STM32CubeF1

@verbatim
******************* (C) COPYRIGHT 2016 STMicroelectronics ********************
* @file FSMC/FSMC_NOR/readme.txt
* @author MCD Application Team
* @brief Description of the FSMC NOR example.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
@endverbatim

@par Example Description

How to configure the FSMC controller to access the NOR memory.

The NOR is M29W128GL.

At the beginning of the main program the HAL_Init() function is called to reset
all the peripherals, initialize the Flash interface and the systick.
Then the SystemClock_Config() function is used to configure the system
clock (SYSCLK) to run at 72 MHz.

The goal of this example is to explain the different steps to configure the FSMC
and make the NOR device ready for access, without using the BSP layer.

In this example, the NOR device is configured and initialized explicitly
following all initialization sequence steps. After initializing the device, user
can perform erase/read NOR ID/read data/write data operations on it.
A data buffer is written to the NOR memory, then read back and checked to verify
its correctness.

If the data is read correctly from NOR, the LED1 is ON, otherwise the LED2 is ON.
In case of HAL initialization issue, LED3 will be ON.

@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.

@note The application need to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.

@par Directory contents

- FSMC/FSMC_NOR/Inc/stm32f1xx_hal_conf.h HAL Configuration file
- FSMC/FSMC_NOR/Inc/main.h Header for main.c module
- FSMC/FSMC_NOR/Inc/stm32f1xx_it.h Header for stm32f1xx_it.c
- FSMC/FSMC_NOR/Src/main.c Main program
- FSMC/FSMC_NOR/Src/stm32f1xx_hal_msp.c HAL MSP module
- FSMC/FSMC_NOR/Src/stm32f1xx_it.c Interrupt handlers
- FSMC/FSMC_NOR/Src/system_stm32f1xx.c STM32F1xx system clock configuration file

@par Hardware and Software environment

- This example runs on STM32F1xx devices.

- This example has been tested with STM3210E-EVAL RevD board and can be
easily tailored to any other supported device and development board.

@par How to use it ?

In order to make the program work, you must do the following :
- Open your preferred toolchain
- Rebuild all files and load your image into target memory
- Run the example