Keyboard Firmware in Rust

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ࣗ࡞ΩʔϘʔυͷ  ϑΝʔϜ΢ΣΞΛ  3VTUͰॻ͘ KOBA789

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,0#" w ΫοΫύουגࣜձٕࣾज़෦σʔλج൫άϧʔϓ w ϝΠϯͷ࢓ࣄ͸େྔͷσʔλΛ͍͍ײ͡ʹ͢Δ͜ͱ  ͱ͍͏͜ͱʹͳ͍ͬͯΔ w ࣮ࡍ͸͓΋͠Ζͦ͏ͳ͜ͱΛͳΜͰ΋΍͍ͬͯΔ w ݱࡏ৽ଔ೥໨

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ࣗ࡞ΩʔϘʔυ

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࠷ۙ<͍ͭ >ਓؾͳझຯ<ཁग़య>

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https://techlife.cookpad.com/entry/2018/08/14/172130

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ฐࣾʹ΋ͨ͘͞ΜͷѪ޷Ո͕

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Ͱɺ

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https://internship.cookpad.com/2019/spring/

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Πϯλʔϯγοϓ ࣗ࡞ΩʔϘʔυίʔε

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څྉ΋Βͬͯࣗ࡞ΩʔϘʔυΛ  ΍Δ͜ͱʹͳͬͯ͠·ͬͨ

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͑Β͍ਓʮόζΒ͍ͤͨʯ Զʮ͡Ό͋ΧϦΩϡϥϜ͸աܹʹʯ

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݁Ռ

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w͸Μͩ෇͚͸΋ͪΖΜ΍Δ w؆୯ͳిࢠճ࿏΋΍Δ wϓϦϯτج൘ͷઃܭ΋΍Δ wϑΝʔϜ΢ΣΞ͸3VTUͰॻ͘

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ϑΝʔϜ΢ΣΞ͸  3VTUͰॻ͘

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1SP.JDSP https://www.switch-science.com/catalog/1623/ ࣗ࡞ΩʔϘʔυͰ͸Ұൠత

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1SP.JDSPͷੴ͸"5NFHB6 "5NFHB6͸"73

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3VTUͰ"73͸ͩΔ͍

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૊ΈࠐΈ3VTU͓͢͢Ί͸ $PSUFY.γϦʔζ "3. 3*4$7͡Όͳͯ͘͝ΊΜͳ

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௨শCMVFQJMM w 45.'$͕৐ͬͯΔ w 45.'$͸$PSUFY. w 3".,# w $16$MPDLVQUP.)[ w 'MBTI,# ࣮ࡍ͸ͳ͔ͥ,# https://wiki.stm32duino.com/index.php?title=File:STM32_Blue_Pill_perspective.jpg

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௨শCMVFQJMM ͓͍͘Βͩͱࢥ͍·͔͢  https://wiki.stm32duino.com/index.php?title=File:STM32_Blue_Pill_perspective.jpg

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௨শCMVFQJMM https://wiki.stm32duino.com/index.php?title=File:STM32_Blue_Pill_perspective.jpg

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։ൃͷͨΊͷπʔϧ

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͍͍ͩͨ  5IF&NCFEEFE3VTU#PPL  ʹॻ͍ͯ͋ΔͷͰলུ

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ͱ͘ʹศརͳ΋ͷΛ঺հ

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#MBDL.BHJD1SPCF w 1SPHSBNNFS%FCVHHFS w ιϑτ΢ΣΞ͸Φʔϓϯιʔε w ϋʔυ΢ΣΞ͸CMVFQJMMͳͲ͕࢖͑Δ w ࢲ͸CMBDLQJMMΛ࢖ͬͯ࡞ͬͨ w ϑϦεΫέʔεͰ͍͍ײ͡

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cargo runͰ͖Δ ຊ೔ೋ౓໨ Demo

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HEC࢖͑Δ ϒϨʔΫϙΠϯτషΕΔ ϝϞϦμϯϓͰ͖Δ

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println!Ͱ͖Δ Demo

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cortex_m_semihosting

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૊ΈࠐΈϓϩάϥϛϯάͰ  ආ͚ΒΕͳ͍΋ͷ

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पลػثϖϦϑΣϥϧ

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ϖϦϑΣϥϧͷػೳݺͼग़͠  ϨδελΞΫηε

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ΞηϯϒϦ /P

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JO$ ϝʔΧʔ͕ϥΠϒϥϦΛఏڙ JO3VTU ศརΫϨʔτ͕͋Δ

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TWESVTU wΈΜͳ͍͖ͩ͢ίʔυδΣωϨʔλ wσόΠεఆٛϑΝΠϧTWE͔Β wϨδελΞΫηεؔ਺ͷίʔυΛు͘

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TUNG wTWESVTUͰు͔ΕͨίʔυΛ w͍͍ײ͡ʹௐ੔ͨ͠ΫϨʔτ wTUNGͰ࢖͑Δ

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-νΧͱ͔͸Ͱ͖Δ

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͔͠͠ɺ

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ΩʔϘʔυͳͷͰ 64#)*%Λ  ͠Ό΂Βͳ͍ͱ͍͚ͳ͍

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ϨδελΛ਺ݸୟ͘͘Β͍Ͱ͸ 64#͸͠Ό΂Εͳ͍

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෼ް͍64#ͷ࢓༷ॻͱ  ΍΍ް͍64#)*%ͷ࢓༷ॻͱ  Ϋι෼ް͍45.ͷ࢓༷ॻΛಡΜͰ ద੾ͳϨδελɾϝϞϦΛ  ͨ͘͞ΜಡΈॻ͖͢ΔίʔυΛॻ͘ඞཁΞϦ

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࣮૷͠·ͨ͠

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64#)*%࣮૷΍Γ͔ͨ w 64#ͷ࢓༷ΛಡΉ w 64#)*%$MBTTͷ࢓༷ΛಡΉ w 45.'ͷϚχϡΞϧΛಡΉ w ͕ۭ݀͘΄ͲಡΉ w MJCPQFODNͷίʔυΛࢀߟʹ͢Δ w 3VTUͰॻ͘ˠϩδΞφͰݟΔˠ௚͢ w ҎԼ܁Γฦ͠

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Զ͸Ӧۀ೔͘Β͍͔͔ͬͨ

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͜͜ͰϩδΞφ Demo

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3VTUؔ܎ͳ͍ؾ͕͢Δͳ

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ίʔυยΛͪΐͬͱ঺հ

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64#ͷ௨৴Ͱ࢖͏όοϑΝ

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https://www.stmcu.jp/design/document/reference_manual/51428/ IUUQTXXXTUNDVKQEFTJHOEPDVNFOUSFGFSFODF@NBOVBM

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͜ΕΛ͍͍ײ͡ʹϞσϦϯά

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VolatileCell

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VolatileCell w ϝϞϦ΁ͷWPMBUJMFΞΫηεΛ w ͍͍ײ͡ʹ͢ΔϥΠϒϥϦ w std::ptr::read_volatileͱ͔͸unsafeͰࠔΔ

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MJCPQFODNΛ  ࢀߟʹ͸͕ͨ͠ʜʜ

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3VTUಛ༗ͷ೉͠͞ w ϓϩτίϧͷ࣮૷͸εςʔτϚγϯʹͳΓ͕ͪ w εςʔτΛܕ҆શʹ͢Δͷ͸ͪΐͬͱίπ͕͍Δ w งғؾͰߏ଄࡞Δͱ్தͰ٧Ή w ݩͷ࣮૷ΛಡΜͰ $ͷࡶ͞ʹΩϨΔ