UA1ZBE Custom Firmware v1.0

Features:
- VFO mode with direct frequency input
- POCSAG decoder (512/1200 baud) with BCH(31,21) correction
- Full-screen Spectrum analyzer
- FM Radio receiver
- RSSI signal indicator overlay
- Custom boot splash (UA1ZBE / POCSAG pager / build date)

Architecture:
- app/mode.c — mode dispatcher (VFO/POCSAG/Spectrum/FM)
- app/boot_splash.c — 2-second boot splash
- app/pocsag/ — POCSAG decoder + BCH correction
- app/display_rssi.c — RSSI indicator
- main.c — entry point with custom init
- syscalls.c — bare-metal _sbrk stub

Build: arm-none-eabi-gcc -Os -flto -Wall -Werror -Wextra
Size: 57.9KB Flash / 3.6KB RAM

Controls:
- 0-9: Direct frequency input (VFO)
- SK2: POCSAG mode
- SK1: Spectrum analyzer
- 0: FM Radio
- EXIT: Return to VFO
- F/*: Toggle 512/1200 baud (in POCSAG)

external/CMSIS_5/CMSIS/RTOS2/RTX/Examples/Migration/Abstract.txt

@@ -0,0 +1,30 @@
+The RTX_Blinky project is a simple RTX Kernel based example
+for a simulated Cortex-M3 device
+
+Example functionality:
+ - Clock Settings:
+   - XTAL    =  50 MHz
+   - Core    =  25 MHz
+
+The simple RTX Kernel based example simulates the step-motor 
+driver. Four LEDs are blinking simulating the activation of 
+the four output driver stages
+The simulation does not provide LEDs, so the state changes
+are output on the Debug printf window:
+
+- phase A
+- phase B
+- phase C
+- phase D
+
+This example simulates Half step driver mode and
+CW rotation direction.
+
+
+The BLINKY example program is available for one target:
+
+  Simulation:          configured for a simulated on-chip Flash
+
+The example is compatible with other Cortex-M class devices.
+Simply open the project settings, navigate to Device tab and
+select another Cortex-M class device.