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xmega SPI DMA
The SPI interface requires that you transmit in order to receive. IE: you stuff a byte of *DON'T_CARE* into the transmitter and on the next transmit buffer empty you read the...
Friday, 17 August 2012 - 13:40
In line assembler EIJUMP ???? (xmega256a3u)
I've managed to build a jump table inside my bootstrap. The bootstrap stores the lower 16 bits of the address for this table in GPIOR0 (lsb) and GPIOR1(msb). The address is...
Thursday, 16 August 2012 - 20:21
How to set linker options for boot loader build?
I want to migrate xboot from a makefile project to a S6 project. I've created a new project, removed the files the wizard created and added the files from my existing project. I...
Thursday, 16 August 2012 - 15:27
Storing data in flash from program?
On the xmega is it possible to use part of the flash memory normally used for program space as non-volatile storage for user data? I know that the xmegas can devote the bottom of...
Wednesday, 15 August 2012 - 14:13
Atmel 'pushing' xmegas?
Very recently I've noticed a price increase on many members of the atmega family (1284p,644p,324p) while equivalent xmega devices (in io pin count, and memory) are priced nearly...
Wednesday, 15 August 2012 - 12:46
Migrating project from S4 to S6?
I'm getting the following error in my S4 project when I click on the 'clean' button under build. This started happening after installing S6 (using S6 on an other project with a...
Monday, 13 August 2012 - 15:54
Compilier in Studio 6 generates endless loop?
I'm building an app using an xmega256a3u processor and I'm using Atmel's studio 6 with their tool set. One function seems to be in an endless loop, and sure enough, according to...
Wednesday, 8 August 2012 - 20:48
atxmega256a3u watchdog not firing.....
I'm trying to set the watchdog to reset the processor (I want to have TWO DIFFERENT ways to reset the processor so my bootloader can decide to ignore one of them, so I use BOTH...
Tuesday, 7 August 2012 - 15:11
Editing Studio 6 projects?
With Studio 4 I could create a new project based on an existing one by hand editing the .APS file. Studio 6 uses .atsln files but seems to store changes in a .atsuo file. If I...
Tuesday, 7 August 2012 - 13:42
Xmega A3U ADC clock rate
The documentation says the ADC has a max rate of 2mhz. I'm not sure if they mean the ADC Clock rate, or the conversion rate (and is the conversion rate in BITS, BYTES, or 12 bit...
Tuesday, 31 July 2012 - 14:29
problem with ADC on 3.3v atmega328
I'm working on a project designed around an Arduino, which is to say it's using an atmega328 processor, Arduino bootloader, and software written using the Arduino IDE. When...
Sunday, 29 July 2012 - 18:26
atmega1281 usart in SPI master mode, 9 bit?
I have an LCD display that uses a 9 bit SPI interface (8 bits of data and one bit to control data/control register access). It can be used with the atmega SPI interface by bit...
Monday, 23 July 2012 - 21:34

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