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 S-meter had a number to draw, but a fixed RSSI above squelch meant the band was
uniformly and permanently occupied. Scanning, squelch, and every "is this channel busy"
decision therefore faced a situation that never varied, so none of that logic was
really being tested -- the tests passed without testing much.
RSSI is now derived from where the firmware tuned. BK4819_SetFrequency splits the
frequency across REG_38 and REG_39 (driver/bk4819.c:743), which the model already
records; verified against a live guest that 0x0262/0x5A00 reads back as 400.00000 MHz,
matching the screen. A small table of virtual stations plus a noise floor and a fade
either side of centre gives a band with signals in some places and not others.
Measured through the firmware's own tuning path -- typing 410.000 on the keypad rather
than poking the registers, so the test does not check the model against itself:
400.000 MHz (station) RSSI 0x01E5
410.000 MHz (empty) RSSI 0x0091 a gap of 85 dB
What is honest and what is not, recorded in the code: the shape is real physics, power
falls off away from a carrier with a noise floor underneath. The station list is
invented. So this reproduces "the firmware copes with a band that is busy in places",
which is genuine coverage, and it reproduces no actual radio environment -- a dBm figure
from here is not a claim about the world.
Also records why backlight PWM is deliberately left stubbed. Intermediate brightness
runs TIM7 -> DMA rewriting GPIOA BSRR at 128 kHz, so modelling it costs 128,000 GPIO
writes per emulated second and changes nothing observable: backlight is LED brightness
and never touches the framebuffer. The two endpoints that are observable, off and full,
bypass the timer and already work.
Full run: 16 passed, 0 failed.
mckero