电子存包柜--英文.doc

Ｄｅsign ｏf ｅlｅctronｉc sｔoraｇe caｂineｔ　baseｄ ｏn RTOS Smａll
Dｅｐartｍent　oｆ elｅctroｎics anｄ　coｍｍunicatioｎ eｎgineｅring, PSＧ coｌlege,　Ｃoimｂatore　Indｉa
Abstract:Ｔhｉs　ｐａｐｅr iｎtroduces thｅ desiｇn ｐｒiｎciplｅ　of　tｈe　electroｎiｃ　storaｇe　ｃontrol syｓtem based on RＴOS Small, and ｉnｔrｏduｃes　thｅ system　useｄ　ｉn this　system to　make the controller,　which caｎ　maｎage　ｔｈe　N storage caｂinｅt ａt the same time、 The　ｄｏoｒ locｋ　ｉs　conｔroｌled bｙ tｈe　electrｏmａgnetｉc valve, wｈen　ｃｕｓtomerｓ nｅed to saｖe the　package, cａn go to ｔｈe ｌockers ｂｅforｅ pｒess thｅ　"open" ｂｕtton, the　microcｏnｔrolｌeｒ recｅｉｖｅs a pulse sigｎal,　aｎd the sｙstem I/O ｐort　ｔo　send cｏrrespｏndiｎｇ ｓｉgnａls　to cｏntｒol　the eleｃtromａgnｅｔｉc ｖａlve　lｏck ｄoor wiｌl be an　emptｙ　ｂox is　ｏｐeneｄ, the cuｓｔｏmer ｃａn ｓａve thｅ pacｋagｅ anｄ tｈe door shut、 Wｈｅｎ ｔhｅ ｃustomｅｒ nｅeds ｔo　ｔakｅ　the ｐaｃｋaｇe, ｗill aｓ　ｌonｇ aｓ ｔhe baｒ　codｅ pｌａcｅd　in　front of thｅ bａr cｏｄe　rｅaｄer, barcｏde ｒｅadeｒ　ｂar coｄe ｉnformａtiｏｎ ｃolｌected ｂｙ　tｈｅ outｐut ｖoltage　sｉgnａｌ correspoｎｄｉｎｇ　tｏ the　mｉcrｏconｔrｏllｅr,　the pasｓｗorｄ　system is rｅlatiｖely cｏｎsisｔent, send out sigｎaｌｓ tｏ tｈｅ ｓｏleｎoiｄ valve ｉs open, tｈe customer caｎ remoｖｅ ｔhe　ｐａckａｇｅ、
Ｋｅy woｒds:Smａll　RTOS;ｅlecｔronic ｓtorage cabineｔ;　ｓａve ｐacｋaｇe
１、Iｎtroducｔion
RTOS ＲAM　Smａll　ｄemand　ｆoｒ smaｌｌ,　verｙ　ｓuitａbｌe　fｏｒ ｓuch ａ relativｅly smａll ｒeｓouｒces of the　systeｍ、 RTOS has　a multi ｔａskiｎg, strong rｅａl-ｔime, ａｎd　can be ｒeｄｕced ｔo ｔhe　kerｎel, ｍaking ｔhe dｅsｉｇn ｏf　reａl-time　apｐlications, expansion and maｉnｔenance ｅasｉer. The inｔｒoduｃtiｏn ｏｆ　ｔhe iｄｅa oｆ ＲTOS, iｎsｔeａd of　tｈｅ　traditional softwarｅ　deｓign　meｔｈod,　ｓo ｔhat iｔ iｓ ｎｏ lｏnｇer ａ singｌe　ｔhread　sｔruｃｔurｅ, thｒough ｔｈe ａpplicatioｎ iｓ divｉded intｏ sｅｖeral ｉndepｅnｄeｎt taｓks,　ＲＴＯS　makes　ｔhｅ　dｅsｉｇｎ proｃesｓ of applicatiｏn sysｔem is　ｓiｍpｌifiｅd、 Ｉn thｉs　paper,　tｈｅ soｆｔware　desiｇｎ of eｌｅctｒoniｃ ｓｔｏraｇe ｃａｂｉneｔ basｅｄ　on　siｎglｅ ｃｈiｐ miｃroｃoｍputer　iｓ biｎed,　tｈｅ　ｄesｉgn idea of RＴOS　Smalｌ and the ａpplicatｉon of mesｓage queue cｏmmunication ｍeｃｈａｎｉsm are brｉｅflｙ anaｌyｚeｄ。
１.1 basic prｉｎciples　of RTＯS51　Small
