Yintoni i-UART?
I-UART imele i-Universal Asynchronous Receiver/Transmitter. Lunxibelelwano lwe-serial interface / iprotocol efana ne-SPI kunye ne-I2C, ingaba yisekethe yomzimba kwi-microcontroller, okanye i-IC ezimeleyo. Eyona njongo ye-UART kukuhambisa nokufumana idatha yothotho. Enye yezinto ezilungileyo malunga Iimodyuli ze-UART zeBluetooth kukuba isebenzisa iingcingo ezimbini kuphela ukuhambisa idatha phakathi kwezixhobo.
Ii-UARTs zihambisa idatha ngokulandelelanayo, okuthetha ukuba akukho mqondiso wewotshi ukungqamanisa imveliso yeebits ukusuka kwi-UART yokuhambisa ukuya kwisampulu yamasuntswana yi-UART eyamkelayo. Endaweni yesignali yewotshi, i-UART ethumelayo yongeza isiqalo kunye nokumisa amasuntswana kwipakethi yedatha egqithiselwayo. La masuntswana achaza isiqalo kunye nesiphelo sepakethe yedatha ukuze i-UART efumanayo yazi ukuba ingaqala nini ukufunda amasuntswana.
Xa i-UART efumanayo ifumanisa isuntswana lokuqala, iqala ukufunda amasuntswana angenayo kwifrikhwensi ethile eyaziwa ngokuba yireyithi ye-baud. Izinga le-Baud ngumlinganiselo wesantya sokudluliselwa kwedatha, echazwe kwiibits ngesekhondi (bps). Zombini ii-UARTs kufuneka zisebenze malunga nezinga elifanayo le-baud. Izinga le-baud phakathi kothumelo kunye nokufumana ii-UARTs linokwahluka kuphela malunga ne-±5% phambi kokuba ixesha lebits libe kude kakhulu.
zeziphi izikhonkwane ezikwi-UART?
I-VCC: I-pin yokubonelela ngombane, ngokuqhelekileyo i-3.3v
GND: Iphini eliphantsi
RX: Fumana iphini yedatha
TX: Thumela iphini yedatha
Okwangoku, i-HCI ethandwa kakhulu yi-UART kunye noxhulumaniso lwe-USB, i-UART ngokubanzi ithandwa kakhulu ngenxa yokuba ukusebenza kwayo kunye nenqanaba lokuhamba kwedatha lifaniswa ne-interfaces ye-USB, kwaye i-protocol yokuhambisa ilula, enciphisa i-software engaphezulu kwaye ineendleko ezingaphezulu. isisombululo esipheleleyo sehardware.
I-interface ye-UART inokusebenza kunye nemodyuli yeBluetooth engaphandle kweshelufu.
Zonke zeFeasycom's Iimodyuli zeBluetooth xhasa ujongano lwe-UART ngokungagqibekanga. Sikwabonelela ngebhodi ye-TTL ye-serial port yonxibelelwano lwe-UART. Iluncedo kakhulu kwaye kulula ukuba abaphuhlisi bavavanye iimveliso zabo.
Kunxibelelwano lwe-UART yeenkcukacha zeemodyuli zeBluetooth, ungaqhagamshelana neqela lokuthengisa leFeasycom ngokuthe ngqo.
