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refactored GPIO to support callbacks

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This commit is contained in:
Robin Müller
2021-02-23 13:24:05 +01:00
parent c042bbea63
commit 434d0586b3
9 changed files with 268 additions and 125 deletions
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292
linux/gpio/LinuxLibgpioIF.cpp
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@ -2,18 +2,20 @@
#include "GpioCookie.h"
#include <fsfw/serviceinterface/ServiceInterface.h>
#include <linux/gpio/gpioDefinitions.h>
#include <utility>
#include <unistd.h>
#include <gpiod.h>
LinuxLibgpioIF::LinuxLibgpioIF(object_id_t objectId) : SystemObject(objectId) {
}
LinuxLibgpioIF::~LinuxLibgpioIF() {
}
ReturnValue_t LinuxLibgpioIF::initialize(GpioCookie* gpioCookie){
ReturnValue_t LinuxLibgpioIF::addGpios(GpioCookie* gpioCookie) {
ReturnValue_t result;
if(gpioCookie == nullptr) {
sif::error << "LinuxLibgpioIF::initialize: Invalid cookie" << std::endl;
@ -32,101 +34,153 @@ ReturnValue_t LinuxLibgpioIF::initialize(GpioCookie* gpioCookie){
return RETURN_FAILED;
}
/* Register new GPIOs in gpioMap*/
/* Register new GPIOs in gpioMap */
gpioMap.insert(mapToAdd.begin(), mapToAdd.end());
return RETURN_OK;
}
ReturnValue_t LinuxLibgpioIF::configureGpios(GpioMap& mapToAdd) {
for(auto& gpioConfig: mapToAdd) {
switch(gpioConfig.second->gpioType) {
case(gpio::GpioTypes::NONE): {
return GPIO_INVALID_INSTANCE;
}
case(gpio::GpioTypes::GPIOD_REGULAR): {
GpiodRegular* regularGpio = dynamic_cast<GpiodRegular*>(gpioConfig.second);
configureRegularGpio(gpioConfig.first, regularGpio);
break;
}
case(gpio::GpioTypes::CALLBACK): {
auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
if(gpioCallback->callback == nullptr) {
return GPIO_INVALID_INSTANCE;
}
gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::READ,
0, gpioCallback->callbackArgs);
}
}
}
return RETURN_OK;
}
ReturnValue_t LinuxLibgpioIF::configureRegularGpio(gpioId_t gpioId, GpiodRegular *regularGpio) {
std::string chipname;
unsigned int lineNum;
struct gpiod_chip *chip;
gpio::Direction direction;
std::string consumer;
struct gpiod_line *lineHandle;
int result;
int result = 0;
for(auto& gpioConfig: mapToAdd) {
chipname = gpioConfig.second.chipname;
chip = gpiod_chip_open_by_name(chipname.c_str());
if (!chip) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to open chip "
<< chipname << ". Gpio ID: " << gpioConfig.first << std::endl;
return RETURN_FAILED;
}
lineNum = gpioConfig.second.lineNum;
lineHandle = gpiod_chip_get_line(chip, lineNum);
if (!lineHandle) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to open line" << std::endl;
gpiod_chip_close(chip);
return RETURN_FAILED;
}
direction = gpioConfig.second.direction;
consumer = gpioConfig.second.consumer;
/* Configure direction and add a description to the GPIO */
switch (direction) {
case gpio::OUT:
result = gpiod_line_request_output(lineHandle, consumer.c_str(),
gpioConfig.second.initValue);
if (result < 0) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line "
<< lineNum << " from GPIO instance with ID: " << gpioConfig.first
<< std::endl;
gpiod_line_release(lineHandle);
return RETURN_FAILED;
}
break;
case gpio::IN:
result = gpiod_line_request_input(lineHandle, consumer.c_str());
if (result < 0) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line "
<< lineNum << " from GPIO instance with ID: " << gpioConfig.first
<< std::endl;
gpiod_line_release(lineHandle);
return RETURN_FAILED;
}
break;
default:
sif::error << "LinuxLibgpioIF::configureGpios: Invalid direction specified"
<< std::endl;
return RETURN_FAILED;
}
/**
* Write line handle to GPIO configuration instance so it can later be used to set or
* read states of GPIOs.