RTOS51 Ｓmａｌl　is a very smaｌl ｋｅrnel, fullｙ inteｇｒated in the C５1 KEＩL　ｃoｍpilｅr, oｎly take lｅss ｍeｍorｙ　spacｅ, you ｃａn ruｎ iｎ the　51　single　chiｐ　micｒoｃｏmｐutｅr systeｍ wｉthout eｘｔｅrnａl daｔa　memoｒｙ、 Tｈｅ kerｎel is ｒespｏnsible　ｆor ｉniｔiａｌｉｚiｎg and opeｎ, ｏther taskｓ ｓcheduling sｙstem, aｃcoｒding to ｔhｅ priorｉty oｆ tasｋs, a reａsonable disｔributioｎ of CPU ｉn dｉffeｒeｎt tｉｍe　beｔwｅｅｎ　ｔasｋｓ, the kernel　caｎ generally　prｏvide　tasｋ scheｄulｉｎｇ anｄ inｔｅrｒupｔ service funｃtｉon、 A progrａm ａｎｄ　a task, thｅ tａｓk of　eaｃh　sｅpａrate,　inｄepｅｎdent　iｍpｌeｍentatioｎ oｆ ｔhe　ｐarｔ　called thrｅａd。 Aｌl eｖent ｄｒiveｎ　and time ｄriｖen are reｆlecteｄ in the　ｓｅｔtings of tｈe　coｒreｓpoｎdinｇ ｔａsk iｄeｎtificaｔion ａnd　tｈreａd iｄentifｉcaｔion. Whｅn the hardｗare envｉronment, on　thｅ ｂasis of the　ｉdｅntifｉcation, by arｒａｎgｉng thｅ ｓystｅｍ intｅrｒupt　anｄ　task ｓcheduling　algorithm adjust the ｒｅspoｎse, bｙ using tｈｅ metｈｏd of ｓettiｎg up eｎvirｏnmeｎtａｌ variableｓ, whicｈ can　interruｐt ｅxｉt　after　retuｒn ｔo ａnｙ　ｍore tｈan one　sｅt of eｎtｒaｎcｅ ｉn onｅ to peｒｆorm ａnｄ effectiｖelｙ　solｖeｓ　the　kｅy prｏbｌeｍ of　flｅxiblｅ sｗitｃhｉｎg ｏf fｏregrｏuｎd ａｎｄ backｇｒoｕnd tasks tｈreａd。 RTＯS Small 51 uｓeｒ tａskｓ with a　ruｎning staｔe, ｒｅadｙ state, wait and sｕspenｄ, iｎteｒrｕpt servicｅ　pｒoｇram。 At any mｏｍent,　the stａｔe of　ｔhe task iｓ　onｅ of tｈese fｏur states。 Ｉn orｄeｒ to　sａve　meｍｏry ｃrｅａte and　dｅｌeｔe ｍｉssioｎ　ＯS dynaｍic,　wｉth ｔhe ｆunｃｔion OＳＳＴARＴ ()　ｔo stａｒt a mｕｌtｉ taskiｎg envｉrｏnmeｎｔ, OS　toｏｋ ａlｌ thｅ ｔasks set up, and set　ｔhem aｓ　the ｒeaｄy statｅ, thｅ hｉgheｓｔ prｉority　ｔaｓk to run。 Ｏnly when all　the priority iｓ hiｇher thａｎ itｓ task tｏ waｉt。 Rｅaｄy tｏ　ｅｎｔeｒ a staｔｅ of ｏｐerａｔion。 The ｓｃheduｌｅr will ｂｅ ｔhe toｐ pｒiｏrｉty ｏf thｅ task ｒeaｄy　lisｔ　as the　ｎexｔ ｔasｋ to ｂe ｐeｒforｍed。
Tａsｋ ｃalｌ os_wait funｃtｉon, ｐending the currｅnt ｔasｋ,　waiｔing ｆoｒ one　or sｅveｒaｌ　intervａls (Ｋ_IVL), time　out　(K_TMO), signａl　(Ｋ＿SIＧ) events、　Ｉf wａitinｇ　foｒ evenｔ　ｈas ocｃurred,　coｎtinue to ｉmplement thｅ current task;　ｉf wａｉtｉnｇ fｏｒ events　dｉd nｏt　occｕr,　the correｓponding　ｗaiting　sign, suｓｐｅnd　ｔhe tａsｋ tｏ tａｓk switchiｎg　progrａm segｍｅnt switｃh　tｏ the　next task、
Smalｌ RＴOS51　(init) ｂy　ｐｅｒｆorming a fuｎction tｏ ｒegister initialization, ｃalｌ ｔhｅ fｕnctiｏn OＳSTａrt () ｔo ｉniｔialize eacｈ　task ｓtａｃｋ ａnd perfｏrm ｔhe firsｔ task,　anｄ the choice　of tｈe first tａsk　fｏr ｔhｅ reａｓon ｔｈａt tｈe ｔask ｐriority ｌevel.　Iｎ the selｅｃｔion ｐｒoceｓs　ｔo ｃomｐlｅte tｈe tａsk ｏf scheｄｕlｉng、
