micro controller for finding ratio

[Baalu]

Hi

I wanted to find the ratio of a set of no:s using a microcontroller.
eg 30.5/16.8 = 1.8
Data is received by an SPI and transmitted through an USART.

Can anyone suggest a suitable microcontroller, preferable with lesser no; of cycles per division

 

[horace1]

have a look at this thread
https://www.edaboard.com/threads/216127/

 

[Baalu]

Thanks for the reply.

I am planning to use PIC/dsPIC for my application.

But I haven't worked in microcontrollers before. From the datasheets of a few PICs I have seen they are capable of giving only an integer result.So if I need, for eg: 30/4..can i get the result as result= 7.5 rather than Quotient = 7 and reminder = 2? Can dsPIC30x or PIC24x give the required result as a floating point number?

 

[horace1]

most microcontroller compilers and libraries have float variables with, if the device does not have floating point hardware, the float calculations done in software. This is the case with the PIC24 and dsPIC. also you can print float and double results using printf() etc

  float x = 30/4.0f;
  printf("%f\n", x);

would give a float result 7.5

if you are looking for a more sophisticated (and expensive) development board the Microchip Explorer 16 is good
**broken link removed**

if can take PIC24, dsPIC and PIC32 PIMs and a range of daughter boards can be plugged in
**broken link removed**

 

[Baalu]

Is there a corresponding code in assembly language. How is it stored in the memory?

 

[horace1]

with floating point hardware there are machine instructions.
don't know about PIC24 and dsPIC where floating point would be emulated - I have not used assembly langauge for years
for floating point representation have a look at
IEEE 754-2008 - Wikipedia, the free encyclopedia