*/
gpioConfig.second.lineHandle = lineHandle;
}
return RETURN_OK;
}
ReturnValue_t LinuxLibgpioIF::pullHigh(gpioId_t gpioId){
return driveGpio(gpioId, 1);
}
ReturnValue_t LinuxLibgpioIF::pullLow(gpioId_t gpioId){
return driveGpio(gpioId, 0);
}
ReturnValue_t LinuxLibgpioIF::driveGpio(gpioId_t gpioId,
unsigned int logiclevel) {
int result;
struct gpiod_line *lineHandle;
gpioMapIter = gpioMap.find(gpioId);
if (gpioMapIter == gpioMap.end()){
sif::debug << "LinuxLibgpioIF::driveGpio: Unknown gpio id " << gpioId << std::endl;
chipname = regularGpio->chipname;
chip = gpiod_chip_open_by_name(chipname.c_str());
if (!chip) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to open chip "
<< chipname << ". Gpio ID: " << gpioId << std::endl;
return RETURN_FAILED;
}
lineHandle = gpioMapIter->second.lineHandle;
result = gpiod_line_set_value(lineHandle, logiclevel);
lineNum = regularGpio->lineNum;
lineHandle = gpiod_chip_get_line(chip, lineNum);
if (!lineHandle) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to open line" << std::endl;
gpiod_chip_close(chip);
return RETURN_FAILED;
}
direction = regularGpio->direction;
consumer = regularGpio->consumer;
/* Configure direction and add a description to the GPIO */
switch (direction) {
case(gpio::OUT): {
result = gpiod_line_request_output(lineHandle, consumer.c_str(),
regularGpio->initValue);
if (result < 0) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line " << lineNum <<
" from GPIO instance with ID: " << gpioId << std::endl;
gpiod_line_release(lineHandle);
return RETURN_FAILED;
}
break;
}
case(gpio::IN): {
result = gpiod_line_request_input(lineHandle, consumer.c_str());
if (result < 0) {
sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line "
<< lineNum << " from GPIO instance with ID: " << gpioId << std::endl;
gpiod_line_release(lineHandle);
return RETURN_FAILED;
}
break;
}
default: {
sif::error << "LinuxLibgpioIF::configureGpios: Invalid direction specified"
<< std::endl;
return GPIO_INVALID_INSTANCE;
}
}
/**
* Write line handle to GPIO configuration instance so it can later be used to set or
* read states of GPIOs.
*/
regularGpio->lineHandle = lineHandle;
return RETURN_OK;
}
ReturnValue_t LinuxLibgpioIF::pullHigh(gpioId_t gpioId) {
gpioMapIter = gpioMap.find(gpioId);
if (gpioMapIter == gpioMap.end()) {
sif::warning << "LinuxLibgpioIF::driveGpio: Unknown GPIOD ID " << gpioId << std::endl;
return UNKNOWN_GPIO_ID;
}
if(gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
return driveGpio(gpioId, dynamic_cast<GpiodRegular*>(gpioMapIter->second), 1);
}
else {
auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
if(gpioCallback->callback == nullptr) {
return GPIO_INVALID_INSTANCE;
}
gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::WRITE,
1, gpioCallback->callbackArgs);
}
return GPIO_TYPE_FAILURE;
}
ReturnValue_t LinuxLibgpioIF::pullLow(gpioId_t gpioId) {
gpioMapIter = gpioMap.find(gpioId);
if (gpioMapIter == gpioMap.end()) {
sif::warning << "LinuxLibgpioIF::driveGpio: Unknown GPIOD ID " << gpioId << std::endl;
return UNKNOWN_GPIO_ID;
}
if(gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
return driveGpio(gpioId, dynamic_cast<GpiodRegular*>(gpioMapIter->second), 0);
}
else {
auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
if(gpioCallback->callback == nullptr) {
return GPIO_INVALID_INSTANCE;
}
gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::WRITE,
0, gpioCallback->callbackArgs);
}
return GPIO_TYPE_FAILURE;
