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[example] Add small example using RCR register
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/* | ||
* Copyright (c) 2023, Zühlke (Austria) gmbh | ||
* | ||
* This file is part of the modm project. | ||
* | ||
* This Source Code Form is subject to the terms of the Mozilla Public | ||
* License, v. 2.0. If a copy of the MPL was not distributed with this | ||
* file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
*/ | ||
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// The Repetition count register combined with one pulse mode is a great | ||
// tool to enable the timer to produce a limited amount of pulses in PWM | ||
// mode. In this example Timer1 is configured to produce 50 PWM pulses | ||
// with 90% of duty cycle. | ||
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#include <modm/architecture/interface/interrupt.hpp> | ||
#include <modm/board.hpp> | ||
#include <modm/platform.hpp> | ||
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using namespace Board; | ||
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volatile uint32_t counter(0); | ||
constexpr uint32_t number_of_pulses = 50; | ||
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template<class Timer> | ||
void | ||
advancedTimerConfig() | ||
{ | ||
Timer::enable(); | ||
Timer::setMode(Timer::Mode::UpCounter, Timer::SlaveMode::Disabled, | ||
Timer::SlaveModeTrigger::Internal0, Timer::MasterMode::Update, true); | ||
Timer::setPrescaler(84); | ||
Timer::setOverflow(9999); | ||
Timer::enableInterruptVector(Timer::Interrupt::CaptureCompare1, true, 0); | ||
Timer::enableInterrupt(Timer::Interrupt::CaptureCompare1); | ||
Timer::setRepetitionCount(number_of_pulses - 1); | ||
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Timer::enableOutput(); | ||
Timer::configureOutputChannel(1, Timer::OutputCompareMode::Pwm, 999, Timer::PinState::Enable); | ||
} | ||
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template<class Timer> | ||
void | ||
timerStart() | ||
{ | ||
Timer::applyAndReset(); | ||
Timer::start(); | ||
} | ||
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MODM_ISR(TIM1_CC) | ||
{ | ||
modm::platform::Timer1::acknowledgeInterruptFlags( | ||
modm::platform::Timer1::InterruptFlag::CaptureCompare1); | ||
LedD13::toggle(); | ||
counter++; | ||
} | ||
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int | ||
main() | ||
{ | ||
Board::initialize(); | ||
LedD13::setOutput(); | ||
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// Use the logging streams to print some messages. | ||
// Change MODM_LOG_LEVEL above to enable or disable these messages | ||
MODM_LOG_DEBUG << "debug" << modm::endl; | ||
MODM_LOG_INFO << "info" << modm::endl; | ||
MODM_LOG_WARNING << "warning" << modm::endl; | ||
MODM_LOG_ERROR << "error" << modm::endl; | ||
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advancedTimerConfig<Timer1>(); | ||
timerStart<Timer1>(); | ||
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while (true) | ||
{ | ||
MODM_LOG_DEBUG << "Timer 1 pulsed " << static_cast<uint8_t>(counter) << "times\r" | ||
<< modm::endl; | ||
modm::delay(0.5s); | ||
} | ||
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return 0; | ||
} |
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<library> | ||
<extends>modm:nucleo-f401re</extends> | ||
<options> | ||
<option name="modm:build:build.path">../../../build/nucleo_f401re/timer_register_count</option> | ||
</options> | ||
<modules> | ||
<module>modm:build:scons</module> | ||
<module>modm:platform:timer:1</module> | ||
</modules> | ||
</library> |