309 lines
11 KiB
C
309 lines
11 KiB
C
/***************************************************************************
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* Copyright (C) 2020 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 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 <interfaces/delays.h>
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#include "interfaces.h"
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#include "AT1846S.h"
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void _maskSetRegister(uint8_t reg, uint16_t mask, uint16_t value)
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{
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uint16_t regVal = i2c_readReg16(reg);
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regVal = (regVal & ~mask) | (value & mask);
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i2c_writeReg16(reg, regVal);
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}
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/*
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* NOTE: after some main AT1846S parameters (frequency, bandwidth, ...) are changed,
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* the chip must be "cycled" to make them effective. Cycling consists of turning
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* both TX and RX off and then switch back to the desired functionality.
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*
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* The function _reloadConfig() provides an helper to do this.
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*/
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static inline void _reloadConfig()
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{
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uint16_t reg = i2c_readReg16(0x30); /* Get current op. status */
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i2c_writeReg16(0x30, reg & 0xFF9F); /* RX and TX off */
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i2c_writeReg16(0x30, reg); /* Restore op. status */
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}
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void AT1846S_init()
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{
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i2c_writeReg16(0x30, 0x0001); /* Soft reset */
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delayMs(160);
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i2c_writeReg16(0x30, 0x0004); // Set pdn_reg (power down pin)
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i2c_writeReg16(0x04, 0x0FD0); // Set clk_mode to 25.6MHz/26MHz
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i2c_writeReg16(0x0A, 0x7C20); // Set 0x0A to its default value
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i2c_writeReg16(0x13, 0xA100);
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i2c_writeReg16(0x1F, 0x1001); // Set gpio0 to ctcss_out/css_int/css_cmp
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// and gpio6 to sq, sq&ctcss/cdcss when sq_out_set=1
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i2c_writeReg16(0x31, 0x0031);
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i2c_writeReg16(0x33, 0x44A5);
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i2c_writeReg16(0x34, 0x2B89);
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i2c_writeReg16(0x41, 0x4122); // Set voice_gain_tx (voice digital gain) to 0x22
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i2c_writeReg16(0x42, 0x1052);
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i2c_writeReg16(0x43, 0x0100);
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i2c_writeReg16(0x44, 0x07FF); // Set gain_tx (voice digital gain after tx ADC downsample) to 0x7
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i2c_writeReg16(0x59, 0x0B90); // Set c_dev (CTCSS/CDCSS TX FM deviation) to 0x10
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// and xmitter_dev (voice/subaudio TX FM deviation) to 0x2E
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i2c_writeReg16(0x47, 0x7F2F);
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i2c_writeReg16(0x4F, 0x2C62);
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i2c_writeReg16(0x53, 0x0094);
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i2c_writeReg16(0x54, 0x2A3C);
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i2c_writeReg16(0x55, 0x0081);
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i2c_writeReg16(0x56, 0x0B02);
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i2c_writeReg16(0x57, 0x1C00);
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i2c_writeReg16(0x58, 0x9CDD); // Set ctcss_lpfil_bw to 250Hz bandwidth
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// and bypass ctcss_highpass_filter
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// and bypass ctcss_lowpass_filter
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// and enable void_lowpass_filter
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// and bypass voice_highpass_filter
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// and bypass pre/de-emphasis
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// and bypass vox_highpass_filter
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// and bypass vox_lowpass_filter
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// and enable rssi_lpfil_bw
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i2c_writeReg16(0x5A, 0x06DB);
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i2c_writeReg16(0x63, 0x16AD);
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i2c_writeReg16(0x67, 0x0628); // Set DTMF C0 697Hz to ???
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i2c_writeReg16(0x68, 0x05E5); // Set DTMF C1 770Hz to 13MHz and 26MHz
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i2c_writeReg16(0x69, 0x0555); // Set DTMF C2 852Hz to ???
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i2c_writeReg16(0x6A, 0x04B8); // Set DTMF C3 941Hz to ???
