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Porting PicoRuby to Another Microcontroller: ESP32

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April 18, 2025
Technology
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Porting PicoRuby to Another Microcontroller: ESP32

RubyKaigi 2025 Day.3
https://rubykaigi.org/2025/presentations/Y_uuu.html#day3
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Y_uuu

April 18, 2025
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Transcript

  1. "QSJM 3VCZ,BJHJ :VIFJ0LB[BLJ !:@VVV Porting PicoRuby to Another Microcontroller: ESP32

  2. self.inspect w :VIFJ0LB[BLJ w !:@VVV 9 !ZVVVOFU #MVF4LZ  w

    !ZVVV (JU)VC  w *P5$MPVE&OHJOFFSBU'VTJD$P -UE w .FOUFSBU'KPSE#PPU$BNQ 2

  3. PicoRuby 3

  4. PicoRuby w 5IFTNBMMFTU3VCZJNQMFNFOUBUJPOEFTJHOFEUPSVOPO NJDSPDPOUSPMMFST w &OBCMFTSVOOJOH3VCZPONJDSPDPOUSPMMFSCPBSETTVDIBTUIF 3BTQCFSSZ1J1JDP 4

  5. Raspberry Pi Pico w "NJDSPDPOUSPMMFSCPBSE EFWFMPQFECZUIF3BTQCFSSZ 1J'PVOEBUJPO w $BOCFQSPHSBNNFEVTJOH 1ZUIPO

    .JDSP1ZUIPO BOE$ $  5

  6. R2P2 (Ruby Rapid Portable Platform) w "TIFMMTZTUFNXJUI1JDP3VCZFNCFEEFEUIBUSVOTPO NJDSPDPOUSPMMFST w 8PSLTPOUIF3BTQCFSSZ1J1JDP

    6

  7. Question: Do we need a Raspberry Pi Pico to try

    PicoRuby? 7

  8. Question: Do we need a Raspberry Pi Pico to try

    PicoRuby? w /PUOFDFTTBSJMZ 8

  9. PicoRuby is portable w *UJTCVJMUUPTVQQPSUPQFSBUJPOPOEJ ff FSFOUNJDSPDPOUSPMMFST w 'JMFTBOEEJSFDUPSJFTBSFFYQMJDJUMZTFQBSBUFEUPIBOEMF NJDSPDPOUSPMMFSTQFDJ

    fi DEJ ff FSFODFT w &BTZQPSUJOHBMMPXTUIFFYJTUJOHFDPTZTUFNUPCFMFWFSBHFEBDSPTT EJ ff FSFOUNJDSPDPOUSPMMFST 9

  10. Porting PicoRuby is still a work in progress w 5IFSFBSFOPUNBOZ

    NJDSPDPOUSPMMFSTUIBUDBO FBTJMZSVO1JDP3VCZ w 5IFDSFBUPSPG1JDP3VCZJT BMTPFBHFSUPTFFNPSFQPSUT 10 IUUQTQJDPSVCZHJUIVCJPDPOUSJCVUJPOIUNM

  11. Porting PicoRuby is still a work in progress w 5IFSFBSFOPUNBOZ

    NJDSPDPOUSPMMFSTUIBUDBO FBTJMZSVO1JDP3VCZ w 5IFDSFBUPSPG1JDP3VCZJT BMTPFBHFSUPTFFNPSFQPSUT 11 1PSUJOH "TPG 1JDP3VCZTVQQPSUTPOMZUIF31 3BTQCFSSZ1J1JDP *U XPVMECFBTJHOJ fi DBOUVOEFSUBLJOHUPQPSUJUUPPUIFS.$6TMJLFUIF O3' 45. BOE&41*GZPVBSFJOUFSFTUFEJODPOUSJCVUJOHUPB QPSUJOH QMFBTFWJTJUUIFSFQPTJUPSZ IUUQTQJDPSVCZHJUIVCJPDPOUSJCVUJPOIUNM

