AVR-Chat

HA..  Got it.  You got me looking in the right direction with the itoa. 
Found example code at http://en.wikipedia.org/wiki/Itoa and now its working 
as desired without the added bloat.

Again I owe ya.  Thanks guys

----- Original Message ----- 
From: "Don Kinzer" <dkinzer@easystreet.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Wednesday, January 23, 2008 8:19 PM
Subject: [AVR-Chat] Re: Simple casting winavr


--- In AVR-Chat@yahoogroups.com, "Bryan Martin" <registration@...>
wrote:
> I need to print the decimal value to UART so I want to see 10.
This issue has nothing to do with casting, by the way.  That aside,
the C run-time library has a function to convert a value to a string
and the one that you mentioned is close but not the right one.  You
need sprintf() or, alternately, itoa().

uint8_t byte_in;
uint8_t buf[5];
sprintf(buf, "%u", byte_in);

That will get you a null-terminated sequence of digits in the buffer.
Note that I used the %u format specifier which is for unsigned decimal
conversion.  The %d that you used if for signed decimal conversion.

Next, you need to output those characters via the UART.  For this, you
need a different function, one that is not part of the C run-time
library.  The reason that this is so is because there is no "standard"
way to implement a UART interface.  You might be using an interrupt-
driven output routine with a fancy queue arrangement while I might be
using a simple polled output techinique.

You can find examples of both interrupt-driven and polled I/O drivers
for AVR UARTs in many places.  If you search for "procyon" or "stang"
and "UART" you'll find but one example written by Pascal Stang.

You'll find that C has significantly more power and flexibility than
Bascom but the price that you pay is a steeper learning curve and
having to search to find code you can use or write your own for many
things that Bascom provides for you.

Don Kinzer
ZBasic Microcontrollers
http://www.zbasic.net





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8:12 PM