Zephyr demo driver for Macromix Nor Flash mx25r6435f and stm32l4xx, stm32l4s5vitx

Overview

This module is a working in progress for a driver of Macromix mx25r6435f present in the board STM32L4+ Discovery kit IoT B-L4S5I-IOT01A

State

Wrapps STM Cube API in a custom Zephyr driver

Next Steps

Implement this driver using flashspi API.

Usage

#include <zephyr.h>
#include "octospi_flash_driver.h"

const struct device *octospi_dev;

char DATA_WRITE[] = "Hello Octo-SPI from Zephyr...";

#define BUFFER_SIZE sizeof(DATA_WRITE)
char BUFFER[ BUFFER_SIZE ];


static void test_flash(void *p1, void *p2, void *p3)
{
        octospi_dev = device_get_binding("OCTOSPI_FLASH_DRIVER");

        // Erase the sector
        printk("Erase sector...\n" );
        octospi_flash_erase_sector(octospi_dev, 0 );

        //TODO: Driver not waiting for operation complete
        k_msleep(60);

        // Read to check if is empty
        octospi_flash_read(octospi_dev, 0, BUFFER, BUFFER_SIZE );
        for( int i=0; i < BUFFER_SIZE; ++i ) {
                if( BUFFER[i] != 0xFF ) {
                        printk("Error, data not erased!\n");
                }
        }

        // Write data
        octospi_flash_write(octospi_dev, 0, DATA_WRITE, BUFFER_SIZE );

        // Read to check if data was writen.
        octospi_flash_read(octospi_dev, 0, BUFFER, BUFFER_SIZE );
        BUFFER[ BUFFER_SIZE ] = 0;

        for( int i=0; i < BUFFER_SIZE; ++i ) {
                if( BUFFER[i] != DATA_WRITE[i] ) {
                        printk("Error, data written doesn't match!\n");
                        return;
                }
        }

        printk("Test succeed!\n");

}

Requirements

A Zephyr development environment configured, see: <https://docs.zephyrproject.org/latest/getting_started/index.html>

A board STM32L4+ Discovery kit IoT B-L4S5I-IOT01A.

Building and Running

Build and flash Zephyr Image:

.. zephyr-app-commands::
   :zephyr-app: szephyr-demo-mx25r6435f
   :board: b_l4s5i_iot01a
   :goals: build flash
   :compact:

After flashing, you should be able to access the console and view the test results.

License

This repository is open-sourced under the Apache-2.0 license. For a list of other open-source components included in this repository, see the file 3rd-party-licenses.txt.