eive-obsw/linux/devices/Max31865RtdPolling.cpp

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#include <fsfw/tasks/TaskFactory.h>
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#include <fsfw/timemanager/Stopwatch.h>
#include <fsfw_hal/linux/spi/ManualCsLockGuard.h>
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#include <linux/devices/Max31865RtdPolling.h>
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#define OBSW_RTD_AUTO_MODE 1
#if OBSW_RTD_AUTO_MODE == 1
static constexpr uint8_t BASE_CFG = (MAX31865::Bias::ON << MAX31865::CfgBitPos::BIAS_SEL) |
(MAX31865::Wires::FOUR_WIRE << MAX31865::CfgBitPos::WIRE_SEL) |
(MAX31865::ConvMode::AUTO << MAX31865::CfgBitPos::CONV_MODE);
#else
static constexpr uint8_t BASE_CFG =
(MAX31865::Bias::OFF << MAX31865::CfgBitPos::BIAS_SEL) |
(MAX31865::Wires::FOUR_WIRE << MAX31865::CfgBitPos::WIRE_SEL) |
(MAX31865::ConvMode::NORM_OFF << MAX31865::CfgBitPos::CONV_MODE);
#endif
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Max31865RtdPolling::Max31865RtdPolling(object_id_t objectId, SpiComIF* lowLevelComIF,
GpioIF* gpioIF)
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: SystemObject(objectId), rtds(EiveMax31855::NUM_RTDS), comIF(lowLevelComIF), gpioIF(gpioIF) {
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readerLock = MutexFactory::instance()->createMutex();
}
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ReturnValue_t Max31865RtdPolling::performOperation(uint8_t operationCode) {
using namespace MAX31865;
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ReturnValue_t result = returnvalue::OK;
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static_cast<void>(result);
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// Measured to take 0-1 ms in debug build
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// Stopwatch watch;
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periodicInitHandling();
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#if OBSW_RTD_AUTO_MODE == 0
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// 10 ms delay for VBIAS startup
TaskFactory::delayTask(10);
result = periodicReadReqHandling();
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if (result != returnvalue::OK) {
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return result;
}
// After requesting, 65 milliseconds delay required
TaskFactory::delayTask(65);
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#endif
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return periodicReadHandling();
}
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bool Max31865RtdPolling::rtdIsActive(uint8_t idx) {
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if (rtds[idx]->on and rtds[idx]->db.active and rtds[idx]->db.configured) {
return true;
}
return false;
}
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ReturnValue_t Max31865RtdPolling::periodicInitHandling() {
using namespace MAX31865;
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ReturnValue_t result = returnvalue::OK;
for (auto& rtd : rtds) {
if (rtd == nullptr) {
continue;
}
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bool mustPerformInitHandling = false;
bool doWriteLowThreshold = false;
bool doWriteHighThreshold = false;
{
MutexGuard mg(readerLock, LOCK_TYPE, LOCK_TIMEOUT, LOCK_CTX);
if (mg.getLockResult() != returnvalue::OK) {
sif::warning << "Max31865RtdReader::periodicInitHandling: Mutex lock failed" << std::endl;
continue;
}
mustPerformInitHandling =
(rtd->on or rtd->db.active) and not rtd->db.configured and rtd->cd.hasTimedOut();
doWriteHighThreshold = rtd->writeHighThreshold;
doWriteLowThreshold = rtd->writeLowThreshold;
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}
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if (mustPerformInitHandling) {
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// Please note that using the manual CS lock wrapper here is problematic. Might be a SPI
// or hardware specific issue where the CS needs to be pulled high and then low again
// between transfers
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result = writeCfgReg(rtd->spiCookie, BASE_CFG);
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if (result != returnvalue::OK) {
handleSpiError(rtd, result, "writeCfgReg");
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continue;
}
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if (doWriteLowThreshold) {
result = writeLowThreshold(rtd->spiCookie, rtd->lowThreshold);
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if (result != returnvalue::OK) {
handleSpiError(rtd, result, "writeLowThreshold");
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}
}
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if (doWriteHighThreshold) {
result = writeHighThreshold(rtd->spiCookie, rtd->highThreshold);
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if (result != returnvalue::OK) {
handleSpiError(rtd, result, "writeHighThreshold");
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}
}
result = clearFaultStatus(rtd->spiCookie);
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if (result != returnvalue::OK) {
handleSpiError(rtd, result, "clearFaultStatus");
}
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MutexGuard mg(readerLock, LOCK_TYPE, LOCK_TIMEOUT, LOCK_CTX);
rtd->db.configured = true;
rtd->db.active = true;
}
}
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return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::periodicReadReqHandling() {
using namespace MAX31865;
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updateActiveRtdsArray();
// Now request one shot config for all active RTDs
for (auto& rtd : rtds) {
if (rtd == nullptr) {
continue;
}
