Allow custom LED refresh rate via a new LED_REFRESH_RATE variable (default 2000 Hz)
• Update TMR0_TimerInit in main.c to derive its interval from LED_REFRESH_RATE instead of a hardcoded value

Build:

• Define LED_REFRESH_RATE in the Makefile and propagate it to CFLAGS

[sourcery-ai]

Reviewer's Guide

Externalizes LED refresh rate into a configurable Makefile variable (LED_REFRESH_RATE) and updates code to use this macro instead of a hardcoded value.

Class diagram for configurable LED refresh rate

classDiagram
    class main {
        +int main()
    }
    main : +TMR0_TimerInit((FREQ_SYS / LED_REFRESH_RATE) / 2)
    main : +uses LED_REFRESH_RATE macro

Loading

File-Level Changes

Change	Details	Files
Introduce and propagate LED_REFRESH_RATE build variable	Add LED_REFRESH_RATE definition with default value Include LED_REFRESH_RATE in CFLAGS via -DLED_REFRESH_RATE	Makefile
Use LED_REFRESH_RATE macro in timer initialization	Replace hardcoded 2000 Hz value with LED_REFRESH_RATE in TMR0_TimerInit call	src/main.c

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#100	Increase the LED refresh rate to reduce or eliminate visible flickering at maximum brightness.	✅
#100	Make the LED refresh rate configurable to allow tuning for maximum technical capability of the board.	✅

---

Tips and commands

Interacting with Sourcery

• Trigger a new review: Comment @sourcery-ai review on the pull request.
• Continue discussions: Reply directly to Sourcery's review comments.
• Generate a GitHub issue from a review comment: Ask Sourcery to create an
  issue from a review comment by replying to it. You can also reply to a
  review comment with @sourcery-ai issue to create an issue from it.
• Generate a pull request title: Write @sourcery-ai anywhere in the pull
  request title to generate a title at any time. You can also comment
  @sourcery-ai title on the pull request to (re-)generate the title at any time.
• Generate a pull request summary: Write @sourcery-ai summary anywhere in
  the pull request body to generate a PR summary at any time exactly where you
  want it. You can also comment @sourcery-ai summary on the pull request to
  (re-)generate the summary at any time.
• Generate reviewer's guide: Comment @sourcery-ai guide on the pull
  request to (re-)generate the reviewer's guide at any time.
• Resolve all Sourcery comments: Comment @sourcery-ai resolve on the
  pull request to resolve all Sourcery comments. Useful if you've already
  addressed all the comments and don't want to see them anymore.
• Dismiss all Sourcery reviews: Comment @sourcery-ai dismiss on the pull
  request to dismiss all existing Sourcery reviews. Especially useful if you
  want to start fresh with a new review - don't forget to comment
  @sourcery-ai review to trigger a new review!

Customizing Your Experience

Access your dashboard to:

• Enable or disable review features such as the Sourcery-generated pull request
  summary, the reviewer's guide, and others.
• Change the review language.
• Add, remove or edit custom review instructions.
• Adjust other review settings.

Getting Help

• Contact our support team for questions or feedback.
• Visit our documentation for detailed guides and information.
• Keep in touch with the Sourcery team by following us on X/Twitter, LinkedIn or GitHub.

[sourcery-ai]

Hey @kienvo - I've reviewed your changes and they look great!

---

Sourcery is free for open source - if you like our reviews please consider sharing them ✨

• X
• Mastodon
• LinkedIn
• Facebook

_{Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.}

[froscon2024]

Are there some tests done to know what is the highest possible refresh rate?