AN413 datasheet(27/45 Pages) STMICROELECTRONICS

27 / 45 page

AN413

Examples of ST9 peripheral configurations

Doc ID 1875 Rev 2

27/45

.org EXT_IT_VECT

; External interrupt vector

; *************************

WDT_IT:

.word TEMPO ; Watchdog Timer interrupt vector

.org ADC_IT_VECT ; ADC interrupt vector

; ********************

.word RESET_START ; Analog Watchdog interrupt vector

.word ADC_EOC ; End of conv. interrupt vector

.org SCI_IT

; SCI interrupt vector

; ********************

.org SCI_IT + 4

; unused addresses

.word REC_DATA

; receiver interrupt

.word TRA_HOLD

; Transmitter interrupt

;**********************

;*Start of main module*

;**********************

.org 100h

; start of code

RESET_START:

ld MODER,#11100000b ; CLOCK MODE REGISTER

; internal stack

; no prescaling

; external clock divided by 2

ld CICR,#10000111b ; CENTRAL INTERRUPT

; CONTROL REGISTER

; priority level = 7

; concurrent mode

; disable interrupt

clr FLAGR

spp #WDT_PG

ld WCR,#wden

; watch dog mode disabled,

; no wait states.

ld EIMR,#0

; mask all channel interrupts.

; at reset,Global Counter Enable

; bit is active.

ld SSPLR,#SSTACK + 1 ; load system stack pointer

ld USPLR,#USTACK + 1 ; load user stack pointer

call INIT_IO

; init I/O ports

MAIN:

jxt MAIN

; include your Main program here !

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