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Add feature to open GPIO by line name

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This features was provided by Jakob Meier as part of
eive/fsfw#19 .

It adds the feature to open GPIOs supplying their line names.
This commit is contained in:
Robin Müller
2021-10-11 19:55:37 +02:00
parent f8e9042943
commit cae3feb5da
3 changed files with 235 additions and 98 deletions
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37
hal/src/fsfw_hal/linux/gpio/LinuxLibgpioIF.h
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@@ -1,19 +1,19 @@
#ifndef LINUX_GPIO_LINUXLIBGPIOIF_H_
#define LINUX_GPIO_LINUXLIBGPIOIF_H_
#include "../../common/gpio/GpioIF.h"
#include <returnvalues/classIds.h>
#include <fsfw/objectmanager/SystemObject.h>
#include "fsfw/returnvalues/FwClassIds.h"
#include "fsfw_hal/common/gpio/GpioIF.h"
#include "fsfw/objectmanager/SystemObject.h"
class GpioCookie;
class GpiodRegularIF;
/**
* @brief This class implements the GpioIF for a linux based system. The
* implementation is based on the libgpiod lib which requires linux 4.8
* or higher.
* @note The Petalinux SDK from Xilinx supports libgpiod since Petalinux
* 2019.1.
* @brief This class implements the GpioIF for a linux based system.
* @details
* This implementation is based on the libgpiod lib which requires Linux 4.8 or higher.
* @note
* The Petalinux SDK from Xilinx supports libgpiod since Petalinux 2019.1.
*/
class LinuxLibgpioIF : public GpioIF, public SystemObject {
public:
@@ -28,6 +28,8 @@ public:
HasReturnvaluesIF::makeReturnCode(gpioRetvalId, 3);
static constexpr ReturnValue_t GPIO_INVALID_INSTANCE =
HasReturnvaluesIF::makeReturnCode(gpioRetvalId, 4);
static constexpr ReturnValue_t GPIO_DUPLICATE_DETECTED =
HasReturnvaluesIF::makeReturnCode(gpioRetvalId, 5);
LinuxLibgpioIF(object_id_t objectId);
virtual ~LinuxLibgpioIF();
@@ -38,7 +40,13 @@ public:
ReturnValue_t readGpio(gpioId_t gpioId, int* gpioState) override;
private:
/* Holds the information and configuration of all used GPIOs */
static const size_t MAX_CHIPNAME_LENGTH = 11;
static const int LINE_NOT_EXISTS = 0;
static const int LINE_ERROR = -1;
static const int LINE_FOUND = 1;
// Holds the information and configuration of all used GPIOs
GpioUnorderedMap gpioMap;
GpioUnorderedMapIter gpioMapIter;
@@ -53,8 +61,10 @@ private:
ReturnValue_t configureGpioByLabel(gpioId_t gpioId, GpiodRegularByLabel& gpioByLabel);
ReturnValue_t configureGpioByChip(gpioId_t gpioId, GpiodRegularByChip& gpioByChip);
ReturnValue_t configureRegularGpio(gpioId_t gpioId, gpio::GpioTypes gpioType,
struct gpiod_chip* chip, GpiodRegularBase& regularGpio, std::string failOutput);
ReturnValue_t configureGpioByLineName(gpioId_t gpioId,
GpiodRegularByLineName &gpioByLineName);
ReturnValue_t configureRegularGpio(gpioId_t gpioId, struct gpiod_chip* chip,
GpiodRegularBase& regularGpio, std::string failOutput);
/**
* @brief This function checks if GPIOs are already registered and whether
@@ -67,16 +77,15 @@ private:
*/
ReturnValue_t checkForConflicts(GpioMap& mapToAdd);
ReturnValue_t checkForConflictsRegularGpio(gpioId_t gpiodId, GpiodRegularBase& regularGpio,
ReturnValue_t checkForConflictsById(gpioId_t gpiodId, gpio::GpioTypes type,
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);
void parseFindeLineResult(int result, std::string& lineName);
};
#endif /* LINUX_GPIO_LINUXLIBGPIOIF_H_ */