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Display floating point and integers on LCD

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CMOS

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displaying floating point in lcd

Can anyone please show me a sample C code to convert floating point and integer to BCD/ASCII? I want to display it on alphanumeric LCD.
For ex. I want to display "0.5" etc. on LCD which are in float data types.
 

floating point to lcd

No one has ever done this? :(
 

float point lcd

Thanks. I'll register and ask over there.

In the mean time if anyone over here knows how to do this, please help.
 

floating point representation in lcd

I found the solution over there. Here it is if any one is interested.

Code: 
char buffer[255]; 
double/float yourvar; 
sprintf(buffer, "%d" , yourvar);
 

Hi CMOS,

if you have sprintf available on you C compiler is good, but make attention of code space required by sprintf function. You can compare with (an example for one digit for integer part and one digit for fraction):

float a=0.5;
char str[4];
str[0]=(int)a+0x30;
str[1]='.';
str[2]=(int)(a%10)+0x30;
str[3]=0;


HH

NeuralC
 

This is more than easy, use the 8051 ANSI C Compiler from www.wickenhaeuser.de They have included drivers for own printf() formaters, with an example how to write an own 'lcd_printf()' Routine, that can even output floating point numbers.
There is a free 8kB code size limited demo... I tried it, nice product. The only problem (for them) is: the code is so dense, you have really to work hard until you get over the 8 kB :) :) :)

Nig.
 

Thanks for your suggestions guys. I've tried uC51. It has quite good library functions but it takes no time for the compiler to generate 8kb code for just a few lines of C code :(
 

:?: I think if you use the "%f" formater option, the code will get 1-2kB larger, because the full formater libs will be linked.

I am using a LCD on a 89S8252 with only integers "%d", "%u", for a RF-ID system (school project). Works fine :) and still half of the CPU (exactly 8k) is unused...

Maybe this could help you?: Use Fixedpoint formats:
You can use 'lcdprint("%d.%02u",val/100,(uint)(val%100))' to get a "pseudo" floating point output (with 2 digits).

Nig
 

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