Porting filesystem-fat to Another Microcontroller: ESP32

೥݄೔ ౔ 1JDP3VCZ0WFS fl PXձٞ :VIFJ0LB[BLJ !:@VVV Porting filesystem-fat to
Another Microcontroller: ESP32

TFMGJOTQFDU w Ԭቌ༤ฏ w !:@VVV 9 !ZVVVOFU #MVF4LZ w
!ZVVV (JU)VC w גࣜձࣾ'VTJDͷ*P5Ϋϥ΢υΤϯδχΞ w ϑΟϤϧυϒʔτΩϟϯϓͷϝϯλʔ 2

ٱ͠ͿΓͷେࡕʂ w ࢲ͸ࢁޱݝੜ·Εɺ෱ԬݝࡏॅͰ͢ ࣾձਓʹͳͬͨ೥͔Β೥·Ͱฌݿݝҏ୮ࢢʹॅΜͰ͍·ͨ͠ w ࡕٸകాӺͷلҏࠃ԰ॻళͰͻͨ͢Βٕज़ॻΛങ͍ړͬͨ೔ʑʜ w ϓϩ໺ٿ͸ࠓͰ΋ࡕਆΛԠԉ͍ͯ͠·͢ ߕࢠԂߦ͖͔ͨͬͨ 3

1PSUJOH1JDP3VCZUP"OPUIFS.JDSPDPOUSPMMFS &41 w 3VCZ,BJHJͰ্هͷΑ͏ͳλΠτϧͰ͓࿩Λ͠·ͨ͠ w ࠓ೔ͷτʔΫ͸͍Θ͹ͦͷʮεϐϯΦϑʯͰ͢ 4 IUUQTSVCZLBJHJPSHQSFTFOUBUJPOT:@VVVIUNM

͔͜͜Βຊ୊

31&41 6

31&41 w &41্Ͱಈ࡞͢Δ31 3VCZ3BQJE1PSUBCMF1MBUGPSN w &41ɺ&414ɺ&41$ͱ͍ͬͨϚΠίϯͰͷಈ࡞࣮੷͕͋Δ 7

w 3VCZ,BJHJͰൃදͨ͠खॱͰϙʔςΟϯάͨ͜͠ͱͰ ඪ४ೖग़ྗ͕࢖͑ΔΑ͏ʹͳͬͨ ౰࣌ ೥݄ॳ० ͷঢ়گ 8 FDIPίϚϯυ͕ಈ࡞

౰࣌ ೥݄ॳ० ͷঢ়گ w γΣϧ͸ಈ͕͘ϑΝΠϧγεςϜ͕ଘࡏ͠ͳ͍ w ౰વɺQXE MTͷΑ͏ͳίϚϯυ͸ಈ͔ͳ͍ 9

'"5ϑΝΠϧγεςϜͱ͸ w ϑΝΠϧ΍σΟϨΫτϦͷ֨ೲ΍؅ཧʹ࢖༻͞ΕΔٕज़ w '"5'JMF"MMPDBUJPO5BCMF ௚༁͢ΔͱʮϑΝΠϧׂ౰දʯ ͷུ w ໦ߏ଄ͰϑΝΠϧΛ؅ཧͰ͖Δ 10

31ʹ͓͚Δ'"5ϑΝΠϧγεςϜ 11

31ʹ͓͚Δ'"5ϑΝΠϧγεςϜ 12 QJDPSVCZTIFMMͷίϚϯυ౳͕֨ೲ͞ΕΔ

31ʹ͓͚Δ'"5ϑΝΠϧγεςϜ 13 Ϣʔβʔ͕ࣗ༝ʹϑΝΠϧΛ֨ೲͰ͖Δ 31&41ͷ৔߹TUPSBHFIPNF഑Լ͕ॻ͖ࠐ·ΕΔ

31ʹ͓͚Δ'"5ϑΝΠϧγεςϜ 14 ىಈ࣌ʹ࣮ߦ͢ΔεΫϦϓτΛ֨ೲ 31&41Ͱ͸ະ࢖༻

&41Ͱಈ͔ͨ͢Ί ·ͣ͸ઃܭ📝

QJDPSVCZGJMFTZTUFNGBU w '"5ϑΝΠϧγεςϜʹΞΫηεͰ͖ΔΑ͏ʹ͢ΔͨΊͷNSCHFN w 'BU'T ૊ࠐΈγεςϜ޲͚ͷ'"5 ͷ$ιʔεΛ಺แ w IUUQTFMNDIBOPSHGTX ff
16

