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)
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/* Copyright 2023 Dual Tachyon
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* https://github.com/DualTachyon
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stddef.h>
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#include <string.h>
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#include "driver/eeprom.h"
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#include "driver/i2c.h"
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#include "driver/system.h"
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void EEPROM_ReadBuffer(uint16_t Address, void *pBuffer, uint8_t Size)
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{
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I2C_Start();
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I2C_Write(0xA0);
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I2C_Write((Address >> 8) & 0xFF);
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I2C_Write((Address >> 0) & 0xFF);
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I2C_Start();
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I2C_Write(0xA1);
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I2C_ReadBuffer(pBuffer, Size);
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I2C_Stop();
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}
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void EEPROM_WriteBuffer(uint16_t Address, const void *pBuffer)
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{
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if (pBuffer == NULL || Address >= 0x2000)
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return;
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uint8_t buffer[8];
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EEPROM_ReadBuffer(Address, buffer, 8);
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if (memcmp(pBuffer, buffer, 8) == 0) {
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return;
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}
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I2C_Start();
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I2C_Write(0xA0);
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I2C_Write((Address >> 8) & 0xFF);
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I2C_Write((Address >> 0) & 0xFF);
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I2C_WriteBuffer(pBuffer, 8);
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I2C_Stop();
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// give the EEPROM time to burn the data in (apparently takes 5ms)
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SYSTEM_DelayMs(8);
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}
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