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Noob int question
TCC1.CCA = (x * y) / 100; In the operation above, x and y are unsigned ints. While in my application the result will always fit into an unsigned int, there are cases where (x...
Tuesday, 1 May 2012 - 05:29
Port configuration problem with 32A4
I'm trying to configure pins 5-7 on port C as totem-poles with pullup resistors. They're pulled low one at a time by a 1P3T switch. It seems to me that, until pulled low, each...
Tuesday, 24 April 2012 - 01:36
Seeking emulator advice
My JTAGICE mkII was behaving flakey due, I think, to the ribbon cable connection to the target connector (the emulator seemed to stabilize if I wiggled this end of the ribbon...
Tuesday, 27 March 2012 - 02:14
Event system/timer problem
I'm using a 32A4 running at 32MHz on the internal oscillator. I'm interfacing to a Parallax Ping ultrasonic sensor (on PORTC.0) which is triggered outside the code below. The...
Saturday, 25 February 2012 - 23:15
Question about reading an input port
So I'm testing out the I/O on a new Xmega32A4 board of mine. I've hooked up a normally high sensor to C.0 and a scope probe, and another scope probe on D.0. The idea is when...
Saturday, 5 November 2011 - 21:32
Anybody know what the big Atmel Xmega announcement is?
It was supposed to be today, based on this post: https://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=107160&postdays=0&postorder=asc&start=30
Monday, 24 October 2011 - 20:32
Clock configuration trouble - Xmega32A4
Trying to bring up an Xmega32A4 board of my own design. Got PORT D to flash, but the clock configuration code I added next disappoints. Based on the forum posts on this topic I...
Sunday, 25 September 2011 - 21:14
Counter variable doesn't increment
I'm evaluating an Xmega Xplained board whose code examples are in AVRGCC. They work fine, but I'm more familiar with ICCAVR, so I'm trying to get them to work with that compiler...
Thursday, 1 September 2011 - 04:56
128A1 Xplained and ICCAVR
While I'm waiting for this board to arrive I've downloaded some of the eval s/w and noticed that it's written for GCC-AVR or IAR. I use ICCAVR and, not surprisingly I guess, can'...
Friday, 29 July 2011 - 23:08
Newbie question about WinAVR
I've always used ICCAVR but I'm going to be evaluating XMEGA via the XMEGA Xplained board, and its code examples are all in IAR/GCC-AVR, so I'm familiarizing myself with WinAVR,...
Friday, 29 July 2011 - 04:02
3.3V regulator designs
I'm thinking about using a 64A4 in a new design and have been evaluating 3.3V linear regulators since I'd prefer to run off a single 5V supply for the rest of the system. All the...
Wednesday, 6 July 2011 - 17:30
Xmega power consumption
The datasheet for the ATxmega64A4 family specifies a max. current per I/O pin of 20 mA, and a max. current for VCC and GND pins of 200 mA. I take this to mean the max. current...
Thursday, 9 June 2011 - 17:13