2010/10/21

Missioon lõputöö: Päev 50

Mõned mõisted

ADC - analog to digital converter

UART - Universal asynchronous receiver/transmitter
A universal asynchronous receiver/transmitter is a type of "asynchronous receiver/transmitter", a piece of computer hardware that translates data between parallel and serial forms. UARTs are commonly used in conjunction with other communication standards such as EIA RS-232. A UART is usually an individual (or part of an) integrated circuit used for serial communications over a computer or peripheral device serial port. UARTs are now commonly included in microcontrollers.


BAUD RATE - põhimõtteliselt andmeedastuskiirus

the number of distinct symbol changes (signaling events) made to the transmission medium per second in a digitally modulated signal or a line code.


#define F_OSC - määrab MC sisemise kristalli sageduse



UBRRL ja UBRRH - USART Baud Rate registrid MC'is.



UCSRA, UCSRB and UCSRC - USART Control and Status Registers A, B and C


URSEL - USART Register Select bit
When doing a write access of this I/O location, the high bit of the value written, the USART Register Select (URSEL) bit, controls which one of the two registers that will be written. If URSEL is zero during a write operation, the UBRRH value will be updated. If URSEL is one, the UCSRC setting will be updated.


UCSZ0 - The UCSZ1:0 bits combined with the UCSZ2 bit in UCSRB sets the number of data bits(character size) in a frame the Receiver and Transmitter use.



RXEN - lubab USART (serial porti) andmete vastuvõtmise



TXEN - lubab USART (serial porti) andmete saatmise



RXCIE - lubab RX interrupt'id

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