  12. ESP32 12

  13. ESP32 w "MPXDPTU MPXQPXFS NJDSPDPOUSPMMFSNPEVMF EFWFMPQFECZ&TQSFTTJG 4ZTUFNT w 8JEFMZVTFEJOWBSJPVT EFWJDFT

    JODMVEJOH.4UBDL w 4VQQPSUTXJSFMFTT DPNNVOJDBUJPOTVDIBT8J'J BOE#MVFUPPUI 13

  14. My device1: M5Stamp C3 Mate w &RVJQQFEXJUI&41$  POFPGUIF&41TFSJFT NJDSPDPOUSPMMFSNPEVMFT

    w #BTFEPO3*4$7 BSDIJUFDUVSF w &YUSFNFMZTNBMMBOE B ff PSEBCMF 14

  15. My device2: ESP32-DevKitC w &41EFWFMPQNFOUCPBSE EFWFMPQFEBOENBSLFUFECZ &TQSFTTJG4ZTUFNT w #BTFEPO9UFOTB BSDIJUFDUVSF

    15

  16. Let's start porting!

  17. Steps for Porting 📝  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU

     1PSUBEEJUJPOBMNSCHFNT 17

  18. Steps for Porting 📝  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU

     1PSUBEEJUJPOBMNSCHFNT 18 /FYU6Q

  19. Introduction to Compilation, Linking, and Archiving 19

  20. Introduction to Compilation, Linking, and Archiving 20 $PNQJMF

  21. Introduction to Compilation, Linking, and Archiving 21 -JOL

  22. Introduction to Compilation, Linking, and Archiving 22 "SDIJWF

  23. Introduction to Cross-Compilation 23 'PSY 'PSY 'PSY 'PSY 'PSY 'PSY

  24. Introduction to Cross-Compilation 24 'PS9UFOTB3*4$7 'PS9UFOTB3*4$7 'PS9UFOTB3*4$7 'PS9UFOTB3*4$7 'PS9UFOTB3*4$7 'PS9UFOTB3*4$7

  25. File Structure of PicoRuby/R2P2 25

  26. File Structure of PicoRuby/R2P2 26

  27. File Structure of PicoRuby/R2P2 27

  28. File Structure of PicoRuby/R2P2 28

  29. File Structure of PicoRuby/R2P2 29

  30. File Structure of PicoRuby/R2P2 30

  31. File Structure of PicoRuby/R2P2 31 -FU`TDSFBUFUIJT fi MF

  32. ESP-IDF w &41*%'JTBEFWFMPQNFOU GSBNFXPSLGPS&41  QVCMJTIFECZ&TQSFTTJG 4ZTUFNT w #ZGPMMPXJOHUIFP ff

    i DJBM EPDVNFOUBUJPOGPSTFUVQ ZPV DBOVTFDPNQJMFST MJOLFST  BOEBSDIJWFSTGPSCPUI3*4$ 7BOE9UFOTB 32 IUUQTEPDTFTQSFTTJGDPNQSPKFDUTFTQJEGFOW FTQHFUTUBSUFEMJOVYNBDPTTFUVQIUNM

  33. Writing build_config w 5IFCVJME@DPO fi HEJSFDUPSZJO 1JDP3VCZDPOUBJOT fi MFTGPS CVJMEJOHPOWBSJPVT

    NJDSPDPOUSPMMFSTBOE FOWJSPONFOUT w 5IFTF fi MFTBSFBMTPXSJUUFOJO 3VCZ 33 TLJQQFEʜ

  34. Writing build_config 34 .3VCZ$SPTT#VJMEOFX FTQ EPcDPOGc DPOGUPPMDIBJO HDD  DPOGDDDPNNBOEYUFOTBFTQFMGHDD

    DPOGMJOLFSDPNNBOEYUFOTBFTQFMGME DPOGBSDIJWFSDPNNBOEYUFOTBFTQFMGBS DPOGDDIPTU@DPNNBOEHDD DPOGQJDPSVCZ BMMPD@MJCDGBMTF  FOE QJDPSVCZCVJME@DPO fi HYUFOTBFTQSC 4FUUJOH6Q$PNQJMFS -JOLFS BOE "SDIJWFS$PNNBOETGPS9UFOTB "EE$POTUBOUTBOE0UIFS0QUJPOT BT/FFEFE

  35. Writing build_config 35 .3VCZ$SPTT#VJMEOFX FTQ EPcDPOGc DPOGUPPMDIBJO HDD  DPOGDDDPNNBOESJTDWFTQFMGHDD

    DPOGMJOLFSDPNNBOESJTDWFTQFMGME DPOGBSDIJWFSDPNNBOESJTDWFTQFMGBS DPOGDDIPTU@DPNNBOEHDD DPOGQJDPSVCZ BMMPD@MJCDGBMTF  FOE QJDPSVCZCVJME@DPO fi HSJTDWFTQSC

