ua1zbe
a1206d6fd4
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)
37 lines
873 B
C
37 lines
873 B
C
/* UA1ZBE Custom Firmware - RSSI Display Module
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*
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* Reads RSSI from BK4819 every 100-200ms, converts to dBm,
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* and draws an indicator on the display.
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*
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* Format: "S:42" or "-87dBm" with mini bar
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* Shown in upper-right corner of screen.
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*/
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#ifndef APP_DISPLAY_RSSI_H
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#define APP_DISPLAY_RSSI_H
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#include <stdbool.h>
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#include <stdint.h>
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/* Initialize RSSI display module */
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void RSSI_Init(void);
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/* Call from 10ms timeslice to update RSSI reading */
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void RSSI_Update(void);
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/* Draw RSSI indicator on the screen
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* x, y: position on screen
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* with_bar: if true, draw a mini signal bar next to the value */
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void RSSI_Draw(int x, int y, bool with_bar);
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/* Get current RSSI value in dBm */
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int16_t RSSI_GetdBm(void);
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/* Get raw RSSI value (0-511 from BK4819 REG_67) */
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uint16_t RSSI_GetRaw(void);
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/* Get S-meter level (0-9) */
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uint8_t RSSI_GetSLevel(void);
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#endif
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