Fork of Smoothie to port to mbed non-LPC targets.
Fork of Smoothie by
libs/SlowTicker.cpp
- Committer:
- scachat
- Date:
- 2012-07-31
- Revision:
- 0:31e91bb0ef3c
- Child:
- 2:1df0b61d3b5a
File content as of revision 0:31e91bb0ef3c:
/* This file is part of Smoothie (http://smoothieware.org/). The motion control part is heavily based on Grbl (https://github.com/simen/grbl). 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. 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. You should have received a copy of the GNU General Public License along with Smoothie. If not, see <http://www.gnu.org/licenses/>. */ using namespace std; #include <vector> #include "libs/nuts_bolts.h" #include "libs/Module.h" #include "libs/Kernel.h" #include "SlowTicker.h" #include "libs/Hook.h" #include "system_LPC17xx.h" // mbed.h lib SlowTicker* global_slow_ticker; SlowTicker::SlowTicker(){ this->max_frequency = 1; global_slow_ticker = this; LPC_SC->PCONP |= (1 << 22); // Power Ticker ON LPC_TIM2->MR0 = 10000; // Initial dummy value for Match Register LPC_TIM2->MCR = 3; // Match on MR0, reset on MR0 LPC_TIM2->TCR = 1; // Enable interrupt NVIC_EnableIRQ(TIMER2_IRQn); // Enable interrupt handler } void SlowTicker::set_frequency( int frequency ){ LPC_TIM2->MR0 = (SystemCoreClock/4)/frequency; // SystemCoreClock/4 = Timer increments in a second LPC_TIM2->TCR = 3; // Reset LPC_TIM2->TCR = 1; // Reset } void SlowTicker::tick(){ for (int i=0; i<this->hooks.size(); i++){ Hook* hook = this->hooks.at(i); hook->counter += ( hook->frequency / this->max_frequency ); if( hook->counter > 0 ){ hook->counter-=1; hook->call(); } } } extern "C" void TIMER2_IRQHandler (void){ if((LPC_TIM2->IR >> 0) & 1){ // If interrupt register set for MR0 LPC_TIM2->IR |= 1 << 0; // Reset it global_slow_ticker->tick(); } }