σΟϨΫτϦߏ੒ w QJDPSVCZ fi MFTZTUFNGBU͸࣍ͷਤͷΑ͏ͳߏ੒ͱͳ͍ͬͯΔ 17

σΟϨΫτϦߏ੒ w QJDPSVCZ fi MFTZTUFNGBU͸࣍ͷਤͷΑ͏ͳߏ੒ͱͳ͍ͬͯΔ 18 'BU'Tͷιʔείʔυ

σΟϨΫτϦߏ੒ w QJDPSVCZ fi MFTZTUFNGBU͸࣍ͷਤͷΑ͏ͳߏ੒ͱͳ͍ͬͯΔ 19 QPSUTσΟϨΫτϦ͕͋Δ ͜͜ͷιʔείʔυ͕ϚΠίϯ͝ͱͷ ࠩ෼Λٵऩ͢ΔͨΊͷ΋ͷ

ϙʔςΟϯάൣғͷݕ౼ w QPSUTSQ഑Լʹ͸࣍ͷΑ͏ͳϑΝΠϧ͕͋Δ 20

ϙʔςΟϯάൣғͷݕ౼ w QPSUTSQ഑Լʹ͸࣍ͷΑ͏ͳϑΝΠϧ͕͋Δ 21 'MBTIϝϞϦ্ͷ'"5ϑΝΠϧ γεςϜʹؔ͢Δॲཧ

ϙʔςΟϯάൣғͷݕ౼ w QPSUTSQ഑Լʹ͸࣍ͷΑ͏ͳϑΝΠϧ͕͋Δ 22 41*઀ଓ͞Εͨ4%Χʔυεϩοτ্ͷ '"5ϑΝΠϧγεςϜʹؔ͢Δॲཧ

ϙʔςΟϯάൣғͷݕ౼ w QPSUTSQ഑Լʹ͸࣍ͷΑ͏ͳϑΝΠϧ͕͋Δ 23 σόΠεΛ1$ʹ64#઀ଓͨ͠ࡍʹϑΝΠϧγ εςϜͱͯ͠Ϛ΢ϯτ͞ΕΠϝʔδΛॻ͖ࠐ ΊΔΑ͏ʹ͢Δॲཧ 64#.4$

ϙʔςΟϯάൣғͷݕ౼ w ࠓճ͸QPSUTFTQ fl BTI@EJTDDͷΈΛϙʔςΟϯά 24

ϙʔςΟϯάൣғͷݕ౼ w ࠓճ͸QPSUTFTQ fl BTI@EJTDDͷΈΛϙʔςΟϯά 25 ίϯτϦϏϡʔτνϟϯε &414·ͨ͸&414͔͠ ରԠͯ͠ͳͦ͞͏ ༗ࣝऀͷํ͕͍ͨΒڭ͑ͯԼ͍͞

'MBTIϝϞϦͷύʔςΟγϣϯઃܭ w 'MBTIϝϞϦ্ͷͲͷྖҬʹϑΝΠϧγεςϜΛߏங͢Δ͔ܾΊΔ 26 ໊લ આ໌ Φϑηοτ αΠζ OWT ,FZ7BMVFͳ஋͕อଘ͞ΕΔ
Y Y QIZ@JOJU 1):ͱݺ͹ΕΔ8J'J΍#MVFUPPUIͷઃఆ͕อଘ͞ΕΔ YG Y GBDUPSZ ϓϩάϥϜͷόΠφϦ͕ॻ͖ࠐ·ΕΔ Y . ۭ͖ྖҬ &41ͷ'MBTIϝϞϦͷύʔςΟγϣϯςʔϒϧ σϑΥϧτ