  36. rake w 4QFDJGZUIFCVJME@DPO fi HOBNFVTJOHUIF.36#:@$0/'*( FOWJSPONFOUWBSJBCMF w #VJMEVTJOHUIFSBLFDPNNBOE 36 GPS9UFOTB

    .36#:@$0/'*(YUFOTBFTQSBLF GPS3*4$7 .36#:@$0/'*(SJTDWFTQSBLF

  37. rake w 8FDBOTFFUIBUMJCNSVCZBIBTCFFOHFOFSBUFE 37 MTCVJMEFTQMJC MJCNSVCZBMJCNSVCZ@DPSFB

  38. Steps for Porting 📝  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU

     1PSUBEEJUJPOBMNSCHFNT 38 +VTU5BMLFE

  39. Steps for Porting 📝  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU

     1PSUBEEJUJPOBMNSCHFNT 39 /FYU6Q

  40. File Structure of PicoRuby/R2P2 40 $SFBUFE

  41. File Structure of PicoRuby/R2P2 41 "OEDSFBUFUIJT fi MF -FU`TDSFBUFUIJTQSPKFDU

  42. Creating an ESP-IDF Project w 'PMMPXTUIFTBNFQSPDFEVSF BTEFWFMPQJOHXJUI$ w *OBNFEUIJTQSPKFDU31 &41

    42 IUUQTEPDTFTQSFTTJGDPNQSPKFDUTFTQJEGFOWFTQ HFUTUBSUFEMJOVYNBDPTTFUVQIUNMTUBSUBQSPKFDU

  43. Writing main.c 43 JODMVEFNSCNBJO@UBTLD ʜ 5IJTGVODUJPOJTUIFFOUSZQPJOU WPJEBQQ@NBJO WPJE  \

    NSCD@JOJU IFBQ@QPPM )&"1@4*;&  NSCD@UDC NBJO@UDCNSCD@DSFBUF@UBTL NBJO@UBTL   NSCD@TFU@UBTL@OBNF NBJO@UDC NBJO@UBTL  NSCD@SVO  ^ 31&41NBJONBJOD *OJUJBMJ[BUJPO 1BTTJOHUIF)FBQ .FNPSZ"SFB  3VOUIF7. $SFBUFBOFYFDVUJPODPOUFYU DBMMFEBUBTL

  44. Writing main.c 44 JODMVEFNSCNBJO@UBTLD ʜ 5IJTGVODUJPOJTUIFFOUSZQPJOU WPJEBQQ@NBJO WPJE  \

    NSCD@JOJU IFBQ@QPPM )&"1@4*;&  NSCD@UDC NBJO@UDCNSCD@DSFBUF@UBTL NBJO@UBTL   NSCD@TFU@UBTL@OBNF NBJO@UDC NBJO@UBTL  NSCD@SVO  ^ 31&41NBJONBJOD 8IBUEPUIFTFDPEFTEP 

  45. Binary for the PicoRuby VM 45 QVUT)FMMPXPSME NSCMJCNBJO@UBTLSC JODMVEFTUEJOUI JGEFG@@DQMVTQMVT

    FYUFSO FOEJG DPOTUVJOU@UNBJO@UBTL<>\ Y Y Y Y Y Y Y Y Y Y Y YE Y Y YE YC  ʜ ^ NSCNBJO@UBTLD QJDPSCD#NBJO@UBTLPNSCNBJO@UBTLDMJCNBJO@UBTLSC *OQVU 0VUQVU

  46. Writing CMakeLists.txt 46 TFU 1*$036#:@%*3\$0.10/&/5@%*3^QJDPSVCZ  TFU -*#.36#:@'*-&\1*$036#:@%*3^CVJMEFTQMJCMJCNSVCZB  BEE@QSFCVJMU@MJCSBSZ

    MJCNSVCZ\-*#.36#:@'*-&^3&26*3&4\$0.10/&/5@/".&^  UBSHFU@MJOL@MJCSBSJFT \$0.10/&/5@-*#^13*7"5&MJCNSVCZ  UBSHFU@JODMVEF@EJSFDUPSJFT  \$0.10/&/5@-*#^ 13*7"5& \$0.10/&/5@%*3^QJDPSVCZCVJMESFQPTFTQNSVCZDPNQJMFSJODMVEF \$0.10/&/5@%*3^QJDPSVCZCVJMESFQPTFTQNSVCZDPNQJMFSMJCQSJTNJODMVEF \$0.10/&/5@%*3^QJDPSVCZCVJMEFTQNSCHFNT 31&41DPNQPOFOUTQJDPSVCZFTQ$.BLF-JTUTUYU 3FGFSFODJOHMJCNSVCZB "EEMJCSBSJFTUPMJOL

  47. Build with idf.py 47 JEGQZCVJME 1SPKFDUCVJMEDPNQMFUF5P fl BTI SVO JEGQZ

    fl BTI PS JEGQZQ1035 fl BTI PS QZUIPONFTQUPPMDIJQFTQCCFGPSFEFGBVMU@SFTFUBGUFSIBSE@SFTFUXSJUF@ fl BTI fl BTI@NPEFEJP  fl BTI@TJ[F.# fl BTI@GSFRNYCVJMECPPUMPBEFSCPPUMPBEFSCJOYCVJMEQBSUJUJPO@UBCMFQBSUJUJPO UBCMFCJOYCVJME31&41CJOYCVJMETUPSBHFCJO PSGSPNUIF6TFSTZVIFJHIRHJUIVCDPNQJDPSVCZ31&41CVJMEEJSFDUPSZ QZUIPONFTQUPPMDIJQFTQCCFGPSFEFGBVMU@SFTFUBGUFSIBSE@SFTFUXSJUF@ fl BTI! fl BTI@BSHT $PNQMFUF

  48. Steps for Porting 📝  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU

     1PSUBEEJUJPOBMNSCHFNT 48 +VTU5BMLFE

  49. Steps for Porting 📝  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU

     1PSUBEEJUJPOBMNSCHFNT 49 /FYU6Q

  50. w 5SBDFUIF1JDP3VCZTPVSDFDPEFTUBSUJOHGSPNUIFQVUTNFUIPE BWBJMBCMFJO3VCZ w &WFOUVBMMZ JUMFBETUPUIFQJDPSVCZNBDIJOFNSCHFN 50 Exploring the Call

