Flashing AMDC

During development, JTAG will be the primary interface for programming and debugging the AMDC firmware. Once code is stable, an image can be programed into the AMDC non-volatile memory (NVM). This allows board to boot itself when powered up.

The following steps outline how to create a boot image and flash the AMDC NVM.

Generating boot image file

The PicoZed system-on-module (SoM) on AMDC includes a flash memory device which stores the boot image for start-up. We need to first generate the appropriate image which will be loaded into this memory.

Ensure you have fsbl project in SDK

Xilinx provides a First-Stage Bootloader application project which we will use to create our boot image. If you do not have the fsbl project in SDK:

  1. File > New > Application Project

  2. Name it fsbl

  3. Ensure Board Support Package: is Use existing: amdc_bsp

  4. Click Next >

  5. Select Zynq FSBL template

  6. Click Finish

  7. Your new fsbl project will be imported and build. It should not have issues.

Generate boot image

  1. Right click on the fsbl project directory in SDK

  2. Select Create Boot Image

Dropdown menu from First Stage Bootloader (FSBL) project

  1. Ensure popup menu settings look like the following.

Explaination of settings: .MCS is the file format which is supported for QSPI flashing. The list of three items for “Boot image partitions” must always be the following in this order: fsbl.elf, FPGA bitstream .bit file, your user *.elf file.

Popup menu settings

  1. Click Create Image

  2. If it warns that another file already exists, click OK

  3. It will take a second to create the boot image

Programming the flash memory device

After generating the boot image *.MCSfile, we need to program the flash device for persistent storage.

  1. Ensure you powered up the board in the correct boot mode. This is selected via the switches on the PicoZed PCB. See image below for switch positions for JTAG mode (what you want).

PicoZed switch positions for JTAG mode

  1. Click Xilinx Tools from the main dropdown in the SDK

  2. Click Program Flash

SDK menu button to click

  1. Ensure popup window looks like the following:

Program Flash Memory popup window settings

  1. Click Program

  2. It will start flashing the board. This will take ~3 minutes…

Known Issues

Sometimes, when you try to flash the device (i.e. set 5-6 above), the fsbl main function will appear in SDK because a breakpoint is reached. This occurs because the SDK debugger is still attached to the AMDC. To fix this, disconnect the processor from the SDK Hardware Manager window.

Configure PicoZed to boot from flash

Now the boot image has been loaded onto the PicoZed flash device. We need to configure PicoZed to use it when booting.

  1. Set PicoZed switch positions to the flash boot mode (see image below).

PicoZed switch positions for flash boot mode

Test

AMDC should now be programed and ready to go! Time to test.

  1. Power cycle the board.

  2. Ensure that FPGA DONE yellow LED comes on after ~1 second of powering up

  3. If so, you are good to go!

Notes

NOTE: you will need to put the PicoZed switches back to JTAG mode if you would like to continue development using JTAG.