130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
/*
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* Authors (alphabetical order)
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* - Andre Bernet <bernet.andre@gmail.com>
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* - Andreas Weitl
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* - Bertrand Songis <bsongis@gmail.com>
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* - Bryan J. Rentoul (Gruvin) <gruvin@gmail.com>
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* - Cameron Weeks <th9xer@gmail.com>
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* - Erez Raviv
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* - Gabriel Birkus
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* - Jean-Pierre Parisy
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* - Karl Szmutny
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* - Michael Blandford
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* - Michal Hlavinka
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* - Pat Mackenzie
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* - Philip Moss
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* - Rob Thomson
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* - Romolo Manfredini <romolo.manfredini@gmail.com>
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* - Thomas Husterer
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*
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* opentx is based on code named
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* gruvin9x by Bryan J. Rentoul: http://code.google.com/p/gruvin9x/,
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* er9x by Erez Raviv: http://code.google.com/p/er9x/,
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* and the original (and ongoing) project by
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* Thomas Husterer, th9x: http://code.google.com/p/th9x/
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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 version 2 as
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* published by the Free Software Foundation.
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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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*/
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#include "../opentx.h"
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volatile uint16_t Analog_values[NUMBER_ANALOG];
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#if defined(TARANIS_STICKS)
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const char ana_direction[NUMBER_ANALOG] = {1, 1, 0, 1 ,0 ,1 ,0, 0, 0};
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#endif
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// Settings for mode register ADC_MR
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// USEQ off - silicon problem, doesn't work
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// TRANSFER = 3
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// TRACKTIM = 15 (16 clock periods)
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// ANACH = 1
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// SETTLING = 6 (not used if ANACH = 0)
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// STARTUP = 6 (96 clock periods)
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// PRESCAL = 9.0 MHz clock (between 1 and 20MHz)
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// FREERUN = 0
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// FWUP = 0
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// SLEEP = 0
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// LOWRES = 0
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// TRGSEL = 0
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// TRGEN = 0 (software trigger only)
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void adcInit()
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{
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register Adc *padc ;
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register uint32_t timer ;
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timer = ( Master_frequency / (3600000*2) ) << 8 ;
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// Enable peripheral clock ADC = bit 29
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PMC->PMC_PCER0 |= 0x20000000L ; // Enable peripheral clock to ADC
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padc = ADC ;
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padc->ADC_MR = 0x3FB60000 | timer ; // 0011 1111 1011 0110 xxxx xxxx 0000 0000
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padc->ADC_ACR = ADC_ACR_TSON ; // Turn on temp sensor
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#if defined(REVA)
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padc->ADC_CHER = 0x0000E23E ; // channels 1,2,3,4,5,9,13,14,15
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#else
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padc->ADC_CHER = 0x0000E33E ; // channels 1,2,3,4,5,8,9,13,14,15
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#endif
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padc->ADC_CGR = 0 ; // Gain = 1, all channels
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padc->ADC_COR = 0 ; // Single ended, 0 offset, all channels
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}
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// Read 8 (9 for REVB) ADC channels
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// Documented bug, must do them 1 by 1
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void adcRead()
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{
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register Adc *padc;
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register uint32_t y;
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register uint32_t x;
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padc = ADC;
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y = padc->ADC_ISR; // Clear EOC flags
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for (y = NUMBER_ANALOG+1; --y > 0;) {
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padc->ADC_CR = 2; // Start conversion
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x = 0;
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while ((padc->ADC_ISR & 0x01000000) == 0) {
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// wait for DRDY flag
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if (++x > 1000000) {
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break; // Software timeout
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}
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}
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x = padc->ADC_LCDR; // Clear DRSY flag
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}
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// Next bit may be done using the PDC
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Analog_values[0] = ADC->ADC_CDR1;
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Analog_values[1] = ADC->ADC_CDR2;
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Analog_values[2] = ADC->ADC_CDR3;
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Analog_values[3] = ADC->ADC_CDR4;
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Analog_values[4] = ADC->ADC_CDR5;
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Analog_values[5] = ADC->ADC_CDR9;
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Analog_values[6] = ADC->ADC_CDR13;
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Analog_values[7] = ADC->ADC_CDR14;
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#if !defined(REVA)
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Analog_values[8] = ADC->ADC_CDR8 ;
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#endif
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temperature = (((int32_t)temperature * 7) + ((((int32_t)ADC->ADC_CDR15 - 838) * 621) >> 11)) >> 3; // Filter it
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if (get_tmr10ms() >= 100 && temperature > maxTemperature) {
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maxTemperature = temperature;
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}
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// adc direction correct
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#if defined(TARANIS_STICKS)
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uint32_t i ;
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for (i=0; i<NUMBER_ANALOG; i++) {
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if (ana_direction[i]) {
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Analog_values[i] = 4096-Analog_values[i];
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}
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}
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#endif
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}
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