'MBTIϝϞϦͷύʔςΟγϣϯઃܭ w 'MBTIϝϞϦ্ͷͲͷྖҬʹϑΝΠϧγεςϜΛߏங͢Δ͔ܾΊΔ 27 ໊લ આ໌ Φϑηοτ αΠζ OWT ,FZ7BMVFͳ஋͕อଘ͞ΕΔ
Y Y QIZ@JOJU 1):ͱݺ͹ΕΔ8J'J΍#MVFUPPUIͷઃఆ͕อଘ͞ΕΔ YG Y GBDUPSZ ϓϩάϥϜͷόΠφϦ͕ॻ͖ࠐ·ΕΔ Y . TUPSBHF '"5ϑΝΠϧγεςϜ Y . ۭ͖ྖҬ &41ͷ'MBTIϝϞϦͷύʔςΟγϣϯςʔϒϧ ΧελϚΠζޙ ޙ΄ͲඞཁͳͷͰ͓֮͑ͯ͘

w 'MBTIϝϞϦʹ͸ʮηΫλʯͱ͍͏֓೦͕ଘࡏ͢Δ w ηΫλ୯ҐͰಡΈॻ͖Λߦ͏ w &41ͷ৔߹ηΫλͷαΠζ͸CZUF ,# ηΫλαΠζͷ֬ೝ 28

͜͜·Ͱͷ·ͱΊ w 'MBTIϝϞϦ্ʹ.#ͷ'"5ϑΝΠϧγεςϜΛߏங͢Δ w QJDPSVCZ fi MFTZTUFNGBUͷ fl BTI@EJTLDΛ&41޲͚ʹϙʔςΟϯά͢Δ w
ϓϩτλΠϓએݴΛม͑ͣʹத਎Λ࣮૷͠௚͢ w 'MBTIϝϞϦͷΦϑηοτY͔Β.#ͷྖҬΛॆͯΔ w 'MBTIϝϞϦͷηΫλαΠζ͸,#Ͱ͋Δ 29

ϙʔςΟϯά Ҡ২ 👨💻

ύʔςΟγϣϯΛఆٛ w &41ͷ։ൃ؀ڥͰ͋Δ&41*%'ͷػೳΛ׆༻ w ϓϩδΣΫτ௚ԼʹQBSUJUJPOTDTWͱ͍͏ϑΝΠϧΛ࡞੒࣍͠ͷΑ͏ʹهࡌ 31 # N a m
e , T y p e , S u b T y p e , O f f s e t , S i z e , F l a g s # N o t e : i f y o u h a v e i n c r e a s e d t h e b o o t l o a d e r s i z e , m a k e s u r e t o u p d a t e t h e o f f s e t s t o a v o i d o v e r l a p n v s , d a t a , n v s , 0 x 9 0 0 0 , 0 x 6 0 0 0 , p h y _ i n i t , d a t a , p h y , 0 x f 0 0 0 , 0 x 1 0 0 0 , f a c t o r y , a p p , f a c t o r y , 0 x 1 0 0 0 0 , 1 M , s t o r a g e , d a t a , f a t , , 1 M , TUPSBHFͱ͍͏.#ͷ'"5ྖҬΛ௥Ճ

w NBJO$.BLF-JTUTUYUʹ'"5ϑΝΠϧγεςϜपΓͷઃఆΛ௥ه i d f _ c o m p
o n e n t _ r e g i s t e r ( S R C S "m a i n . c " R E Q U I R E S p i c o r u b y - e s p 3 2 P R I V _ R E Q U I R E S s p i _ f l a s h I N C L U D E _ D I R S "" ) s e t ( i m a g e . . / s t o r a g e ) f a t f s _ c r e a t e _ r a w f l a s h _ i m a g e ( s t o r a g e $ { i m a g e } F L A S H _ I N _ P R O J E C T P R E S E R V E _ T I M E ) '"5ϑΝΠϧγεςϜͷΠϝʔδΛ࡞੒ˍॻ͖ࠐΈ 32 TUPSBHFσΟϨΫτϦΛ'"5ϑΝΠϧγεςϜͷ ΠϝʔδԽ͢ΔͨΊͷδΣωϨʔλΛ࢖༻

w SBLFCVJME͢ΔͱCVJMETUPSBHFCJO͕ੜ੒͞ΕΔ w .#ͷ'"5ϑΝΠϧγεςϜͷΠϝʔδϑΝΠϧ w ͜ͷϑΝΠϧ͕'MBTIϝϞϦͷΦϑηοτYʹॻ͖ࠐ·ΕΔ '"5ϑΝΠϧγεςϜͷΠϝʔδΛ࡞੒ˍॻ͖ࠐΈ 33

