-
-
Notifications
You must be signed in to change notification settings - Fork 107
/
DCCTimerTEENSY.cpp
171 lines (147 loc) · 4.61 KB
/
DCCTimerTEENSY.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
/*
* © 2022 Paul M Antoine
* © 2021 Mike S
* © 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/>.
*/
// ATTENTION: this file only compiles on a TEENSY
// Please refer to DCCTimer.h for general comments about how this class works
// This is to avoid repetition and duplication.
#ifdef TEENSYDUINO
#include "DCCTimer.h"
INTERRUPT_CALLBACK interruptHandler=0;
IntervalTimer myDCCTimer;
void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
interruptHandler=callback;
myDCCTimer.begin(interruptHandler, DCC_SIGNAL_TIME);
}
bool DCCTimer::isPWMPin(byte pin) {
//Teensy: digitalPinHasPWM, todo
(void) pin;
return false; // TODO what are the relevant pins?
}
void DCCTimer::setPWM(byte pin, bool high) {
// TODO what are the relevant pins?
(void) pin;
(void) high;
}
void DCCTimer::clearPWM() {
// Do nothing unless we implent HA
}
#if defined(__IMXRT1062__) //Teensy 4.0 and Teensy 4.1
void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
uint32_t m1 = HW_OCOTP_MAC1;
uint32_t m2 = HW_OCOTP_MAC0;
mac[0] = m1 >> 8;
mac[1] = m1 >> 0;
mac[2] = m2 >> 24;
mac[3] = m2 >> 16;
mac[4] = m2 >> 8;
mac[5] = m2 >> 0;
}
#else
// http://forum.pjrc.com/threads/91-teensy-3-MAC-address
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
volatile int DCCTimer::minimum_free_memory=__INT_MAX__;
// Return low memory value...
int DCCTimer::getMinimumFreeMemory() {
noInterrupts(); // Disable interrupts to get volatile value
int retval = freeMemory();
interrupts();
return retval;
}
extern "C" char* sbrk(int incr);
#if !defined(__IMXRT1062__)
int DCCTimer::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
int DCCTimer::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
void DCCTimer::reset() {
// found at https://forum.pjrc.com/threads/59935-Reboot-Teensy-programmatically
SCB_AIRCR = 0x05FA0004;
}
int16_t ADCee::ADCmax() {
return 4095;
}
int ADCee::init(uint8_t pin) {
return analogRead(pin);
}
/*
* Read function ADCee::read(pin) to get value instead of analogRead(pin)
*/
int ADCee::read(uint8_t pin, bool fromISR) {
int current;
if (!fromISR) noInterrupts();
current = analogRead(pin);
if (!fromISR) interrupts();
return current;
}
/*
* Scan function that is called from interrupt
*/
void ADCee::scan() {
}
void ADCee::begin() {
noInterrupts();
interrupts();
}
#endif