mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-12-23 12:51:24 +01:00
Timer stuff with incomplete teensy
This commit is contained in:
Asbelos
parent
dd9152864b
commit
6fc223d80b
@ -147,7 +147,7 @@ void loop()
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// Report any decrease in memory (will automatically trigger on first call)
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static int ramLowWatermark = __INT_MAX__; // replaced on first loop
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int freeNow = minimumFreeMemory();
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int freeNow = DCCTimer::getMinimumFreeMemory();
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if (freeNow < ramLowWatermark) {
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ramLowWatermark = freeNow;
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LCD(3,F("Free RAM=%5db"), ramLowWatermark);
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4
DCCEX.h
4
DCCEX.h
@ -38,12 +38,12 @@
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#endif
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#include "LCD_Implementation.h"
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#include "LCN.h"
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#include "freeMemory.h"
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#include "IODevice.h"
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#include "Turnouts.h"
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#include "Sensors.h"
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#include "Outputs.h"
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#include "EXRAIL.h"
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#include "CommandDistributor.h"
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#include "TrackManager.h"
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#include "TrackManager.h"
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#include "DCCTimer.h"
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#endif
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@ -30,7 +30,6 @@
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#include "Turnouts.h"
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#include "Outputs.h"
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#include "Sensors.h"
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#include "freeMemory.h"
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#include "GITHUB_SHA.h"
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#include "version.h"
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#include "defines.h"
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@ -38,6 +37,7 @@
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#include "EEStore.h"
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#include "DIAG.h"
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#include "TrackManager.h"
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#include "DCCTimer.h"
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#include <avr/wdt.h>
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////////////////////////////////////////////////////////////////////////////////
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@ -732,7 +732,7 @@ bool DCCEXParser::parseD(Print *stream, int16_t params, int16_t p[])
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return true;
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case HASH_KEYWORD_RAM: // <D RAM>
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StringFormatter::send(stream, F("Free memory=%d\n"), minimumFreeMemory());
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StringFormatter::send(stream, F("Free memory=%d\n"), DCCTimer::getMinimumFreeMemory());
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break;
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case HASH_KEYWORD_ACK: // <D ACK ON/OFF> <D ACK [LIMIT|MIN|MAX|RETRY] Value>
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57
DCCTimer.h
57
DCCTimer.h
@ -20,6 +20,34 @@
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* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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/* There are several different implementations of this class which the compiler will select
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according to the hardware.
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*/
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/* This timer class is used to manage the single timer required to handle the DCC waveform.
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* All timer access comes through this class so that it can be compiled for
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* various hardware CPU types.
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*
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* DCCEX works on a single timer interrupt at a regular 58uS interval.
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* The DCCWaveform class generates the signals to the motor shield
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* based on this timer.
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*
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* If the motor drivers are BOTH configured to use the correct 2 pins for the architecture,
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* (see isPWMPin() function. )
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* then this allows us to use a hardware driven pin switching arrangement which is
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* achieved by setting the duty cycle of the NEXT clock interrupt to 0% or 100% depending on
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* the required pin state. (see setPWM())
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* This is more accurate than the software interrupt but at the expense of
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* limiting the choice of available pins.
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* Fortunately, a standard motor shield on a Mega uses pins that qualify for PWM...
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* Other shields may be jumpered to PWM pins or run directly using the software interrupt.
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*
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* Because the PWM-based waveform is effectively set half a cycle after the software version,
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* it is not acceptable to drive the two tracks on different methiods or it would cause
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* problems for <1 JOIN> etc.
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*
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*/
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#ifndef DCCTimer_h
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#define DCCTimer_h
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#include "Arduino.h"
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@ -32,11 +60,30 @@ class DCCTimer {
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static void getSimulatedMacAddress(byte mac[6]);
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static bool isPWMPin(byte pin);
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static void setPWM(byte pin, bool high);
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#if (defined(TEENSYDUINO) && !defined(__IMXRT1062__))
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static void read_mac(byte mac[6]);
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static void read(uint8_t word, uint8_t *mac, uint8_t offset);
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#endif
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private:
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// Update low ram level. Allow for extra bytes to be specified
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// by estimation or inspection, that may be used by other
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// called subroutines. Must be called with interrupts disabled.