    Tree

  51. w 5SBDFUIF1JDP3VCZTPVSDFDPEFTUBSUJOHGSPNUIFQVUTNFUIPE BWBJMBCMFJO3VCZ w &WFOUVBMMZ JUMFBETUPUIFQJDPSVCZNBDIJOFNSCHFN 51 Exploring the Call

    Tree

  52. Modifying build_config w *O1JDP3VCZ NSCHFNTBSF BEEFEUISPVHICVJME@DPO fi H w "EEQJDPSVCZNBDIJOF

    52 .3VCZ$SPTT#VJMEOFX FTQ EPcDPOGc  DPOGHFNDPSFlQJDPSVCZNBDIJOF DPOGQJDPSVCZ BMMPD@MJCDGBMTF  FOE QJDPSVCZCVJME@DPO fi HYUFOTBFTQSC BOESJTDWFTQSC

  53. File Structure of PicoRuby/R2P2 53

  54. File Structure of PicoRuby/R2P2 54

  55. File Structure of PicoRuby/R2P2 55

  56. File Structure of PicoRuby/R2P2 56 'PS3BTQCFSSZ1J1JDP

  57. File Structure of PicoRuby/R2P2 57 'PS3BTQCFSSZ1J1JDP

  58. File Structure of PicoRuby/R2P2 58 4IPVMEDSFBUFUIJT fi MFBOE TXJUDIUIFDPNQJMFUBSHFU 'PS&41

  59. Example implementation of hal_write in machine.c 59 JOU IBM@XSJUF JOUGE

    DPOTUWPJE CVG JOUOCZUFT  \ UVE@DED@XSJUF CVG OCZUFT  JOUMFOUVE@DED@XSJUF@ fl VTI  SFUVSOMFO ^ QJDPSVCZNBDIJOFQPSUTSQNBDIJOFD JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ TIPVMEXSJUFDPEFT ^ QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD w 5BLFTUIFGPMMPXJOHBSHVNFOUT w 0VUQVU fi MFEFTDSJQUPS w 0VUQVUEBUB w /VNCFSPGCZUFTUPXSJUF w .VTUSFUVSOUIFOVNCFSPG CZUFTXSJUUFO w )PXTIPVMEJUCFJNQMFNFOUFE

  60. Example implementation of hal_write in machine.c 60 JOU IBM@XSJUF JOUGE

    DPOTUWPJE CVG JOUOCZUFT  \ UVE@DED@XSJUF CVG OCZUFT  JOUMFOUVE@DED@XSJUF@ fl VTI  SFUVSOMFO ^ QJDPSVCZNBDIJOFQPSUTSQNBDIJOFD JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ TIPVMEXSJUFDPEFT ^ QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD w UVE@DED@XSJUF JTBGVODUJPO QSPWJEFECZ5JOZ64# w *UJTOPUJODMVEFEJO&41*%' CZEFGBVMU w *O&41*%' TUEJPIDBOCF VTFE BOETUBOEBSEPVUQVUJT EJSFDUFEUPTFSJBM DPNNVOJDBUJPO

  61. JODMVEFTUEJPI JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ GPS

    JOUJJOCZUFTJ \ QVUDIBS DIBS CVG <J>  ^  ffl VTI TUEPVU  SFUVSOOCZUFT ^ Example implementation of hal_write in machine.c 61 QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD w 6MUJNBUFMZ JUXBT JNQMFNFOUFEBTTIPXOJOUIF DPEFPOUIFSJHIU w )PXFWFS *FODPVOUFSFE TFWFSBMGBJMVSFTBMPOHUIF XBZ w *XJMMFYQMBJOUIFNMBUFS

  62. w 3FXSJUFPUIFSGVODUJPOTVTJOH UIFTBNFBQQSPBDIBTCFGPSF w .PTUPG1JDP3VCZ`TQPSUJOH XPSLDPOTJTUTPGUIJTQSPDFTT w 0ODFNBDIJOFDJTDPNQMFUF  TUBOEBSEJOQVUBOEPVUQVU

    XJMMCFBWBJMBCMF 62 Porting other functions TUS D QSJOU1MFBTFFOUFSTPNFUFYUaO XIJMFDaO TUS D*0HFUDI  QSJOUD FOE QVUTTUS NSCMJCNBJO@UBTLSC 1MFBTFFOUFSTPNFUFYU )FMMP 3VCZ,BJHJ )FMMP 3VCZ,BJHJ

  63. Steps for Porting  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU 

    1PSUBEEJUJPOBMNSCHFNT 63 +VTU5BMLFE

  64. Steps for Porting  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU 

    1PSUBEEJUJPOBMNSCHFNT 64 /FYU6Q

  65. w &OBCMFUIFFDIPDPNNBOEJOUIFTIFMM w "EENSCHFNTPUIFSUIBOQJDPSVCZNBDIJOF 65 My Goal for This Task

  66. Writing main_task.rb w 1SFQBSJOHB3VCZQSPHSBNUP MBVODIUIFTIFMM w &YUSBDUPOMZUIFOFDFTTBSZ DPEFGSPNUIF31QSPHSBN 66 SFRVJSFTIFMM

