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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.
* ****************************************************************************/
/**
* @brief wirish timer class to manage the four 16-bit timer peripherals
*
* This implementation is not very efficient (lots of duplicated functions)
*/
#include "wirish.h"
#include "HardwareTimer.h"
HardwareTimer::HardwareTimer(uint8 timerNum) {
ASSERT(timerNum < NR_TIMERS);
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);
}
// This function will set the prescaler and overflow to get
// a period of the given length with the most resolution;
// the return value is the overflow value and thus the largest
// value that can be set as a compare.
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);
// Find this overflow will always be less than 65536
setOverflow((microseconds*72)/ps);
return this->overflow;
}
void HardwareTimer::setChannel1Mode(uint8 mode) {
timer_set_mode(this->timerNum,1,mode);
}
void HardwareTimer::setChannel2Mode(uint8 mode) {
timer_set_mode(this->timerNum,2,mode);
}
void HardwareTimer::setChannel3Mode(uint8 mode) {
timer_set_mode(this->timerNum,3,mode);
}
void HardwareTimer::setChannel4Mode(uint8 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) {
ASSERT(this->timerNum);
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);
}
#if NR_TIMERS >= 8
void HardwareTimer::setChannel5Mode(uint8 mode) {
timer_set_mode(this->timerNum,5,mode);
}
void HardwareTimer::setChannel8Mode(uint8 mode) {
timer_set_mode(this->timerNum,8,mode);
}
void HardwareTimer::setCompare5(uint16 val) {
if(val > this->overflow)
val = this->overflow;
timer_set_compare_value(this->timerNum,5,val);
}
void HardwareTimer::setCompare8(uint16 val) {
if(val > this->overflow)
val = this->overflow;
timer_set_compare_value(this->timerNum,8,val);
}
void HardwareTimer::attachCompare5Interrupt(voidFuncPtr handler) {
timer_attach_interrupt(this->timerNum,5,handler);
}
void HardwareTimer::attachCompare8Interrupt(voidFuncPtr handler) {
timer_attach_interrupt(this->timerNum,8,handler);
}
void HardwareTimer::detachCompare5Interrupt(void) {
timer_detach_interrupt(this->timerNum,5);
}
void HardwareTimer::detachCompare8Interrupt(void) {
timer_detach_interrupt(this->timerNum,8);
}
#endif
HardwareTimer Timer1(1);
HardwareTimer Timer2(2);
HardwareTimer Timer3(3);
HardwareTimer Timer4(4);
#if NR_TIMERS >= 8
HardwareTimer Timer5(5); // High-density devices only
HardwareTimer Timer8(8); // High-density devices only
#endif
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