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if (activeRtdsArray[rtd->idx]) {
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ReturnValue_t result = writeCfgReg(rtd->spiCookie, BASE_CFG | (1 << CfgBitPos::ONE_SHOT));
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if (result != returnvalue::OK) {
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handleSpiError(rtd, result, "writeCfgReg");
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// Release mutex ASAP
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return returnvalue::FAILED;
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}
}
}
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return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::periodicReadHandling() {
using namespace MAX31865;
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auto result = returnvalue::OK;
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updateActiveRtdsArray();
// Now read the RTD values
for (auto& rtd : rtds) {
if (rtd == nullptr) {
continue;
}
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if (activeRtdsArray[rtd->idx]) {
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// Please note that using the manual CS lock wrapper here is problematic. Might be a SPI
// or hardware specific issue where the CS needs to be pulled high and then low again
// between transfers
uint16_t rtdVal = 0;
bool faultBitSet = false;
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result = writeCfgReg(rtd->spiCookie, BASE_CFG);
if (result != returnvalue::OK) {
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handleSpiError(rtd, result, "writeCfgReg");
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continue;
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}
result = readRtdVal(rtd->spiCookie, rtdVal, faultBitSet);
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// sif::debug << "RTD Val: " << rtdVal << std::endl;
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if (result != returnvalue::OK) {
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handleSpiError(rtd, result, "readRtdVal");
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continue;
}
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MutexGuard mg(readerLock, LOCK_TYPE, LOCK_TIMEOUT, LOCK_CTX);
if (faultBitSet) {
rtd->db.faultBitSet = faultBitSet;
}
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rtd->db.adcCode = rtdVal;
}
}
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#if OBSW_RTD_AUTO_MODE == 0
for (auto& rtd : rtds) {
if (rtd == nullptr) {
continue;
}
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// Even if a device was made inactive, turn off the bias here. If it was turned off, not
// necessary anymore..
if (rtd->on) {
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result = writeBiasSel(Bias::OFF, rtd->spiCookie, BASE_CFG);
}
}
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#endif
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return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::initializeInterface(CookieIF* cookie) {
if (cookie == nullptr) {
throw std::invalid_argument("Invalid MAX31865 Reader Cookie");
}
auto* rtdCookie = dynamic_cast<Max31865ReaderCookie*>(cookie);
ReturnValue_t result = comIF->initializeInterface(rtdCookie->spiCookie);
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if (result != returnvalue::OK) {
return result;
}
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if (rtdCookie->idx > EiveMax31855::NUM_RTDS) {
throw std::invalid_argument("Invalid RTD index");
}
rtds[rtdCookie->idx] = rtdCookie;
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MutexGuard mg(readerLock, LOCK_TYPE, LOCK_TIMEOUT, LOCK_CTX);
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if (dbLen == 0) {
dbLen = rtdCookie->db.getSerializedSize();
}
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return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::sendMessage(CookieIF* cookie, const uint8_t* sendData,
size_t sendLen) {
if (cookie == nullptr) {
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return returnvalue::FAILED;
}
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auto* rtdCookie = dynamic_cast<Max31865ReaderCookie*>(cookie);
if (rtdCookie == nullptr) {
return returnvalue::FAILED;
}
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// Empty command.. don't fail for now
if (sendLen < 1) {
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return returnvalue::OK;
}
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MutexGuard mg(readerLock, LOCK_TYPE, LOCK_TIMEOUT, LOCK_CTX);
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if (mg.getLockResult() != returnvalue::OK) {
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sif::warning << "Max31865RtdReader::sendMessage: Mutex lock failed" << std::endl;
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return returnvalue::FAILED;
}
uint8_t cmdRaw = sendData[0];
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if (cmdRaw > EiveMax31855::RtdCommands::NUM_CMDS) {
sif::warning << "Max31865RtdReader::sendMessage: Invalid command" << std::endl;
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return returnvalue::FAILED;
}
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auto thresholdHandler = [&]() {
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rtdCookie->lowThreshold = (sendData[1] << 8) | sendData[2];
rtdCookie->highThreshold = (sendData[3] << 8) | sendData[4];
rtdCookie->writeLowThreshold = true;
rtdCookie->writeHighThreshold = true;
};
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auto cmd = static_cast<EiveMax31855::RtdCommands>(sendData[0]);
switch (cmd) {
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case (EiveMax31855::RtdCommands::ON): {
