added first linux files
This commit is contained in:
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30
linux/GpioCookie.cpp
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30
linux/GpioCookie.cpp
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#include "GpioCookie.h"
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#include <fsfw/serviceinterface/ServiceInterface.h>
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GpioCookie::GpioCookie() {
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}
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ReturnValue_t GpioCookie::addGpio(gpioId_t gpioId, GpiodRegular& gpioConfig){
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auto gpioMapIter = gpioMap.find(gpioId);
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if(gpioMapIter == gpioMap.end()) {
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auto statusPair = gpioMap.emplace(gpioId, new GpiodRegular(gpioConfig));
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if (statusPair.second == false) {
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#if FSFW_VERBOSE_LEVEL >= 1
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sif::error << "GpioCookie::addGpio: Failed to add GPIO " << gpioId <<
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"to GPIO map" << std::endl;
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#endif
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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return HasReturnvaluesIF::RETURN_OK;
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}
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#if FSFW_VERBOSE_LEVEL >= 1
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sif::error << "GpioCookie::addGpio: GPIO already exists in GPIO map " << std::endl;
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#endif
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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GpioMap GpioCookie::getGpioMap() const {
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return gpioMap;
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}
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GpioCookie::~GpioCookie() {}
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39
linux/GpioCookie.h
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39
linux/GpioCookie.h
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#ifndef LINUX_GPIO_GPIOCOOKIE_H_
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#define LINUX_GPIO_GPIOCOOKIE_H_
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#include "GpioIF.h"
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#include "gpioDefinitions.h"
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#include <fsfw/devicehandlers/CookieIF.h>
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#include <fsfw/returnvalues/HasReturnvaluesIF.h>
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/**
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* @brief Cookie for the GpioIF. Allows the GpioIF to determine which
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* GPIOs to initialize and whether they should be configured as in- or
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* output.
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* @details One GpioCookie can hold multiple GPIO configurations. To add a new
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* GPIO configuration to a GpioCookie use the GpioCookie::addGpio
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* function.
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*
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* @author J. Meier
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*/
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class GpioCookie: public CookieIF {
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public:
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GpioCookie();
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virtual ~GpioCookie();
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ReturnValue_t addGpio(gpioId_t gpioId, GpiodRegular& gpioConfig);
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/**
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* @brief Get map with registered GPIOs.
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*/
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GpioMap getGpioMap() const;
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private:
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/**
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* Returns a copy of the internal GPIO map.
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*/
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GpioMap gpioMap;
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};
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#endif /* LINUX_GPIO_GPIOCOOKIE_H_ */
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54
linux/GpioIF.h
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54
linux/GpioIF.h
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#ifndef LINUX_GPIO_GPIOIF_H_
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#define LINUX_GPIO_GPIOIF_H_
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#include "gpioDefinitions.h"
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#include <fsfw/returnvalues/HasReturnvaluesIF.h>
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#include <fsfw/devicehandlers/CookieIF.h>
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class GpioCookie;
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/**
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* @brief This class defines the interface for objects requiring the control
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* over GPIOs.
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* @author J. Meier
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*/
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class GpioIF : public HasReturnvaluesIF {
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public:
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virtual ~GpioIF() {};
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/**
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* @brief Called by the GPIO using object.
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* @param cookie Cookie specifying informations of the GPIOs required
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* by a object.
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*/
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virtual ReturnValue_t addGpios(GpioCookie* cookie) = 0;
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/**
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* @brief By implementing this function a child must provide the
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* functionality to pull a certain GPIO to high logic level.
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*
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* @param gpioId A unique number which specifies the GPIO to drive.
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* @return Returns RETURN_OK for success. This should never return RETURN_FAILED.
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*/
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virtual ReturnValue_t pullHigh(gpioId_t gpioId) = 0;
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/**
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* @brief By implementing this function a child must provide the
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* functionality to pull a certain GPIO to low logic level.
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*
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* @param gpioId A unique number which specifies the GPIO to drive.
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*/
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virtual ReturnValue_t pullLow(gpioId_t gpioId) = 0;
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/**
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* @brief This function requires a child to implement the functionality to read the state of
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* an ouput or input gpio.
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*
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* @param gpioId A unique number which specifies the GPIO to read.
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* @param gpioState State of GPIO will be written to this pointer.