GMBTI@EJTLDͷϙʔςΟϯά w '-"4)@EJTL@XSJUF 'MBTIϝϞϦ΁ͷॻ͖ࠐΈؔ਺ 34 i n t F L
A S H _ d i s k _ w r i t e ( c o n s t B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { } ॻ͖ࠐΉσʔλ ઌ಄ͷηΫλ൪߸ ॻ͖ࠐΉηΫλ਺ ͜͜ʹཁ݅Λຬͨ͢Α͏ͳίʔυΛॻ͘

A S H _ d i s k _ w r i t e ( c o n s t B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { e s p _ f l a s h _ t * c h i p = e s p _ f l a s h _ d e f a u l t _ c h i p ; u i n t 3 2 _ t o f f s e t = F L A S H _ O F F S E T + ( s e c t o r * S P I _ F L A S H _ S E C _ S I Z E ) ; u i n t 3 2 _ t s i z e = c o u n t * S P I _ F L A S H _ S E C _ S I Z E ; e s p _ e r r _ t r e t = e s p _ f l a s h _ e r a s e _ r e g i o n ( c h i p , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t = e s p _ f l a s h _ w r i t e ( c h i p , b u f f , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t u r n R E S _ O K ; }

A S H _ d i s k _ w r i t e ( c o n s t B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { e s p _ f l a s h _ t * c h i p = e s p _ f l a s h _ d e f a u l t _ c h i p ; u i n t 3 2 _ t o f f s e t = F L A S H _ O F F S E T + ( s e c t o r * S P I _ F L A S H _ S E C _ S I Z E ) ; u i n t 3 2 _ t s i z e = c o u n t * S P I _ F L A S H _ S E C _ S I Z E ; e s p _ e r r _ t r e t = e s p _ f l a s h _ e r a s e _ r e g i o n ( c h i p , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t = e s p _ f l a s h _ w r i t e ( c h i p , b u f f , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t u r n R E S _ O K ; } Y ,#

A S H _ d i s k _ w r i t e ( c o n s t B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { e s p _ f l a s h _ t * c h i p = e s p _ f l a s h _ d e f a u l t _ c h i p ; u i n t 3 2 _ t o f f s e t = F L A S H _ O F F S E T + ( s e c t o r * S P I _ F L A S H _ S E C _ S I Z E ) ; u i n t 3 2 _ t s i z e = c o u n t * S P I _ F L A S H _ S E C _ S I Z E ; e s p _ e r r _ t r e t = e s p _ f l a s h _ e r a s e _ r e g i o n ( c h i p , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t = e s p _ f l a s h _ w r i t e ( c h i p , b u f f , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t u r n R E S _ O K ; } ॻ͖ࠐΈઌͷΞυϨεɾαΠζΛܭࢉ ॻ͖ࠐΈઌͷ'MBTIϝϞϦΛফڈ σʔλΛॻ͖ࠐΉ

GMBTI@EJTLDͷϙʔςΟϯά w '-"4)@EJTL@SFBE 'MBTIϝϞϦ͔ΒͷಡΈࠐΈؔ਺ 38 i n t F L
A S H _ d i s k _ r e a d ( B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { } ಡΈࠐΜͩσʔλ ઌ಄ͷηΫλ൪߸ ಡΈࠐΉηΫλ਺ ͜͜ʹཁ݅Λຬͨ͢Α͏ͳίʔυΛॻ͘

