Floating point - showing the temp in lcd

[gafar]

Floating point

I need show the temp in the Display lcd.
Range temperature = 0 ~ 128 °C
Range AD = 00h ~ FFh
1 step 0,5°C = 128/256
35°C = 46h * 0.5
How i do it use assembly to 8051???
Can you help me
Thanks

 

[ZeleC]

i havent worked wth 8051
but an idea is to make H46 * 5 get the answer and display the decimal point urself on the second digit . Of course u have to do a hex to decimal routine before displaying .
regards

 

[gafar]

:idea: Thanks for open my mind.

 

[volta]

Re: Floating point

its quite simple actually using the mul and div instructions

 

[sheikhu]

Re: Floating point

u can use normalization to implement FPU .. no need to actually implement FPU
represent the non-decimal part by say 7 bits ... and then assign another say 3-4 bits for the decimal portion....

 

[J_expoler2]

Re: Floating point

hi
u can use Look Up Table or Hex to Decimal algorithm to convert data
:idea:

 

[Lucas]

Re: Floating point

At http: //xavier.fenard.free.fr/LCMeter.htm
you have an exemple of float routine for a small
avr. Change only the appl. prog....
lucas