The probe scripts, run.sh, trace_run.sh, webui.py and two emulator tests each named the same hardcoded firmware from a source tree that is not in this repository. They now resolve QEMU and the firmware the way tools/uvk5_testenv.py does -- environment, then PATH, then whatever the checkout has -- and skip with a reason when there is nothing.
webui.py's --qemu and --elf lost their author defaults too: a bare qemu-system-arm through PATH, and no firmware until one is uploaded, which the page already reports.
flash controller: store ACR/OPTKEYR instead of swallowing them, which is what stopped the factory bootloader from starting
slots over the firmware's own serial protocol (0x0720 family); uvk5_socket/uvk5_testenv so a fresh checkout skips instead of failing; web UI slot table and Multiboot button; quick start, CONTRIBUTING, and stop tracking firmware images and radio dumps
The firmware has been printing all along and nothing was listening. USART1 has no
real model here -- it is one of the logging catch-all stubs -- so every byte went
into qemu_log_mask(LOG_UNIMP) and vanished.
Two things were needed, and the second was not in the plan:
1. Print USART1 DR writes (+0x04, per the vendor CMSIS header) as SERIAL lines.
2. Report TXE|TC in USART1 SR. This is the part I had missed. UART_Send() in
App/driver/uart.c spins on LL_USART_IsActiveFlag_TXE() with a bounded timeout
and *skips the byte* when the flag never sets. A stub returning 0 for SR meant
the firmware discarded its own output before it ever reached DR -- the only
write arriving was UART_Init()'s priming zero. So step 1 alone produced
nothing, which is why the first attempt looked like "the build has no logging".
Then a bug of my own: the priming byte is 0x00, I buffered it, and fprintf("%s")
stopped at that NUL and printed an empty line while all 46 bytes sat behind it.
NULs are now dropped, and a line flushes on CR as well as LF.
Verified: SERIAL UV-K5 Firmware, EGZUMER-F4HWN+NR7Y c91cec95
keypad_test.py still passes, which matters because this file is where removing
three fprintfs once silently deleted the keypad.
mckero