##JSON Parser for UART to TFT Display

This project implements a JSON parser that reads in JSON strings over the UART, parses them, and displays the transmitted drawing commands on a TFT display. The project is structured to handle the reception, parsing, and display of JSON protocols using the Erika OS and follows a modular design for clarity and maintainability.

##Table of Contents

Project Overview Features Requirements Installation Usage Contributing

##Project Overview

The main objective of this project is to create a system that can:

Receive JSON data via UART interrupts. Parse the JSON data in a high-priority task. Display drawing commands extracted from the JSON data on a TFT display via a low-priority task. This involves three different contexts:

UART ISR: Receives data and stores it in a ring buffer. High-priority Task (tsk_json): Parses the JSON string and sends commands to the drawing task. Low-priority Task (tsk_hmi): Draws the content on the TFT display.

##Features

Interrupt-Driven UART Reception: Efficiently handles incoming data. Ring Buffer Implementation: Manages data reception and prevents overflow. JSON Parsing: Uses the jsmn library for parsing JSON data. TFT Display Integration: Displays parsed drawing commands on a TFT screen. Thread Safety: Ensures safe access to shared resources using semaphores. Error Handling: Robust error detection and handling during data reception and parsing.

##Requirements

Erika OS: The system is developed based on Erika OS. TFT Display: For visual output. UART Interface: For receiving JSON data. SPI Interface: For communicating with the TFT display. JSMN Library: For JSON parsing.

##Installation

Clone the repository:

bash Copy code git clone https://github.com/your-username/json-uart-tft.git cd json-uart-tft Set up the Erika OS environment and install necessary tools.

Add the jsmn library to your project:

bash Copy code git submodule add https://github.com/zserge/jsmn externals/jsmn Include the TFT library and configure the SPI component as per the project requirements.

##Usage

Compile and Flash the Firmware: Build the project using your development environment and flash it to your hardware.

Run the System: Power up your hardware. The system will:

Receive JSON strings over UART. Parse the JSON data to extract drawing commands. Display the drawings on the TFT screen. Test the System: Use a UART terminal to send JSON strings to the system. Example JSON strings for testing:

json Copy code { "c" : "red", "d" : [10, 10, 10, 100], "d" : [10, 100, 100, 100], "d" : [100, 100, 100, 10], "d" : [100, 10, 10, 10] }

##Contributing

Contributions are welcome! Please follow these steps:

Fork the repository. Create a new branch for your feature or bugfix. Commit your changes. Push the branch to your fork. Open a pull request.