Error: Flash download failed – Cortex-M4

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Here we go to solve this problem with Flash Downloading.

First download STM32 ST-Link Utility. From the link below, from Get Software you should give your full name and email information. Then you will get a mail that contains a download link.

http://www2.st.com/content/st_com/en/products/embedded-software/development-tool-software/stsw-link004.html#

After installing the software plug your board with USB cable to your PC. Open the STM32 ST-Link Utility.

1

From the Target tab go to Option Bytes…

Select Level 0 for Read Out Protection and Level 3 for BOR Level

And in Flash sectors protection unselect all the sectors.

2

Then click on Apple button.

Now you can flash your board without any problem with Keil.

Don’t hesitate to ask your questions if you have some problems.

Masoud

STM32F4 Discovery with Keil uVision5 Guide For Beginners

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Today I’m gonna show you how to start and create a new project with Keil uVision5 for STM32F4 Discovery.

You just need followings to start:

  • STM32F4 Discovery Board
  • USB Mini Cable
  • Board Kit Driver Software  Download
  • Keil uVision5 Software (From the link below, go to the Download -> Product Downloads -> MDK-ARM). After you enter your contact information there you can download the program.

https://www.keil.com/

  • STM32 ST-Link Utility (Just in case you got problems with your board). From the link below, from Get Software you should give your full name and email information. Then you will get a mail that contains a download link.

http://www2.st.com/content/st_com/en/products/embedded-software/development-tool-software/stsw-link004.html#

Here is our STM32F4 Discovery Board and USB Mini Cable:

card1usb mini

Before you install your driver 1 LED (PWR LED) will turn on red stable and another LED (COM LED) will blink red.

After you install st-link_v2_usbdriver, update your driver.

Device Manager -> Other devices -> STM32 STLink

Right click and Update Driver Software… and choose Search automatically for updated driver software

After updating, driver will be shown in Universal Serial Bus controllers or Universal Serial Bus devices as a STMicroelectronics STLink dongle

Now the COM LED won’t be blink and will be stable red as PWR LED.

For next, install Keil uVision5 which you downloaded before. Now you probably need a device pack. Get the latest version from link below (for now Keil.STM32F4xx_DFP.2.8.0.pack).

Keil -> STMicroelectronics STM32F4 Series Device Support, Drivers and Examples -> Download

http://www.keil.com/dd2/pack/#/eula-container

After downloading, open Keil uVision5 and install your pack as shown below:

Click on Pack Installer.

pack 1

Refresh your Packs (File -> Refresh) (To Refresh you must be online). Then Import the pack you downloaded already (File -> Import…).  After you imported the pack you can see your pack as a STM32F407VGTx.

pack 2

You can start with an example (Blink) project to test your board.

There are some example projects in the pack you downloaded before. From Root address of your Keil uVision5 program choose the GPIO example. But first disable the Read-only protection of the Projects Folder.

Keil_v5 -> ARM -> Pack -> Keil -> STM32F4xx_DFP -> [Pack Version (for example 2.8.0) ] -> Right click on Projects Folder and go to Properties uncheck Read-only and confirm the changes to the subfolders and files.

Now in Keil uVision5 open your example project. Project -> Open Project…

Keil_v5 -> ARM -> Pack -> Keil -> STM32F4xx_DFP -> [Pack Version (for example 2.8.0) ] -> Projects -> STM32F4-Discovery -> Examples -> GPIO -> GPIO_EXTI -> MDK-ARM -> Project (Green Icon File)

Now set-up the configure for your board. Click on Options for Target…

option1

From Target tab set Xtal (MHz) up to 8.0

In Debug tab use ST-Link Debugger

debug1

In Utilities tab uncheck Use Debug Driver and choose ST-Link Debugger

utulities1

In Configure Flash Menu Command open settings and make sure that in Flash Download tab for Programming Algorithm you’ve added STM32F4xx Flash.

settings1

and in Debug tab for Debug Adapter unit ST-Link/V2 is already chosen (whn your board is connected to your PC) and the Port is SW.

settings2

Now open main.c from Example/User Folder in the Project toolbar in the left side.Build you project by pressing F7 or the icon. And Load it to your board by pressing F8 or the icon.

main1

while you are loading your project the LD1 LED on your board will blink red and green repeatedly. It shows that the project is loading to your board.

card2

If all the processes gone correctly you will see the these messages in Build Output window in the bottom.

build1

By pressing the Blue Button on your board you can see the 4 LEDs (between the Black Button and Blue Button)turning on and off.

I recommend that to read the User Manual to know better of your board.

Discovery kit with STM32F407VG MCU User Manual Download

For more information and details you can check this PDF. Download

Don’t hesitate to ask your questions if you have some problems.

Masoud