Yini i-UART?
I-UART imele i-Universal Asynchronous Receiver/Transmitter. Kuyisixhumi esibonakalayo/iphrothokholi yokuxhumana efana ne-SPI ne-I2C, ingaba isekethe ebonakalayo kusilawuli esincane, noma i-IC ezimele yodwa. Inhloso enkulu ye-UART ukudlulisa nokwamukela idatha ye-serial. Enye yezinto ezinhle kakhulu mayelana UART Bluetooth amamojuli ukuthi isebenzisa izintambo ezimbili kuphela ukudlulisa idatha phakathi kwamadivayisi.
Ama-UART adlulisa idatha ngokuvumelanayo, okusho ukuthi ayikho isignali yewashi yokuvumelanisa okukhiphayo kwezingcezu kusuka ku-UART yokudlulisela kuya ekuthathweni kwezilinganiso zamabhithi nge-UART eyamukelayo. Esikhundleni sesignali yewashi, i-UART yokudlulisa yengeza izingcezu zokuqala nokumisa kuphakethe ledatha elidluliswayo. Lezi zingcezu zichaza isiqalo nesiphetho sephakethe ledatha ukuze i-UART eyamukelayo yazi ukuthi kufanele iqale nini ukufunda izingcezu.
Uma i-UART eyamukelayo ithola isiqalo, iqala ukufunda izingcezu ezingenayo ngefrikhwensi ethile eyaziwa ngokuthi yi-baud rate. Isilinganiso se-Baud isilinganiso sejubane lokudluliswa kwedatha, esivezwa ngamabhithi ngomzuzwana (bps). Womabili ama-UART kufanele asebenze cishe ngezinga elifanayo le-baud. Izinga le-baud phakathi kwama-UART adluliselayo nawamukelayo lingahluka kuphela cishe ngo-±5% ngaphambi kokuthi isikhathi sebhithi sihambe kakhulu.
yiziphi izikhonkwane ezise-UART?
I-VCC: Iphinikhodi yokunikeza amandla, ngokuvamile i-3.3v
GND: Iphinikhodi yaphansi
I-RX: Thola iphinikhodi yedatha
TX: Dlulisa iphinikhodi yedatha
Njengamanje, i-HCI ethandwa kakhulu ukuxhumana kwe-UART ne-USB, i-UART ivame ukuthandwa kakhulu ngenxa yokuthi ukusebenza kwayo kanye nezinga lokuphuma kwedatha liqhathaniswa nezixhumi ezibonakalayo ze-USB, futhi i-protocol yokudlulisela ilula, enciphisa i-software ephezulu futhi iyonga kakhulu. isixazululo esigcwele sehadiwe.
Isixhumi esibonakalayo se-UART singasebenza nemojuli ye-Bluetooth engaphandle kweshalofu.
Konke ku-Feasycom Amamojula e-Bluetooth sekela isikhombimsebenzisi se-UART ngokuzenzakalela. Siphinde sinikeze ibhodi le-TTL serial port yokuxhumana kwe-UART. Kulula kakhulu futhi kulula ukuthi onjiniyela bahlole imikhiqizo yabo.
Ngemininingwane yamamojula e-Bluetooth okuxhumana kwe-UART, ungaxhumana nethimba labadayisi be-Feasycom ngokuqondile.
