shiva prasad ellendula

regarding PID control

Discussion created by shiva prasad ellendula on Feb 1, 2010
Latest reply on Feb 2, 2010 by shiva prasad ellendula
hello everyone...
i'm working on project, in which i'm using MC9S08QD2 8-bit 8 pin microcontroller.
know i have to implement PID controller for output current of boost converter.
so, please anyone help me how to implement PID using this microcontroller.
so, after searching , i got the paper i.e, AN1215. in that microcontroller it is a 40 orsomething pin and in that registers are defined to store exponennt , mantissa everything....
so in MC9S08QD2 there is nothing like that...
so please anyone suggests me ,
1. how to convert the Digital value of ADC to analog value in the c code
2. how to convert the floating value to the hexadecimal
3. what we have to do , to make recognise the controller that, this is the floating value
4. and finally after the floating point arithmetic , how can we assign the floating value of result to the register.

i require answers for this immediately...
as i have to complete this project soon...
please help me out from this....

thanking you
Shiva prasad E