Serial Configuration for firmware + UEFI debug info?
ballanty opened this issue · 1 comments
I'm attempting a supported configuration: UEFI + FreeBSD. I'm starting with just a single boot (FAT32) partition with the release 0.3 version of UEFI and no other partitions on the SD card.
When I connect HDMI monitor and USB keyboard I can see the video cycle (backlight on/off but no actual output of any kind).
I've attached a usb serial adapter to GPIO 14/15 (I don't have the funny special RPI5 cable for the dedicated serial). I've modified config.txt to contain:
dtparam=uart0
dtparam=uart0_console
(based on instruction to get GPIO14/15 to be the console).
I've done this to see debug info and perhaps figure out what's going on but I get no serial output.
I've confirmed the serial cable operational by booting a Debian SD card in the same RPI5 (with the same config options).
Q1: What settings should be set in config.txt to get serial output from firmware/UEFI?
Q2: I've assumed that UEFI doesn't require a second partition with an OS on it to function properly. Is this true?
Hi, trying to attempt the same to get UEFI on serial via GPIO pins. Have you figured it out?