    SFRVJSFbNBDIJOF 45%*/*0 45%065*0 CFHJO 45%*/FDIPGBMTF TIFMM4IFMMOFX DMFBOUSVF  QVUT4UBSUJOHTIFMMaOaO TIFMMTIPX@MPHP TIFMMTUBSU SFTDVFF QVUT/PUBWBJMBCMF QVUT\FNFTTBHF^ \FDMBTT^  FOE NSCMJCNBJO@UBTLSC

  67. w NSCHFNTOFFEFEUPFYFDVUFUIFFDIPDPNNBOEJOUIFTIFMM 67 Listing required mrbgems QJDPSVCZTIFMM QJDPSVCZFEJUPS QJDPSVCZTBOECPY QJDPSVCZFOW

    QJDPSVCZJPDPOTPMF QJDPSVCZ fi MFTZTUFNGBU QJDPSVCZWGT QJDPSVCZNFUBQSPH QJDPSVCZUJNFDMBTT QJDPSVCZNBDIJOF

  68. w 4PNFNSCHFNTDPOUBJOPOMZ3VCZ fi MFT OPQPSUJOHOFFEFE 68 Listing required mrbgems ✅QJDPSVCZTIFMM

    ✅QJDPSVCZFEJUPS QJDPSVCZTBOECPY QJDPSVCZFOW QJDPSVCZJPDPOTPMF QJDPSVCZ fi MFTZTUFNGBU ✅QJDPSVCZWGT QJDPSVCZNFUBQSPH QJDPSVCZUJNFDMBTT QJDPSVCZNBDIJOF

  69. w 4PNFNSCHFNTEPOPUIBWFBQPSUEJSFDUPSZ OPQPSUJOHOFFEFE 69 Listing required mrbgems ✅QJDPSVCZTIFMM ✅QJDPSVCZFEJUPS ✅QJDPSVCZTBOECPY

    QJDPSVCZFOW QJDPSVCZJPDPOTPMF QJDPSVCZ fi MFTZTUFNGBU ✅QJDPSVCZWGT ✅QJDPSVCZNFUBQSPH ✅QJDPSVCZUJNFDMBTT QJDPSVCZNBDIJOF

  70. w *IBWFBMSFBEZDPNQMFUFEQPSUJOHQJDPSVCZNBDIJOF w 70 Listing required mrbgems ✅QJDPSVCZTIFMM ✅QJDPSVCZFEJUPS ✅QJDPSVCZTBOECPY

    QJDPSVCZFOW QJDPSVCZJPDPOTPMF QJDPSVCZ fi MFTZTUFNGBU ✅QJDPSVCZWGT ✅QJDPSVCZNFUBQSPH ✅QJDPSVCZUJNFDMBTT ✅QJDPSVCZNBDIJOF

  71. w 5IFSFGPSF NSCHFNTTUJMMOFFEUPCFQPSUFE 71 Listing required mrbgems ✅QJDPSVCZTIFMM ✅QJDPSVCZFEJUPS ✅QJDPSVCZTBOECPY

    QJDPSVCZFOW QJDPSVCZJPDPOTPMF QJDPSVCZ fi MFTZTUFNGBU ✅QJDPSVCZWGT ✅QJDPSVCZNFUBQSPH ✅QJDPSVCZUJNFDMBTT ✅QJDPSVCZNBDIJOF

  72. picoruby-env and picoruby-io-console w 5IFTFNSCHFNTSBOPO&41XJUIPVUNPEJ fi DBUJPO VTJOHUIF FYJTUJOH31DPEF w

    5IFSFGPSF UIF fi MFTXFSFSFVTFE 72 $PQZEJSFDUPSJFTBOE fi MFT

  73. picoruby-filesystem-fat w -JLFQJDPSVCZNBDIJOF JUXPVMEOPSNBMMZSFRVJSFQPSUJOH w )PXFWFS GPSSVOOJOHUIFFDIPDPNNBOE UIFDPEFJTOPU OFDFTTBSZ 73

  74. picoruby-filesystem-fat w .JTTJOHGVODUJPOTDBVTF MJOLFSFSSPST w 5PQSFWFOUUIJT EF fi OFFNQUZ GVODUJPOTPOMZGPSUIPTF

    SFGFSFODFECZPUIFSDPEF 74 JODMVEFMJC ff CTPVSDF ff I 50%0*NQMFNFOUUIJTGVODUJPOMPHJD WPJE '*-&@QIZTJDBM@BEESFTT '*- GQ VJOU@U BEES  \ ^ 50%0*NQMFNFOUUIJTGVODUJPOMPHJD JOU '*-&@TFDUPS@TJ[F WPJE  \ SFUVSO ^ QJDPSVCZ fi MFTZTUFNGBUQPSUTFTQ fl BTI@EJTLD

  75. w "MMNSCHFNTBSFSFBEZ👍 75 Listing required mrbgems ✅QJDPSVCZTIFMM ✅QJDPSVCZFEJUPS ✅QJDPSVCZTBOECPY ✅QJDPSVCZFOW

