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/LPC-Link2/main.c

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2013-2021 ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ----------------------------------------------------------------------
+ *
+ * $Date:        21. May 2021
+ * $Revision:    V2.0.0
+ *
+ * Project:      CMSIS-DAP Examples LPC-Link2
+ * Title:        main.c CMSIS-DAP Main module for LPC-Link2
+ *
+ *---------------------------------------------------------------------------*/
+
+#include "cmsis_os2.h"
+#include "osObjects.h"
+#include "rl_usb.h"
+#include "DAP_config.h"
+#include "DAP.h"
+
+// Application Main program
+__NO_RETURN void app_main (void *argument) {
+  (void)argument;
+
+  DAP_Setup();                          // DAP Setup 
+
+  USBD_Initialize(0U);                  // USB Device Initialization
+#ifdef LPC_LINK2_ONBOARD
+  char *ser_num;
+  ser_num = GetSerialNum();
+  if (ser_num != NULL) {
+    USBD_SetSerialNumber(0U, ser_num);  // Update Serial Number
+  }
+#endif
+  USBD_Connect(0U);                     // USB Device Connect
+
+  while (!USBD_Configured(0U));         // Wait for USB Device to configure
+
+  LED_CONNECTED_OUT(1U);                // Turn on  Debugger Connected LED
+  LED_RUNNING_OUT(1U);                  // Turn on  Target Running LED
+  Delayms(500U);                        // Wait for 500ms
+  LED_RUNNING_OUT(0U);                  // Turn off Target Running LED
+  LED_CONNECTED_OUT(0U);                // Turn off Debugger Connected LED
+
+  // Create DAP Thread
+  DAP_ThreadId = osThreadNew(DAP_Thread, NULL, &DAP_ThreadAttr);
+
+  // Create SWO Thread
+  SWO_ThreadId = osThreadNew(SWO_Thread, NULL, &SWO_ThreadAttr);
+
+  osDelay(osWaitForever);
+  for (;;) {}
+}
+
+int main (void) {
+
+  SystemCoreClockUpdate();
+  osKernelInitialize();                 // Initialize CMSIS-RTOS
+  osThreadNew(app_main, NULL, NULL);    // Create application main thread
+  if (osKernelGetState() == osKernelReady) {
+    osKernelStart();                    // Start thread execution
+  }
+
+  for (;;) {}
+}