{"id":1393,"date":"2022-01-23T16:37:22","date_gmt":"2022-01-23T15:37:22","guid":{"rendered":"https:\/\/ok2jnj.ok2kld.cz\/ok2jnj\/?p=1393"},"modified":"2022-01-24T19:54:21","modified_gmt":"2022-01-24T18:54:21","slug":"stm32-poznamky-zacatecnika","status":"publish","type":"post","link":"https:\/\/ok2jnj.ok2kld.cz\/ok2jnj\/cs\/2022\/01\/stm32-poznamky-zacatecnika\/","title":{"rendered":"STM32 – pozn\u00e1mky za\u010d\u00e1te\u010dn\u00edka"},"content":{"rendered":"\n

B\u011bhem seznamov\u00e1n\u00ed se s\u00a0procesory je pot\u0159eba pochopit strukturu dokumentace, naj\u00edt vhodn\u00e9 aplikace k\u00a0programov\u00e1n\u00ed a z\u00edskat n\u00e1vyky pro jejich rutinn\u00ed pou\u017e\u00edv\u00e1n\u00ed. V\u00a0t\u00e9to skupin\u011b \u010dl\u00e1nk\u016f je p\u00e1r pozn\u00e1mek k\u00a0m\u00fdm za\u010d\u00e1tk\u016fm. Text je ps\u00e1n jako p\u0159echod od osmibitov\u00fdch procesor\u016f spole\u010dnosti Atmel k\u00a032-bitov\u00fdm procesor\u016fm STM z pohledu \u010dlov\u011bka, kter\u00fd m\u00e1 programov\u00e1n\u00ed jako kon\u00ed\u010dek.<\/p>\n\n\n\n

Pro\u010d zrovna STM32? Cht\u011bl jsem se sezn\u00e1mit s procesory, kter\u00e9 budou dostupn\u00e9 v pouzdrech LQFP, abych je mohl ru\u010dn\u011b p\u00e1jet do sv\u00fdch desek. STM32 obsahuje obrovskou skupinu obvod\u016f, jejich\u017e cena za\u010d\u00edn\u00e1 na 40K\u010d a lze jimi nahradit ATmega8 a kon\u010d\u00ed v\u00fdkonn\u00fdmi obvody, kter\u00e9 pracuj\u00ed na 480MHz a obsahuj\u00ed spoustu vnit\u0159n\u00edch periferi\u00ed. Cht\u011bl jsem v\u00fdvojov\u00e9 prost\u0159ed\u00ed, ve kter\u00e9m bude mo\u017en\u00e9 prov\u00e1d\u011bt debuggov\u00e1n\u00ed, sledovat b\u011bh programu. STM32 se sv\u00fdmi LL knihovnami nab\u00edz\u00ed mo\u017enost programovat na \u00farovni registr\u016f a hardware, nebo lze do projektu zapojit HAL knihovny, d\u00edky kter\u00fdm se hardware schov\u00e1. Dokonce je mo\u017en\u00e9 tyto dva p\u0159\u00edstupy kombinovat a m\u00edt v jednom projektu oboj\u00ed.<\/p>\n\n\n\n

Na za\u010d\u00e1tku pr\u00e1ce je pot\u0159eba nastavit vlastnosti periferi\u00ed procesoru, kter\u00e9 budeme pot\u0159ebovat v pl\u00e1novan\u00e9 aplikaci. Osmibitov\u00e9 procesory Atmel maj\u00ed pro ka\u017edou svoji periferii n\u011bkolik registr\u016f, popsan\u00fdch v datov\u00e9m listu procesoru. Nap\u0159\u00edklad I\/O port ATmega16 m\u00e1 dva registry, lze nastavit vstup \/ v\u00fdstup \/ pull-up rezistor. Popis je jednoduch\u00fd, nastaven\u00ed lze prov\u00e9st ru\u010dn\u011b.<\/p>\n\n\n\n

