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====== Bootloader ======
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===== Bootloader for a firmware update from an SD card =====
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<tab>If you want to make your own Unicard, you must load bootloader into the Unicard for a firmware update from an SD card. The DFU file (a binary file for loading the bootloader for a firmware update from an SD card) is available along with the source codes of the firmware Unicard on sourceforge:

[[https://sourceforge.net/projects/unicardmk3/files/DFU/Bootloader/|DFU binary file of the bootloader.]]\\
[[https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/stsw-stm32080.html|DFU downloader for OS Windows.]]
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===== Loading the DFU file =====
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  * needed software:
      * Windows XP or newer
      * the .dfu file
      * DFU downloader for OS Windows

  * needed hardware:
    * an assembled Unicard
    * a connecting cable USB-A/miniB
    * a PC with Windows and USB
    * 1 jumper

  * description of loading the bootloader into a Unicard:
      * install DFU downloader for Windows
      * on the card itself, connect the pins labeled "BOOT" with the jumper
      * connect the card to PC using a USB-A/miniB cable
      * Windows will offer a driver installation, let it install automatically. If the drivers do not install automatically, install them manually from the DFU downloader folder.
      * After the driver is installed, disconnect and reconnect the card to the USB
      * From the program selection, run program ... Program Files / STMicroelectronics / DfuSe / DfuSeDemo
      * After running the program, all you care about is the frame in the bottom right called "Upgrade or Verify Action"
      * Tick "Verify after download"
      * Click on the icon at the bottom called "Choose..."
      * Select the file with the bootloader (UNICARDmk3_IAP.dfu) and select open
      * Back in the program click on "Upgrade" at the bottom
      * If a message shows up with the message "Verify successful!" you are done
      * Disconnect the USB cable, remove the BOOT connection and you can put your card into a Sharp
      * After loading the bootloader you also have to load firmware into the Unicard

<WRAP download round>\\ {{ :unicard:firmware:unicardmk3_iap.zip |Dfu bootloader}}</WRAP>
<WRAP download round>\\ {{ :unicard:firmware:en.stsw-stm32080.zip |DfuSe Demo 3.0.6}}</WRAP>
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===== Guide with pictures for DfuSeDemo version 3.0.6 =====
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<WRAP tabs>
  * [{{unicard:firmware:unicardfw_dfu0.jpg|//Connect the JUMPER labelled BOOT.//}}]
  * [{{unicard:firmware:unicardfw_dfu1.jpg|//After installing the drivers "STM Device in DFU Mode" will appear in the device manager.//}}]
</WRAP>
<WRAP tabs>
  * [{{unicard:firmware:unicardfw_dfu2.jpg|//In "Available DFU Devices" we pick "STM Device in DFU Mode" and tick "Verify after download".//}}]
  * [{{unicard:firmware:unicardfw_dfu3.jpg|//Using the button "Choose" (1.) we load a DFU file. "File correctly loaded." should appear in the information panel (2.).//}}]
</WRAP>
<WRAP tabs>
  * [{{unicard:firmware:unicardfw_dfu4.jpg|//After selecting buttons "Upgrade" and then "Yes" on the confirmation dialogue, the DFU file will run.//}}]
  * [{{unicard:firmware:unicardfw_dfu5.jpg|//On the information panel you should be able to see the individual phases of the DFU file loading - "Erase Phase".//}}]
</WRAP>
<WRAP tabs>
  * [{{unicard:firmware:unicardfw_dfu6.jpg|//On the information panel you should be able to see the individual phases of the DFU file loading - "Download Phase".//}}]
  * [{{unicard:firmware:unicardfw_dfu7.jpg|//After successfully loading the DFU file "Verify successful!" message should appear in the information panel.//}}]
</WRAP>
<WRAP round alert>
=== Warning ===
//When updating firmware //** MZ_ID **//firmware is not checked (to still allow the option of changing the Unicard firmware from one type of computer to another). Incorrectly matching firmware with a computer, on which the Unicard update is being done can damage your device.//
</WRAP>
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  *[[http://nobomi.cz/8bit|Information source - webpage of the author NOBOMI]]
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