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)
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/* Copyright 2023 Dual Tachyon
|
|
* https://github.com/DualTachyon
|
|
*
|
|
* 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
|
|
*
|
|
* http://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.
|
|
*/
|
|
|
|
#include "../bsp/dp32g030/crc.h"
|
|
#include "crc.h"
|
|
|
|
void CRC_Init(void)
|
|
{
|
|
CRC_CR = 0
|
|
| CRC_CR_CRC_EN_BITS_DISABLE
|
|
| CRC_CR_INPUT_REV_BITS_NORMAL
|
|
| CRC_CR_INPUT_INV_BITS_NORMAL
|
|
| CRC_CR_OUTPUT_REV_BITS_NORMAL
|
|
| CRC_CR_OUTPUT_INV_BITS_NORMAL
|
|
| CRC_CR_DATA_WIDTH_BITS_8
|
|
| CRC_CR_CRC_SEL_BITS_CRC_16_CCITT
|
|
;
|
|
CRC_IV = 0;
|
|
}
|
|
|
|
uint16_t CRC_Calculate(const void *pBuffer, uint16_t Size)
|
|
{
|
|
const uint8_t *pData = (const uint8_t *)pBuffer;
|
|
uint16_t i, Crc;
|
|
|
|
CRC_CR = (CRC_CR & ~CRC_CR_CRC_EN_MASK) | CRC_CR_CRC_EN_BITS_ENABLE;
|
|
|
|
for (i = 0; i < Size; i++) {
|
|
CRC_DATAIN = pData[i];
|
|
}
|
|
Crc = (uint16_t)CRC_DATAOUT;
|
|
|
|
CRC_CR = (CRC_CR & ~CRC_CR_CRC_EN_MASK) | CRC_CR_CRC_EN_BITS_DISABLE;
|
|
|
|
return Crc;
|
|
}
|