Rework the header RSSI bar (uiUtilityDrawRSSIBarGraph) from a solid two-stage
bar into discrete blocks, one per S-level, on colour displays:
- 9 green blocks for S1..S9 (4 dB per S-unit) plus 6 red blocks for the S9+
region (10 dB per block, S9+10..S9+60), drawn with 2 px gaps so the header
background shows between them.
- Proportional fill: full blocks below the level, leading block partially filled
to reflect the exact signal.
- Bar height raised 4 -> 6 px; the FM/DMR mic-level bars follow the same height
so nothing is left behind when switching RX <-> TX.
- Scale labels below the blocks: S1/S3/S5/S7/S9 under the green zone and
+20/+40/+60 under the red, centred under their blocks (font_6x8). The label
row is blanked while transmitting.
Monochrome displays keep the original solid bar. Existing analog S9+ RSSI
compression is preserved, so calibration is unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The radio hard-froze (needs battery pull) the instant it processed an incoming
DMR frame — repeater reply, or noise on a DMR channel. FM and DMR TX-without-a-
listening-repeater were fine. Cause: codec_interface.c invoked the AMBE codec
through hand-written inline assembler with no operands and no clobber list,
branching (BL) to an absolute address. That code's correctness depends entirely
on a specific compiler's register allocation; modern GNU toolchains (both ARM
GCC 10 and 14) miscompile it, corrupting state on the first codec call.
Port the official R20260504 (git ebd7100) rework: replace all five inline-asm
calls (2x decode, 2x encode, 1x ECC) with C function-pointer calls. Each call
reproduces the exact register/stack layout the assembler set up (AAPCS: args
1-4 -> r0-r3, args 5+ -> stack) and sets the Thumb bit on the target address.
Also drop the trailing semicolons from the AMBE_* address macros in codec.h so
they can be used in C expressions.
Builds cleanly with the GCC 14.2 Docker toolchain (no STM32CubeIDE needed) and
DMR RX/TX now works on the radio.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
