Program Example For 8-Bit Serial Input - Fujitsu F2MC-8L F202RA Hardware Manual

;--------------------Interrupt processing routine----------------------------------------------------------
WARI
; -------------------------------------------------------------------------------------------------------------------
■

Program Example for 8-bit Serial Input

● Processing specifications
• The 8-bit serial input program inputs 8-bit serial data from the SI pin of the 8-bit serial I/O. When serial
I/O transfer terminates, an interrupt occurs.
• The program reads transfer data with the interrupt processing routine and inputs it continuously.
• The program uses the external shift clock to be input from the SCK pin.
● Coding example
DDR3
SMR
SDR
SSEL
SIOF
SST
ILR4
INT_V
IRQC
INT_V
;--------------------Main program---------------------------------------------------------------------------
CLRB SIOF
PUSHW A
XCHW A,T
PUSHW A
MOV SDR,#55H
SETB SST
:
User processing
:
POPW A
XCHW A,T
POPW A
RETI
ENDS
END
EQU 000DH
EQU 0039H
EQU 003AH
EQU 003BH
EQU SMR:7
EQU SMR:0
EQU 007EH
DSEG ABS
ORG 0FFE2H
DW WARI
ENDS
CSEG
:
MOV DDR3,#00000000B ; Sets the P30/SCK and P32/SI pins to input.
CLRI
CLRB SST
MOV ILR4,#11111101B ; Sets the interrupt level to 1.
CHAPTER 14 8-BIT SERIAL I/O
; Clears the interrupt request flag.
; Saves A and T.
; Resets transfer data (55
; Starts serial I/O transfer.
; Returns A and T.
; Address of data direction register 3
; Address of serial mode register
; Address of serial data register
; Address of serial/UART selection register
; Defines the interrupt request flag bit.
; Defines the serial I/O transfer start bit.
; Address of interrupt request setting register 4
; [DATA SEGMENT]
; Sets an interrupt vector.
; [CODE SEGMENT]
; The stack pointer (SP), etc., is already initialized.
; Disables interrupts.
; Stops serial I/O transfer.
).
H
337