Program Example For Timebase Timer - Fujitsu F2MC-8L Series Hardware Manual

5.7

Program Example for Timebase Timer

This section gives a program example for the timebase timer.
Program Example for Timebase Timer
Processing description
Generates repeated interval timer interrupts at 2
intervals.
At this time, the interval time is approximately 62.4 ms (at 4.2 MHz operation).
Coding example
TBTC EQU
TBOF EQU
ILR2 EQU
INT_V DSEG
ORG
IRQ6 DW
INT_V ENDS
;-----Main program---------------------------------------------------------------------------------------------------------------------------------------
CSEG
:
CLRI
MOV
MOV
SETI
:
;-----Interrupt program----------------------------------------------------------------------------------------------------------------------------------
WARI CLRB
PUSHW
0000AH ; Address of the timebase timer control register
TBTC:7 ; Define the interrupt request flag bit.
007DH ; Address of the interrupt level setting register
ABS ; [DATA SEGMENT]
0FFEEH
WARI ; Set interrupt vector.
; [CODE SEGMENT]
; Stack pointer (SP) etc. are already initialized.
; Disable interrupts.
ILR2,#11011111B ; Set interrupt level (level 1).
TBTC,#01000100B ; Clear interrupt request flag, enable interrupt request output,
; Enable interrupts.
TBOF ; Clear interrupt request flag.
A
5.7 Program Example for Timebase Timer
18
/F
18
select 2 /F and clear timebase timer .
CH
(F : main clock source oscillation)
CH CH
143