eive-obsw/linux/ipcore/PapbVcInterface.cpp

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#include <fsfw_hal/linux/uio/UioMapper.h>
#include <linux/ipcore/PapbVcInterface.h>
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#include <unistd.h>
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#include <ctime>
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#include "fsfw/serviceinterface/ServiceInterface.h"
PapbVcInterface::PapbVcInterface(LinuxLibgpioIF* gpioComIF, gpioId_t papbBusyId,
gpioId_t papbEmptyId, std::string uioFile, int mapNum)
: gpioComIF(gpioComIF),
papbBusyId(papbBusyId),
papbEmptyId(papbEmptyId),
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uioFile(std::move(uioFile)),
mapNum(mapNum) {}
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PapbVcInterface::~PapbVcInterface() {}
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ReturnValue_t PapbVcInterface::initialize() {
UioMapper uioMapper(uioFile, mapNum);
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uint32_t* baseReg;
ReturnValue_t result = uioMapper.getMappedAdress(&baseReg, UioMapper::Permissions::WRITE_ONLY);
if (result != returnvalue::OK) {
return result;
}
vcBaseReg = baseReg;
return returnvalue::OK;
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}
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ReturnValue_t PapbVcInterface::write(const uint8_t* data, size_t size) {
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if (pollPapbBusySignal(0) == returnvalue::OK) {
startPacketTransfer();
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} else {
return DirectTmSinkIF::IS_BUSY;
}
for (size_t idx = 0; idx < size; idx++) {
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if (pollPapbBusySignal(3) == returnvalue::OK) {
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*(vcBaseReg + DATA_REG_OFFSET) = static_cast<uint32_t>(data[idx]);
} else {
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abortPacketTransfer();
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return returnvalue::FAILED;
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}
}
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if (pollPapbBusySignal(3) == returnvalue::OK) {
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completePacketTransfer();
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} else {
abortPacketTransfer();
return returnvalue::FAILED;
}
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return returnvalue::OK;
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}
void PapbVcInterface::startPacketTransfer() { *vcBaseReg = CONFIG_START; }
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void PapbVcInterface::completePacketTransfer() { *vcBaseReg = CONFIG_END; }
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ReturnValue_t PapbVcInterface::pollPapbBusySignal(uint32_t maxPollRetries) const {
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gpio::Levels papbBusyState = gpio::Levels::LOW;
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ReturnValue_t result;
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uint32_t busyIdx = 0;
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nextDelay.tv_nsec = 1000;
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while (true) {
/** Check if PAPB interface is ready to receive data */
result = gpioComIF->readGpio(papbBusyId, papbBusyState);
if (result != returnvalue::OK) {
sif::warning << "PapbVcInterface::pollPapbBusySignal: Failed to read papb busy signal"
<< std::endl;
return returnvalue::FAILED;
}
if (papbBusyState == gpio::Levels::HIGH) {
return returnvalue::OK;
}
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busyIdx++;
if (busyIdx >= maxPollRetries) {
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return PAPB_BUSY;
}
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// Ignore signal handling here for now.
nanosleep(&nextDelay, &remDelay);
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// Adaptive delay.
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if (nextDelay.tv_nsec * 2 <= MAX_DELAY_PAPB_POLLING_NS) {
nextDelay.tv_nsec *= 2;
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}
}
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return returnvalue::OK;
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}
void PapbVcInterface::isVcInterfaceBufferEmpty() {
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ReturnValue_t result = returnvalue::OK;
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gpio::Levels papbEmptyState = gpio::Levels::HIGH;
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result = gpioComIF->readGpio(papbEmptyId, papbEmptyState);
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if (result != returnvalue::OK) {
sif::warning << "PapbVcInterface::isVcInterfaceBufferEmpty: Failed to read papb empty signal"
<< std::endl;
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return;
}
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if (papbEmptyState == gpio::Levels::HIGH) {
sif::debug << "PapbVcInterface::isVcInterfaceBufferEmpty: Buffer is empty" << std::endl;
} else {
sif::debug << "PapbVcInterface::isVcInterfaceBufferEmpty: Buffer is not empty" << std::endl;
}
return;
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}
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bool PapbVcInterface::isBusy() const { return pollPapbBusySignal(0) == PAPB_BUSY; }
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void PapbVcInterface::cancelTransfer() { abortPacketTransfer(); }
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ReturnValue_t PapbVcInterface::sendTestFrame() {
/** Size of one complete transfer frame data field amounts to 1105 bytes */
uint8_t testPacket[1105];
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/** Fill one test packet */
for (int idx = 0; idx < 1105; idx++) {
testPacket[idx] = static_cast<uint8_t>(idx & 0xFF);
}
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ReturnValue_t result = write(testPacket, 1105);
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if (result != returnvalue::OK) {
return result;
}
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return returnvalue::OK;
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}
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void PapbVcInterface::abortPacketTransfer() { *vcBaseReg = CONFIG_ABORT; }