A S H _ d i s k _ r e a d ( B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { e s p _ f l a s h _ t * c h i p = e s p _ f l a s h _ d e f a u l t _ c h i p ; u i n t 3 2 _ t o f f s e t = F L A S H _ O F F S E T + ( s e c t o r * S P I _ F L A S H _ S E C _ S I Z E ) ; u i n t 3 2 _ t s i z e = c o u n t * S P I _ F L A S H _ S E C _ S I Z E ; e s p _ e r r _ t r e t = e s p _ f l a s h _ r e a d ( c h i p , b u f f , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t u r n R E S _ O K ; }

A S H _ d i s k _ r e a d ( B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { e s p _ f l a s h _ t * c h i p = e s p _ f l a s h _ d e f a u l t _ c h i p ; u i n t 3 2 _ t o f f s e t = F L A S H _ O F F S E T + ( s e c t o r * S P I _ F L A S H _ S E C _ S I Z E ) ; u i n t 3 2 _ t s i z e = c o u n t * S P I _ F L A S H _ S E C _ S I Z E ; e s p _ e r r _ t r e t = e s p _ f l a s h _ r e a d ( c h i p , b u f f , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t u r n R E S _ O K ; } Y ,#

A S H _ d i s k _ r e a d ( B Y T E * b u f f , L B A _ t s e c t o r , U I N T c o u n t ) { e s p _ f l a s h _ t * c h i p = e s p _ f l a s h _ d e f a u l t _ c h i p ; u i n t 3 2 _ t o f f s e t = F L A S H _ O F F S E T + ( s e c t o r * S P I _ F L A S H _ S E C _ S I Z E ) ; u i n t 3 2 _ t s i z e = c o u n t * S P I _ F L A S H _ S E C _ S I Z E ; e s p _ e r r _ t r e t = e s p _ f l a s h _ r e a d ( c h i p , b u f f , o f f s e t , s i z e ) ; i f ( r e t ! = E S P _ O K ) r e t u r n R E S _ E R R O R ; r e t u r n R E S _ O K ; } ಡΈग़͠ݩͷΞυϨεɾαΠζΛܭࢉ ಡΈग़͢

GMBTI@EJTLDͷϙʔςΟϯά w '-"4)@EJTL@JPDUM 'MBTIϝϞϦͷঢ়ଶมߋ΍ঢ়ଶऔಘ 42 D R E S U
L T F L A S H _ d i s k _ i o c t l ( B Y T E c m d , v o i d * b u f f ) { } ίϚϯυ ݁Ռͷ֨ೲઌ

L T F L A S H _ d i s k _ i o c t l ( B Y T E c m d , v o i d * b u f f ) { s w i t c h ( c m d ) { / * 省略 * / c a s e G E T _ S E C T O R _ S I Z E : * ( ( W O R D * ) b u f f ) = ( W O R D ) S P I _ F L A S H _ S E C _ S I Z E ; b r e a k ; c a s e G E T _ S E C T O R _ C O U N T : * ( ( L B A _ t * ) b u f f ) = ( L B A _ t ) ( F L A S H _ S I Z E / S P I _ F L A S H _ S E C _ S I Z E ) ; b r e a k ; d e f a u l t : r e t u r n R E S _ P A R E R R ; } r e t u r n R E S _ O K ;

L T F L A S H _ d i s k _ i o c t l ( B Y T E c m d , v o i d * b u f f ) { s w i t c h ( c m d ) { / * 省略 * / c a s e G E T _ S E C T O R _ S I Z E : * ( ( W O R D * ) b u f f ) = ( W O R D ) S P I _ F L A S H _ S E C _ S I Z E ; b r e a k ; c a s e G E T _ S E C T O R _ C O U N T : * ( ( L B A _ t * ) b u f f ) = ( L B A _ t ) ( F L A S H _ S I Z E / S P I _ F L A S H _ S E C _ S I Z E ) ; b r e a k ; d e f a u l t : r e t u r n R E S _ P A R E R R ; } r e t u r n R E S _ O K ; .# ,#

