Maxim-integrated MAXQ Family Users Guide: MAXQ8913 Supplement Manual de usuario descargar pdf (Pagina 45)

MAXQ Family User’s Guide:

MAXQ8913 Supplement

10-2

;==============================================================================

;= TxChar - Outputs a character to serial port.

;= Inputs : Acc - Character to send.

TxChar:

move SBUF, Acc ; Send character

TxChar_Loop:

move C, SCON.1 ; Check transmit flag

sjump NC, TxChar_Loop ; Stall until last transmit has completed

move SCON.1, #0 ; Clear the transmit flag

ret

;==============================================================================

;= RxChar - Receives a character from serial port.

;= Outputs : Acc - Character received.

RxChar:

move C, SCON.0 ; Wait for receive flag to be set to 1

sjump NC, RxChar

move Acc, SBUF ; Get received character

move SCON.0, #0 ; Clear receive interrupt flag

ret

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Maxim-integrated MAXQ Family Users Guide: MAXQ8913 Supplement Manual de usuario Pagina 45