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//
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// Although __brkval may go up and down as heap memory is allocated
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// and freed, this function records only the worst case encountered.
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// So even if all of the heap is freed, the reported minimum free
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// memory will not increase.
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//
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static void inline updateMinimumFreeMemoryISR(unsigned char extraBytes=0) {
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int spare = freeMemory()-extraBytes;
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if (spare < 0) spare = 0;
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if (spare < minimum_free_memory) minimum_free_memory = spare;
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}
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static int getMinimumFreeMemory();
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private:
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static int freeMemory();
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static volatile int minimum_free_memory;
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static const int DCC_SIGNAL_TIME=58; // this is the 58uS DCC 1-bit waveform half-cycle
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static const long CLOCK_CYCLES=(F_CPU / 1000000 * DCC_SIGNAL_TIME) >>1;
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};
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#endif
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113
DCCTimerAVR.cpp
Normal file
113
DCCTimerAVR.cpp
Normal file
@ -0,0 +1,113 @@
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/*
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* © 2021 Mike S
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* © 2021 Harald Barth
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* © 2021 Fred Decker
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* © 2021 Chris Harlow
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* © 2021 David Cutting
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* All rights reserved.
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*
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* This file is part of Asbelos DCC API
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*
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* This 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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* It 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 CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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// ATTENTION: this file only compiles on a UNO or MEGA
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// Please refer to DCCTimer.h for general comments about how this class works
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// This is to avoid repetition and duplication.
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#ifdef ARDUINO_ARCH_AVR
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#include <avr/boot.h>
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#include "DCCTimer.h"
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INTERRUPT_CALLBACK interruptHandler=0;
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// Arduino nano, uno, mega etc
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#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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#define TIMER1_A_PIN 11
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#define TIMER1_B_PIN 12
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#define TIMER1_C_PIN 13
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#else
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#define TIMER1_A_PIN 9
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#define TIMER1_B_PIN 10
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#endif
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void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
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interruptHandler=callback;
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noInterrupts();
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ADCSRA = (ADCSRA & 0b11111000) | 0b00000100; // speed up analogRead sample time
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TCCR1A = 0;
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ICR1 = CLOCK_CYCLES;
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TCNT1 = 0;
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TCCR1B = _BV(WGM13) | _BV(CS10); // Mode 8, clock select 1
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TIMSK1 = _BV(TOIE1); // Enable Software interrupt
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interrupts();
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}
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// ISR called by timer interrupt every 58uS
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ISR(TIMER1_OVF_vect){ interruptHandler(); }
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// Alternative pin manipulation via PWM control.
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bool DCCTimer::isPWMPin(byte pin) {
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return pin==TIMER1_A_PIN
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|| pin==TIMER1_B_PIN
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#ifdef TIMER1_C_PIN
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|| pin==TIMER1_C_PIN
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#endif
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;
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}
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void DCCTimer::setPWM(byte pin, bool high) {
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if (pin==TIMER1_A_PIN) {
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TCCR1A |= _BV(COM1A1);
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OCR1A= high?1024:0;
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}
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else if (pin==TIMER1_B_PIN) {
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TCCR1A |= _BV(COM1B1);
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OCR1B= high?1024:0;
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}
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#ifdef TIMER1_C_PIN
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else if (pin==TIMER1_C_PIN) {
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TCCR1A |= _BV(COM1C1);
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OCR1C= high?1024:0;
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}
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#endif
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}
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void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
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for (byte i=0; i<6; i++) {
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mac[i]=boot_signature_byte_get(0x0E + i);
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}
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mac[0] &= 0xFE;
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mac[0] |= 0x02;
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}
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volatile int DCCTimer::minimum_free_memory=__INT_MAX__;
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// Return low memory value...
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int DCCTimer::getMinimumFreeMemory() {
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noInterrupts(); // Disable interrupts to get volatile value
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int retval = minimum_free_memory;
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interrupts();
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return retval;
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}
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extern char *__brkval;
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extern char *__malloc_heap_start;
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int DCCTimer::freeMemory() {
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char top;
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return __brkval ? &top - __brkval : &top - __malloc_heap_start;
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}
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#endif
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@ -47,14 +47,17 @@
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*
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*/
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// ATTENTION: this file only compiles on a UnoWifiRev3 or NanoEvery
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// Please refer to DCCTimer.h for general comments about how this class works
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// This is to avoid repetition and duplication.
