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rlehrleh
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[exmaples] Add SPI DMA exmaples for Nucleo-F439ZI and -F767ZI
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‎examples/nucleo_f439zi/spi_dma/main.cpp

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/*
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* Copyright (c) 2021, Raphael Lehmann
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*
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* This file is part of the modm project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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// ----------------------------------------------------------------------------
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#include <modm/board.hpp>
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#include <modm/processing.hpp>
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using Mosi = GpioOutputB5;
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using Miso = GpioInputB4;
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using Sck = GpioOutputB3;
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using DmaRx = Dma2::Channel0;
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using DmaTx = Dma2::Channel3;
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using Spi = SpiMaster1_Dma<DmaRx, DmaTx>;
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class SpiThread : public modm::pt::Protothread
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{
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public:
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bool
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update()
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{
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PT_BEGIN();
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// Enable DMA controller
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Dma2::enable();
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// Enable and initialize SPI
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Spi::connect<Mosi::Mosi, Miso::Miso, Sck::Sck>();
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Spi::initialize<Board::SystemClock, 328_kHz>();
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while (true)
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{
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MODM_LOG_INFO << "sendBuffer adress: " << modm::hex << sendBuffer << modm::endl;
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MODM_LOG_INFO << "receiveBuffer adress: " << modm::hex << receiveBuffer << modm::endl;
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MODM_LOG_INFO << "Info: 0x20000000 is start of SRAM1" << modm::endl;
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MODM_LOG_INFO << "Before first transfer" << modm::endl;
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// send out 12 bytes, don't care about response
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PT_CALL(Spi::transfer(sendBuffer, nullptr, 12));
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MODM_LOG_INFO << "After first transfer" << modm::endl;
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// send out 12 bytes, read in 12 bytes
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PT_CALL(Spi::transfer(sendBuffer, receiveBuffer, 12));
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MODM_LOG_INFO << "After second transfer" << modm::endl << modm::endl;
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timeout.restart(500ms);
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PT_WAIT_UNTIL(timeout.isExpired());
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}
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PT_END();
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}
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private:
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uint8_t sendBuffer[13] { "data to send" };
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uint8_t receiveBuffer[13];
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modm::ShortTimeout timeout;
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};
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SpiThread spiThread;
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int main()
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{
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Board::initialize();
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MODM_LOG_INFO << "Hello from SPI-DMA example on Nucleo-F439ZI!" << modm::endl;
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while (true)
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{
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spiThread.update();
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}
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return 0;
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}

‎examples/nucleo_f439zi/spi_dma/project.xml

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<library>
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<extends>modm:nucleo-f439zi</extends>
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<options>
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<option name="modm:build:build.path">../../../build/nucleo_f439zi/spi_dma</option>
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</options>
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<modules>
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<module>modm:platform:gpio</module>
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<module>modm:platform:dma</module>
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<module>modm:platform:spi:1</module>
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<module>modm:processing:protothread</module>
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<module>modm:processing:timer</module>
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<module>modm:build:scons</module>
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</modules>
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</library>

‎examples/nucleo_f767zi/spi_dma/main.cpp

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/*
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* Copyright (c) 2021, Raphael Lehmann
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*
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* This file is part of the modm project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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// ----------------------------------------------------------------------------
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#include <modm/board.hpp>
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#include <modm/processing.hpp>
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using Mosi = GpioOutputB5;
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using Miso = GpioInputB4;
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using Sck = GpioOutputB3;
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using DmaRx = Dma2::Channel0;
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using DmaTx = Dma2::Channel3;
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using Spi = SpiMaster1_Dma<DmaRx, DmaTx>;
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class SpiThread : public modm::pt::Protothread
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{
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public:
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bool
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update()
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{
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PT_BEGIN();
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// Enable DMA controller
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Dma2::enable();
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// Enable and initialize SPI
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Spi::connect<Mosi::Mosi, Miso::Miso, Sck::Sck>();
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Spi::initialize<Board::SystemClock, 422_kHz>();
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while (true)
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{
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MODM_LOG_INFO << "sendBuffer adress: " << modm::hex << sendBuffer << modm::endl;
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MODM_LOG_INFO << "receiveBuffer adress: " << modm::hex << receiveBuffer << modm::endl;
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MODM_LOG_INFO << "Info: 0x20000000 is start of SRAM1" << modm::endl;
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MODM_LOG_INFO << "Before first transfer" << modm::endl;
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// send out 12 bytes, don't care about response
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PT_CALL(Spi::transfer(sendBuffer, nullptr, 12));
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MODM_LOG_INFO << "After first transfer" << modm::endl;
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// send out 12 bytes, read in 12 bytes
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PT_CALL(Spi::transfer(sendBuffer, receiveBuffer, 12));
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MODM_LOG_INFO << "After second transfer" << modm::endl << modm::endl;
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timeout.restart(500ms);
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PT_WAIT_UNTIL(timeout.isExpired());
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}
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PT_END();
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}
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private:
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uint8_t sendBuffer[13] { "data to send" };
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uint8_t receiveBuffer[13];
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modm::ShortTimeout timeout;
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};
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SpiThread spiThread;
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int main()
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{
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Board::initialize();
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MODM_LOG_INFO << "Hello from SPI-DMA example on Nucleo-F767ZI!" << modm::endl;
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while (true)
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{
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spiThread.update();
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}
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return 0;
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}

‎examples/nucleo_f767zi/spi_dma/project.xml

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<library>
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<extends>modm:nucleo-f767zi</extends>
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<options>
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<option name="modm:build:build.path">../../../build/nucleo_f767zi/spi_dma</option>
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</options>
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<modules>
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<module>modm:platform:gpio</module>
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<module>modm:platform:dma</module>
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<module>modm:platform:spi:1</module>
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<module>modm:processing:protothread</module>
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<module>modm:processing:timer</module>
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<module>modm:build:scons</module>
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</modules>
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</library>

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