1、2 ｃommuniｃation ｂｅtwｅｅn　taｓｋs
muｎication beｔween　tasks usiｎｇ　the mesｓａge　quｅue, aftｅr 3 stｅps: to　cｒeａtｅ a meｓsage　queue OSＱCrｅate (),　tｏ　the messagｅ qｕｅｕe mｅｓsage OSQPｏｓt (), ｔａkｅ meｓsａｇe　ＯSQPeｎd ()、 Call tｈe OSＱPosｔ ()　fｕnctｉon to ｓend　ｔhe　meｓsage,　ｉf ｙｏｕ already have ａ　ｔaｓk waiting for　the ｍeｓsage, ｉmmedｉａtely　ｔuｒn tｏ wait　for ｔhｅ newｓ tａsk, if the mesｓage　ｑuｅｕe　ｉs fuｌl, ｉs unable tｏ ｄelｉver　tｈe ｍessage,　ｒeｔurn　aｎ ｅrror、　Ｉf tｈe message　queｕe ｉs not ｆｕll, ｂut thｅre is no otｈｅr tａsk　ｗaiｔing　ｆｏｒ ｔｈｅ mｅssaｇe, thｅn.　Iｔ ｉｓ　wortｈ noting that, when tｈe queuｅ　iｓ full, tｈe　fuｎｃtion　ｄoes　noｔ　suspenｄ ｔhｅ currｅnt　ｔask, so ｃaｌl　the fuｎctiｏn　of thｅ　tasｋ shoulｄ　bｅ　ｊudgeｄ to rｅtuｒｎ tｈｅ　condition,　if the messａgｅ is full,　it　should bｅ　huｎg froｍ thｅ curｒent task、　When ｒeｃeiviｎg a mｅssagｅ, if the ｍeｓｓａge quｅue　is emｐty, the tａsｋ　of takinｇ ｔhe ｍessaｇe will be sｕspｅndeｄ until a ｍｅsｓage　iｓ　received iｎ ｔｈｅ ｍeｓsaｇe queue。
２. Ａｐplicaｔiｏn exａmｐles
2。1Hardｗare platfｏrm
 　 Ｆor example, ｔhe sｙstem ｂloｃk dｉａgrａm is　as folｌｏws。

 The　electroniｃ　sｔorage ｃaｂｉnet　can contrｏl　thｅ　maxiｍum ｎumｂｅr　of goods stoｒaｇe bｏx　iｓ ３2, diｖideｄ　ｉｎto aｂｏut 16 boxes, ｔｈe　pｉｃture oｎlｙ　draw　１6 ｒｏａｄ conｔroｌ。 Control　cｈip　usiｎg AT8９C55 miｃrocｏnｔrｏller, witｈ　real-time clock moｄule, ｂar code readeｒ, liquiｄ ｃrｙstal disｐlay ｍodule, thｅｒｍａl　printer coｍpositioｎ, designed to ｔhree PCＢ board.
１ master ｃｏｎtｒol　boaｒd, the　ｕsｅr's storage ａnｄ acｃｅss ｔo　the usｅr intｅrface, sａｖe the ｐａckagｅ passwoｒd, diｓpｌay　thｅ ｕser access ｔo　tｈｅ　pasｓword ｉｎ tｈｅ pｒocｅsｓ　ｏf ｔhe ｐassworｄ　input ａnｄ ｔhe state of all 32、
The 2　door conｔｒol panel　ｉs posed　of　three ｐａｒtｓ,　thｅ ｆｉrsｔ part of tｈe box　ｉs ｄｅｔected, inclｕdiｎｇ 16 iｎfrared ｄetectiｏｎ ｉｎput, １6　wａy infｒａred ｅｍissioｎ conｔrol　drｉve.　The secoｎd part oｆ the 16 ｒoaｄ　ｒelaｙ ｃontrol box ｉs cｏntrolled by　16 small DC　ｍotｏr constitute open 1６ bｏx controｌ、　In　ｔhe ｔhirｄ ｐaｒｔ, the　sｔatus oｆ　ｔｈe　box door　is detecteｄ, ａｎd the ｏｐeｎinｇ / closing　of ｔhe 1６ boxes iｓ ｄetectｅd、
3 accesｓ paｃkaｇe　ｂａrcoｄe printing, voiｃe promｐt, the whole sｙsｔem is cｏmposed ｏｆ 4　ｓｉnｇｌｅ cｈip wiｔh the MCU ｃontrｏl ｗork, oｐeration　management　paｃｋaｇe　users and　ｒeｃord tｈe histoｒｙ paraｍeters, tｈeｎ sｅnｄs ｍaｎdｓ tｏ　the microcontｒｏller the distｒibuｔiｏn of empty cｏnｔainer　and　pｒiｎt ｏｕt　the pａｃkaｇe, tｏ the useｒ。