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#ifdef ARDUINO_ARCH_MEGAAVR
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#include "DCCTimer.h"
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const int DCC_SIGNAL_TIME=58; // this is the 58uS DCC 1-bit waveform half-cycle
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const long CLOCK_CYCLES=(F_CPU / 1000000 * DCC_SIGNAL_TIME) >>1;
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INTERRUPT_CALLBACK interruptHandler=0;
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extern char *__brkval;
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extern char *__malloc_heap_start;
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#ifdef ARDUINO_ARCH_MEGAAVR
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// Arduino unoWifi Rev2 and nanoEvery architectire
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void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
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interruptHandler=callback;
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@ -93,126 +96,9 @@ INTERRUPT_CALLBACK interruptHandler=0;
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mac[0] |= 0x02;
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}
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#elif defined(TEENSYDUINO)
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IntervalTimer myDCCTimer;
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void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
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interruptHandler=callback;
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myDCCTimer.begin(interruptHandler, DCC_SIGNAL_TIME);
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}
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bool DCCTimer::isPWMPin(byte pin) {
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//Teensy: digitalPinHasPWM, todo
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(void) pin;
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return false; // TODO what are the relevant pins?
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}
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void DCCTimer::setPWM(byte pin, bool high) {
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// TODO what are the relevant pins?
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(void) pin;
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(void) high;
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int DCCTimer::freeMemory() {
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char top;
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return __brkval ? &top - __brkval : &top - __malloc_heap_start;
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}
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void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
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#if defined(__IMXRT1062__) //Teensy 4.0 and Teensy 4.1
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uint32_t m1 = HW_OCOTP_MAC1;
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uint32_t m2 = HW_OCOTP_MAC0;
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mac[0] = m1 >> 8;
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mac[1] = m1 >> 0;
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mac[2] = m2 >> 24;
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mac[3] = m2 >> 16;
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mac[4] = m2 >> 8;
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mac[5] = m2 >> 0;
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#else
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read_mac(mac);
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#endif
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}
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#if !defined(__IMXRT1062__)
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void DCCTimer::read_mac(byte mac[6]) {
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read(0xe,mac,0);
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read(0xf,mac,3);
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}
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// http://forum.pjrc.com/threads/91-teensy-3-MAC-address
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void DCCTimer::read(uint8_t word, uint8_t *mac, uint8_t offset) {
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FTFL_FCCOB0 = 0x41; // Selects the READONCE command
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FTFL_FCCOB1 = word; // read the given word of read once area
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// launch command and wait until complete
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FTFL_FSTAT = FTFL_FSTAT_CCIF;
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while(!(FTFL_FSTAT & FTFL_FSTAT_CCIF));
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*(mac+offset) = FTFL_FCCOB5; // collect only the top three bytes,
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*(mac+offset+1) = FTFL_FCCOB6; // in the right orientation (big endian).
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*(mac+offset+2) = FTFL_FCCOB7; // Skip FTFL_FCCOB4 as it's always 0.
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}
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#endif
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#else
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// Arduino nano, uno, mega etc
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#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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#define TIMER1_A_PIN 11
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#define TIMER1_B_PIN 12
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#define TIMER1_C_PIN 13
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#else
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#define TIMER1_A_PIN 9
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#define TIMER1_B_PIN 10
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#endif
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void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
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interruptHandler=callback;
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noInterrupts();
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ADCSRA = (ADCSRA & 0b11111000) | 0b00000100; // speed up analogRead sample time
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TCCR1A = 0;
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ICR1 = CLOCK_CYCLES;
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TCNT1 = 0;
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TCCR1B = _BV(WGM13) | _BV(CS10); // Mode 8, clock select 1
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TIMSK1 = _BV(TOIE1); // Enable Software interrupt
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interrupts();
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}
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// ISR called by timer interrupt every 58uS
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ISR(TIMER1_OVF_vect){ interruptHandler(); }
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// Alternative pin manipulation via PWM control.