L T F L A S H _ d i s k _ i o c t l ( B Y T E c m d , v o i d * b u f f ) { s w i t c h ( c m d ) { / * 省略 * / c a s e G E T _ S E C T O R _ S I Z E : * ( ( W O R D * ) b u f f ) = ( W O R D ) S P I _ F L A S H _ S E C _ S I Z E ; b r e a k ; c a s e G E T _ S E C T O R _ C O U N T : * ( ( L B A _ t * ) b u f f ) = ( L B A _ t ) ( F L A S H _ S I Z E / S P I _ F L A S H _ S E C _ S I Z E ) ; b r e a k ; d e f a u l t : r e t u r n R E S _ P A R E R R ; } r e t u r n R E S _ O K ; ηΫλαΠζ ,# Λ֨ೲ ηΫλ਺ .#,# Λ֨ೲ

NBJO@UBTLSC͔Βͷݺͼग़͠ w 1JDP3VCZ7.ىಈ௚ޙͷॲཧͰ'"5ϑΝΠϧγεςϜΛॳظԽ 46 r e q u i r
e "s h e l l " # S e t u p f l a s h d i s k b e g i n S T D I N . e c h o = f a l s e p u t s "I n i t i a l i z i n g F L A S H d i s k a s t h e r o o t v o l u m e . . . " S h e l l . s e t u p _ r o o t _ v o l u m e ( : f l a s h , l a b e l : ' s t o r a g e ' ) S h e l l . s e t u p _ s y s t e m _ f i l e s p u t s "A v a i l a b l e " r e s c u e = > e p u t s "N o t a v a i l a b l e " p u t s "# { e . m e s s a g e } ( # { e . c l a s s } ) " e n d

e "s h e l l " # S e t u p f l a s h d i s k b e g i n S T D I N . e c h o = f a l s e p u t s "I n i t i a l i z i n g F L A S H d i s k a s t h e r o o t v o l u m e . . . " S h e l l . s e t u p _ r o o t _ v o l u m e ( : f l a s h , l a b e l : ' s t o r a g e ' ) S h e l l . s e t u p _ s y s t e m _ f i l e s p u t s "A v a i l a b l e " r e s c u e = > e p u t s "N o t a v a i l a b l e " p u t s "# { e . m e s s a g e } ( # { e . c l a s s } ) " e n d ϧʔτϘϦϡʔϜͷ࡞੒ॲཧ ΠϝʔδΛॻ͖ࠐΜͩ࣌఺ͰAA͸ ଘࡏ͢ΔͷͰԿ΋͠ͳ͍

e "s h e l l " # S e t u p f l a s h d i s k b e g i n S T D I N . e c h o = f a l s e p u t s "I n i t i a l i z i n g F L A S H d i s k a s t h e r o o t v o l u m e . . . " S h e l l . s e t u p _ r o o t _ v o l u m e ( : f l a s h , l a b e l : ' s t o r a g e ' ) S h e l l . s e t u p _ s y s t e m _ f i l e s p u t s "A v a i l a b l e " r e s c u e = > e p u t s "N o t a v a i l a b l e " p u t s "# { e . m e s s a g e } ( # { e . c l a s s } ) " e n d CJO΍FUDJOJUEͳͲʹ ϑΝΠϧΛ഑ஔ͢Δ

ಈ࡞֬ೝ🔍

։ൃ༻1$্Ͱͷૢ࡞ w TUPSBHFIPNFʹϑΝΠϧΛ֨ೲ w NZ@QSPHSBNSCͱ͍͏ϑΝΠϧ w SBLFίϚϯυͰॻ͖ࠐΈ w TUPSBHF഑ԼΛͱͯ͠ '"5ϑΝΠϧγεςϜ͕ߏங͞ΕΔ
50

w ϚΠίϯ্ͰQXE MTίϚϯυ͕ಈ࡞ w ഑ஔ͞Ε͍ͯΔϑΝΠϧ͕ ։ൃ༻1$Ͱ֨ೲͨ͠΋ͷͱಉ͡ w ϓϩάϥϜͷ࣮ߦ΋Ͱ͖͍ͯΔ w ϑΝΠϧΛಡΈࠐΊ͍ͯΔ
w NLEJS΍UPVDI΋ಈ࡞͢Δ w ॻ͖ࠐΈ΋Ͱ͖͍ͯΔ ࣮ػ্Ͱͷૢ࡞ 51

