Users Guide: MAXQ8913 Supplement User guide

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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