How to use timer2 of 8051 ?

[ucsam]

hey! guys

i wanted to use the timer 2 of 8051 to use it as the multiplexing delay for seven segment led display. So guys if anyone of u know how can i use timer 2 of 8051 please give the pseudocode or C code or assembly code will work too.

thanks

 

[Arch Zone]

Re: using timer2 of 8051

using timer 2 without interrupt :

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Code ASM - [expand]
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VH      Equ 04Ch
VL      Equ 000h
;XTAL = 11059200
;10000h - 4C00h = B400h = 46080 cycles => 46080/(11059200/12) = 50 ms
Begin:
    Clr Tr2
    Mov Th2,#VH
    Mov Tl2,#VL
    Mov Rcap2h,#VH
    Mov Rcap2l,#VL
    Clr Tf2
    Setb Tr2
 
Main:
    Jnb Tf2,$
    Clr Tf2
    Acall Refresh_Display
    Sjmp Main

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using timer 2 with interrupt :

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Code ASM - [expand]
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VH      Equ 04Ch
VL      Equ 000h
;XTAL = 11059200
;10000h - 4C00h = B400h = 46080 cycles => 46080/(11059200/12) = 50 ms
Begin:
    Ajmp Init
    Org 02Bh
    Clr Tf2
    Acall Refresh_Display
    Reti
 
Init:
    Clr Tr2
    Mov Th2,#VH
    Mov Tl2,#VL
    Mov Rcap2h,#VH
    Mov Rcap2l,#VL
    Clr Tf2
    Mov Ie,#A0h
    Setb Tr2
 
Main:
    Sjmp $

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[MahmoudJaser]

Re: using timer2 of 8051

can any one add a mikrobasic code for timer two that-lets say- drive LED when over flow occur (for PIC 16f877a)