08-16-2017, 10:09 PM
sir i want to have the code for 89s52 microcontroller to control speed of dc motor with using L293d motor driver i have a code shown below but it is not converting to the hex file in keil detecting error sir please this is humble request to make a favour and make a code speed controlling the speed of small dc motor with 90% 50% and 10% power please sir help me out this my last project in the last year for engineering please help me out the code is shown below..
org 0x00
jnb p1.4,main
main:
mov r7,#160
call pwm_init
org 0x0b
jb f0,low_cycle
jnb p1.3,low_cycle1
high_cycle:
setb f0
setb p1.1
mov th0,r7
clr tf0
reti
low_cycle:
clr f0
clr p1.1
mov a, #00H
clr c
subb a, r7
mov TH0, a
clr TF0
reti
low_cycle1:
clr f0
clr p1.1
mov a, #0FFH
clr c
subb a, r7
mov TH0, A
clr TF0
reti
pwm_init:
mov tmod,#00H
inc r7
setb EA
setb ET0
setb TR0
jmp pwm_init
end