U STM32 jsou pro nastaven\u00ed univerz\u00e1ln\u00edho I\/O portu pot\u0159eba \u010dty\u0159i registry, dal\u0161\u00ed registry jsou nutn\u00e9 pro nastaven\u00ed hodinov\u00e9ho sign\u00e1lu aby bylo mo\u017en\u00e9 alespo\u0148 rozblikat LED diodu. Popis registr\u016f je v referen\u010dn\u00edm manu\u00e1lu, ale i nejm\u00e9n\u011b v\u00fdkonn\u00e9 procesory, nap\u0159. STM32F0 maj\u00ed manu\u00e1l s 1000 stranami, tak\u017ee cesta k prvn\u00edmu programu by byla hodn\u011b dlouh\u00e1. P\u0159itom sta\u010d\u00ed mal\u00e1 chyba a procesor v\u016fbec neza\u010dne pracovat. Tak\u017ee bude lep\u0161\u00ed nechat registry nastavit automaticky, programem STM32CubeMX.<\/p>\n\n\n\n

STM32CubeMX<\/h3>\n\n\n\n

STMmicroelectronics m\u00e1 pro po\u010d\u00e1te\u010dn\u00ed konfiguraci projektu n\u00e1stroj STM32CubeMX. Ten je, podobn\u011b jako ostatn\u00ed mnou pou\u017e\u00edvan\u00e9 programy k dispozici zdarma na str\u00e1nk\u00e1ch www.st.com<\/a>. Jenom je pot\u0159eba se zaregistrovat.<\/p>\n\n\n\n

P\u0159i instalaci je pot\u0159eba zvolit adres\u00e1\u0159 Workspace, to je m\u00edsto, kde budou ulo\u017eeny projekty.<\/p>\n\n\n\n

STM32CubeMX vytvo\u0159\u00ed strukturu adres\u00e1\u0159\u016f pro nov\u00fd projekt, p\u0159iprav\u00ed knihovny pro po\u010d\u00e1te\u010dn\u00ed inicializaci a ovl\u00e1d\u00e1n\u00ed periferi\u00ed procesoru. Pracovn\u00ed adres\u00e1\u0159 by nem\u011bl b\u00fdt moc hluboko v adres\u00e1\u0159ov\u00e9 struktu\u0159e, aby nevznikaly probl\u00e9my s dlouh\u00fdmi n\u00e1zvy.<\/p>\n\n\n\n

Podrobn\u011bj\u0161\u00ed popis je v \u010dl\u00e1nku STM32CubeMX – prvn\u00ed projekt<\/a>.<\/p>\n\n\n\n

STM32CubeIDE<\/h3>\n\n\n\n

Dal\u0161\u00edm programem, kter\u00fd je pot\u0159eba nainstalovat, je v\u00fdvojov\u00e9 prost\u0159ed\u00ed pro STM32.<\/p>\n\n\n\n

Vyzkou\u0161el jsem Visual Studio Code. To je univerz\u00e1ln\u00ed n\u00e1stroj pro psan\u00ed program\u016f v r\u016fzn\u00fdch jazyc\u00edch pro r\u016fzn\u00e1 za\u0159\u00edzen\u00ed. Pro pr\u00e1ci s STM32 je nutn\u00e9 jej konfigurovat, nainstalovat n\u011bkolik plugin\u016f. To se mi nepoda\u0159ilo.<\/p>\n\n\n\n

Dal\u0161\u00ed mo\u017enost\u00ed je Keil, kter\u00fd je zdarma pro 32kB p\u0159elo\u017een\u00e9ho k\u00f3du.<\/p>\n\n\n\n

STM m\u00e1 na sv\u00fdch str\u00e1nk\u00e1ch k dispozici Atollic studio a STM32CubeIDE. Oba programy jsou postaveny na Eclipse, p\u0159itom STM32CubeIDE bude nejsp\u00ed\u0161 podporov\u00e1no dlouhodob\u011b. Proto jej budu pou\u017e\u00edvat.<\/p>\n\n\n\n

Podrobn\u011bj\u0161\u00ed popis je v \u010dl\u00e1nku STM32CubeIDE<\/a>.<\/p>\n\n\n\n

STM32CubeProgrammer<\/h3>\n\n\n\n

Posledn\u00ed program, kter\u00fd se ob\u010das hod\u00ed, je STM32CubeProgrammer. Ono to vypad\u00e1, \u017ee v\u0161echny vlastnosti procesoru lze nastavit v STM32Cube a registry pojistek (fuse) zn\u00e1m\u00e9 z ATmega zmizely. N\u011bkter\u00e9 vlastnosti, nap\u0159. BOR_Level, \u00farove\u0148 nap\u00e1jec\u00edho nap\u011bt\u00ed, p\u0159i kter\u00e9m dojde k aktivaci resetu z\u016fstaly. Registry pojistek se tady jmenuj\u00ed Option bytes. P\u0159i prvn\u00edch pokusech s v\u00fdvojovou deskou nebude pot\u0159eba se t\u00edmto zab\u00fdvat.<\/p>\n\n\n\n

