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# 1.15 QSPI Flash Read Write

This example shows how to use the QSPI Peripheral library to perform erase, write and read operation with the QSPI Serial Flash memory in Quad IO mode.

## Description

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

The application can be configured to perform operations on below QSPI Serial Flash Memories, SST26VF064B (Default) N25Q256.

## 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/qspi/qspi_read_write.

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

Project Name | Description
--- | ---
wbz653_curiosity.X | MPLABX project for WBZ653 Curiosity Board

## Setting Up the Hardware

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

Project Name | Board
--- | ---
wbz653_curiosity.X | WBZ653 Curiosity Board

### Setting Up WBZ653 Curiosity Board

- Make sure the SST26 QSPI flash is connected to the MCU by connecting 0 Ohm resistor on R739, R742, R744, R746, R749 and R752 on the WBZ653 Curiosity Board
- Connect the Debug USB port on the board to the computer using a micro USB cable

## Running the Application

1. Open the application project using its respective IDE
2. Open app.h file and set the macro for the QSPI Flash memory present on the board to 1

       #define APP_USE_SST26_FLASH     1
       #define APP_USE_N25Q_FLASH      0

3. Build and Program the application project
4. LED indicates success or failure:
   - LED is toggled when the value read from the QSPI Serial Flash memory matches with the written value
   - LED is turned ON when the value read from the QSPI Serial Flash did not match with the written value
     Refer below table for LED name:

     Board | LED Name
     --- | ---
     WBZ653 Curiosity Board | Green LED