2、2 sｏftwaｒe ｄesign
Ｔhe ｅlectroｎic storaｇe caｂineｔ　mａinｌy coｍｐｒｉｓeｓ a　ｋey proｃｅssing module, a　ｄisplaｙ proｃesｓｉng mｏdｕle and a　cｏｍmunｉcaｔiｏn　pｒocessiｎｇ ｍｏｄｕle、 Tｈereｆｏrｅ, the ｔasｋ cａｎ be divｉｄed　ｉntｏ　key disｐlay, ｒｅceｉve　ｄaｔa, maｎd procesｓiｎｇ,　ｓeｎｄing datａ　aｎd othｅr ４ ｔaskｓ。
Tｈe　miｃrocontroｌler reｃeiｖes thｅ ｕsｅr　ａcｃｏｒdｉng ｔo the　packaｇｅ to enteｒ　a　ｐasｓword, password ａnd key　pｒoｃｅssｉng, dｉsplaｙ ｂox ｄiｓplay, send oｕt mａｎds fｏr eｘample,　illｕstrate the main　ｄesｉgn　idea、
Aftｅr thｅ system initｉalｉzａtion, tｈe　arｔｉcle uses ｆuｎction OＳSTarｔ () to ｓeｔ up a　ｍulti ｔaｓk eｎviｒonment,　seｔ up ｔhe tasｋ staｃｋ fｏr　each task, aｎd successfuｌly　set up　4 taskｓ, ｗaiｔｉng　foｒ the wakｅ　of the ｃorｒesponding task、 Uｓｅrs onｌｙ need tｏ deｆｉnｅ functｉonｓ　they　ｗant　ｔo　achieve for thｅ mission, declａred in ｔhe Ｃoｎfｉg。h ｔask　function name　aｎｄ its ｐriｏrｉｔy, and tｈe　nｕｍｂｅr ｏｆ ｔｈeir　code can be,　no trａｄitiｏnａｌ prｏｇrａmmiｎg　under the　kiｎd of gｅｎeral rｅlaｔｉons, the syｓｔeｍ wｉll auｔｏｍaticaｌly　run ｔhe codｅ、 RTOＳ51 Ｓmal　tｒansplaｎtation ｉｓ mａiｎly　cｏｎｆigurｅd　OS-CＰＵ、H, OＳ_CFG、Ｈ and CＯＮＦIG、Ｈ thｒee　ｆｉles, whｅｒe the OS_CFＧ、H　 mainly useｄ for tｈe oｐerating system and the　rｅducｔiｏn of　the clｏcｋ and ｏther rｅlａｔｅd configurａtｉon、
Dｅfiｎe 4　tasks in tｈｅ CONFIG。h filｅ、
＃ifneｄf。、、、、
、。、、。、、
＃endif

Lｉmiｔed to ｔhｅ lｅngth oｆ the singｌe chip mｉcｒoｐuter to　sｅnd　anｄ receive ｄaｔa procedurｅｓ、
3. Suｍｍａry
The　real-timｅ multi task　ｏpｅratiｎg syｓtem　makes ｐroｇrａmming　more efficient, maintｅnance ａnd modificatioｎ mｏｒe　conｖｅnｉｅnt, so　ｉｔ is widely uｓed at preｓeｎt,　ｅｓｐｅcｉally　in ｔhe emｂedded　sｙstem。 Ａt the lｏw　end　of ｔhe 51 ｓingｌｅ　chip　ａpｐliｃａtion, the　ｕse　of real—tiｍｅ mulｔi　tasking　ｏperａｔing syｓteｍ, using　RＴOS Sｍall　multi taｓking pｌaｔfｏrm for system aｐｐlicatｉon ｄesign aｎｄ　imprｏvement, also haｓ ｐracｔical siｇnｉfiｃance、
Ｉn this　paper, the iｎｎoｖａｔion poiｎts: ｔhe ideａ　oｆ RＴＯS Small　multi　ｔask　apｐｌicａtiｏｎ　in a speciｆiｃ ｓiｎｇlｅ chiｐ micｒｏputer control electｒonic stoｒａge cabinｅt sｙstem software desｉgn, tｈe meｓsａge quｅue ｂased　on the　ｔask of ｃｏｍmunｉcaｔioｎ programmｉng metｈod。
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