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/DAP/Firmware/Examples/MCU-LINK/DebugConfig/MCU-Link_LPC55S69JBD64_cm33_core0.dbgconf

@@ -0,0 +1,18 @@
+// <<< Use Configuration Wizard in Context Menu >>>
+
+// <o0> SWO pin
+// <i> The SWO (Serial Wire Output) pin optionally provides data from the ITM
+// <i> for an external debug tool to evaluate.
+//      <0=> PIO0_10
+//      <1=> PIO0_8
+SWO_Pin = 0;
+// 
+
+// <h>Debug Configuration
+//   <o.0>    StopAfterBootloader       <i> Stop after Bootloader
+// </h>
+Dbg_CR = 0x00000001;
+//
+
+
+// <<< end of configuration section >>>