Menene UART?
UART tana nufin Universal Asynchronous Receiver/ Transmitter. Yana da tsarin sadarwa na serial/protocol kamar SPI da I2C, yana iya zama da'ira ta zahiri a cikin microcontroller, ko IC mai zaman kanta. Babban manufar UART shine watsawa da karɓar bayanan serial. Daya daga cikin mafi kyawun abubuwa game da UART Bluetooth modules shi ne kawai yana amfani da wayoyi biyu don watsa bayanai tsakanin na'urori.
UARTs suna watsa bayanai ba tare da izini ba, wanda ke nufin babu siginar agogo don aiki tare da fitarwa na ragowa daga UART mai watsawa zuwa samfurin ragowa ta hanyar karɓar UART. Maimakon siginar agogo, UART mai watsawa yana ƙara farawa da dakatar da raguwa zuwa fakitin bayanan da ake canjawa wuri. Wadannan ragowa suna bayyana farkon da ƙarshen fakitin bayanai don haka mai karɓar UART ya san lokacin da za a fara karanta rago.
Lokacin da UART mai karɓa ta gano farkon bit, yana fara karanta rago masu shigowa a takamaiman mitar da aka sani da ƙimar baud. Adadin Baud shine ma'auni na saurin canja wurin bayanai, wanda aka bayyana a cikin bits a sakan daya (bps). Dukan UARTs dole ne suyi aiki akan ƙimar baud iri ɗaya. Adadin baud tsakanin watsawa da karɓar UARTs zai iya bambanta kawai da kusan ± 5% kafin lokacin rago ya yi nisa sosai.
Menene fil ke cikin UART?
VCC: Fitin samar da wutar lantarki, yawanci 3.3v
GND: Ƙarƙashin ƙasa
RX: Karɓi fil ɗin bayanai
TX: aika fil ɗin bayanai
A halin yanzu, mafi mashahuri HCI shine haɗin UART da kebul, UART gabaɗaya ya fi shahara saboda aikin sa da matakin sarrafa bayanai sun yi daidai da mu'amalar kebul, kuma ka'idar watsawa tana da sauƙi, wanda ke rage software kan gaba kuma yana da tsada mai tsada. cikakken hardware bayani.
UART dubawa na iya aiki tare da na'urar Bluetooth a waje.
Duk na Feasycom's Na'urorin Bluetooth goyon bayan UART dubawa ta tsohuwa. Hakanan muna samar da tashar tashar tashar TTL don sadarwar UART. Yana da matukar dacewa da sauƙi ga masu haɓakawa don gwada samfuran su.
Don cikakkun bayanan sadarwa na UART na Bluetooth, zaku iya tuntuɓar ƙungiyar tallace-tallace ta Feasycom kai tsaye.
