mirror of https://github.com/marqs85/ossc.git
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
//
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// Copyright (C) 2017 Markus Hiienkari <mhiienka@niksula.hut.fi>
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//
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// This file is part of Open Source Scan Converter project.
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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 WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR 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 <stdio.h>
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#include <unistd.h>
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#include "system.h"
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#include "i2c_opencores.h"
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#include "pcm1862.h"
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inline alt_u32 pcm1862_readreg(alt_u8 regaddr)
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{
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//Phase 1
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I2C_start(I2CA_BASE, PCM1862_BASE, 0);
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I2C_write(I2CA_BASE, regaddr, 0);
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//Phase 2
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I2C_start(I2CA_BASE, PCM1862_BASE, 1);
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return I2C_read(I2CA_BASE,1);
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}
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inline void pcm1862_writereg(alt_u8 regaddr, alt_u8 data)
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{
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I2C_start(I2CA_BASE, PCM1862_BASE, 0);
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I2C_write(I2CA_BASE, regaddr, 0);
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I2C_write(I2CA_BASE, data, 1);
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}
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void pcm_source_sel(pcm_input_t input) {
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alt_u8 adc_ch = 1<<input;
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pcm1862_writereg(PCM1862_ADC1L, (1<<6)|adc_ch);
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pcm1862_writereg(PCM1862_ADC1R, (1<<6)|adc_ch);
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}
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void pcm_set_gain(alt_8 db_gain) {
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alt_8 gain_val = 2*db_gain;
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pcm1862_writereg(PCM1862_PGA1L, gain_val);
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pcm1862_writereg(PCM1862_PGA1R, gain_val);
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}
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int pcm1862_init()
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{
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if (pcm1862_readreg(0x05) != 0x86)
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return 0;
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pcm1862_writereg(PCM1862_PWR_CTRL, 0x75);
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//pcm1862_writereg(0x00, 0xff);
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pcm1862_writereg(PCM1862_CLKCONFIG, 0x90);
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pcm1862_writereg(PCM1862_DSP1_CLKDIV, 0x00);
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pcm1862_writereg(PCM1862_DSP2_CLKDIV, 0x00);
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pcm1862_writereg(PCM1862_ADC_CLKDIV, 0x03);
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pcm1862_writereg(PCM1862_PLLCONFIG, 0x00);
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pcm1862_writereg(PCM1862_DSP_CTRL, 0xB0);
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pcm1862_writereg(PCM1862_PWR_CTRL, 0x70);
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return 1;
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}
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