From 4f9797af3b4432a7e26279e039709b7cee5ca06e Mon Sep 17 00:00:00 2001 From: Steffen Gaisser Date: Mon, 28 Mar 2022 21:24:33 +0200 Subject: [PATCH 1/2] Updated CCSDS CuC Functions --- src/fsfw/timemanager/CCSDSTime.cpp | 12 ++++----- src/fsfw/timemanager/CCSDSTime.h | 27 ++++++++++++++++--- .../unit/timemanager/TestCCSDSTime.cpp | 21 +++++++++++++++ 3 files changed, 50 insertions(+), 10 deletions(-) diff --git a/src/fsfw/timemanager/CCSDSTime.cpp b/src/fsfw/timemanager/CCSDSTime.cpp index 9ebd1d79..ff20142f 100644 --- a/src/fsfw/timemanager/CCSDSTime.cpp +++ b/src/fsfw/timemanager/CCSDSTime.cpp @@ -428,7 +428,7 @@ ReturnValue_t CCSDSTime::convertFromCUC(timeval* to, const uint8_t* from, size_t from++; ReturnValue_t result = convertFromCUC(to, pField, from, foundLength, maxLength - 1); if (result == HasReturnvaluesIF::RETURN_OK) { - if (foundLength != NULL) { + if (foundLength != nullptr) { *foundLength += 1; } } @@ -588,18 +588,18 @@ ReturnValue_t CCSDSTime::convertFromCUC(timeval* to, uint8_t pField, const uint8 uint8_t nCoarse = ((pField & 0b1100) >> 2) + 1; uint8_t nFine = (pField & 0b11); size_t totalLength = nCoarse + nFine; - if (foundLength != NULL) { + if (foundLength != nullptr) { *foundLength = totalLength; } if (totalLength > maxLength) { return LENGTH_MISMATCH; } - for (int count = 0; count < nCoarse; count++) { - secs += *from << ((nCoarse * 8 - 8) * (1 + count)); + for (int count = nCoarse; count > 0; count--) { + secs += *from << (count * 8 - 8); from++; } - for (int count = 0; count < nFine; count++) { - subSeconds += *from << ((nFine * 8 - 8) * (1 + count)); + for (int count = nFine; count > 0; count--) { + subSeconds += *from << (count * 8 - 8); from++; } // Move to POSIX epoch. diff --git a/src/fsfw/timemanager/CCSDSTime.h b/src/fsfw/timemanager/CCSDSTime.h index 19c980d0..59e16a1c 100644 --- a/src/fsfw/timemanager/CCSDSTime.h +++ b/src/fsfw/timemanager/CCSDSTime.h @@ -161,18 +161,37 @@ class CCSDSTime : public HasReturnvaluesIF { */ static ReturnValue_t convertFromCcsds(timeval *to, uint8_t const *from, size_t *foundLength, size_t maxLength); - + /** + * @brief Currently unsupported conversion due to leapseconds + * + * @param to Time Of Day (UTC) + * @param from Buffer to take the CUC from + * @param length Length of buffer + * @return ReturnValue_t UNSUPPORTED_TIME_FORMAT in any case ATM + */ static ReturnValue_t convertFromCUC(Clock::TimeOfDay_t *to, uint8_t const *from, uint8_t length); - + /** + * @brief Converts from CCSDS CUC to timeval + * + * If input is CCSDS Epoch this is TAI! -> No leapsecond support. + * + * Currently, it only supports seconds + 2 Byte Subseconds (1/65536 seconds) + * + * + * @param to Timeval to write the result to + * @param from Buffer to read from + * @param foundLength Length found by this function (can be nullptr if unused) + * @param maxLength Max length of the buffer to be read + * @return ReturnValue_t - RETURN_OK if successful + * - LENGTH_MISMATCH if expected length is larger than maxLength + */ static ReturnValue_t