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bool DCCTimer::isPWMPin(byte pin) {
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return pin==TIMER1_A_PIN
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|| pin==TIMER1_B_PIN
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#ifdef TIMER1_C_PIN
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|| pin==TIMER1_C_PIN
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#endif
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;
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}
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void DCCTimer::setPWM(byte pin, bool high) {
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if (pin==TIMER1_A_PIN) {
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TCCR1A |= _BV(COM1A1);
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OCR1A= high?1024:0;
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}
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else if (pin==TIMER1_B_PIN) {
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TCCR1A |= _BV(COM1B1);
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OCR1B= high?1024:0;
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}
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#ifdef TIMER1_C_PIN
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else if (pin==TIMER1_C_PIN) {
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TCCR1A |= _BV(COM1C1);
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OCR1C= high?1024:0;
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}
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#endif
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}
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#include <avr/boot.h>
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void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
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for (byte i=0; i<6; i++) {
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mac[i]=boot_signature_byte_get(0x0E + i);
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}
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mac[0] &= 0xFE;
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mac[0] |= 0x02;
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}
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#endif
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122
DCCTimerTEENSY.cpp
Normal file
122
DCCTimerTEENSY.cpp
Normal file
@ -0,0 +1,122 @@
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/*
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* © 2021 Mike S
|
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* © 2021 Harald Barth
|
||||
* © 2021 Fred Decker
|
||||
* © 2021 Chris Harlow
|
||||
* © 2021 David Cutting
|
||||
* All rights reserved.
|
||||
*
|
||||
* This file is part of Asbelos DCC API
|
||||
*
|
||||
* This 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.
|
||||
*
|
||||
* It 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/>.
|
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*/
|
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// ATTENTION: this file only compiles on a TEENSY
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// Please refer to DCCTimer.h for general comments about how this class works
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// This is to avoid repetition and duplication.
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#ifdef TEENSYDUINO
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#include "DCCTimer.h"
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INTERRUPT_CALLBACK interruptHandler=0;
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IntervalTimer myDCCTimer;
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void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
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interruptHandler=callback;
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myDCCTimer.begin(interruptHandler, DCC_SIGNAL_TIME);
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}
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bool DCCTimer::isPWMPin(byte pin) {
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//Teensy: digitalPinHasPWM, todo
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(void) pin;
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return false; // TODO what are the relevant pins?
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}
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void DCCTimer::setPWM(byte pin, bool high) {
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// TODO what are the relevant pins?
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(void) pin;
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(void) high;
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}
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#if defined(__IMXRT1062__) //Teensy 4.0 and Teensy 4.1
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void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
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uint32_t m1 = HW_OCOTP_MAC1;
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uint32_t m2 = HW_OCOTP_MAC0;
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mac[0] = m1 >> 8;
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mac[1] = m1 >> 0;
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mac[2] = m2 >> 24;
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mac[3] = m2 >> 16;
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mac[4] = m2 >> 8;
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mac[5] = m2 >> 0;
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}
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#else
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// http://forum.pjrc.com/threads/91-teensy-3-MAC-address
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void teensyRead(uint8_t word, uint8_t *mac, uint8_t offset) {
|
||||
FTFL_FCCOB0 = 0x41; // Selects the READONCE command
|
||||
FTFL_FCCOB1 = word; // read the given word of read once area
|
||||
|
||||
// launch command and wait until complete
|
||||
FTFL_FSTAT = FTFL_FSTAT_CCIF;
|
||||
while(!(FTFL_FSTAT & FTFL_FSTAT_CCIF));
|
||||
|
||||
*(mac+offset) = FTFL_FCCOB5; // collect only the top three bytes,
|
||||
*(mac+offset+1) = FTFL_FCCOB6; // in the right orientation (big endian).
|
||||
*(mac+offset+2) = FTFL_FCCOB7; // Skip FTFL_FCCOB4 as it's always 0.