if (not rtdCookie->on) {
rtdCookie->cd.setTimeout(MAX31865::WARMUP_MS);
rtdCookie->on = true;
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rtdCookie->db.active = false;
rtdCookie->db.configured = false;
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if (sendLen == 5) {
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thresholdHandler();
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}
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}
break;
}
case (EiveMax31855::RtdCommands::ACTIVE): {
if (not rtdCookie->on) {
rtdCookie->cd.setTimeout(MAX31865::WARMUP_MS);
rtdCookie->on = true;
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rtdCookie->db.active = true;
rtdCookie->db.configured = false;
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} else {
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rtdCookie->db.active = true;
}
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if (sendLen == 5) {
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thresholdHandler();
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}
break;
}
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case (EiveMax31855::RtdCommands::OFF): {
rtdCookie->on = false;
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rtdCookie->db.active = false;
rtdCookie->db.configured = false;
break;
}
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case (EiveMax31855::RtdCommands::HIGH_TRESHOLD): {
if (sendLen == 3) {
rtdCookie->highThreshold = (sendData[1] << 8) | sendData[2];
rtdCookie->writeHighThreshold = true;
} else {
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return returnvalue::FAILED;
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}
break;
}
case (EiveMax31855::RtdCommands::LOW_THRESHOLD): {
if (sendLen == 3) {
rtdCookie->lowThreshold = (sendData[1] << 8) | sendData[2];
rtdCookie->writeLowThreshold = true;
} else {
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return returnvalue::FAILED;
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}
break;
}
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case (EiveMax31855::RtdCommands::CFG): {
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ReturnValue_t result = writeCfgReg(rtdCookie->spiCookie, BASE_CFG);
if (result != returnvalue::OK) {
handleSpiError(rtdCookie, result, "writeCfgReg");
}
break;
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}
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default: {
// TODO: Only implement if needed
break;
}
}
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return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::getSendSuccess(CookieIF* cookie) { return returnvalue::OK; }
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ReturnValue_t Max31865RtdPolling::requestReceiveMessage(CookieIF* cookie, size_t requestLen) {
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return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::readReceivedMessage(CookieIF* cookie, uint8_t** buffer,
size_t* size) {
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auto* rtdCookie = dynamic_cast<Max31865ReaderCookie*>(cookie);
if (rtdCookie == nullptr) {
return returnvalue::FAILED;
}
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MutexGuard mg(readerLock, LOCK_TYPE, LOCK_TIMEOUT, LOCK_CTX);
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if (mg.getLockResult() != returnvalue::OK) {
// TODO: Emit warning
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return returnvalue::FAILED;
}
uint8_t* exchangePtr = rtdCookie->exchangeBuf.data();
size_t serLen = 0;
auto result = rtdCookie->db.serialize(&exchangePtr, &serLen, rtdCookie->exchangeBuf.size(),
SerializeIF::Endianness::MACHINE);
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if (result != returnvalue::OK) {
// TODO: Emit warning
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return returnvalue::FAILED;
}
*buffer = reinterpret_cast<uint8_t*>(rtdCookie->exchangeBuf.data());
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*size = serLen;
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return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::writeCfgReg(SpiCookie* cookie, uint8_t cfg) {
using namespace MAX31865;
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return writeNToReg(cookie, CONFIG, 1, &cfg, nullptr);
}
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ReturnValue_t Max31865RtdPolling::writeBiasSel(MAX31865::Bias bias, SpiCookie* cookie,
uint8_t baseCfg) {
using namespace MAX31865;
if (bias == MAX31865::Bias::OFF) {
baseCfg &= ~(1 << CfgBitPos::BIAS_SEL);
} else {
baseCfg |= (1 << CfgBitPos::BIAS_SEL);
}
return writeCfgReg(cookie, baseCfg);
}
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ReturnValue_t Max31865RtdPolling::clearFaultStatus(SpiCookie* cookie) {
using namespace MAX31865;
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// Read back the current configuration to avoid overwriting it when clearing te fault status
uint8_t currentCfg = 0;
auto result = readCfgReg(cookie, currentCfg);
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if (result != returnvalue::OK) {
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return result;
}
// Clear bytes 5, 3 and 2 which need to be 0
currentCfg &= ~0x2C;
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currentCfg |= (1 << CfgBitPos::FAULT_STATUS_CLEAR);
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return writeCfgReg(cookie, currentCfg);
}
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ReturnValue_t Max31865RtdPolling::readCfgReg(SpiCookie* cookie, uint8_t& cfg) {
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using namespace MAX31865;
uint8_t* replyPtr = nullptr;
auto result = readNFromReg(cookie, CONFIG, 1, &replyPtr);
