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# 1.20 SQI Flash Read Write

This example application demonstrates how to use the SQI Peripheral library to perform erase, write and read operation with the SQI Serial Flash memory.

## Description

This example uses the SQI peripheral library to erase and write an array of values to the SQI Serial Flash memory. It verifies the value written by reading the values back and comparing it to the value written.

## Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/sqi/sqi_read_write/firmware.

To build the application, refer to the following table and open the project using its IDE.

Project Name | Description
--- | ---
pic32mz_daa_sk.X | MPLABX project for PIC32MZ Embedded Graphics with External DRAM (DA) Starter Kit
pic32mz_dag_sk.X | MPLABX project for PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit
pic32mz_das_sk.X | MPLABX project for PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit (Crypto)

## Setting Up the Hardware

The following table shows the target hardware for the application projects.

Project Name | Description
--- | ---
pic32mz_daa_sk.X | PIC32MZ Embedded Graphics with External DRAM (DA) Starter Kit
pic32mz_dag_sk.X | PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit
pic32mz_das_sk.X | PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit (Crypto)

### Setting Up PIC32MZ Embedded Graphics with External DRAM (DA) Starter Kit

- Connect the Debug USB port on the board to the computer using a micro USB cable

### Setting Up PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit

- Connect the Debug USB port on the board to the computer using a micro USB cable

### Setting Up PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit (Crypto)

- Connect the Debug USB port on the board to the computer using a micro USB cable

## Running the Application

1. Build and program the application using the its IDE
2. Switch LED is turned ON to indicate waiting for switch press
3. Press the Switch to start the SQI Transfer. Switch LED is turned OFF once switch is pressed
4. The Success LED is turned ON when the value read from the SQI Serial Flash memory matched with the written value

Following table provides the Switch and LED names:

Board | Switch Name | Success LED Name | Switch LED Name
--- | --- | --- | ---
PIC32MZ Embedded Graphics with External DRAM (DA) Starter Kit | SW3 | LED3 | LED1
PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit | SW3 | LED3 | LED1
PIC32MZ Embedded Graphics with Stacked DRAM (DA) Starter Kit (Crypto) | SW3 | LED3 | LED1