}
ReturnValue_t LinuxLibgpioIF::driveGpio(gpioId_t gpioId,
GpiodRegular* regularGpio, unsigned int logicLevel) {
if(regularGpio == nullptr) {
return GPIO_TYPE_FAILURE;
}
int result = gpiod_line_set_value(regularGpio->lineHandle, logicLevel);
if (result < 0) {
sif::error << "LinuxLibgpioIF::driveGpio: Failed to pull GPIO with ID "
<< gpioId << " to logic level " << logiclevel << std::endl;
sif::warning << "LinuxLibgpioIF::driveGpio: Failed to pull GPIO with ID " << gpioId <<
" to logic level " << logicLevel << std::endl;
return DRIVE_GPIO_FAILURE;
}
@ -134,38 +188,76 @@ ReturnValue_t LinuxLibgpioIF::driveGpio(gpioId_t gpioId,
}
ReturnValue_t LinuxLibgpioIF::readGpio(gpioId_t gpioId, int* gpioState) {
struct gpiod_line *lineHandle;
gpioMapIter = gpioMap.find(gpioId);
if (gpioMapIter == gpioMap.end()){
sif::debug << "LinuxLibgpioIF::readGpio: Unknown gpio id " << gpioId << std::endl;
return RETURN_FAILED;
sif::warning << "LinuxLibgpioIF::readGpio: Unknown GPIOD ID " << gpioId << std::endl;
return UNKNOWN_GPIO_ID;
}
if(gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
GpiodRegular* regularGpio = dynamic_cast<GpiodRegular*>(gpioMapIter->second);
if(regularGpio == nullptr) {
return GPIO_TYPE_FAILURE;
}
*gpioState = gpiod_line_get_value(regularGpio->lineHandle);
}
else {
}
lineHandle = gpioMapIter->second.lineHandle;
*gpioState = gpiod_line_get_value(lineHandle);
return RETURN_OK;
}
ReturnValue_t LinuxLibgpioIF::checkForConflicts(GpioMap& mapToAdd){
gpioId_t gpioId;
ReturnValue_t status = HasReturnvaluesIF::RETURN_OK;
ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
for(auto& gpioConfig: mapToAdd) {
gpioId = gpioConfig.first;
/* Cross check with private map */
gpioMapIter = gpioMap.find(gpioId);
if(gpioMapIter != mapToAdd.end()) {
/* An entry for this GPIO already exists. Check if configuration
* of direction is equivalent */
if (gpioConfig.second.direction != gpioMapIter->second.direction){
sif::error << "LinuxLibgpioIF::checkForConflicts: Detected conflict for GPIO " <<
gpioConfig.first << std::endl;
return RETURN_FAILED;
switch(gpioConfig.second->gpioType) {
case(gpio::GpioTypes::GPIOD_REGULAR): {
auto regularGpio = dynamic_cast<GpiodRegular*>(gpioConfig.second);
if(regularGpio == nullptr) {
return GPIO_TYPE_FAILURE;
}
/* Remove element from map to add because a entry for this GPIO
* already exists */
mapToAdd.erase(gpioConfig.first);
result = checkForConflictsRegularGpio(gpioConfig.first, regularGpio);
if(result != HasReturnvaluesIF::RETURN_OK) {
status = result;
}
break;
}
default: {
}
}
}
return RETURN_OK;
return status;
}
ReturnValue_t LinuxLibgpioIF::checkForConflictsRegularGpio(gpioId_t gpioIdToCheck,
GpiodRegular* gpioToCheck) {
/* Cross check with private map */
gpioMapIter = gpioMap.find(gpioIdToCheck);
if(gpioMapIter != gpioMap.end()) {
if(gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
auto ownRegularGpio = dynamic_cast<GpiodRegular*>(gpioMapIter->second);
if(ownRegularGpio == nullptr) {
return GPIO_TYPE_FAILURE;
}
/* An entry for this GPIO already exists. Check if configuration
* of direction is equivalent */
if (gpioToCheck->direction != ownRegularGpio->direction){
sif::error << "LinuxLibgpioIF::checkForConflicts: Detected conflict for GPIO " <<
gpioIdToCheck << std::endl;
return RETURN_FAILED;
}
}
/* Remove element from map to add because a entry for this GPIO
* already exists */
gpioMap.erase(gpioIdToCheck);
}
return HasReturnvaluesIF::RETURN_OK;
}