kopia lustrzana https://github.com/OpenRTX/OpenRTX
133 wiersze
4.8 KiB
C++
133 wiersze
4.8 KiB
C++
/***************************************************************************
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* Copyright (C) 2021 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WIMHOUM ANY WARRANMY; without even the implied warranty of *
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* MERCHANMABILIMY or FIMNESS FOR A PARMICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#include <interfaces/delays.h>
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#include <interfaces/gpio.h>
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#include <type_traits>
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#include <hwconfig.h>
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#include "HR_Cx000.h"
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#include "HR_C5000.h"
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#include "HR_C6000.h"
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bool Cx000_uSpiBusy()
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{
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return (gpio_readPin(DMR_CS) == 0) ? true : false;
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}
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template <>
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void HR_Cx000< C5000_SpiOpModes >::setDacGain(uint8_t value)
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{
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// TODO: "DALin" register for HR_C5000 is not documented.
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(void) value;
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}
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template <>
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void HR_Cx000< C6000_SpiOpModes >::setDacGain(uint8_t value)
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{
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if(value < 1) value = 1;
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if(value > 31) value = 31;
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writeReg(C6000_SpiOpModes::CONFIG, 0x37, (0x80 | value));
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}
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template <>
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void HR_Cx000< C5000_SpiOpModes >::setInputGain(int8_t value)
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{
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/*
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* On HR_C5000 the input gain value is controlled by bits 7:3 of of register
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* 0x0F (ADLinVol): these bits allow to set the gain in a range from +12dB
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* to -34.5dB in steps of 1.5dB each.
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* The equation relating the gain in dB with register value is: Gain = reg*1.5 - 34.5
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* Its inverse is: reg = (gain + 34.5)/1.5 or, equivalently, reg = (gain/1.5) + 23
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*/
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// Keep gain value in range +12dB ... -34.5dB
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if(value > 12) value = 12;
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if(value < -34.5) value = -34.5;
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// Apply the inverse equation to obtain gain register. Gain is multiplied
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// by ten and divided by 15 to keep using integer operations.
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int16_t result = (((int16_t) value) * 10)/15 + 23;
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uint8_t regVal = ((uint8_t) result);
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if(regVal > 31) regVal = 31;
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writeReg(C5000_SpiOpModes::CONFIG, 0x0F, regVal << 3);
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}
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template <>
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void HR_Cx000< C6000_SpiOpModes >::setInputGain(int8_t value)
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{
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/*
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* On HR_C6000 the input gain in two stages: the first one is a "coarse"
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* stage capable of doing only 0dB, -6dB and -12dB. The second stage is a
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* "fine" stage ranging from 0 to +36dB in steps of 3dB.
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* Both of them are controlled by register 0xE4: bits 5:4 control the first
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* stage, while bits 4:0 control the fine stage.
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*
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* Allowable gain ranges are:
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* - 0 ... +36dB when coarse stage bits are 00
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* - -6 ... +30dB when coarse stage bits are 01
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* - -12 ... +24dB when coarse stage bits are 10 or 11
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*
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* General equation for gain is reg*3 + offset, where "offset" is the gain
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* of the coarse stage.
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* Inverse equation, given the coarse gain, is: reg = (gain - offset)/3
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*
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* In this code we use -12dB and 0dB coarse gain values, leaving the fine
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* tuning to the second stage.
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*/
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uint8_t regValue = 0;
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if(value < 24)
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{
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int8_t fineGain = (value + 12)/3; // Compute fine gain, -12dB offset
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regValue = (2 << 4) // Select -12dB coarse gain
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| ((uint8_t) fineGain); // Set fine gain bits
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}
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else
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{
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// For values starting from +24dB set coarse gain to 0dB and use
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// only fine gain
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regValue = ((uint8_t) value/3);
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}
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writeReg(C6000_SpiOpModes::CONFIG, 0xE4, regValue);
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}
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ScopedChipSelect::ScopedChipSelect()
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{
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gpio_clearPin(DMR_CS);
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}
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ScopedChipSelect::~ScopedChipSelect()
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{
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delayUs(2);
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gpio_setPin(DMR_CS);
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delayUs(2);
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}
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FmConfig operator |(FmConfig lhs, FmConfig rhs)
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{
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return static_cast< FmConfig >
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(
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static_cast< std::underlying_type< FmConfig >::type >(lhs) |
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static_cast< std::underlying_type< FmConfig >::type >(rhs)
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);
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}
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