Recover your device | ConnectCore MP25

Perform a rescue boot

If the bootloader has been erased from the storage media (or written with an invalid image) and the target does not boot, you can boot the target from a different media.

Boot in USB debug mode

Boot in USB debug mode

Requirements

Linux host computer
Root/administrator permissions on your development computer

For the ConnectCore MP25 Development Kit:

One USB type-C cable
One USB serial console cable

Instructions

Download the TF-A binary image file suitable to boot from USB (tf-a-ccmp25-dvk-usb.stm32) from https://ftp1.digi.com/support/digiembeddedyocto/4.0/r7/images/ccmp25-dvk/wayland/arm-trusted-firmware/.
Download the FIP DDR firmware binary image file (fip-ccmp25-dvk-ddr.bin) from https://ftp1.digi.com/support/digiembeddedyocto/4.0/r7/images/ccmp25-dvk/wayland/fip/.
Download the FIP binary image file (fip-ccmp25-dvk-optee.bin) from https://ftp1.digi.com/support/digiembeddedyocto/4.0/r7/images/ccmp25-dvk/wayland/fip/.
Install the dfu-util software tool on your development PC:
```
$ sudo apt-get install dfu-util
```
Connect the USB serial cable to the CONSOLE connector on the board and to your host computer.
Connect a USB type-C cable to your development PC and the other end to the target USB type-C connector.
Change the boot mode configuration to boot from USB. To do so, set the boot mode micro-switches as follows:
- BOOT.1: OFF
- BOOT.2: ON
- BOOT.3: OFF
- BOOT.4: OFF
Open a serial terminal at 115200/8/n/1.
Power up the board.
On the host computer, run the dfu-util tool with the TF-A and FIP files as follows:
```
$ dfu-util -a 0 -D tf-a-ccmp25-dvk-usb.stm32
$ dfu-util -a 0 -e
$ sleep 1
$ dfu-util -a 0 -D fip-ccmp25-dvk-ddr.bin
$ dfu-util -a 0 -e
$ sleep 1
$ dfu-util -a 1 -D fip-ccmp25-dvk-optee.bin
$ dfu-util -a 0 -e
```
The serial terminal shows the device starting U-Boot. You can proceed to re-program U-Boot into the eMMC. See Reprogram bootloader in the eMMC.

Reprogram bootloader in the eMMC

Once U-Boot is running, you can use it to update the TF-A and FIP images in the eMMC:

Download the TF-A binary image file suitable to boot from eMMC (tf-a-ccmp25-dvk-emmc.stm32) from https://ftp1.digi.com/support/digiembeddedyocto/4.0/r7/images/ccmp25-dvk/wayland/arm-trusted-firmware/.
Download the FIP binary image file suitable to boot from eMMC (fip-ccmp25-dvk-optee.bin) from https://ftp1.digi.com/support/digiembeddedyocto/4.0/r7/images/ccmp25-dvk/wayland/fip/.
Download the Metadata binary image file (metadata.bin) from https://ftp1.digi.com/support/digiembeddedyocto/4.0/r7/images/ccmp25-dvk/wayland/arm-trusted-firmware/.
Reset the environment to default values:
```
=> env default -a
```
Reset to the default partition table into the eMMC:
```
=> run partition_emmc_linux
```
Save the environment with saveenv.
Use one of the following methods to update the files to the eMMC:

Re-program bootloader from Ethernet (TFTP)

Place the TF-A and FIP binaries inside your host computer TFTP exported folder.
On the target, configure your network settings (IP of the device, IP of the host/server):
```
=> setenv ipaddr <your-ip>
=> setenv serverip <server-ip>
```
Connect an Ethernet cable to the Ethernet port.

Run the following commands to update TF-A and FIP images into the eMMC:

=> update boot1 tftp tf-a-ccmp25-dvk-emmc.stm32
=> update boot2 tftp tf-a-ccmp25-dvk-emmc.stm32
=> update metadata1 tftp metadata.bin
=> update metadata2 tftp metadata.bin
=> update fip-a tftp fip-ccmp25-dvk-optee.bin
=> update fip-b tftp fip-ccmp25-dvk-optee.bin

Change the boot mode configuration to boot from the internal eMMC.

To do so, set the boot mode micro-switches as follows:
- BOOT.1: OFF
- BOOT.2: OFF
- BOOT.3: OFF
- BOOT.4: OFF
Power-cycle the board. The target now boots from the eMMC.

Re-program bootloader from microSD card

Place the TF-A and FIP binaries inside a FAT-formatted microSD card.
Insert the microSD card in the board.

Run the following commands to update TF-A and FIP images into the eMMC:

=> update boot1 mmc 1 tf-a-ccmp25-dvk-emmc.stm32
=> update boot2 mmc 1 tf-a-ccmp25-dvk-emmc.stm32
=> update metadata1 mmc 1 metadata.bin
=> update metadata2 mmc 1 metadata.bin
=> update fip-a mmc 1 fip-ccmp25-dvk-optee.bin
=> update fip-b mmc 1 fip-ccmp25-dvk-optee.bin

Change the boot mode configuration to boot from the internal eMMC.

To do so, set the boot mode micro-switches as follows:
- BOOT.1: OFF
- BOOT.2: OFF
- BOOT.3: OFF
- BOOT.4: OFF
Power-cycle the board. The target now boots from the eMMC.

Re-program bootloader from a USB mass storage

Place the TF-A and FIP binaries inside a FAT-formatted USB mass storage.
Insert the USB storage in the board.
Start the USB:
```
=> usb start
```

Run the following commands to update TF-A and FIP images into the eMMC:

=> update boot1 usb 0 tf-a-ccmp25-dvk-emmc.stm32
=> update boot2 usb 0 tf-a-ccmp25-dvk-emmc.stm32
=> update metadata1 usb 0 metadata.bin
=> update metadata2 usb 0 metadata.bin
=> update fip-a usb 0 fip-ccmp25-dvk-optee.bin
=> update fip-b usb 0 fip-ccmp25-dvk-optee.bin

Change the boot mode configuration to boot from the internal eMMC.

To do so, set the boot mode micro-switches as follows:
- BOOT.1: OFF
- BOOT.2: OFF
- BOOT.3: OFF
- BOOT.4: OFF
Power-cycle the board. The target now boots from the eMMC.