Sample Programs For The Multi-Functional Timer - Fujitsu MB90460 Series Hardware Manual

14.8

Sample Programs for the Multi-functional Timer

This section contains sample programs for the multi-functional timer.
■ Sample Program for 16-bit Free-run Timer
●
Processing
• A 4 ms compare clear interrupt is generated with 16-bit free-run timer 0.
• The timer is used in up-down mode to repeatedly generate a compare clear interrupt.
2
• EI OS is not used.
• 16 MHz is used for the machine clock, and 62.5 ns is used for the count clock.
●
Coding example
ICR11
TCCS
CPCLRB
ICLR
;-------Main program------------------------------------------------------------------------------------------------
CODE
START:
;
LOOP:
;-------Interrupt program--------------------------------------------------------------------------------------------
EQU 0000BBH
EQU 00005EH
EQU 000058H
EQU TCCS:9
CSEG
:
AND CCR,#0BFH
MOV I:ICR11,#00H
MOVW I:CPCLRB,#0FFFFH ;Set compare clear value to change
MOVW I:TCCS,#0110H
MOV ILM,#07H
OR CCR,#40H
MOV A,#00H
MOV A,#01H
BRA LOOP
CHAPTER 14 MULTI-FUNCTIONAL TIMER
;Interrupt control register for the
16-bit free-run timer
;Timer control status register
;Compare clear buffer register
;Interrupt request flag bit
;Assumes that stack pointer (SP) has already been
initialized
;Interrupt disable
;Interrupt level 0 (strongest)
16-bit free-run timer from up-count to
down-count
;Sets up-down mode, 62.5 ns count clock
;Enables compare clear interrupt
;Disables interrupt mask
;Clears interrupt flag and enable timer
;Sets ILM in PS to level 7
; Interrupt enable
;Endless loop
;
;
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