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Bug in XMEGA App 1307 C code file, usart_example_interrupt.c
/* Use USARTC0 and initialize buffers. */ USART_InterruptDriver_Initialize(&USART_data, &USART, USART_DREINTLVL_LO_gc); &USART should be &USARTC0. Likewise for...
Thursday, 22 October 2009 - 17:55
Trying to understand XMEGA defines
I see a lot of *_gc and *_bm, for instance PORTC.DIRSET = PIN3_bm; or USART_RxdInterruptLevel_Set(USART_data.usart, USART_RXCINTLVL_LO_gc); Perhaps I'm being thick, but I...
Thursday, 22 October 2009 - 17:44
Using multiple pins for single current source
I have a GPS that sinks too much current for any one pin, but not for the uC as a whole. Can I tie together multiple pins for a current source? If one pin starts supplying too...
Friday, 10 April 2009 - 15:49
Trying to choose STK600 adapter board for XMEGA series
I sent the following question to Atmel tech support, but got no response. (Very frustrating. Do they ever respond to *anyone* here???) Can someone answer the question? Quote:I was...
Wednesday, 25 February 2009 - 13:17
Question about 3.3V uart cable length and noise
I've got a car application that, among other things, logs a GPS NMEA data string sent over UART at 19200. It works just fine in the lab. Great. Now I installed in a car, and the...
Tuesday, 24 February 2009 - 22:31
Reading SQL database
This might be way too much for a little 8-bit uC, but I would love to use one to perform look ups in some flavor of SQL database. If one doesn't care about access time and...
Friday, 13 February 2009 - 00:37
Designing efficient DC-DC converter
Just for my own personal edification. I'm curious. I know that if you design a SMPS circuit to handle large large that it's very inefficient at low loads. Thus, bench supplies...
Monday, 26 January 2009 - 10:20
[TUT] [C] Bootloader using SD/MMC card
(This tutorial is based on modified code from http://www.mikrocontroller.net/a...ür_AT_Mega. In addition, it uses modified sd/mmc reader code from E.Chan.) Introduction...
Wednesday, 10 December 2008 - 14:21
Not linking unused files in the source tree
I've got some files in the source tree that are only used for debugging purposes. When debugging is turned off, the source files are not used. They are, however, compiled and...
Thursday, 4 December 2008 - 16:54
Hex size differences between WinAVR Makfile and AVRStudio
I'm writing a bootloader and need to test file size. I have two *completely* different programs, one with a Makefile and one as an AVRStudio project. In both, I create a ....
Wednesday, 3 December 2008 - 18:06
Watchdog crashes bootloader
UPDATE: Symptoms fixed. It was an uncleared WDRF in MCRUSR that was causing a continual watchdog reset every few ms. ============================= (This is in pure C, with an...
Tuesday, 25 November 2008 - 16:16
How well does an optocoupler protect against noise?
I'm not sure if I'm asking this question correctly, but it's all I've got to go on right now. Basically, I've got a setup where I'm using an AVR to log fuel injection pulses. When...
Friday, 7 November 2008 - 09:52

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