Kodi UART ndi chiyani?
UART imayimira Universal Asynchronous Receiver/Transmitter. Ndi njira yolumikizirana yolumikizirana ngati SPI ndi I2C, imatha kukhala yozungulira mu microcontroller, kapena IC yokhayokha. Cholinga chachikulu cha UART ndikutumiza ndikulandila zambiri. Chimodzi mwazinthu zabwino kwambiri UART Bluetooth modules ndikuti imangogwiritsa ntchito mawaya awiri kufalitsa deta pakati pa zida.
Ma UART amatumiza deta mosasinthasintha, zomwe zikutanthauza kuti palibe chizindikiro cha wotchi yolumikizira kutulutsa kwa ma bits kuchokera ku UART kupita ku zitsanzo za bits ndi UART yolandila. M'malo mwa chizindikiro cha wotchi, UART yotumizira imawonjezera zoyambira ndikuyimitsa pa paketi ya data yomwe imasamutsidwa. Ma bits awa amatanthauzira chiyambi ndi mapeto a paketi ya data kotero kuti UART yolandirayo idziwe nthawi yoyambira kuwerenga ma bits.
UART yolandirayo ikazindikira poyambira pang'ono, imayamba kuwerenga ma bits omwe akubwera pafupipafupi omwe amadziwika kuti baud rate. Baud rate ndi muyeso wa liwiro la kusamutsa deta, lowonetsedwa mu bits pamphindikati (bps). Ma UART onsewa ayenera kugwira ntchito molingana ndi kuchuluka kwa baud. Mlingo wa baud pakati pa kutumiza ndi kulandira UART ukhoza kusiyana ndi pafupifupi ± 5% nthawi ya bits isanakwane.
Ndi mapini ati mu UART?
VCC: Pini yamagetsi, nthawi zambiri 3.3v
GND: Pini yapansi
RX: Landirani pini ya data
TX: Tumizani pini ya data
Pakalipano, HCI yotchuka kwambiri ndi UART ndi USB kugwirizana, UART nthawi zambiri imadziwika kwambiri chifukwa ntchito yake ndi mlingo wa data throughput ikufanana ndi mawonekedwe a USB, ndipo njira yotumizira ndi yophweka, yomwe imachepetsa mapulogalamu apamwamba ndipo imakhala yotsika mtengo. zonse hardware yankho.
Mawonekedwe a UART amatha kugwira ntchito ndi gawo la Bluetooth lomwe lili pashelufu.
Zonse za Feasycom Ma module a Bluetooth thandizirani mawonekedwe a UART mwachisawawa. Timaperekanso TTL serial port board yolumikizirana ndi UART. Ndizosavuta komanso zosavuta kwa opanga kuyesa zinthu zawo.
Kuti mumve zambiri za ma module a UART, mutha kulumikizana ndi gulu la Feasycom mwachindunji.
