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GPIO on both falling and rising; How to distinguish
It sounds like the question here is more on how to tell, within the interrupt handler, what changes in condition were observed for the pin. If the interrupt handler doesn't...
Wednesday, 4 April 2012 - 16:56
TWI interface
Do you have the appropriate pull-up resistors? Did you verify that the device you're communicating with supports the TWI clock rate you're requesting? With that being said... When...
Monday, 2 April 2012 - 19:07
xmega/drivers/twi: read command doesn't output data
Glad to hear you were able to get it working!
Thursday, 22 March 2012 - 17:38
Xmega128B1 Xplained ---> Hyperterminal
I'm not sure about the "Xmega128B1 Xplained" board you mentioned, but with the Xmega128A1 Xplained, it's really just as simple as sending data out to port USARTC0. The other...
Thursday, 22 March 2012 - 17:30
XMEGA A1, port D and output pins
To supplement what GTKNarwhal said, the specific Atmel note/guide you're looking for is AVR1924. Direct link to the schematic PDF:
Monday, 19 March 2012 - 20:30
Transcribe my programm for ATxmega128A1def ?
I feel like we're being asked to do some serious engineering and not getting paid for it...
Monday, 19 March 2012 - 20:24
xmega/drivers/twi: read command doesn't output data
The application code making use of the TWIM framework code is responsible for populating all fields of the "package". For example, if you're expecting to read 2 bytes from the...
Monday, 19 March 2012 - 20:21
xmega/drivers/twi: read command doesn't output data
The way I read Atmel's code here, the code is supposed to busy-wait in twim_release() until the operation completes. There's an interrupt that triggers twim_read_handler() to be...
Friday, 16 March 2012 - 17:42
avrdude / stk600 / atxmega256a3u
Are you using the correct USB driver for your STK600, i.e. the "libusb" one that AVRDude plays nicely with? My experience has been that if the STK600 enumerates with the Atmel...
Friday, 16 March 2012 - 17:10
Periodically waking xmega from sleep?
Per the XMEGA manual, the only difference between "Power-down Mode" and "Power-save Mode" is that the RTC can be running in "Power-save Mode". In the datasheet I have, the typical...
Friday, 16 March 2012 - 17:03
Periodically waking xmega from sleep?
Assuming the XMEGA is sleeping in a light enough state that the peripherals are still running, you can do this with any timer/counter interrupt. This is the lightest sleep state...
Thursday, 8 March 2012 - 14:21
Xplained Light Sensor reading via ADC
In case this was still in question, the light sensor on the XMEGA A1 Xplained has the following characteristics: Input Port: Port B (ADCB) Input Pin: Pin 1 (ADCCH_POS_PIN1)...
Tuesday, 6 March 2012 - 17:15