Dokumentace k procesor\u016fm<\/h3>\n\n\n\n

Ke ka\u017ed\u00e9mu procesoru existuje datov\u00fd list, tam toho na rozd\u00edl od datov\u00fdch list\u016f Atmel o programov\u00e1n\u00ed moc nen\u00ed.<\/p>\n\n\n\n

Popis procesoru z pohledu program\u00e1tora je v referen\u010dn\u00edm manu\u00e1lu, jde o rozs\u00e1hl\u00fd dokument a pro listov\u00e1n\u00ed v n\u011bm pou\u017e\u00edv\u00e1m STM32Cube.<\/p>\n\n\n\n

Seznam knihoven a jejich popis je v dokumentu Description of STM32F0 HAL and low-layer drives. Tento dokument je platn\u00fd v\u017edy pro jednu s\u00e9rii procesor\u016f, nap\u0159. F0, F1, F4\u2026<\/p>\n\n\n\n

M\u016fj hardware<\/h3>\n\n\n\n

STM m\u00e1 pro sezn\u00e1men\u00ed s procesory dv\u011b \u0159ady v\u00fdvojov\u00fdch desek, Discovery a Nucleo. Ob\u011b desky maj\u00ed krom\u011b hlavn\u00edho procesoru je\u0161t\u011b men\u0161\u00ed STM32, ve kter\u00e9m je naprogramov\u00e1n program\u00e1tor ST-LINK. Tak\u017ee nen\u00ed pot\u0159eba m\u00edt mezi PC a v\u00fdvojovou deskou program\u00e1tor, jako byl nap\u0159. AVR Dragon u Atmelu.<\/p>\n\n\n\n

J\u00e1 m\u00e1m desti\u010dku 32F072BDISCOVERY, cht\u011bl jsem vyzkou\u0161et pr\u00e1ci s dotykov\u00fdm senzorem, pou\u017e\u00edvan\u00fdm nap\u0159. v induk\u010dn\u00edch desk\u00e1ch.<\/p>\n\n\n\n

Dal\u0161\u00ed deskou s v\u00fdkonn\u011bj\u0161\u00edm procesorem je NUCLEO-F446RE. Z t\u00e9to desky lze ulomit program\u00e1tor ST-LINK a pou\u017e\u00edvat jej pro programov\u00e1n\u00ed obvod\u016f na mnou navr\u017een\u00fdch desk\u00e1ch.<\/p>\n\n\n\n

K programov\u00e1n\u00ed vlastn\u00edch aplikac\u00ed jsem si pozd\u011bji koupil program\u00e1tor ST-link\/V2.<\/p>\n","protected":false},"excerpt":{"rendered":"

B\u011bhem seznamov\u00e1n\u00ed se s\u00a0procesory je pot\u0159eba pochopit strukturu dokumentace, naj\u00edt vhodn\u00e9 aplikace k\u00a0programov\u00e1n\u00ed a z\u00edskat n\u00e1vyky pro jejich rutinn\u00ed pou\u017e\u00edv\u00e1n\u00ed.<\/p>\n","protected":false},"author":1,"featured_media":1410,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[250],"tags":[164],"class_list":["post-1393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stm32","tag-stm32"],"yoast_head":"\nSTM32 - pozn\u00e1mky za\u010d\u00e1te\u010dn\u00edka - Franti\u0161ek Posp\u00ed\u0161il<\/title>\n<meta name=\"description\" content=\"B\u011bhem seznamov\u00e1n\u00ed se s\u00a0procesory je pot\u0159eba pochopit strukturu dokumentace, naj\u00edt vhodn\u00e9 aplikace k\u00a0programov\u00e1n\u00ed a z\u00edskat n\u00e1vyky pro jejich rutinn\u00ed pou\u017e\u00edv\u00e1n\u00ed.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ok2jnj.ok2kld.cz\/ok2jnj\/cs\/2022\/01\/stm32-poznamky-zacatecnika\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"STM32 - 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