kopia lustrzana https://github.com/mobilinkd/tnc3-firmware
67 wiersze
1.9 KiB
C++
67 wiersze
1.9 KiB
C++
// Copyright 2020 Rob Riggs <rob@mobilinkd.com>
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// All rights reserved.
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#include "Fsk9600Modulator.hpp"
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namespace mobilinkd { namespace tnc {
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/*
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* Cosine.
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const Fsk9600Modulator::cos_table_type Fsk9600Modulator::cos_table = {
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2047, 2020, 1937, 1801, 1616, 1387, 1120, 822, 502, 169,
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-169, -502, -822, -1120, -1387, -1616, -1801, -1937, -2020, -2048
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};
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*/
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/*
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* Square wave -- filtered in hardware at 7200Hz
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const Fsk9600Modulator::cos_table_type Fsk9600Modulator::cos_table = {
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2047, 2047, 2047, 2047, 2047, 2047, 2047, 2047, 2047, 2047,
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-2048, -2048, -2048, -2048, -2048, -2048, -2048, -2048, -2048, -2048
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};
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*/
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// Gaussian
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const Fsk9600Modulator::cos_table_type Fsk9600Modulator::cos_table = {
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2042, 2027, 1995, 1931, 1815, 1626, 1345, 968, 507, 0,
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-507, -968, -1345, -1626, -1815, -1931, -1995, -2027, -2042, -2048
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};
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void Fsk9600Modulator::init(const kiss::Hardware& hw)
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{
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for (auto& x : buffer_) x = 2048;
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(void) hw; // unused
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state = State::STOPPED;
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level = Level::HIGH;
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SysClock80();
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// Configure 80MHz clock for 192ksps.
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htim7.Init.Period = 416;
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if (HAL_TIM_Base_Init(&htim7) != HAL_OK)
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{
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ERROR("htim7 init failed");
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CxxErrorHandler();
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}
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DAC_ChannelConfTypeDef sConfig;
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sConfig.DAC_SampleAndHold = DAC_SAMPLEANDHOLD_DISABLE;
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sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
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sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
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sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_ENABLE;
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sConfig.DAC_UserTrimming = DAC_TRIMMING_FACTORY;
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if (HAL_DAC_ConfigChannel(&hdac1, &sConfig, DAC_CHANNEL_1) != HAL_OK)
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{
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CxxErrorHandler();
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}
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if (HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_1, DAC_ALIGN_12B_R, 2048) != HAL_OK) CxxErrorHandler();
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if (HAL_DAC_Start(&hdac1, DAC_CHANNEL_1) != HAL_OK) CxxErrorHandler();
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}
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}} // mobilinkd::tnc
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