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*/
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virtual ReturnValue_t readGpio(gpioId_t gpioId, int* gpioState) = 0;
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};
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#endif /* LINUX_GPIO_GPIOIF_H_ */
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298
linux/LinuxLibgpioIF.cpp
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298
linux/LinuxLibgpioIF.cpp
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#include "LinuxLibgpioIF.h"
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#include "GpioCookie.h"
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#include "gpioDefinitions.h"
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#include <fsfw/serviceinterface/ServiceInterface.h>
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#include <utility>
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#include <unistd.h>
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#include <gpiod.h>
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LinuxLibgpioIF::LinuxLibgpioIF(object_id_t objectId) : SystemObject(objectId) {
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}
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LinuxLibgpioIF::~LinuxLibgpioIF() {
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}
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ReturnValue_t LinuxLibgpioIF::addGpios(GpioCookie* gpioCookie) {
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ReturnValue_t result;
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if(gpioCookie == nullptr) {
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sif::error << "LinuxLibgpioIF::initialize: Invalid cookie" << std::endl;
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return RETURN_FAILED;
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}
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GpioMap mapToAdd = gpioCookie->getGpioMap();
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/* Check whether this ID already exists in the map and remove duplicates */
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result = checkForConflicts(mapToAdd);
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if (result != RETURN_OK){
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return result;
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}
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result = configureGpios(mapToAdd);
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if (result != RETURN_OK) {
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return RETURN_FAILED;
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}
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/* Register new GPIOs in gpioMap */
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gpioMap.insert(mapToAdd.begin(), mapToAdd.end());
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::configureGpios(GpioMap& mapToAdd) {
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for(auto& gpioConfig: mapToAdd) {
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switch(gpioConfig.second->gpioType) {
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case(gpio::GpioTypes::NONE): {
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return GPIO_INVALID_INSTANCE;
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}
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case(gpio::GpioTypes::GPIOD_REGULAR): {
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GpiodRegular* regularGpio = dynamic_cast<GpiodRegular*>(gpioConfig.second);
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if(regularGpio == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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configureRegularGpio(gpioConfig.first, regularGpio);
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break;
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}
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case(gpio::GpioTypes::CALLBACK): {
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auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
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if(gpioCallback->callback == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::READ,
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gpioCallback->initValue, gpioCallback->callbackArgs);
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}
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}
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}
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::configureRegularGpio(gpioId_t gpioId, GpiodRegular *regularGpio) {
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std::string chipname;
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unsigned int lineNum;
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struct gpiod_chip *chip;
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gpio::Direction direction;
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std::string consumer;
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struct gpiod_line *lineHandle;
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int result = 0;
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chipname = regularGpio->chipname;
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chip = gpiod_chip_open_by_name(chipname.c_str());
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if (!chip) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to open chip "
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<< chipname << ". Gpio ID: " << gpioId << std::endl;
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return RETURN_FAILED;
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}
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lineNum = regularGpio->lineNum;
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lineHandle = gpiod_chip_get_line(chip, lineNum);
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if (!lineHandle) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to open line" << std::endl;
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gpiod_chip_close(chip);
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return RETURN_FAILED;
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}
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direction = regularGpio->direction;
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consumer = regularGpio->consumer;
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/* Configure direction and add a description to the GPIO */
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switch (direction) {
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case(gpio::OUT): {
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result = gpiod_line_request_output(lineHandle, consumer.c_str(),
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regularGpio->initValue);
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if (result < 0) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line " << lineNum <<
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" from GPIO instance with ID: " << gpioId << std::endl;
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gpiod_line_release(lineHandle);
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return RETURN_FAILED;
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}
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break;
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}
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case(gpio::IN): {
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result = gpiod_line_request_input(lineHandle, consumer.c_str());
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if (result < 0) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line "
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<< lineNum << " from GPIO instance with ID: " << gpioId << std::endl;
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gpiod_line_release(lineHandle);
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return RETURN_FAILED;
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}
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break;
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}
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default: {
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sif::error << "LinuxLibgpioIF::configureGpios: Invalid direction specified"
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<< std::endl;
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return GPIO_INVALID_INSTANCE;
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}
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}
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/**
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* Write line handle to GPIO configuration instance so it can later be used to set or
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* read states of GPIOs.
