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ADC config

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This commit is contained in:
pmantoine 2022-04-05 12:53:11 +08:00
parent 7312951b2b
commit 5ccef35074
3 changed files with 33 additions and 1 deletions
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1
CommandStation-EX.ino
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@ -101,7 +101,6 @@ void setup()
// Invoke any DCC++EX commands in the form "SETUP("xxxx");"" found in optional file mySetup.h.
// This can be used to create turnouts, outputs, sensors etc. through the normal text commands.
// PMA - how to handle __has_include??
#if __has_include ( "mySetup.h")
#define SETUP(cmd) DCCEXParser::parse(F(cmd))
#include "mySetup.h"

25
DCCTimerSAMD.cpp
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@ -37,8 +37,33 @@ INTERRUPT_CALLBACK interruptHandler=0;
void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
interruptHandler=callback;
// PMA - SAMC used on Firebox has 2 ADCs, so choose which to set up based on pin being used
// TODO: this code will need to be fixed - ADCpin is not in scope... as this is stolen from
// the abandoned rf24 branch
#if defined(ARDUINO_ARCH_SAMC)
Adc* ADC;
if ( (g_APinDescription[ADCpin].ulPeripheralAttribute & PER_ATTR_ADC_MASK) == PER_ATTR_ADC_STD ) {
ADC = ADC0;
} else {
ADC = ADC1;
}
#endif
// PMA - Set up ADC to do faster reads... default for Arduino Zero platform configs is 436uS,
// and we need sub-100uS. This code sets it to a read speed of around 21uS, and enables 12-bit
ADC->CTRLA.bit.ENABLE = 0; // disable ADC
while( ADC->STATUS.bit.SYNCBUSY == 1 ); // wait for synchronization
ADC->CTRLB.reg &= 0b1111100011111111; // mask PRESCALER bits
ADC->CTRLB.reg |= ADC_CTRLB_PRESCALER_DIV64 | // divide Clock by 64
ADC_CTRLB_RESSEL_12BIT; // Result on 12 bits
ADC->AVGCTRL.reg = ADC_AVGCTRL_SAMPLENUM_1 | // take 1 sample at a time
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
}

8
MotorDrivers.h
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@ -46,9 +46,17 @@
// (HIGH == release brake)
//
// Arduino standard Motor Shield
#if defined(ARDUINO_ARCH_SAMD)
// PMA - senseFactor for 3.3v systems is 1.95 as calculated when using 10-bit A/D samples,
// and for 12-bit samples it's more like 0.488, but we probably need to tweak both these
#define STANDARD_MOTOR_SHIELD F("STANDARD_MOTOR_SHIELD"), \
new MotorDriver(3, 12, UNUSED_PIN, 9, A0, 0.488, 2000, UNUSED_PIN), \
new MotorDriver(11, 13, UNUSED_PIN, 8, A1, 0.488, 2000, UNUSED_PIN)
#else
#define STANDARD_MOTOR_SHIELD F("STANDARD_MOTOR_SHIELD"), \
new MotorDriver(3, 12, UNUSED_PIN, 9, A0, 2.99, 2000, UNUSED_PIN), \
new MotorDriver(11, 13, UNUSED_PIN, 8, A1, 2.99, 2000, UNUSED_PIN)
#endif
// Pololu Motor Shield
#define POLOLU_MOTOR_SHIELD F("POLOLU_MOTOR_SHIELD"), \