5*14TUPSBHFͷॻ͖׵͑Λͪΐͬͱ͚ͩߴ଎Խ͢Δ w SBLF ਖ਼֬ʹ͸SBLF fl BTI ͸ҎԼΛશͯॻ͖׵͍͕͔͔͑ͯͯ࣌ؒΔ 52 ໊લ આ໌
Φϑηοτ αΠζ OWT ,FZ7BMVFͳ஋͕อଘ͞ΕΔ Y Y QIZ@JOJU 1):ͱݺ͹ΕΔ8J'J΍#MVFUPPUIͷઃఆ͕อଘ͞ΕΔ YG Y GBDUPSZ ϓϩάϥϜͷόΠφϦ͕ॻ͖ࠐ·ΕΔ Y . TUPSBHF '"5ϑΝΠϧγεςϜ Y . ۭ͖ྖҬ &41ͷ'MBTIϝϞϦͷύʔςΟγϣϯςʔϒϧ ΧελϚΠζޙ

5*14TUPSBHFͷॻ͖׵͑Λͪΐͬͱ͚ͩߴ଎Խ͢Δ w SBLF ਖ਼֬ʹ͸SBLF fl BTI ͸ҎԼΛશͯॻ͖׵͍͕͔͔͑ͯͯ࣌ؒΔ 53 ໊લ આ໌
Φϑηοτ αΠζ OWT ,FZ7BMVFͳ஋͕อଘ͞ΕΔ Y Y QIZ@JOJU 1):ͱݺ͹ΕΔ8J'J΍#MVFUPPUIͷઃఆ͕อଘ͞ΕΔ YG Y GBDUPSZ ϓϩάϥϜͷόΠφϦ͕ॻ͖ࠐ·ΕΔ Y . TUPSBHF '"5ϑΝΠϧγεςϜ Y . ۭ͖ྖҬ &41ͷ'MBTIϝϞϦͷύʔςΟγϣϯςʔϒϧ ΧελϚΠζޙ ΞϓϦέʔγϣϯίʔυΛࠩ͠ସ͑Δࡍ͸ ͚ͩ͜͜ॻ͖׵͑Ε͹Α͍

5*14TUPSBHFͷॻ͖׵͑Λͪΐͬͱ͚ͩߴ଎Խ͢Δ w SBLF fl BTI@TUPSBHFΛ࢖͏ͱ TUPSBHFͷ෦෼͚ͩॻ͖ࠐΊΔ w SBLFCVJME fl BTI@TUPSBHF
w ͥͻ͝ར༻͍ͩ͘͞ 54

5*14GBDUPSZͷॻ͖׵͑λεΫ΋͋Δ w SBLF fl BTI@GBDUPSZΛ࢖͏ͱ GBDUPSZͷ෦෼͚ͩॻ͖ࠐΊΔ w SBLFCVJME fl BTI@GBDUPSZ
w ͥͻ͝ར༻͍ͩ͘͞ 55

͞ΒͳΔߴ଎ԽҊ w ىಈ࣌ʹߦ͏CJO΍FUDͷߏங w ։ൃ༻1$ͷ࣌఺ͰTUPSBHF഑Լʹஔ͚͹ Ұॹʹ'MBTIϝϞϦʹॻ͖ࠐ·ΕΔͷͰ ॳճىಈ͕͞Βʹ଎͘ͳΔ͸ͣ w ͜͜͸·ͩख͕ճ͍ͬͯͳ͍ͷͰ ίϯτϦϏϡʔτνϟϯεͰ͢🙇
56

·ͱΊ

·ͱΊ w 1JDP3VCZ͓Αͼ31&41ʹ͓͚Δ '"5ϑΝΠϧγεςϜͷϙʔςΟϯάʹ͍͓ͭͯ࿩͠·ͨ͠ w ίϯτϦϏϡʔτνϟϯε͸·ͩ·ͩ͋Γ·͢ɻ Έͳ͞·͔Βͷ1VMM3FRVFTUΛ͓଴͍ͪͯ͠·͢👍 58

͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ

Porting filesystem-fat to Another Microcontroll...

Porting filesystem-fat to Another Microcontroller: ESP32

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