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PWM GENERATION WITH THE ST62 16-BIT AUTO-RELOAD TIMER

3 PROGRAM EXAMPLE

.vers "st6230"

.romsize 8

;*** data registers ***

.input "623x.asm"

;*** data RAM ***

Msb_inc1.def

084h

; Msb of the increment tone 1

Lsb_inc1.def

085h

; Lsb of the increment tone 1

Msb_inc2.def

086h

; Msb of the increment tone 2

Lsb_inc2.def

087h

; Lsb of the increment tone 2

Msb_ton1.def

088h

; Msb of the tone 1

Lsb_ton1.def

089h

; Lsb of the tone 1

Msb_ton2.def

08Ah

; Msb of the tone 2

Lsb_ton2.def

08Bh

; Lsb of the tone 2

WaitTone.def

08Ch

; even -> tone, odd -> break

NToSend.def

08Dh

; Number to dial from the telephone number

Tel_Num.def

08Eh

; Telephone number to dial

;*** Definition ***

OVFFLG .def 2

; Overflow flag bit position

tmz

.equ 7

; This bit must be cleared by user software

; before starting a new count.

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

.org 800h

;*** sinus() ***

sinus:

.byte

040h,046h,04ch,052h,058h,05eh,063h,068h

.byte

06dh,071h,074h,078h,07ah,07ch,07eh,07fh

.byte

07fh,07fh,07eh,07ch,07ah,078h,074h,071h

.byte

06dh,068h,063h,05eh,058h,052h,04ch,046h

.byte

040h,03ah,034h,02eh,028h,022h,01dh,018h

.byte

013h,0fh,0ch,08h,06h,04h,02h,01h

.byte

01h,01h,02h,04h,06h,08h,0ch,0fh

.byte

013h,018h,01dh,022h,028h,02eh,034h,03ah

num_dial:

;*** f(16 bits)=F(Hz)/5319*64*256 ***

;

FREQ1

FREQ2

;

Msb1 Lsb1 Msb2 Lsb2

.byte

0bh, 53h, 10h, 13h;number 0

.byte

08h, 63h, 0eh, 8ch;number 1

.byte

08h, 63h, 10h, 13h;number 2

.byte

08h, 63h, 11h,0c6H;number 3

.byte

09h, 44h, 0eh, 8ch;number 4

.byte

09h, 44h, 10h, 13h;number 5

.byte

09h, 44h, 11h,0c6h;number 6