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AnalogReadFast

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Version copied from CommandStation
This commit is contained in:
Asbelos 2020-07-25 11:00:04 +01:00
parent 34dde6fe12
commit 7af5effba9
3 changed files with 102 additions and 56 deletions
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101
AnalogReadFast.h Normal file
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@ -0,0 +1,101 @@
/*
* AnalogReadFast.h
*
* Copyright (C) 2016 Albert van Dalen http://www.avdweb.nl
*
* This file is part of CommandStation.
*
* CommandStation is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* CommandStation 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.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef COMMANDSTATION_DCC_ANALOGREADFAST_H_
#define COMMANDSTATION_DCC_ANALOGREADFAST_H_
#include <Arduino.h>
int inline analogReadFast(uint8_t ADCpin);
#if defined(ARDUINO_ARCH_SAMD)
int inline analogReadFast(uint8_t ADCpin)
{ ADC->CTRLA.bit.ENABLE = 0; // disable ADC
while( ADC->STATUS.bit.SYNCBUSY == 1 ); // wait for synchronization
int CTRLBoriginal = ADC->CTRLB.reg;
int AVGCTRLoriginal = ADC->AVGCTRL.reg;
int SAMPCTRLoriginal = ADC->SAMPCTRL.reg;
ADC->CTRLB.reg &= 0b1111100011111111; // mask PRESCALER bits
ADC->CTRLB.reg |= ADC_CTRLB_PRESCALER_DIV64; // divide Clock by 64
ADC->AVGCTRL.reg = ADC_AVGCTRL_SAMPLENUM_1 | // take 1 sample
ADC_AVGCTRL_ADJRES(0x00ul); // adjusting result by 0
ADC->SAMPCTRL.reg = 0x00; // sampling Time Length = 0
ADC->CTRLA.bit.ENABLE = 1; // enable ADC
while(ADC->STATUS.bit.SYNCBUSY == 1); // wait for synchronization
int adc = analogRead(ADCpin);
ADC->CTRLB.reg = CTRLBoriginal;
ADC->AVGCTRL.reg = AVGCTRLoriginal;
ADC->SAMPCTRL.reg = SAMPCTRLoriginal;
return adc;
}
#elif defined(ARDUINO_ARCH_SAMC)
int inline analogReadFast(uint8_t ADCpin)
{
Adc* ADC;
if ( (g_APinDescription[ADCpin].ulPeripheralAttribute & PER_ATTR_ADC_MASK) == PER_ATTR_ADC_STD ) {
ADC = ADC0;
} else {
ADC = ADC1;
}
ADC->CTRLA.bit.ENABLE = 0; // disable ADC
while( ADC->SYNCBUSY.bit.ENABLE == 1 ); // wait for synchronization
int CTRLBoriginal = ADC->CTRLB.reg;
int AVGCTRLoriginal = ADC->AVGCTRL.reg;
int SAMPCTRLoriginal = ADC->SAMPCTRL.reg;
ADC->CTRLB.reg &= 0b1111100011111111; // mask PRESCALER bits
ADC->CTRLB.reg |= ADC_CTRLB_PRESCALER_DIV64; // divide Clock by 64
ADC->AVGCTRL.reg = ADC_AVGCTRL_SAMPLENUM_1 | // take 1 sample
ADC_AVGCTRL_ADJRES(0x00ul); // adjusting result by 0
ADC->SAMPCTRL.reg = 0x00; // sampling Time Length = 0
ADC->CTRLA.bit.ENABLE = 1; // enable ADC
while(ADC->SYNCBUSY.bit.ENABLE == 1); // wait for synchronization
int adc = analogRead(ADCpin);
ADC->CTRLB.reg = CTRLBoriginal;
ADC->AVGCTRL.reg = AVGCTRLoriginal;
ADC->SAMPCTRL.reg = SAMPCTRLoriginal;
return adc;
}
#else
int inline analogReadFast(uint8_t ADCpin)
{ byte ADCSRAoriginal = ADCSRA;
ADCSRA = (ADCSRA & B11111000) | 4;
int adc = analogRead(ADCpin);
ADCSRA = ADCSRAoriginal;
return adc;
}
#endif
#endif // COMMANDSTATION_DCC_ANALOGREADFAST_H_

2
Hardware.cpp
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@ -19,7 +19,7 @@
#include <Arduino.h>
//#include <TimerOne.h> // use IDE menu Tools..Manage Libraries to locate and install TimerOne
#include <ArduinoTimers.h> // use IDE menu Tools..Manage Libraries to locate and install TimerOne
#include "avdweb_AnalogReadFast.h"
#include "AnalogReadFast.h"
#include "Hardware.h"
#include "Config.h"
#include "DIAG.h"

55
avdweb_AnalogReadFast.h
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@ -1,55 +0,0 @@
/*
Copyright (C) 2016 Albert van Dalen http://www.avdweb.nl
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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 at http://www.gnu.org/licenses .
AUTHOR: Albert van Dalen
WEBSITE: http://www.avdweb.nl/arduino/libraries/fast-10-bit-adc.html
UPDATE: https://www.avdweb.nl/arduino/adc-dac/fast-10-bit-adc
HISTORY:
1.0.0 7-3-2018 analogReadFast for SAMD21 (10/12bit) and AVR (10bit)
*/
#ifndef analogReadFast_H
#define analogReadFast_H
int inline analogReadFast(byte ADCpin);
#if defined(__arm__)
int inline analogReadFast(byte ADCpin) // inline library functions must be in header
{ ADC->CTRLA.bit.ENABLE = 0; // disable ADC
while( ADC->STATUS.bit.SYNCBUSY == 1 ); // wait for synchronization
int CTRLBoriginal = ADC->CTRLB.reg;
int AVGCTRLoriginal = ADC->AVGCTRL.reg;
int SAMPCTRLoriginal = ADC->SAMPCTRL.reg;
ADC->CTRLB.reg &= 0b1111100011111111; // mask PRESCALER bits
ADC->CTRLB.reg |= ADC_CTRLB_PRESCALER_DIV64; // divide Clock by 64
ADC->AVGCTRL.reg = ADC_AVGCTRL_SAMPLENUM_1 | // take 1 sample
ADC_AVGCTRL_ADJRES(0x00ul); // adjusting result by 0
ADC->SAMPCTRL.reg = 0x00; // sampling Time Length = 0
ADC->CTRLA.bit.ENABLE = 1; // enable ADC
while(ADC->STATUS.bit.SYNCBUSY == 1); // wait for synchronization
int adc = analogRead(ADCpin);
ADC->CTRLB.reg = CTRLBoriginal;
ADC->AVGCTRL.reg = AVGCTRLoriginal;
ADC->SAMPCTRL.reg = SAMPCTRLoriginal;
return adc;
}
#else
int inline analogReadFast(byte ADCpin)
{ byte ADCSRAoriginal = ADCSRA;
ADCSRA = (ADCSRA & B11111000) | 4;
int adc = analogRead(ADCpin);
ADCSRA = ADCSRAoriginal;
return adc;
}
#endif
#endif