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i2c_writeReg16(0x6B, 0x02FE); // Set DTMF C4 1209Hz to 13MHz and 26MHz
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i2c_writeReg16(0x6C, 0x01DD); // Set DTMF C5 1336Hz
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i2c_writeReg16(0x6D, 0x00B1); // Set DTMF C6 1477Hz
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i2c_writeReg16(0x6E, 0x0F82); // Set DTMF C7 1633Hz
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i2c_writeReg16(0x6F, 0x017A); // Set DTMF C0 2nd harmonic
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i2c_writeReg16(0x70, 0x004C); // Set DTMF C1 2nd harmonic
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i2c_writeReg16(0x71, 0x0F1D); // Set DTMF C2 2nd harmonic
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i2c_writeReg16(0x72, 0x0D91); // Set DTMF C3 2nd harmonic
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i2c_writeReg16(0x73, 0x0A3E); // Set DTMF C4 2nd harmonic
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i2c_writeReg16(0x74, 0x090F); // Set DTMF C5 2nd harmonic
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i2c_writeReg16(0x75, 0x0833); // Set DTMF C6 2nd harmonic
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i2c_writeReg16(0x76, 0x0806); // Set DTMF C7 2nd harmonic
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i2c_writeReg16(0x30, 0x40A4); // Set pdn_pin (power down enable)
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// and set rx_on
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// and set mute when rxno
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// and set xtal_mode to 26MHz/13MHz
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delayMs(160);
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i2c_writeReg16(0x30, 0x40A6); /* Start calibration */
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delayMs(160);
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i2c_writeReg16(0x30, 0x4006); /* Stop calibration */
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delayMs(160);
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i2c_writeReg16(0x40, 0x0031);
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}
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void AT1846S_terminate()
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{
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AT1846S_disableCtcss();
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AT1846S_setFuncMode(AT1846S_OFF);
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}
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void AT1846S_setFrequency(const freq_t freq)
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{
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/* The value to be written in registers is given by: 0.0016*freqency */
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uint32_t val = (freq/1000)*16;
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uint16_t fHi = (val >> 16) & 0xFFFF;
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uint16_t fLo = val & 0xFFFF;
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i2c_writeReg16(0x05, 0x8763);
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i2c_writeReg16(0x29, fHi);
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i2c_writeReg16(0x2A, fLo);
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_reloadConfig();
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}
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void AT1846S_setBandwidth(const AT1846S_bw_t band)
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{
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if(band == AT1846S_BW_25)
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{
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/* 25kHz bandwidth */
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i2c_writeReg16(0x15, 0x1F00);
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i2c_writeReg16(0x32, 0x7564);
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i2c_writeReg16(0x3A, 0x04C3);
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i2c_writeReg16(0x3C, 0x1B34);
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i2c_writeReg16(0x3F, 0x29D1);
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i2c_writeReg16(0x48, 0x1F3C);
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i2c_writeReg16(0x60, 0x0F17);
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i2c_writeReg16(0x62, 0x3263);
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i2c_writeReg16(0x65, 0x248A);
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i2c_writeReg16(0x66, 0xFFAE);
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i2c_writeReg16(0x7F, 0x0001);
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i2c_writeReg16(0x06, 0x0024);
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i2c_writeReg16(0x07, 0x0214);
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i2c_writeReg16(0x08, 0x0224);
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i2c_writeReg16(0x09, 0x0314);
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i2c_writeReg16(0x0A, 0x0324);
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i2c_writeReg16(0x0B, 0x0344);
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i2c_writeReg16(0x0C, 0x0384);
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i2c_writeReg16(0x0D, 0x1384);
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i2c_writeReg16(0x0E, 0x1B84);
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i2c_writeReg16(0x0F, 0x3F84);
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i2c_writeReg16(0x12, 0xE0EB);
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i2c_writeReg16(0x7F, 0x0000);
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_maskSetRegister(0x30, 0x3000, 0x3000);
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}
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else
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{
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/* 12.5kHz bandwidth */
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i2c_writeReg16(0x15, 0x1100);
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i2c_writeReg16(0x32, 0x4495);
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i2c_writeReg16(0x3A, 0x00C3);
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i2c_writeReg16(0x3F, 0x29D1);
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i2c_writeReg16(0x3C, 0x1B34);
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i2c_writeReg16(0x48, 0x19B1);
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i2c_writeReg16(0x60, 0x0F17);
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i2c_writeReg16(0x62, 0x1425);
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i2c_writeReg16(0x65, 0x2494);
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i2c_writeReg16(0x66, 0xEB2E);
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i2c_writeReg16(0x7F, 0x0001);
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i2c_writeReg16(0x06, 0x0014);
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i2c_writeReg16(0x07, 0x020C);
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i2c_writeReg16(0x08, 0x0214);
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i2c_writeReg16(0x09, 0x030C);
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i2c_writeReg16(0x0A, 0x0314);
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i2c_writeReg16(0x0B, 0x0324);
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i2c_writeReg16(0x0C, 0x0344);
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i2c_writeReg16(0x0D, 0x1344);
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i2c_writeReg16(0x0E, 0x1B44);
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i2c_writeReg16(0x0F, 0x3F44);
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i2c_writeReg16(0x12, 0xE0EB);
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i2c_writeReg16(0x7F, 0x0000);
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_maskSetRegister(0x30, 0x3000, 0x0000);
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}
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_reloadConfig();
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}
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void AT1846S_setOpMode(const AT1846S_op_t mode)
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{
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if(mode == AT1846S_OP_DMR)
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{
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/* TODO: DMR mode */
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}
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else
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{
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/* FM mode */
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i2c_writeReg16(0x58, 0x9C1D);
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i2c_writeReg16(0x40, 0x0030);
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}
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_reloadConfig();
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}
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void AT1846S_setFuncMode(const AT1846S_func_t mode)
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{
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/*
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* Functional mode is controlled by bits 5 (RX on) and 6 (TX on) in register
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* 0x30. With a cast and shift we can do it easily...
