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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Bryan Newbold.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*****************************************************************************/
/*
* wirish timer class to manage the four 16-bit timer peripherals
*/
#include "wirish.h"
#include "HardwareTimer.h"
HardwareTimer::HardwareTimer(uint8 timerNum) {
ASSERT(timerNum <= NR_TIMERS && timerNum != 6 && timerNum != 7);
this->timerNum = timerNum;
// Need to remember over flow for bounds checking
this->overflow = 0xFFFF;
}
void HardwareTimer::resume(void) {
timer_resume(this->timerNum);
}
void HardwareTimer::pause(void) {
timer_pause(this->timerNum);
}
void HardwareTimer::setPrescaleFactor(uint16 factor) {
// The prescaler register is zero-indexed
timer_set_prescaler(this->timerNum, factor-1);
}
void HardwareTimer::setOverflow(uint16 val) {
this->overflow = val;
timer_set_reload(this->timerNum, val);
}
void HardwareTimer::setCount(uint16 val) {
if(val > this->overflow) {
val = this->overflow;
}
timer_set_count(this->timerNum, val);
}
uint16 HardwareTimer::getCount(void) {
return timer_get_count(this->timerNum);
}
uint16 HardwareTimer::setPeriod(uint32 microseconds) {
// XXX: 72MHz shouldn't be hard coded in here... global define?
// Not the best way to handle this edge case?
if(!microseconds) {
setPrescaleFactor(1);
setOverflow(1);
return this->overflow;
}
// With a prescale factor of 1, there are 72counts/ms
uint16 ps = ((microseconds*72)/65536) + 1;
setPrescaleFactor(ps);
// Finally, this overflow will always be less than 65536
setOverflow(((microseconds*72)/ps) - 1);
return this->overflow;
}
void HardwareTimer::setChannel1Mode(TimerMode mode) {
timer_set_mode(this->timerNum,1,mode);
}
void HardwareTimer::setChannel2Mode(TimerMode mode) {
timer_set_mode(this->timerNum,2,mode);
}
void HardwareTimer::setChannel3Mode(TimerMode mode) {
timer_set_mode(this->timerNum,3,mode);
}
void HardwareTimer::setChannel4Mode(TimerMode mode) {
timer_set_mode(this->timerNum,4,mode);
}
void HardwareTimer::setCompare1(uint16 val) {
if(val > this->overflow) {
val = this->overflow;
}
timer_set_compare_value(this->timerNum,1,val);
}
void HardwareTimer::setCompare2(uint16 val) {
if(val > this->overflow) {
val = this->overflow;
}
timer_set_compare_value(this->timerNum,2,val);
}
void HardwareTimer::setCompare3(uint16 val) {
if(val > this->overflow) {
val = this->overflow;
}
timer_set_compare_value(this->timerNum,3,val);
}
void HardwareTimer::setCompare4(uint16 val) {
if(val > this->overflow) {
val = this->overflow;
}
timer_set_compare_value(this->timerNum,4,val);
}
void HardwareTimer::attachCompare1Interrupt(voidFuncPtr handler) {
timer_attach_interrupt(this->timerNum,1,handler);
}
void HardwareTimer::attachCompare2Interrupt(voidFuncPtr handler) {
timer_attach_interrupt(this->timerNum,2,handler);
}
void HardwareTimer::attachCompare3Interrupt(voidFuncPtr handler) {
timer_attach_interrupt(this->timerNum,3,handler);
}
void HardwareTimer::attachCompare4Interrupt(voidFuncPtr handler) {
timer_attach_interrupt(this->timerNum,4,handler);
}
void HardwareTimer::detachCompare1Interrupt(void) {
timer_detach_interrupt(this->timerNum,1);
}
void HardwareTimer::detachCompare2Interrupt(void) {
timer_detach_interrupt(this->timerNum,2);
}
void HardwareTimer::detachCompare3Interrupt(void) {
timer_detach_interrupt(this->timerNum,3);
}
void HardwareTimer::detachCompare4Interrupt(void) {
timer_detach_interrupt(this->timerNum,4);
}
HardwareTimer Timer1(TIMER1);
HardwareTimer Timer2(TIMER2);
HardwareTimer Timer3(TIMER3);
HardwareTimer Timer4(TIMER4);
#if NR_TIMERS >= 8
HardwareTimer Timer5(TIMER5); // High-density devices only
HardwareTimer Timer8(TIMER8); // High-density devices only
#endif
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