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df27a6a3 | 1 | /* |
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2 | This file is part of Smoothie (http://smoothieware.org/). The motion control part is heavily based on Grbl (https://github.com/simen/grbl). |
3 | Smoothie 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. | |
4 | Smoothie 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. | |
df27a6a3 | 5 | You should have received a copy of the GNU General Public License along with Smoothie. If not, see <http://www.gnu.org/licenses/>. |
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6 | */ |
7 | ||
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8 | using namespace std; |
9 | #include <vector> | |
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10 | #include "libs/nuts_bolts.h" |
11 | #include "libs/Module.h" | |
12 | #include "libs/Kernel.h" | |
13 | #include "SlowTicker.h" | |
d9ebc974 | 14 | #include "libs/Hook.h" |
da3a10b9 | 15 | #include "system_LPC17xx.h" // mbed.h lib |
ded56b35 | 16 | |
65fe0408 | 17 | #include <mri.h> |
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18 | |
19 | SlowTicker* global_slow_ticker; | |
20 | ||
21 | SlowTicker::SlowTicker(){ | |
d9ebc974 | 22 | this->max_frequency = 1; |
ded56b35 | 23 | global_slow_ticker = this; |
7dd8133c | 24 | LPC_SC->PCONP |= (1 << 22); // Power Ticker ON |
d9ebc974 | 25 | LPC_TIM2->MR0 = 10000; // Initial dummy value for Match Register |
7dd8133c AW |
26 | LPC_TIM2->MCR = 3; // Match on MR0, reset on MR0 |
27 | LPC_TIM2->TCR = 1; // Enable interrupt | |
28 | NVIC_EnableIRQ(TIMER2_IRQn); // Enable interrupt handler | |
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29 | |
30 | ispbtn.from_string("2.10")->as_input()->pull_up(); | |
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31 | } |
32 | ||
33 | void SlowTicker::set_frequency( int frequency ){ | |
7b49793d | 34 | LPC_TIM2->MR0 = int(floor((SystemCoreClock/4)/frequency)); // SystemCoreClock/4 = Timer increments in a second |
7dd8133c AW |
35 | LPC_TIM2->TCR = 3; // Reset |
36 | LPC_TIM2->TCR = 1; // Reset | |
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37 | } |
38 | ||
39 | void SlowTicker::tick(){ | |
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40 | |
41 | LPC_GPIO1->FIODIR |= 1<<20; | |
42 | LPC_GPIO1->FIOSET = 1<<20; | |
43 | ||
df27a6a3 | 44 | for (unsigned int i=0; i<this->hooks.size(); i++){ |
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45 | Hook* hook = this->hooks.at(i); |
46 | hook->counter += ( hook->frequency / this->max_frequency ); | |
d9ebc974 AW |
47 | if( hook->counter > 0 ){ |
48 | hook->counter-=1; | |
d9ebc974 | 49 | hook->call(); |
df27a6a3 | 50 | } |
ded56b35 | 51 | } |
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52 | |
53 | LPC_GPIO1->FIOCLR = 1<<20; | |
54 | ||
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55 | if (ispbtn.get() == 0) |
56 | __debugbreak(); | |
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57 | } |
58 | ||
59 | extern "C" void TIMER2_IRQHandler (void){ | |
7dd8133c | 60 | if((LPC_TIM2->IR >> 0) & 1){ // If interrupt register set for MR0 |
df27a6a3 | 61 | LPC_TIM2->IR |= 1 << 0; // Reset it |
ded56b35 | 62 | } |
df27a6a3 | 63 | global_slow_ticker->tick(); |
ded56b35 AW |
64 | } |
65 |