Can't flash eMMC of CM4 using another Pi 4

[ll-O-ll]

So I've been trying to flash the eMMC of my CM 4 using another Raspberry Pi 4. I've used the steps outlined at https://www.raspberrypi.com/documentation/computers/compute-module.html#steps-to-flash-the-emmc

Here's what I did:

Connect jumper cable on J2 to disable eMMC boot on the CM 4. Connect J11 USB slave to Pi 4 Power Pi 4 Power CM 4

Here's a picture of my setup:

I expect the CM 4 to appear as a device on the Pi 4 but I see nothing :(

Any steps I'm missing here??

[lurch]

Have you built and run rpiboot ? https://www.raspberrypi.com/documentation/computers/compute-module.html#building-rpiboot-on-your-host-system

[ll-O-ll]

Yes I did this... Rpiboot stuck on Waiting for BCM2835/6/7/2711

[dp111]

Have you tried a different USB cable?

On Thu, 16 May 2024, 19:53 Ahmed Nissal, @.***> wrote:

Yes I did this... Rpiboot stuck on Waiting for BCM2835/6/7/2711

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[ll-O-ll]

Tried a different cable it works now. New problem though. It freezes my Pi 4 machine and all peripherals don't work (mouse keyboard). I rebooted both pis and the same thing happened. Here's a snapshot of where i'm at:

The CM4's green light turns on as well... seems to me it exits boot mode

[ll-O-ll]

So I tried the secure boot method... it got me further but I still can't see the disk mount when I run sudo lsblk