113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
/*
|
|
* Authors (alphabetical order)
|
|
* - Andre Bernet <bernet.andre@gmail.com>
|
|
* - Bertrand Songis <bsongis@gmail.com>
|
|
* - Bryan J. Rentoul (Gruvin) <gruvin@gmail.com>
|
|
* - Cameron Weeks <th9xer@gmail.com>
|
|
* - Erez Raviv
|
|
* - Jean-Pierre Parisy
|
|
* - Karl Szmutny <shadow@privy.de>
|
|
* - Michael Blandford
|
|
* - Michal Hlavinka
|
|
* - Pat Mackenzie
|
|
* - Philip Moss
|
|
* - Rob Thomson
|
|
* - Romolo Manfredini <romolo.manfredini@gmail.com>
|
|
* - Thomas Husterer
|
|
*
|
|
* open9x is based on code named
|
|
* gruvin9x by Bryan J. Rentoul: http://code.google.com/p/gruvin9x/,
|
|
* er9x by Erez Raviv: http://code.google.com/p/er9x/,
|
|
* and the original (and ongoing) project by
|
|
* Thomas Husterer, th9x: http://code.google.com/p/th9x/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include "../open9x.h"
|
|
|
|
uint16_t Analog_values[NUMBER_ANALOG];
|
|
|
|
// Settings for mode register ADC_MR
|
|
// USEQ off - silicon problem, doesn't work
|
|
// TRANSFER = 1
|
|
// TRACKTIM = 4 (5 clock periods)
|
|
// ANACH = 0
|
|
// SETTLING = 1 (not used if ANACH = 0)
|
|
// STARTUP = 1 (8 clock periods)
|
|
// PRESCAL = 3.6 MHz clock (between 1 and 20MHz)
|
|
// FREERUN = 0
|
|
// FWUP = 0
|
|
// SLEEP = 0
|
|
// LOWRES = 0
|
|
// TRGSEL = 0
|
|
// TRGEN = 0 (software trigger only)
|
|
void adcInit()
|
|
{
|
|
register Adc *padc ;
|
|
register uint32_t timer ;
|
|
|
|
timer = ( Master_frequency / (3600000*2) ) << 8 ;
|
|
// Enable peripheral clock ADC = bit 29
|
|
PMC->PMC_PCER0 |= 0x20000000L ; // Enable peripheral clock to ADC
|
|
padc = ADC ;
|
|
padc->ADC_MR = 0x14110000 | timer ; // 0001 0100 0001 0001 xxxx xxxx 0000 0000
|
|
padc->ADC_ACR = ADC_ACR_TSON ; // Turn on temp sensor
|
|
#if defined(REVA)
|
|
padc->ADC_CHER = 0x0000E23E ; // channels 1,2,3,4,5,9,13,14,15
|
|
#else
|
|
padc->ADC_CHER = 0x0000E33E ; // channels 1,2,3,4,5,8,9,13,14,15
|
|
#endif
|
|
padc->ADC_CGR = 0 ; // Gain = 1, all channels
|
|
padc->ADC_COR = 0 ; // Single ended, 0 offset, all channels
|
|
}
|
|
|
|
// Read 8 (9 for REVB) ADC channels
|
|
// Documented bug, must do them 1 by 1
|
|
void adcRead()
|
|
{
|
|
register Adc *padc;
|
|
register uint32_t y;
|
|
register uint32_t x;
|
|
|
|
padc = ADC;
|
|
y = padc->ADC_ISR; // Clear EOC flags
|
|
for (y = NUMBER_ANALOG+1; --y > 0;) {
|
|
padc->ADC_CR = 2; // Start conversion
|
|
x = 0;
|
|
while ((padc->ADC_ISR & 0x01000000) == 0) {
|
|
// wait for DRDY flag
|
|
if (++x > 1000000) {
|
|
break; // Software timeout
|
|
}
|
|
}
|
|
x = padc->ADC_LCDR; // Clear DRSY flag
|
|
}
|
|
// Next bit may be done using the PDC
|
|
Analog_values[0] = ADC->ADC_CDR1;
|
|
Analog_values[1] = ADC->ADC_CDR2;
|
|
Analog_values[2] = ADC->ADC_CDR3;
|
|
Analog_values[3] = ADC->ADC_CDR4;
|
|
Analog_values[4] = ADC->ADC_CDR5;
|
|
Analog_values[5] = ADC->ADC_CDR9;
|
|
Analog_values[6] = ADC->ADC_CDR13;
|
|
Analog_values[7] = ADC->ADC_CDR14;
|
|
|
|
#if !defined(REVA)
|
|
Analog_values[8] = ADC->ADC_CDR8 ;
|
|
#endif
|
|
|
|
temperature = (((int32_t)temperature * 7) + ((((int32_t)ADC->ADC_CDR15 - 838) * 621) >> 11)) >> 3; // Filter it
|
|
if (get_tmr10ms() >= 100 && temperature > maxTemperature) {
|
|
maxTemperature = temperature;
|
|
}
|
|
}
|