|
||||
}
|
||||
|
||||
void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
|
||||
teensyRead(0xe,mac,0);
|
||||
teensyRead(0xf,mac,3);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if !defined(__IMXRT1062__)
|
||||
static inline int freeMemory() {
|
||||
char top;
|
||||
return &top - reinterpret_cast<char*>(sbrk(0));
|
||||
}
|
||||
|
||||
#else
|
||||
#if defined(ARDUINO_TEENSY40)
|
||||
static const unsigned DTCM_START = 0x20000000UL;
|
||||
static const unsigned OCRAM_START = 0x20200000UL;
|
||||
static const unsigned OCRAM_SIZE = 512;
|
||||
static const unsigned FLASH_SIZE = 1984;
|
||||
#elif defined(ARDUINO_TEENSY41)
|
||||
static const unsigned DTCM_START = 0x20000000UL;
|
||||
static const unsigned OCRAM_START = 0x20200000UL;
|
||||
static const unsigned OCRAM_SIZE = 512;
|
||||
static const unsigned FLASH_SIZE = 7936;
|
||||
#if TEENSYDUINO>151
|
||||
extern "C" uint8_t external_psram_size;
|
||||
#endif
|
||||
#endif
|
||||
|
||||
static inline int freeMemory() {
|
||||
extern unsigned long _ebss;
|
||||
extern unsigned long _sdata;
|
||||
extern unsigned long _estack;
|
||||
const unsigned DTCM_START = 0x20000000UL;
|
||||
unsigned dtcm = (unsigned)&_estack - DTCM_START;
|
||||
unsigned stackinuse = (unsigned) &_estack - (unsigned) __builtin_frame_address(0);
|
||||
unsigned varsinuse = (unsigned)&_ebss - (unsigned)&_sdata;
|
||||
unsigned freemem = dtcm - (stackinuse + varsinuse);
|
||||
return freemem;
|
||||
}
|
||||
|
||||
#endif
|
||||
#endif
|
||||
@ -29,7 +29,7 @@
|
||||
#include "DCCTimer.h"
|
||||
#include "DCCACK.h"
|
||||
#include "DIAG.h"
|
||||
#include "freeMemory.h"
|
||||
|
||||
|
||||
DCCWaveform DCCWaveform::mainTrack(PREAMBLE_BITS_MAIN, true);
|
||||
DCCWaveform DCCWaveform::progTrack(PREAMBLE_BITS_PROG, false);
|
||||
@ -140,7 +140,7 @@ void DCCWaveform::interrupt2() {
|
||||
remainingPreambles--;
|
||||
// Update free memory diagnostic as we don't have anything else to do this time.
|
||||
// Allow for checkAck and its called functions using 22 bytes more.
|
||||
updateMinimumFreeMemory(22);
|
||||
DCCTimer::updateMinimumFreeMemoryISR(22);
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
@ -138,9 +138,6 @@ void MotorDriver::setSignal( bool high) {
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(ARDUINO_TEENSY32) || defined(ARDUINO_TEENSY35)|| defined(ARDUINO_TEENSY36)
|
||||
volatile unsigned int overflow_count=0;
|
||||
#endif
|
||||
|
||||
bool MotorDriver::canMeasureCurrent() {
|
||||
return currentPin!=UNUSED_PIN;
|
||||
|
||||
@ -46,8 +46,7 @@ byte TrackManager::lastTrack=0;
|
||||
void TrackManager::Setup(const FSH * shieldname,
|
||||
MotorDriver * track0, MotorDriver * track1, MotorDriver * track2,
|
||||
MotorDriver * track3, MotorDriver * track4, MotorDriver * track5,
|
||||
MotorDriver * track6, MotorDriver * track7 ) {
|
||||
(void) shieldname; // TODO
|
||||
MotorDriver * track6, MotorDriver * track7 ) {
|
||||
addTrack(0,track0);
|
||||
addTrack(1,track1);
|
||||
addTrack(2,track2);
|
||||
|
||||
112
freeMemory.cpp
112
freeMemory.cpp
@ -1,112 +0,0 @@
|
||||
/*
|
||||
* © 2021 Neil McKechnie
|
||||
* © 2021 Mike S
|
||||
* © 2020 Harald Barth
|
||||
*
|
||||
* This file is part of Asbelos DCC-EX
|
||||
*
|
||||
* This 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.
|
||||
*
|
||||
* It 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/>.