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*
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* Note about sanity check: if value is greater than 0x0040 we are trying to
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* turn on both RX and TX, which is NOT good.
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*/
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uint16_t value = ((uint16_t) mode) << 5;
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if(value > 0x0040) return;
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_maskSetRegister(0x30, 0x0060, value);
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// i2c_writeReg16(0x44, 0x4ff);
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}
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void AT1846S_enableTxCtcss(tone_t freq)
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{
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i2c_writeReg16(0x4A, freq*10);
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i2c_writeReg16(0x4B, 0x0000);
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i2c_writeReg16(0x4C, 0x0000);
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_maskSetRegister(0x4E, 0x0600, 0x0600);
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}
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void AT1846S_disableCtcss()
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{
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i2c_writeReg16(0x4A, 0x0000);
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_maskSetRegister(0x4E, 0x0600, 0x0000); /* Disable TX CTCSS */
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}
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uint16_t AT1846S_readRSSI()
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{
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return i2c_readReg16(0x1B);
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}
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void AT1846S_setPgaGain(const uint8_t gain)
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{
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uint16_t pga = (gain & 0x1F) << 6;
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_maskSetRegister(0x0A, 0x07C0, pga);
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}
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void AT1846S_setMicGain(const uint8_t gain)
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{
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_maskSetRegister(0x41, 0x007F, ((uint16_t) gain));
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}
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void AT1846S_setAgcGain(const uint8_t gain)
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{
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uint16_t agc = (gain & 0x0F) << 8;
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_maskSetRegister(0x44, 0x0F00, agc);
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}
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void AT1846S_setTxDeviation(const uint16_t dev)
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{
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uint16_t value = (dev & 0x03FF) << 6;
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_maskSetRegister(0x59, 0xFFC0, value);
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}
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void AT1846S_setRxAudioGain(const uint8_t gainWb, const uint8_t gainNb)
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{
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uint16_t value = (gainWb & 0x0F) << 8;
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_maskSetRegister(0x44, 0x0F00, value);
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_maskSetRegister(0x44, 0x000F, ((uint16_t) gainNb));
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}
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void AT1846S_setNoise1Thresholds(const uint8_t highTsh, const uint8_t lowTsh)
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{
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uint16_t value = ((highTsh & 0x1f) << 8) | (lowTsh & 0x1F);
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i2c_writeReg16(0x48, value);
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}
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void AT1846S_setNoise2Thresholds(const uint8_t highTsh, const uint8_t lowTsh)
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{
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uint16_t value = ((highTsh & 0x1f) << 8) | (lowTsh & 0x1F);
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i2c_writeReg16(0x60, value);
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}
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void AT1846S_setRssiThresholds(const uint8_t highTsh, const uint8_t lowTsh)
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{
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uint16_t value = ((highTsh & 0x1f) << 8) | (lowTsh & 0x1F);
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i2c_writeReg16(0x3F, value);
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}
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void AT1846S_setPaDrive(const uint8_t value)
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{
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uint16_t pa = value << 11;
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_maskSetRegister(0x0A, 0x7800, pa);
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}
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void AT1846S_setAnalogSqlThresh(const uint8_t thresh)
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{
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i2c_writeReg16(0x49, ((uint16_t) thresh));
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}
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