    ✅QJDPSVCZJPDPOTPMF ✅QJDPSVCZ fi MFTZTUFNGBU ✅QJDPSVCZWGT ✅QJDPSVCZNFUBQSPH ✅QJDPSVCZUJNFDMBTT ✅QJDPSVCZNBDIJOF

  76. Steps for Porting  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT  *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU 

    1PSUBEEJUJPOBMNSCHFNT 76 +VTU5BMLFE

  77. Steps for Porting → Completed 🎉  #VJMEUIF1JDP3VCZTPVSDFUPHFOFSBUFMJCNSVCZB  -JOLMJCNSVCZBBOEDPNQMFUFUIFCVJMEQSPDFTT

     *NQMFNFOUTVQQPSUGPSTUBOEBSEJOQVUBOEPVUQVU  1PSUBEEJUJPOBMNSCHFNT 77

  78. Did Porting Seem Easy? w :FT JUTTJNQMFJGZPVLOPXUIFDPSSFDUTUFQT w "TMPOHBTOPUIJOHHPFTXSPOH😏 78

  79. Troubleshooting collection

  80. case1: Watchdog Timer Error w 5IFGPMMPXJOHFSSPSPDDVSSFEPOUIFEFWJDF 80 &  UBTL@XEU5BTLXBUDIEPHHPUUSJHHFSFE5IFGPMMPXJOHUBTLTVTFSTEJEOPUSFTFUUIFXBUDIEPHJOUJNF

    &  UBTL@XEU*%-& $16  &  UBTL@XEU5BTLTDVSSFOUMZSVOOJOH &  UBTL@XEU$16NBJO &  UBTL@XEU$16*%-& &  UBTL@XEU1SJOU$16 DVSSFOUDPSF CBDLUSBDF

  81. case1: Watchdog Timer Error w "UJNFSVTFEUPEFUFDUJGBQSPHSBNIBTDSBTIFEPSGSP[FO w "GFBUVSFQSPWJEFECZ'SFF3504 UIFSFBMUJNF04SVOOJOHPO &41

    81

  82. case1: Watchdog Timer Error w 8IZ8BTUIF8BUDIEPH5JNFS5SJHHFSFE  w 1JDP3VCZIBTJUTPXONFDIBOJTNGPSDPOUFYUTXJUDIJOHXJUIJO UIF7.

    5$#  w 5IJTBMMPXTDPOUFYUTXJUDIJOHSFHBSEMFTTPGUIF04UZQFPS XIFUIFSBO04JTQSFTFOUPOUIFNJDSPDPOUSPMMFS 82

  83. case1: Watchdog Timer Error w 6OMFTTUIF3VCZQSPHSBNFYQMJDJUMZJODMVEFTTMFFQ UIF$16 SFNBJOTDPOUJOVPVTMZBDUJWF w "TBSFTVMU

    'SFF3504JOUFSQSFUTUIJTBTBSVOBXBZQSPHSBNTJODF UIF$16JTOPUJEMJOH 83

  84. case1: Watchdog Timer Error w %FDJEFEUPEJTBCMFUIF 8BUDIEPH5JNFSBTB DPVOUFSNFBTVSF w $POUFYUTXJUDIJOHJT

    IBOEMFECZ5$# w 5IFPSJHJOBM31QSPKFDUIBT BEPQUFEUIFTBNFBQQSPBDI 84 JODMVEFNSCNBJO@UBTLD  WPJEQJDPSVCZ@FTQ WPJE  \ %JTBCMF58%5 FTQ@UBTL@XEU@EFJOJU  NSCD@JOJU IFBQ@QPPM )&"1@4*;&   ^ 31&41NBJONBJOD TIPVMEDBMMJU

  85. case 2: “require” Doesn't Work w 8IFOFYFDVUJOHlSFRVJSFzJOB3VCZQSPHSBN UIFGPMMPXJOHFSSPS PDDVST 85

    &YDFQUJPO WN@JE VOEF fi OFEMPDBMWBSJBCMFPSNFUIPESFRVJSFGPS0CKFDU /P.FUIPE&SSPS

  86. case 2: “require” Doesn't Work w QJDPSVCZTIFMMBOEQJDPSVCZ SFRVJSFHFOFSBUF$TPVSDF DPEFEVSJOHUIFCVJME QSPDFTT

    w 5IFJOJUJBMJ[BUJPOGVODUJPOT EF fi OFEJOUIFTFTPVSDF fi MFT NVTUCFDBMMFEGSPNUIFNBJO GVODUJPO 86 TUBUJDQJDPHFNTQSFCVJMU@HFNT<>\ \NBDIJOF NBDIJOF NSCD@NBDIJOF@JOJU GBMTF^  \FOW FOW NSCD@FOW@JOJU GBMTF^   \/6-- /6-- /6-- USVF^ TFOUJOFM  ^  WPJE QJDPSVCZ@JOJU@SFRVJSF NSCD@WN WN  \  ^ QJDPSVCZCVJMEFTQNSCHFNTQJDPHFN@JOJUD

