forked from DCC-EX/CommandStation-EX
-
Notifications
You must be signed in to change notification settings - Fork 0
/
DCCTimerTEENSY.cpp
126 lines (108 loc) · 3.7 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
/*
* © 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
#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