convertFromCUC(timeval *to, uint8_t const *from, size_t *foundLength, size_t maxLength); - static ReturnValue_t convertFromCUC(timeval *to, uint8_t pField, uint8_t const *from, size_t *foundLength, size_t maxLength); static ReturnValue_t convertFromCCS(timeval *to, uint8_t const *from, size_t *foundLength, size_t maxLength); - static ReturnValue_t convertFromCCS(timeval *to, uint8_t pField, uint8_t const *from, size_t *foundLength, size_t maxLength); diff --git a/tests/src/fsfw_tests/unit/timemanager/TestCCSDSTime.cpp b/tests/src/fsfw_tests/unit/timemanager/TestCCSDSTime.cpp index a43ff8ab..e96ddfc9 100644 --- a/tests/src/fsfw_tests/unit/timemanager/TestCCSDSTime.cpp +++ b/tests/src/fsfw_tests/unit/timemanager/TestCCSDSTime.cpp @@ -179,6 +179,27 @@ TEST_CASE("CCSDSTime Tests", "[TestCCSDSTime]") { CHECK(todFromCCSDS.second == time.second); CHECK(todFromCCSDS.usecond == 123000); } + SECTION("CUC") { + timeval to; + // seconds = 0x771E960F, microseconds = 0x237 + // microseconds = 567000 + // This gives 37158.912 1/65536 seconds -> rounded to 37159 -> 0x9127 + // This results in -> 567001 us + std::array cucBuffer = { + CCSDSTime::P_FIELD_CUC_6B_CCSDS, 0x77, 0x1E, 0x96, 0x0F, 0x91, 0x27}; + size_t foundLength = 0; + auto result = CCSDSTime::convertFromCUC(&to, cucBuffer.data(), &foundLength, cucBuffer.size()); + REQUIRE(result == HasReturnvaluesIF::RETURN_OK); + REQUIRE(foundLength == 7); + REQUIRE(to.tv_sec == 1619801999); // TAI (no leap seconds) + REQUIRE(to.tv_usec == 567001); + + Clock::TimeOfDay_t tod; + result = CCSDSTime::convertFromCUC(&tod, cucBuffer.data(), cucBuffer.size()); + // This test must be changed if this is ever going to be implemented + REQUIRE(result == CCSDSTime::UNSUPPORTED_TIME_FORMAT); + } + SECTION("CCSDS Failures") { Clock::TimeOfDay_t time; time.year = 2020; From a3930dafc59bca2faf49e133b8c6f03f01ff8d4f Mon Sep 17 00:00:00 2001 From: Steffen Gaisser Date: Mon, 28 Mar 2022 21:37:25 +0200 Subject: [PATCH 2/2] Moved unused constructors --- src/fsfw/timemanager/CCSDSTime.cpp | 4 ---- src/fsfw/timemanager/CCSDSTime.h | 4 ++-- 2 files changed, 2 insertions(+), 6 deletions(-) diff --git a/src/fsfw/timemanager/CCSDSTime.cpp b/src/fsfw/timemanager/CCSDSTime.cpp index ff20142f..1f84dd03 100644 --- a/src/fsfw/timemanager/CCSDSTime.cpp +++ b/src/fsfw/timemanager/CCSDSTime.cpp @@ -6,10 +6,6 @@ #include "fsfw/FSFW.h" -CCSDSTime::CCSDSTime() {} - -CCSDSTime::~CCSDSTime() {} - ReturnValue_t CCSDSTime::convertToCcsds(Ccs_seconds* to, const Clock::TimeOfDay_t* from) { ReturnValue_t result = checkTimeOfDay(from); if (result != RETURN_OK) { diff --git a/src/fsfw/timemanager/CCSDSTime.h b/src/fsfw/timemanager/CCSDSTime.h index 59e16a1c..2a2316af 100644 --- a/src/fsfw/timemanager/CCSDSTime.h +++ b/src/fsfw/timemanager/CCSDSTime.h @@ -211,8 +211,8 @@ class CCSDSTime : public HasReturnvaluesIF { static uint32_t subsecondsToMicroseconds(uint16_t subseconds); private: - CCSDSTime(); - virtual ~CCSDSTime(); + CCSDSTime(){}; + virtual ~CCSDSTime(){}; /** * checks a ccs time stream for validity *