mirror of https://github.com/rusefi/rusefi-1.git
109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
/*
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* @file accelerometer.cpp
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*
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* stm32f4discovery has MEMS LIS302DL
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* www.st.com/resource/en/datasheet/lis302dl.pdf
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*
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* SPI1
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* LIS302DL_SPI_SCK PA5
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* LIS302DL_SPI_MISO PA6
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* LIS302DL_SPI_MOSI PA7
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* LIS302DL_SPI_CS_PIN PE3
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*
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*
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*
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* @date May 19, 2016
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* @author Andrey Belomutskiy, (c) 2012-2018
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*/
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#include "accelerometer.h"
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#include "lis302dl.h"
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#include "hardware.h"
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#include "mpu_util.h"
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EXTERN_ENGINE;
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#if EFI_MEMS || defined(__DOXYGEN__)
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static SPIDriver *driver;
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/*
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* SPI1 configuration structure.
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* Speed 5.25MHz, CPHA=1, CPOL=1, 8bits frames, MSb transmitted first.
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* The slave select line is the pin GPIOE_CS_SPI on the port GPIOE.
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*/
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static const SPIConfig accelerometerCfg = {
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NULL,
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/* HW dependent part.*/
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GPIOE,
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GPIOE_PIN3,
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SPI_CR1_BR_0 | SPI_CR1_BR_1 | SPI_CR1_CPOL | SPI_CR1_CPHA
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};
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#endif /* EFI_MEMS */
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void configureAccelerometerPins(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
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// engineConfiguration->LIS302DLCsPin = GPIOE_3; // we have a conflict with VVT output on Miata
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// boardConfiguration->is_enabled_spi_1 = true; // we have a conflict with PA5 input pin
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// stm32f4discovery defaults
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boardConfiguration->spi1mosiPin = GPIOA_7;
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boardConfiguration->spi1misoPin = GPIOA_6;
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boardConfiguration->spi1sckPin = GPIOA_5;
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}
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#if EFI_MEMS || defined(__DOXYGEN__)
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static THD_WORKING_AREA(ivThreadStack, UTILITY_THREAD_STACK_SIZE);
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static msg_t ivThread(int param) {
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(void) param;
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chRegSetThreadName("Acc SPI");
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while (true) {
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// has to be a thread since we want to use blocking method - blocking method only available in threads, not in interrupt handler
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// todo: migrate to async SPI API?
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engine->sensors.accelerometer.x = (int8_t)lis302dlReadRegister(driver, LIS302DL_OUTX);
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engine->sensors.accelerometer.y = (int8_t)lis302dlReadRegister(driver, LIS302DL_OUTY);
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chThdSleepMilliseconds(20);
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}
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#if defined __GNUC__
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return -1;
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#endif
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}
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void initAccelerometer(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
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if (engineConfiguration->LIS302DLCsPin == GPIO_UNASSIGNED)
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return; // not used
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if (!boardConfiguration->is_enabled_spi_1)
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return; // temporary
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driver = getSpiDevice(engineConfiguration->accelerometerSpiDevice);
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turnOnSpi(engineConfiguration->accelerometerSpiDevice);
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spiStart(driver, &accelerometerCfg);
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initSpiCs((SPIConfig *)driver->config, engineConfiguration->LIS302DLCsPin);
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// memsCs.initPin("LIS302 CS", engineConfiguration->LIS302DLCsPin);
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// memsCfg.ssport = getHwPort("mmc", boardConfiguration->sdCardCsPin);
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// memsCfg.sspad = getHwPin("mmc", boardConfiguration->sdCardCsPin);
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/* LIS302DL initialization.*/
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lis302dlWriteRegister(driver, LIS302DL_CTRL_REG1, 0x47); // enable device, enable XYZ
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lis302dlWriteRegister(driver, LIS302DL_CTRL_REG2, 0x00); // 4 wire mode
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lis302dlWriteRegister(driver, LIS302DL_CTRL_REG3, 0x00);
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chThdCreateStatic(ivThreadStack, sizeof(ivThreadStack), NORMALPRIO, (tfunc_t) ivThread, NULL);
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}
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#endif /* EFI_MEMS */
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float getLongitudinalAcceleration(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
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return engine->sensors.accelerometer.x;
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}
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float getTransverseAcceleration(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
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return engine->sensors.accelerometer.y;
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}
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