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*/
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regularGpio->lineHandle = lineHandle;
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::pullHigh(gpioId_t gpioId) {
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gpioMapIter = gpioMap.find(gpioId);
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if (gpioMapIter == gpioMap.end()) {
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sif::warning << "LinuxLibgpioIF::driveGpio: Unknown GPIOD ID " << gpioId << std::endl;
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return UNKNOWN_GPIO_ID;
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}
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if(gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
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return driveGpio(gpioId, dynamic_cast<GpiodRegular*>(gpioMapIter->second), 1);
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}
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else {
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auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
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if(gpioCallback->callback == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::WRITE,
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1, gpioCallback->callbackArgs);
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}
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return GPIO_TYPE_FAILURE;
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}
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ReturnValue_t LinuxLibgpioIF::pullLow(gpioId_t gpioId) {
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gpioMapIter = gpioMap.find(gpioId);
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if (gpioMapIter == gpioMap.end()) {
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sif::warning << "LinuxLibgpioIF::driveGpio: Unknown GPIOD ID " << gpioId << std::endl;
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return UNKNOWN_GPIO_ID;
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}
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if(gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
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return driveGpio(gpioId, dynamic_cast<GpiodRegular*>(gpioMapIter->second), 0);
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}
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else {
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auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
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if(gpioCallback->callback == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::WRITE,
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0, gpioCallback->callbackArgs);
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}
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return GPIO_TYPE_FAILURE;
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}
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ReturnValue_t LinuxLibgpioIF::driveGpio(gpioId_t gpioId,
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GpiodRegular* regularGpio, unsigned int logicLevel) {
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if(regularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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int result = gpiod_line_set_value(regularGpio->lineHandle, logicLevel);
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if (result < 0) {
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sif::warning << "LinuxLibgpioIF::driveGpio: Failed to pull GPIO with ID " << gpioId <<
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" to logic level " << logicLevel << std::endl;
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return DRIVE_GPIO_FAILURE;
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}
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::readGpio(gpioId_t gpioId, int* gpioState) {
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gpioMapIter = gpioMap.find(gpioId);
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if (gpioMapIter == gpioMap.end()){
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sif::warning << "LinuxLibgpioIF::readGpio: Unknown GPIOD ID " << gpioId << std::endl;
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return UNKNOWN_GPIO_ID;
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}
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if(gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
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GpiodRegular* regularGpio = dynamic_cast<GpiodRegular*>(gpioMapIter->second);
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if(regularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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*gpioState = gpiod_line_get_value(regularGpio->lineHandle);
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}
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else {
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}
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::checkForConflicts(GpioMap& mapToAdd){
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ReturnValue_t status = HasReturnvaluesIF::RETURN_OK;
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ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
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for(auto& gpioConfig: mapToAdd) {
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switch(gpioConfig.second->gpioType) {
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case(gpio::GpioTypes::GPIOD_REGULAR): {
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auto regularGpio = dynamic_cast<GpiodRegular*>(gpioConfig.second);
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if(regularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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/* Check for conflicts and remove duplicates if necessary */
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result = checkForConflictsRegularGpio(gpioConfig.first, regularGpio, mapToAdd);
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if(result != HasReturnvaluesIF::RETURN_OK) {
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status = result;
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}
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break;
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}
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case(gpio::GpioTypes::CALLBACK): {
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auto callbackGpio = dynamic_cast<GpioCallback*>(gpioConfig.second);
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if(callbackGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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/* Check for conflicts and remove duplicates if necessary */
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result = checkForConflictsCallbackGpio(gpioConfig.first, callbackGpio, mapToAdd);
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if(result != HasReturnvaluesIF::RETURN_OK) {
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status = result;
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}
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break;
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}
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default: {
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}
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}
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}
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return status;
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}
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ReturnValue_t LinuxLibgpioIF::checkForConflictsRegularGpio(gpioId_t gpioIdToCheck,
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GpiodRegular* gpioToCheck, GpioMap& mapToAdd) {
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/* Cross check with private map */
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gpioMapIter = gpioMap.find(gpioIdToCheck);
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if(gpioMapIter != gpioMap.end()) {
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if(gpioMapIter->second->gpioType != gpio::GpioTypes::GPIOD_REGULAR) {
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sif::warning << "LinuxLibgpioIF::checkForConflicts: ID already exists for different "
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"GPIO type" << gpioIdToCheck << ". Removing duplicate." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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return HasReturnvaluesIF::RETURN_OK;
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}
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auto ownRegularGpio = dynamic_cast<GpiodRegular*>(gpioMapIter->second);
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if(ownRegularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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/* Remove element from map to add because a entry for this GPIO
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already exists */
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sif::warning << "LinuxLibgpioIF::checkForConflictsRegularGpio: Duplicate GPIO definition"
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<< " detected. Duplicate will be removed from map to add." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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}
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return HasReturnvaluesIF::RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::checkForConflictsCallbackGpio(gpioId_t gpioIdToCheck,
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GpioCallback *callbackGpio, GpioMap& mapToAdd) {
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/* Cross check with private map */
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gpioMapIter = gpioMap.find(gpioIdToCheck);
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if(gpioMapIter != gpioMap.end()) {
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if(gpioMapIter->second->gpioType != gpio::GpioTypes::CALLBACK) {
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sif::warning << "LinuxLibgpioIF::checkForConflicts: ID already exists for different "
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"GPIO type" << gpioIdToCheck << ". Removing duplicate." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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return HasReturnvaluesIF::RETURN_OK;
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}
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/* Remove element from map to add because a entry for this GPIO
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already exists */
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sif::warning << "LinuxLibgpioIF::checkForConflictsRegularGpio: Duplicate GPIO definition"
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<< " detected. Duplicate will be removed from map to add." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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}
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return HasReturnvaluesIF::RETURN_OK;
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}
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77
linux/LinuxLibgpioIF.h
Normal file
77
linux/LinuxLibgpioIF.h
Normal file
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#ifndef LINUX_GPIO_LINUXLIBGPIOIF_H_
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#define LINUX_GPIO_LINUXLIBGPIOIF_H_
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#include <linux/gpio/GpioIF.h>
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#include <fsfwconfig/returnvalues/classIds.h>
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#include <fsfw/objectmanager/SystemObject.h>
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class GpioCookie;
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/**
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* @brief This class implements the GpioIF for a linux based system. The
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* implementation is based on the libgpiod lib which requires linux 4.8
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* or higher.
