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+--- Thread: Hoce li ovo da radi ? (/showthread.php?tid=1907)
Hoce li ovo da radi ? - MILANNN - 05-19-2018
Pozdrav svima.Ovo sam skinuo sa interneta,potreban mi je kod za frekvencmetar da mogu kasnije da ga prilagodim nekim potrebama ali nemogu da ga probam nikako u proteusu jer mi odmah procesor zakucava na 100% a ovako od oka gledano neznam da li bi radilo pa nebi imalo smisla kupiti komponente i praviti naslepo.Ako neko moze neka kaze misljenje paraviti ili ne.
' Code for 16F877A to count frequency
' Uses TMR0 and prescaler to gate 1 second counting time, internally clocked.
' Uses Timer1, external clock, from PIN 15
' WDT, Analog, Comparitors OFF
clear
define loader_used 1
define osc 4
' Define LCD registers and bits
Define LCD_DREG PORTD
Define LCD_RSREG PORTE
Define LCD_RSBIT 0
Define LCD_EREG PORTE
Define LCD_EBIT 1
define LCD_RWREG PORTE
define LCD_RWBIT 2
define LCD_BITS 8
define LCD_LINES 2
define LCD_COMMANDUS 2500
define LCD_DATAUS 100
TRISC = %11110001 'using pin 15 as input for frequency
'TRISD = 0 'PORTD all outputs >> >>>>>>>>>>>>>>>>> ovde sam zamenio port D i port B
'PORTD = 0 jermi nije imalo logike zbog displeja
CMCON = 7 'disable comparators
ADCON1 = 7 'PORTA and E digital
TRISB = 0
portb = 0
'setup option register for TMR0
option_reg.7 = 0
option_reg.6 = 1 '1 for interrupts active
option_reg.5 = 0
option_reg.4 = 1 '1 for interrupts active
option_reg.3 = 0 'Assign prescaller to TMR0
option_reg.2 = 1 'prescaler 0-15
option_reg.1 = 1 'with this setting TMRO-Rate = 1:256
option_reg.0 = 1
'Prescaller settings for option_reg
'option_reg 01011000 = 1:1 prescaler TMR0 roles over every 1mSec
'option_reg 01010000 = 1:2 prescaler TMR0 roles over every 152 uSec
'option_reg 01010001 = 1:4 prescaler TMR0 roles over every 1mSec
'option_reg 01010010 = 1:8 prescaler TMR0 roles over every 2mSec
'option_reg 01010011 = 1:16 prescaler TMR0 roles over every 4mSec
'option_reg 01010100 = 1:32 prescaler TMR0 roles over every 8mSec
'option_reg 01010101 = 1:64 prescaler TMR0 roles over every 16mSec
'option_reg 01010110 = 1:128 prescaler TMR0 roles over every 32mSec
'option_reg 01010111 = 1:256 prescaler TMR0 roles over ever 64mSec
INTCON.7 = 0 'disable interrupt routine on overflow
INTCON.5 = 0 'disable interrupt routine on Timer0 overflow
INTCON.4 = 0 'disable RB0 external interrupt function
INTCON.3 = 0 'disable port change interrupt function
INTCON.1 = 0 'not really needed, but clear possible pin change flag
T1CON = %00110010 'Timer1 prescaler = 8 - osc off- sync on, external source
lcdout $fe,1 'clear the display
lcdout "Frequency Counter"
pause 300
Tmr1flg var word
counting var byte
calc var byte
mhz var byte
khz var word
hz var word
PORTB = 0 'We will be setting PORTD.0 high through the 1 second
'gate-period to monitor it with Oscope
INTCON.2 = 0 'Clear Timer0 interrupt flag
T1CON=0 'Reset Timer0 counting value
mainloop:
Tmr1flg = 0 'Clear variable which counts Timer1 overflows
TMR1H = 0 'clear Timer1 high register
TMR1L = 0 'clear Timer1 low register
PIR1.0 = 0 'clear Timer1 overflow flag bit
INTCON.2 = 0 'Clear Timer0 interrupt flag
T1CON = 0 'Reset Timer0 value
counting = 0
PORTB.0 = 1 'raise the 1 second timer flag
T1CON.0 = 1 'start Timer1
while counting < 15 'Timer0 has to overflow this many times for 1 second gate period
while INTCON.2 = 0 'watch for Timer1 overflow and count if it occurs.
if PIR1.0 = 1 then 'if Timer1 overflow flag is up then
Tmr1flg = Tmr1flg + 1 'increment overflow count by 1. Each count represents value of 524280
PIR1.0 = 0 'Now reset the Timer1 overflow flag bit
endif
wend 'end of inner while loop
INTCON.2 = 0 'Now reset the Timer0 overflow flag bit
counting = counting + 1 'increment counting for gate time
wend 'end of outer while loop
T1CON.0 = 0 'stop Timer1
PORTB.0 = 0 'lower the 1 second timer flag representing the gate period
' calculations to get the numbers captured to the display
' we have to feed the number of Timer1 overflows into Mhz, Khz, hz
' Then we feed the Timer1 remaining count * 8 in as well
' and parse it out to mhz khz hz
hz = 0
khz = 0
mhz = 0
' Add Timer1 overflow values into Mhz, Khz, hz
if Tmr1flg > 0 then
for calc = 0 to Tmr1flg
khz = khz + 524
hz = hz + 280
while hz > 999
khz = khz + 1
hz = hz -1000
wend
while khz > 999
mhz = mhz + 1
khz = khz - 1000
wend
next
endif
' Add remaining Timer1 count * 8 into Mhz, Khz, hz
for calc = 0 to 7
hz = hz + T1CON
while hz > 999
khz = khz + 1
hz = hz -1000
wend
while khz > 999
mhz = mhz + 1
khz = khz - 1000
wend
next
'Display results
if mhz > 0 then
lcdout $FE,1,#mhz,".",#khz,".",#hz
else
lcdout $FE,1,#khz,".",#hz
endif
pause 2000
goto mainloop ' Go get another reading
End