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[examples] Add ADC with DMA example for STM32F0
Co-authored-by: Christopher Durand <christopher.durand@rwth-aachen.de>
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/* | ||
* Copyright (c) 2024, Zühlke Engineering (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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#ifndef EXAMPLE_ADCDMA_HPP | ||
#define EXAMPLE_ADCDMA_HPP | ||
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#include <modm/platform.hpp> | ||
#include <span> | ||
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template<class Adc, class DmaChannel> | ||
class AdcDma | ||
{ | ||
struct Dma | ||
{ | ||
using AdcChannel = | ||
typename DmaChannel::template RequestMapping<modm::platform::Peripheral::Adc1>::Channel; | ||
static constexpr modm::platform::DmaBase::Request AdcRequest = | ||
DmaChannel::template RequestMapping<modm::platform::Peripheral::Adc1>::Request; | ||
}; | ||
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public: | ||
/** | ||
* \brief initialize both adc and dma | ||
* @tparam SystemClock | ||
*/ | ||
template<class SystemClock> | ||
static void | ||
initialize(std::span<uint16_t> buffer, | ||
modm::platform::DmaBase::Priority priority = modm::platform::DmaBase::Priority::Low, | ||
modm::platform::DmaBase::CircularMode circularMode = | ||
modm::platform::DmaBase::CircularMode::Enabled, | ||
modm::platform::DmaBase::IrqHandler transferErrorCallback = nullptr, | ||
modm::platform::DmaBase::IrqHandler halfCompletedCallback = nullptr, | ||
modm::platform::DmaBase::IrqHandler completedCallback = nullptr) | ||
{ | ||
Dma::AdcChannel::configure( | ||
modm::platform::DmaBase::DataTransferDirection::PeripheralToMemory, | ||
modm::platform::DmaBase::MemoryDataSize::HalfWord, | ||
modm::platform::DmaBase::PeripheralDataSize::HalfWord, | ||
modm::platform::DmaBase::MemoryIncrementMode::Increment, | ||
modm::platform::DmaBase::PeripheralIncrementMode::Fixed, priority, circularMode); | ||
Dma::AdcChannel::setPeripheralAddress(Adc::getDataRegisterAddress()); | ||
Dma::AdcChannel::setDataLength(buffer.size()); | ||
Dma::AdcChannel::setMemoryAddress(reinterpret_cast<uintptr_t>(buffer.data())); | ||
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setTransferErrorCallback(transferErrorCallback); | ||
setHalfCompletedConversionCallback(halfCompletedCallback); | ||
setCompletedConversionCallback(completedCallback); | ||
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Dma::AdcChannel::template setPeripheralRequest<Dma::AdcRequest>(); | ||
Adc::setDmaMode(Adc::DmaMode::Disabled); | ||
} | ||
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static void | ||
startDma() | ||
{ | ||
Adc::setDmaMode(Adc::DmaMode::Circular); | ||
DmaChannel::start(); | ||
} | ||
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static void | ||
setTransferErrorCallback(modm::platform::DmaBase::IrqHandler transferErrorCallback) | ||
{ | ||
if (transferErrorCallback == nullptr) { return; } | ||
Dma::AdcChannel::enableInterruptVector(); | ||
Dma::AdcChannel::enableInterrupt(modm::platform::DmaBase::InterruptEnable::TransferError); | ||
Dma::AdcChannel::setTransferErrorIrqHandler(transferErrorCallback); | ||
} | ||
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static void | ||
setHalfCompletedConversionCallback(modm::platform::DmaBase::IrqHandler halfCompletedCallback) | ||
{ | ||
if (halfCompletedCallback == nullptr) { return; } | ||
Dma::AdcChannel::enableInterruptVector(); | ||
Dma::AdcChannel::enableInterrupt(modm::platform::DmaBase::InterruptEnable::HalfTransfer); | ||
Dma::AdcChannel::setHalfTransferCompleteIrqHandler(halfCompletedCallback); | ||
} | ||
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static void | ||
setCompletedConversionCallback(modm::platform::DmaBase::IrqHandler completedCallback) | ||
{ | ||
if (completedCallback == nullptr) { return; } | ||
Dma::AdcChannel::enableInterruptVector(); | ||
Dma::AdcChannel::enableInterrupt( | ||
modm::platform::DmaBase::InterruptEnable::TransferComplete); | ||
Dma::AdcChannel::setTransferCompleteIrqHandler(completedCallback); | ||
} | ||
}; | ||
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#endif // EXAMPLE_ADCDMA_HPP |
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/* | ||
* Copyright (c) 2024, Zühlke Engineering (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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// This Example uses adc to sample s channels 50 times every 0.5s and store the value | ||
// in a buffer via dma. The adc is set to be triggered by the Timer1 compare event and then to | ||
// sample both channels using scan mode. The compare event is triggered for a defined number of | ||
// times by configuring the Timer1 to use one pulse mode with an repetition count. For more | ||
// information on the timer please refer to the timer register count example. In this configuration, | ||
