85 lines
3 KiB
C++
Executable file
85 lines
3 KiB
C++
Executable file
/* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef control_cs42448_h_
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#define control_cs42448_h_
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#include "AudioControl.h"
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#include <math.h>
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class AudioControlCS42448 : public AudioControl
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{
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public:
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AudioControlCS42448(void) : i2c_addr(0x48), muted(true) { }
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void setAddress(uint8_t addr) {
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i2c_addr = 0x48 | (addr & 3);
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}
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bool enable(void);
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bool disable(void) {
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return false;
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}
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bool volume(float level) {
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return volumeInteger(volumebyte(level));
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}
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bool inputLevel(float level) {
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return inputLevelInteger(inputlevelbyte(level));
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}
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bool inputSelect(int n) {
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return (n == 0) ? true : false;
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}
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bool volume(int channel, float level) {
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if (channel < 1 || channel > 8) return false;
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return volumeInteger(channel, volumebyte(level));
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}
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bool inputLevel(int channel, float level) {
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if (channel < 1 || channel > 6) return false;
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return inputLevelInteger(channel, inputlevelbyte(level));
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}
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private:
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bool volumeInteger(uint32_t n);
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bool volumeInteger(int channel, uint32_t n);
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bool inputLevelInteger(int32_t n);
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bool inputLevelInteger(int chnnel, int32_t n);
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// convert level to volume byte, section 6.9.1, page 50
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uint32_t volumebyte(float level) {
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if (level >= 1.0) return 0;
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if (level <= 0.0000003981) return 128;
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return roundf(log10f(level) * -20.0);
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}
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// convert level to input gain, section 6.11.1, page 51
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int32_t inputlevelbyte(float level) {
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if (level > 15.8489) return 48;
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if (level < 0.00063095734) return -128;
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return roundf(log10f(level) * 40.0);
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}
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bool write(uint32_t address, uint32_t data);
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bool write(uint32_t address, const void *data, uint32_t len);
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uint8_t i2c_addr;
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bool muted;
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};
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#endif
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