Merge pull request 'Only reset PTME on rate change' (#716) from only-reset-ptme-on-rate-change into main

Reviewed-on: #716
Reviewed-by: Marius Eggert <eggertm@irs.uni-stuttgart.de>

CHANGELOG.md

@@ -26,6 +26,11 @@ will consitute of a breaking change warranting a new major release:
 
 - Empty dumps (no TM in time range) will now correctly be completed immediately
 
+## Changed
+
+- PTME was always reset on submode changes. The reset will now only be performed if the actual data
+  rate changes.
+
 # [v5.1.0] 2023-06-28
 
 - `eive-tmtc` version v5.1.0

linux/ipcore/AxiPtmeConfig.cpp

@@ -16,9 +16,9 @@ AxiPtmeConfig::AxiPtmeConfig(object_id_t objectId, std::string axiUio, int mapNu
 AxiPtmeConfig::~AxiPtmeConfig() {}
 
 ReturnValue_t AxiPtmeConfig::initialize() {
-  ReturnValue_t result = returnvalue::OK;
   UioMapper uioMapper(axiUio, mapNum);
-  result = uioMapper.getMappedAdress(&baseAddress, UioMapper::Permissions::READ_WRITE);
+  ReturnValue_t result =
+      uioMapper.getMappedAdress(&baseAddress, UioMapper::Permissions::READ_WRITE);
   if (result != returnvalue::OK) {
     return result;
   }
@@ -26,8 +26,7 @@ ReturnValue_t AxiPtmeConfig::initialize() {
 }
 
 ReturnValue_t AxiPtmeConfig::writeCaduRateReg(uint8_t rateVal) {
-  ReturnValue_t result = returnvalue::OK;
-  result = mutex->lockMutex(timeoutType, mutexTimeout);
+  ReturnValue_t result = mutex->lockMutex(timeoutType, mutexTimeout);
   if (result != returnvalue::OK) {
     sif::warning << "AxiPtmeConfig::writeCaduRateReg: Failed to lock mutex" << std::endl;
     return returnvalue::FAILED;
@@ -41,6 +40,11 @@ ReturnValue_t AxiPtmeConfig::writeCaduRateReg(uint8_t rateVal) {
   return returnvalue::OK;
 }
 
+uint8_t AxiPtmeConfig::readCaduRateReg() {
+  MutexGuard mg(mutex);
+  return static_cast<uint8_t>(*(baseAddress + CADU_BITRATE_REG));
+}
+
 void AxiPtmeConfig::enableTxclockManipulator() {
   writeBit(COMMON_CONFIG_REG, true, BitPos::EN_TX_CLK_MANIPULATOR);
 }

linux/ipcore/AxiPtmeConfig.h

@@ -38,6 +38,7 @@ class AxiPtmeConfig : public SystemObject {
    *        frequency of the clock connected to the bit clock input of PTME.
    */
   ReturnValue_t writeCaduRateReg(uint8_t rateVal);
+  uint8_t readCaduRateReg();
 
   /**
    * @brief Next to functions control the tx clock manipulator component

linux/ipcore/PtmeConfig.cpp

@@ -26,6 +26,11 @@ ReturnValue_t PtmeConfig::setRate(uint32_t bitRate) {
   return axiPtmeConfig->writeCaduRateReg(static_cast<uint8_t>(rateVal));
 }
 
+uint32_t PtmeConfig::getRate() {
+  uint8_t rateReg = axiPtmeConfig->readCaduRateReg();
+  return (BIT_CLK_FREQ / (rateReg + 1));
+}
+
 void PtmeConfig::invertTxClock(bool invert) {
   if (invert) {
     axiPtmeConfig->enableTxclockInversion();

linux/ipcore/PtmeConfig.h

@@ -32,6 +32,7 @@ class PtmeConfig : public SystemObject {
    *          of the CADU clock due to the convolutional code added by the s-Band transceiver.
    */
   ReturnValue_t setRate(uint32_t bitRate);
+  uint32_t getRate();
 
   /**
    * @brief Will change the time the tx data signal is updated with respect to the tx clock

mission/com/CcsdsIpCoreHandler.cpp

@@ -246,7 +246,13 @@ ReturnValue_t CcsdsIpCoreHandler::checkModeCommand(Mode_t mode, Submode_t submod
 void CcsdsIpCoreHandler::startTransition(Mode_t mode, Submode_t submode) {
   triggerEvent(CHANGING_MODE, mode, submode);
   if (mode == HasModesIF::MODE_ON) {
-    if (this->submode != submode) {
+    uint32_t currentRate = ptmeConfig.getRate();
+    // Check whether the rate actually changes.
+    if ((this->submode != submode) and
+        (((submode == static_cast<Submode_t>(com::CcsdsSubmode::DATARATE_LOW) and
+           (currentRate != RATE_100KBPS))) or
+         ((submode == static_cast<Submode_t>(com::CcsdsSubmode::DATARATE_HIGH) and
+           (currentRate != RATE_500KBPS))))) {
       initPtmeUpdateAfterXCycles();
       updateContext.enableTransmitAfterPtmeUpdate = true;
       updateContext.updateClockRate = true;