  87. case 2: “require” Doesn't Work w QJDPSVCZTIFMMBOEQJDPSVCZ SFRVJSFHFOFSBUF$TPVSDF DPEFEVSJOHUIFCVJME QSPDFTT

    w 5IFJOJUJBMJ[BUJPOGVODUJPOT EF fi OFEJOUIFTFTPVSDF fi MFT NVTUCFDBMMFEGSPNUIFNBJO GVODUJPO 87 JODMVEFNSCNBJO@UBTLD WPJEBQQ@NBJO WPJE  \ EJTBCMF8%5 FTQ@UBTL@XEU@EFJOJU  NSCD@JOJU IFBQ@QPPM )&"1@4*;&   QJDPSVCZ@JOJU@SFRVJSF WN  QJDPSVCZ@JOJU@FYFDVUBCMFT WN  NSCD@SVO  ^ 31&41NBJONBJOD 4IPVMEDBMMJU

  88. case 3: Stack overflow w 8IFOSVOOJOHB3VCZQSPHSBNJOJSCPSBOZPUIFSTDSJQU UIFTZTUFN TVEEFOMZSFCPPUT 88 JSC

    JSCB    JSCBNBQ\cJcJ ^FBDIEPcOVNc JSC OVNOVN  JSC QVUTOVN JSC FOE &3303 "TUBDLPWFS fl PXJOUBTLNBJOIBTCFFOEFUFDUFE

  89. case 3: Stack overflow w 8IFOSVOOJOHB3VCZQSPHSBNJOJSCPSBOZPUIFSTDSJQU UIFTZTUFN TVEEFOMZSFCPPUT 89 JSC

    JSCB    JSCBNBQ\cJcJ ^FBDIEPcOVNc JSC OVNOVN  JSC QVUTOVN JSC FOE &3303 "TUBDLPWFS fl PXJOUBTLNBJOIBTCFFOEFUFDUFE 0,

  90. case 3: Stack overflow w 8IFOSVOOJOHB3VCZQSPHSBNJOJSCPSBOZPUIFSTDSJQU UIFTZTUFN TVEEFOMZSFCPPUT 90 JSC

    JSCB    JSCBNBQ\cJcJ ^FBDIEPcOVNc JSC OVNOVN  JSC QVUTOVN JSC FOE &3303 "TUBDLPWFS fl PXJOUBTLNBJOIBTCFFOEFUFDUFE /(

  91. case 3: Stack overflow w 8IFOSVOOJOHB3VCZQSPHSBNJOJSCPSBOZPUIFSTDSJQU UIFTZTUFN TVEEFOMZSFCPPUT 91 JSC

    JSCB    JSCBNBQ\cJcJ ^FBDIEPcOVNc JSC OVNOVN  JSC QVUTOVN JSC FOE &3303 "TUBDLPWFS fl PXJOUBTLNBJOIBTCFFOEFUFDUFE

  92. case 3: Stack overflow w 'SFF3504TUBSUTUIF BQQ@NBJOUBTLBUCPPU BOE 1JDP3VCZ7.SVOTXJUIJOUIJT UBTL

    w #ZEFGBVMU UIFBQQ@NBJOUBTL IBTBTUBDLTJ[FPG  CZUFTBMMPDBUFE 92

  93. case 3: Stack overflow w 'VODUJPODBMMTBOEMPDBM BVUPNBUJD WBSJBCMFT DPOTVNFTUBDLNFNPSZ w

    *GVTBHFFYDFFET CZUFT  BTUBDLPWFS fl PXPDDVST 93

  94. case 3: Stack overflow w *O&41*%' UIFTUBDLTJ[FPG UIFBQQ@NBJOUBTLDBOCF NPEJ fi

    FEWJBDPO fi HVSBUJPO w "EEUIFGPMMPXJOHFOUSZUP TELDPO fi HEFGBVMUTUPDIBOHF UIFTUBDLTJ[F 94 $0/'*(@&41@."*/@5"4,@45"$,@4*;& 31&41TELDPO fi HEFGBVMUT

  95. case 4: CSI Command Not Working w 31DIFDLTUIFUFSNJOBM FNVMBUPSTUBUFBUTUBSUVQ w

    4QFDJ fi DBMMZ JUVTFT$4* $POUSPM4FRVFODF *OUSPEVDFS %43 %FWJDF 4UBUVT3FQPSU GPSUIJT QVSQPTF 95 DMBTT*0  EFGTFMGXBJU@UFSNJOBM UJNFPVU  SFT 45%*/SFBE@OPOCMPDL   45%065QSJOUaF<O$4*%43  UJNFPVU  UP@JUJNFTEPcJc SFT45%*/SFBE@OPOCMPDL  UP@T CSFBLJJGSFTMFOHUI TMFFQ@NT FOE &/7<5&3.>SFTTUBSU@XJUI aF<O  BOTJ EVNC FOE QJDPSVCZJPDPOTPMFNSCMJCJPDPOTPMFSC

  96. case 4: CSI Command Not Working w 31DIFDLTUIFUFSNJOBM FNVMBUPSTUBUFBUTUBSUVQ w

