Chii chinonzi UART?
UART inomirira Universal Asynchronous Receiver/Transmitter. Iyo serial yekutaurirana interface/protocol seSPI neI2C, inogona kunge iri dunhu remuviri mune microcontroller, kana yakamira-yega IC. Chinangwa chikuru cheUART kuendesa uye kugamuchira serial data. Chimwe chezvinhu zvakanakisisa pamusoro UART Bluetooth modules ndeyekuti inongoshandisa waya mbiri kutumira data pakati pemidziyo.
MaUART anofambisa data asynchronously, zvinoreva kuti hapana wachi chiratidzo chekuyananisa kubuda kwemabits kubva pakufambisa UART kuenda kusampuli yemabits neanogamuchira UART. Panzvimbo pechiratidzo chewachi, iyo yekufambisa UART inowedzera kutanga uye kumisa mabheti kune data pakiti iri kutamiswa. Aya mabhiti anotsanangura kutanga uye kupera kwepaketi yedata kuitira kuti UART inogamuchira izive nguva yekutanga kuverenga mabhiti.
Kana iyo UART inogashira yaona kutanga zvishoma, inotanga kuverenga mabhiti anouya pane imwe frequency inozivikanwa seye baud rate. Baud rate chiyero chekukurumidza kwekufambisa data, inoratidzirwa mumabits pasekondi (bps). Ose maUART anofanirwa kushanda pachiyero chakafanana chebaud. Iyo baud mwero pakati pekutumira uye kugamuchira maUART inogona kungosiyana ne ± 5% nguva yemabhiti isati yasvika kure.
ndeapi mapini ari muUART?
VCC: Simba rekupa pini, kazhinji 3.3v
GND: Pini yepasi
RX: Gamuchira pini yedata
TX: Tumira pini yedata
Parizvino, iyo inonyanya kufarirwa HCI ndeye UART uye USB yekubatanidza, UART inowanzo kufarirwa zvakanyanya nekuti maitiro ayo uye data throughput level inofananidzwa ne USB interfaces, uye transmission protocol iri nyore, iyo inoderedza software pamusoro uye inodhura-inoshanda. yakazara hardware mhinduro.
UART interface inogona kushanda neiyo off-the-sherufu Bluetooth module.
Zvese zveFeasycom's Bluetooth modules tsigira UART interface nekukasira. Isu tinopawo TTL serial port board yeUART kutaurirana. Zviri nyore uye zviri nyore kune vanogadzira kuti vaedze zvigadzirwa zvavo.
Nezve UART kutaurirana Bluetooth modules ruzivo, unogona kubata neFeasycom timu yekutengesa zvakananga.