|
||||
*/
|
||||
|
||||
#include <Arduino.h>
|
||||
#include "freeMemory.h"
|
||||
|
||||
// thanks go to https://github.com/mpflaga/Arduino-MemoryFree
|
||||
#if defined(__arm__)
|
||||
extern "C" char* sbrk(int);
|
||||
#elif defined(__AVR__)
|
||||
extern char *__brkval;
|
||||
extern char *__malloc_heap_start;
|
||||
#else
|
||||
#error Unsupported board type
|
||||
#endif
|
||||
|
||||
|
||||
static volatile int minimum_free_memory = __INT_MAX__;
|
||||
|
||||
#if !defined(__IMXRT1062__)
|
||||
static inline int freeMemory() {
|
||||
char top;
|
||||
#if defined(__arm__)
|
||||
return &top - reinterpret_cast<char*>(sbrk(0));
|
||||
#elif defined(__AVR__)
|
||||
return __brkval ? &top - __brkval : &top - __malloc_heap_start;
|
||||
#else
|
||||
#error bailed out already above
|
||||
#endif
|
||||
}
|
||||
|
||||
// Return low memory value.
|
||||
int minimumFreeMemory() {
|
||||
byte sreg_save = SREG;
|
||||
noInterrupts(); // Disable interrupts
|
||||
int retval = minimum_free_memory;
|
||||
SREG = sreg_save; // Restore interrupt state
|
||||
return retval;
|
||||
}
|
||||
|
||||
#else
|
||||
#if defined(ARDUINO_TEENSY40)
|
||||
static const unsigned DTCM_START = 0x20000000UL;
|
||||
static const unsigned OCRAM_START = 0x20200000UL;
|
||||
static const unsigned OCRAM_SIZE = 512;
|
||||
static const unsigned FLASH_SIZE = 1984;
|
||||
#elif defined(ARDUINO_TEENSY41)
|
||||
static const unsigned DTCM_START = 0x20000000UL;
|
||||
static const unsigned OCRAM_START = 0x20200000UL;
|
||||
static const unsigned OCRAM_SIZE = 512;
|
||||
static const unsigned FLASH_SIZE = 7936;
|
||||
#if TEENSYDUINO>151
|
||||
extern "C" uint8_t external_psram_size;
|
||||
#endif
|
||||
#endif
|
||||
|
||||
static inline int freeMemory() {
|
||||
extern unsigned long _ebss;
|
||||
extern unsigned long _sdata;
|
||||
extern unsigned long _estack;
|
||||
const unsigned DTCM_START = 0x20000000UL;
|
||||
unsigned dtcm = (unsigned)&_estack - DTCM_START;
|
||||
unsigned stackinuse = (unsigned) &_estack - (unsigned) __builtin_frame_address(0);
|
||||
unsigned varsinuse = (unsigned)&_ebss - (unsigned)&_sdata;
|
||||
unsigned freemem = dtcm - (stackinuse + varsinuse);
|
||||
return freemem;
|
||||
}
|
||||
|
||||
// Return low memory value.
|
||||
int minimumFreeMemory() {
|
||||
//byte sreg_save = SREG;
|
||||
//noInterrupts(); // Disable interrupts
|
||||
int retval = minimum_free_memory;
|
||||
//SREG = sreg_save; // Restore interrupt state
|
||||
return retval;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
// Update low ram level. Allow for extra bytes to be specified
|
||||
// by estimation or inspection, that may be used by other
|
||||
// called subroutines. Must be called with interrupts disabled.
|
||||
//
|
||||
// Although __brkval may go up and down as heap memory is allocated
|
||||
// and freed, this function records only the worst case encountered.
|
||||
// So even if all of the heap is freed, the reported minimum free
|
||||
// memory will not increase.
|
||||
//
|
||||
void updateMinimumFreeMemory(unsigned char extraBytes) {
|
||||
int spare = freeMemory()-extraBytes;
|
||||
if (spare < 0) spare = 0;
|
||||
if (spare < minimum_free_memory) minimum_free_memory = spare;
|
||||
}
|
||||
|
||||
25
freeMemory.h
25
freeMemory.h
@ -1,25 +0,0 @@
|
||||
/*
|
||||
* © 2021 Neil McKechnie
|
||||
* © 2020 Harald Barth
|
||||
*
|
||||
* This file is part of DCC-EX
|
||||
*
|
||||
* This 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.
|
||||
*
|
||||
* It 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 freeMemory_h
|
||||
#define freeMemory_h
|
||||
void updateMinimumFreeMemory(unsigned char extraBytes=0);
|
||||
int minimumFreeMemory();
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user