// the adc sampling process is started by the cpu but handled completely by peripherals clearing CPU | ||
// time for other tasks. | ||
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#include <modm/architecture/interface/interrupt.hpp> | ||
#include <modm/board.hpp> | ||
#include <modm/platform.hpp> | ||
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#include "adc_dma.hpp" | ||
#include "timer_handler.hpp" | ||
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using namespace Board; | ||
using namespace modm::platform; | ||
using Adc1Dma = AdcDma<Adc1, Dma1::Channel1>; | ||
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std::array<uint16_t, 100> adc_results{}; | ||
volatile bool dma_completed = false; | ||
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void | ||
completedCallback() | ||
{ | ||
LedD13::toggle(); | ||
dma_completed = true; | ||
} | ||
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int | ||
main() | ||
{ | ||
Board::initialize(); | ||
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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_INFO << "Start Setup" << modm::endl; | ||
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LedD13::setOutput(); | ||
LedD13::reset(); | ||
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Adc1::connect<GpioInputA0::In0>(); | ||
Adc1::connect<GpioInputA1::In1>(); | ||
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Adc1::setSampleTime(Adc1::SampleTime::Cycles3_5); | ||
Adc1::initialize<SystemClock, Adc1::ClockMode::Asynchronous>(); | ||
modm::delay(500ms); | ||
// On STM32G0 Event1 means TIM1's channel 4 capture and compare event. | ||
// Each controller has a different trigger mapping, check the reference | ||
// manual for more information on the trigger mapping of your controller. | ||
Adc1::enableRegularConversionExternalTrigger(Adc1::ExternalTriggerPolarity::RisingEdge, | ||
Adc1::RegularConversionExternalTrigger::Event1); | ||
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Adc1::setChannels(Adc1::channelSequenceFromPins<GpioInputA0, GpioInputA1>()); | ||
Dma1::enable(); | ||
Adc1Dma::initialize<SystemClock>(adc_results); | ||
Adc1Dma::setCompletedConversionCallback(completedCallback); | ||
Adc1Dma::startDma(); | ||
Adc1::startConversion(); | ||
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advancedTimerConfig<Timer1>(adc_results.size() / 2 - 1); | ||
timerStart<Timer1>(); | ||
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while (true) | ||
{ | ||
modm::delay(0.5s); | ||
if (!dma_completed) { continue; } | ||
dma_completed = false; | ||
MODM_LOG_INFO << "Measurements" | ||
<< "\r" << modm::endl; | ||
for (uint16_t sample : adc_results) { MODM_LOG_INFO << sample << ", "; } | ||
MODM_LOG_INFO << "\r" << modm::endl; | ||
adc_results.fill(0); | ||
timerStart<Timer1>(); | ||
} | ||
return 0; | ||
} |
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<library> | ||
<extends>modm:nucleo-g070rb</extends> | ||
<options> | ||
<option name="modm:build:build.path">../../../build/nucleo_g070rb/adc_dma</option> | ||
</options> | ||
<modules> | ||
<module>modm:build:scons</module> | ||
<module>modm:platform:timer:1</module> | ||
<module>modm:platform:adc</module> | ||
<module>modm:platform:dma</module> | ||
</modules> | ||
</library> |
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/* | ||
* Copyright (c) 2024, Zühlke Engineering (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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#ifndef EXAMPLE_TimerHANDLER_HPP | ||
#define EXAMPLE_TimerHANDLER_HPP | ||
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#include <modm/architecture/interface/interrupt.hpp> | ||
#include <modm/board.hpp> | ||
#include <modm/platform.hpp> | ||
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#include "adc_dma.hpp" | ||
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using namespace Board; | ||
using namespace modm::platform; | ||
using namespace std::chrono_literals; | ||
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template<class Timer> | ||
void | ||
advancedTimerConfig(uint8_t repetitionCount) | ||
{ | ||
Timer::enable(); | ||
Timer::setMode(Timer::Mode::UpCounter, Timer::SlaveMode::Disabled, | ||
Timer::SlaveModeTrigger::Internal0, Timer::MasterMode::Update, true); | ||
Timer::setPrescaler(84); | ||
Timer::setOverflow(9999); | ||
Timer::setRepetitionCount(repetitionCount); | ||
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Timer::enableOutput(); | ||
Timer::configureOutputChannel(4, Timer::OutputCompareMode::Pwm, 999, Timer::PinState::Enable); | ||
} | ||
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template<class Timer> | ||
static void | ||
timerStart() | ||
{ | ||
Timer::applyAndReset(); | ||
Timer::start(); | ||
} | ||
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#endif // EXAMPLE_TimerHANDLER_HPP |