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if (result == returnvalue::OK) {
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cfg = replyPtr[0];
}
return result;
}
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ReturnValue_t Max31865RtdPolling::writeLowThreshold(SpiCookie* cookie, uint16_t val) {
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using namespace MAX31865;
uint8_t cmd[2] = {static_cast<uint8_t>((val >> 8) & 0xff), static_cast<uint8_t>(val & 0xff)};
return writeNToReg(cookie, LOW_THRESHOLD, 2, cmd, nullptr);
}
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ReturnValue_t Max31865RtdPolling::writeHighThreshold(SpiCookie* cookie, uint16_t val) {
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using namespace MAX31865;
uint8_t cmd[2] = {static_cast<uint8_t>((val >> 8) & 0xff), static_cast<uint8_t>(val & 0xff)};
return writeNToReg(cookie, HIGH_THRESHOLD, 2, cmd, nullptr);
}
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ReturnValue_t Max31865RtdPolling::readLowThreshold(SpiCookie* cookie, uint16_t& lowThreshold) {
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using namespace MAX31865;
uint8_t* replyPtr = nullptr;
auto result = readNFromReg(cookie, LOW_THRESHOLD, 2, &replyPtr);
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if (result == returnvalue::OK) {
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lowThreshold = (replyPtr[0] << 8) | replyPtr[1];
}
return result;
}
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ReturnValue_t Max31865RtdPolling::readHighThreshold(SpiCookie* cookie, uint16_t& highThreshold) {
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using namespace MAX31865;
uint8_t* replyPtr = nullptr;
auto result = readNFromReg(cookie, HIGH_THRESHOLD, 2, &replyPtr);
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if (result == returnvalue::OK) {
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highThreshold = (replyPtr[0] << 8) | replyPtr[1];
}
return result;
}
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ReturnValue_t Max31865RtdPolling::writeNToReg(SpiCookie* cookie, uint8_t reg, size_t n,
uint8_t* cmd, uint8_t** reply) {
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using namespace MAX31865;
if (n > cmdBuf.size() - 1) {
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return returnvalue::FAILED;
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}
cmdBuf[0] = reg | WRITE_BIT;
for (size_t idx = 0; idx < n; idx++) {
cmdBuf[idx + 1] = cmd[idx];
}
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return comIF->sendMessage(cookie, cmdBuf.data(), n + 1);
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}
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ReturnValue_t Max31865RtdPolling::readRtdVal(SpiCookie* cookie, uint16_t& val, bool& faultBitSet) {
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using namespace MAX31865;
uint8_t* replyPtr = nullptr;
auto result = readNFromReg(cookie, RTD, 2, &replyPtr);
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if (result != returnvalue::OK) {
return result;
}
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if (replyPtr[1] & 0b0000'0001) {
faultBitSet = true;
}
// Shift 1 to the right to remove fault bit
val = ((replyPtr[0] << 8) | replyPtr[1]) >> 1;
return result;
}
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ReturnValue_t Max31865RtdPolling::readNFromReg(SpiCookie* cookie, uint8_t reg, size_t n,
uint8_t** reply) {
using namespace MAX31865;
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if (n > 4) {
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return returnvalue::FAILED;
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}
// Clear write bit in any case
reg &= ~WRITE_BIT;
cmdBuf[0] = reg;
std::memset(cmdBuf.data() + 1, 0, n);
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ReturnValue_t result = comIF->sendMessage(cookie, cmdBuf.data(), n + 1);
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if (result != returnvalue::OK) {
return returnvalue::FAILED;
}
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size_t dummyLen = 0;
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uint8_t* replyPtr = nullptr;
result = comIF->readReceivedMessage(cookie, &replyPtr, &dummyLen);
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if (result != returnvalue::OK) {
return result;
}
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if (reply != nullptr) {
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*reply = replyPtr + 1;
}
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return returnvalue::OK;
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}
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ReturnValue_t Max31865RtdPolling::updateActiveRtdsArray() {
MutexGuard mg(readerLock, LOCK_TYPE, LOCK_TIMEOUT, LOCK_CTX);
if (mg.getLockResult() != returnvalue::OK) {
sif::warning << "Max31865RtdReader::periodicReadHandling: Mutex lock failed" << std::endl;
return returnvalue::FAILED;
}
for (const auto& rtd : rtds) {
activeRtdsArray[rtd->idx] = rtdIsActive(rtd->idx);
}
return returnvalue::OK;
}
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ReturnValue_t Max31865RtdPolling::handleSpiError(Max31865ReaderCookie* cookie, ReturnValue_t result,
const char* ctx) {
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cookie->db.spiErrorCount.value += 1;
sif::warning << "Max31865RtdReader::handleSpiError: " << ctx << " | Failed with result " << result
<< std::endl;
return result;
}
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ReturnValue_t Max31865RtdPolling::initialize() {
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csLock = comIF->getCsMutex();
return SystemObject::initialize();
}