BlackMark
bd604ec288
43fc479 -> aec9955. The mega328P does not move at 1480 B - it drives the RTC from the TWI block, which neither change touches. The tiny85 has no TWI, so dev::i2c resolves to the bit-banged master there and takes both: cb40a13, the bit period 1238 -> 1262 (+24) 943ffbe, one call shape over every master 1262 -> 1316 (+54) The first is a bug being paid for. software_master delayed a fixed quarter period and let its own instructions make up the rest of the bit, so the rate on the wire followed the inliner; each bit now delays a low and a high phase net of what that phase already spends. The DS3231 is a 400 kHz part and this example asks for 100, so nothing here was out of spec - the bytes buy a rate that no longer moves when the image does. The second is a trade, and it is worth writing down which way it went. The shared ladder is smaller than the two it replaced - run_transfer is 232 B against read_regs 162 + write_regs 102 + stop 30 - but the call-site thunks that marshal spans into it cost 116 B where the specialised ladders were inlined, so a driver making both calls nets +54. Filed upstream with these numbers rather than worked around here: which way the trade falls is a property of the consumer's mix, and that is the library owner's call. Size re-recorded in the two places that state it. Four presets green, cross-mode identity held on both chips. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
22 lines
830 B
CMake
22 lines
830 B
CMake
libavr_format_test()
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# The example's size is stated in the README, per chip, and a library advance
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# that moves it silently is what this catches.
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if(LIBAVR_MCU STREQUAL "atmega328p")
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libavr_size_claim_test(clock 1480)
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elseif(LIBAVR_MCU STREQUAL "attiny85")
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libavr_size_claim_test(clock 1316)
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endif()
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# The README says the two modes emit the same image, and only a tree with
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# both built can say whether they do.
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libavr_mode_identity_test(clock)
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# The battery is a compile: a static_assert that fails is the failure. It is a
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# target rather than only a ctest so a plain build catches a regression too.
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add_library(consteval_tests OBJECT consteval.cpp)
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target_link_libraries(consteval_tests PRIVATE ds3231)
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add_test(NAME ds3231.consteval
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COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target consteval_tests)
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