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* @note The Petalinux SDK from Xilinx supports libgpiod since Petalinux
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* 2019.1.
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*/
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class LinuxLibgpioIF : public GpioIF, public SystemObject {
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public:
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static const uint8_t gpioRetvalId = CLASS_ID::LINUX_LIBGPIO_IF;
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static constexpr ReturnValue_t UNKNOWN_GPIO_ID =
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HasReturnvaluesIF::makeReturnCode(gpioRetvalId, 1);
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static constexpr ReturnValue_t DRIVE_GPIO_FAILURE =
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HasReturnvaluesIF::makeReturnCode(gpioRetvalId, 2);
|
||||
static constexpr ReturnValue_t GPIO_TYPE_FAILURE =
|
||||
HasReturnvaluesIF::makeReturnCode(gpioRetvalId, 3);
|
||||
static constexpr ReturnValue_t GPIO_INVALID_INSTANCE =
|
||||
HasReturnvaluesIF::makeReturnCode(gpioRetvalId, 4);
|
||||
|
||||
LinuxLibgpioIF(object_id_t objectId);
|
||||
virtual ~LinuxLibgpioIF();
|
||||
|
||||
ReturnValue_t addGpios(GpioCookie* gpioCookie) override;
|
||||
ReturnValue_t pullHigh(gpioId_t gpioId) override;
|
||||
ReturnValue_t pullLow(gpioId_t gpioId) override;
|
||||
ReturnValue_t readGpio(gpioId_t gpioId, int* gpioState) override;
|
||||
|
||||
private:
|
||||
/* Holds the information and configuration of all used GPIOs */
|
||||
GpioMap gpioMap;
|
||||
GpioMapIter gpioMapIter;
|
||||
|
||||
/**
|
||||
* @brief This functions drives line of a GPIO specified by the GPIO ID.
|
||||
*
|
||||
* @param gpioId The GPIO ID of the GPIO to drive.
|
||||
* @param logiclevel The logic level to set. O or 1.
|
||||
*/
|
||||
ReturnValue_t driveGpio(gpioId_t gpioId, GpiodRegular* regularGpio, unsigned int logiclevel);
|
||||
|
||||
ReturnValue_t configureRegularGpio(gpioId_t gpioId, GpiodRegular* regularGpio);
|
||||
|
||||
/**
|
||||
* @brief This function checks if GPIOs are already registered and whether
|
||||
* there exists a conflict in the GPIO configuration. E.g. the
|
||||
* direction.
|
||||
*
|
||||
* @param mapToAdd The GPIOs which shall be added to the gpioMap.
|
||||
*
|
||||
* @return RETURN_OK if successful, otherwise RETURN_FAILED
|
||||
*/
|
||||
ReturnValue_t checkForConflicts(GpioMap& mapToAdd);
|
||||
|
||||
ReturnValue_t checkForConflictsRegularGpio(gpioId_t gpiodId, GpiodRegular* regularGpio,
|
||||
GpioMap& mapToAdd);
|
||||
ReturnValue_t checkForConflictsCallbackGpio(gpioId_t gpiodId, GpioCallback* regularGpio,
|
||||
GpioMap& mapToAdd);
|
||||
|
||||
/**
|
||||
* @brief Performs the initial configuration of all GPIOs specified in the GpioMap mapToAdd.