    4QFDJ fi DBMMZ JUVTFT$4* $POUSPM4FRVFODF *OUSPEVDFS %43 %FWJDF 4UBUVT3FQPSU GPSUIJT QVSQPTF 96 DMBTT*0  EFGTFMGXBJU@UFSNJOBM UJNFPVU  SFT 45%*/SFBE@OPOCMPDL   45%065QSJOUaF<O$4*%43  UJNFPVU  UP@JUJNFTEPcJc SFT45%*/SFBE@OPOCMPDL  UP@T CSFBLJJGSFTMFOHUI TMFFQ@NT FOE &/7<5&3.>SFTTUBSU@XJUI aF<O  BOTJ EVNC FOE QJDPSVCZJPDPOTPMFNSCMJCJPDPOTPMFSC

  97. case 4: CSI Command Not Working w *GUIFUFSNJOBMFNVMBUPSJT SFBEZ JUTIPVMESFDFJWF

    aF<OGSPNTUBOEBSEJOQVU w )PXFWFS BOJTTVFPDDVSSFE XIFSFUIJTJOQVUXBTOPU CFJOHSFBEQSPQFSMZ 97 DMBTT*0  EFGTFMGXBJU@UFSNJOBM UJNFPVU  SFT 45%*/SFBE@OPOCMPDL   45%065QSJOUaF<O$4*%43  UJNFPVU  UP@JUJNFTEPcJc SFT45%*/SFBE@OPOCMPDL  UP@T CSFBLJJGSFTMFOHUI TMFFQ@NT FOE &/7<5&3.>SFTTUBSU@XJUI aF<O  BOTJ EVNC FOE QJDPSVCZJPDPOTPMFNSCMJCJPDPOTPMFSC

  98. case 4: CSI Command Not Working w *G$4*%43GBJMT UIFGBNJMJBS 1JDP3VCZMPHPEPFTOU

    BQQFBS w 5IJTJTBTFSJPVTJTTVF😱 98

  99. case 4: CSI Command Not Working w 5IFDBVTFXBTUIFJOJUJBMMZ QPSUFEQJDPSVCZNBDIJOF w

    "U fi STU *IBEJNQMFNFOUFEJU MJLFUIJT 99 JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ SFUVSOQSJOUG CVG  ^ QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD

  100. case 4: CSI Command Not Working w $BOZPVTQPUUIFEJ ff FSFODF

    100 JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ SFUVSOQSJOUG CVG  ^ QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ GPS JOUJJOCZUFTJ \ QVUDIBS DIBS CVG <J>  ^  ffl VTI TUEPVU  SFUVSOOCZUFT ^ QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD #FGPSF "GUFS

  101. case 4: CSI Command Not Working w 5IFDPEFCFGPSFUIF fi YIBE

    UXPJTTVFT  *UJHOPSFEOCZUFT UIF OVNCFSPGCZUFTUPXSJUF  *UEJEOPUDBMM ffl VTI TP UIF$4*DPNNBOENJHIU SFNBJOCV ff FSFEBOEOPU TFOUJNNFEJBUFMZ 101 JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ SFUVSOQSJOUG CVG  ^ QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD

  102. case 4: CSI Command Not Working w "GUFS fi YJOHQJDPSVCZNBDIJOF

    UIF$4*DPNNBOETUBSUFEXPSLJOH QSPQFSMZ 102 JOU IBM@XSJUF JOUGE DPOTUWPJE CVG JOUOCZUFT  \ GPS JOUJJOCZUFTJ \ QVUDIBS DIBS CVG <J>  ^  ffl VTI TUEPVU  SFUVSOOCZUFT ^ QJDPSVCZNBDIJOFQPSUTFTQNBDIJOFD

  103. Demo

  104. 104

  105. Demo explanation 105

  106. Demo explanation 106 $PNNVOJDBUJOH XJUIUIF.BUSJY -&%WJB41* QJDPSVCZTQJ

  107. Demo explanation 107 3FBEJOHUIF9 BYJTUJMUGSPNUIF +PZTUJDLVTJOH "%$ QJDPSVCZBED

  108. Demo explanation 108 (FOFSBUJOHTPVOE CZPVUQVUUJOH XBWFGPSNTWJB 18.UPUIFQJF[P FMFNFOU QJDPSVCZQXN

  109. Conclusion

  110. Summary w 5IJTTFTTJPODPWFSFEQPSUJOH1JDP3VCZUP&41 w 5IFQSPDFTTBQQMJFTUPPUIFSNJDSPDPOUSPMMFSTUPP w 1PSUJOHUP45.BOEO3'JTDPOTJEFSFE w "HSFBUDIBODFUPDPOUSJCVUF🚀 110

  111. Summary w 0GDPVSTF UIFSFBSFTUJMMNBOZXBZTUPDPOUSJCVUFUP&41 w *GZPVSFJOUFSFTUFE MFUTUBML w *CSPVHIUTPNFEFWJDFTUPTIBSF 111

  112. Summary w 1MFBTFWJTJUUIFGPMMPXJOHSFQPTJUPSZ w IUUQTHJUIVCDPNQJDPSVCZ31&41 w IUUQTHJUIVCDPNQJDPSVCZQJDPSVCZ 112

  113. end Thank you for coming!