|
||||
*/
|
||||
ReturnValue_t configureGpios(GpioMap& mapToAdd);
|
||||
|
||||
};
|
||||
|
||||
#endif /* LINUX_GPIO_LINUXLIBGPIOIF_H_ */
|
||||
92
linux/gpioDefinitions.h
Normal file
92
linux/gpioDefinitions.h
Normal file
@ -0,0 +1,92 @@
|
||||
#ifndef LINUX_GPIO_GPIODEFINITIONS_H_
|
||||
#define LINUX_GPIO_GPIODEFINITIONS_H_
|
||||
|
||||
#include <string>
|
||||
#include <unordered_map>
|
||||
|
||||
using gpioId_t = uint16_t;
|
||||
|
||||
namespace gpio {
|
||||
enum Direction {
|
||||
IN = 0,
|
||||
OUT = 1
|
||||
};
|
||||
|
||||
enum GpioOperation {
|
||||
READ,
|
||||
WRITE
|
||||
};
|
||||
|
||||
enum GpioTypes {
|
||||
NONE,
|
||||
GPIOD_REGULAR,
|
||||
CALLBACK
|
||||
};
|
||||
|
||||
static constexpr gpioId_t NO_GPIO = -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Struct containing information about the GPIO to use. This is
|
||||
* required by the libgpiod to access and drive a GPIO.
|
||||
* @param chipname String of the chipname specifying the group which contains the GPIO to
|
||||
* access. E.g. gpiochip0. To detect names of GPIO groups run gpiodetect on
|
||||
* the linux command line.
|
||||
* @param lineNum The offset of the GPIO within the GPIO group.
|
||||
* @param consumer Name of the consumer. Simply a description of the GPIO configuration.
|
||||
* @param direction Specifies whether the GPIO should be used as in- or output.
|
||||
* @param initValue Defines the initial state of the GPIO when configured as output.
|
||||
* Only required for output GPIOs.
|
||||
* @param lineHandle The handle returned by gpiod_chip_get_line will be later written to this
|
||||
* pointer.
|
||||
*/
|
||||
class GpioBase {
|
||||
public:
|
||||
|
||||
GpioBase() = default;
|
||||
|
||||
GpioBase(gpio::GpioTypes gpioType, std::string consumer, gpio::Direction direction,
|
||||
int initValue):
|
||||
gpioType(gpioType), consumer(consumer),direction(direction), initValue(initValue) {}
|
||||
|
||||
virtual~ GpioBase() {};
|
||||
|
||||
/* Can be used to cast GpioBase to a concrete child implementation */
|
||||
gpio::GpioTypes gpioType = gpio::GpioTypes::NONE;
|
||||
std::string consumer;
|
||||
gpio::Direction direction = gpio::Direction::IN;
|
||||
int initValue = 0;
|
||||
};
|
||||
|
||||
class GpiodRegular: public GpioBase {
|
||||
public:
|
||||
GpiodRegular(): GpioBase(gpio::GpioTypes::GPIOD_REGULAR, std::string(),
|
||||
gpio::Direction::IN, 0) {};
|
||||
|
||||
GpiodRegular(std::string chipname_, int lineNum_, std::string consumer_,
|
||||
gpio::Direction direction_, int initValue_):
|
||||
GpioBase(gpio::GpioTypes::GPIOD_REGULAR, consumer_, direction_, initValue_),
|
||||
chipname(chipname_), lineNum(lineNum_) {}
|
||||
std::string chipname;
|
||||
int lineNum = 0;
|
||||
struct gpiod_line* lineHandle = nullptr;
|
||||
};
|
||||
|
||||
class GpioCallback: public GpioBase {
|
||||
public:
|
||||
GpioCallback(std::string consumer, gpio::Direction direction_, int initValue_,
|
||||
void (* callback) (gpioId_t gpioId, gpio::GpioOperation gpioOp, int value, void* args),
|
||||
void* callbackArgs):
|
||||
GpioBase(gpio::GpioTypes::CALLBACK, consumer, direction_, initValue_),
|
||||
callback(callback), callbackArgs(callbackArgs) {}
|
||||
|
||||
void (* callback) (gpioId_t gpioId, gpio::GpioOperation gpioOp,
|
||||
int value, void* args) = nullptr;
|
||||
void* callbackArgs = nullptr;
|
||||
};
|
||||
|
||||
|
||||
using GpioMap = std::unordered_map<gpioId_t, GpioBase*>;
|
||||
using GpioMapIter = GpioMap::iterator;
|
||||
|
||||
#endif /* LINUX_GPIO_GPIODEFINITIONS_H_ */
|
||||
Loading…
Reference in New Issue
Block a user