Post Created date
XMEGA, DMA and timers – how to keep in sync.
I’ve changed TCF0 period to 32 cycles, and the problem still exists. So definitely it is not connected with too fast access to RAM. Moreover, after the initialization procedure...
Monday, 11 February 2013 - 18:22
XMEGA, DMA and timers – how to keep in sync.
Thanks for replay. But I’m not talking about delay of port sampling. My problem is that event generated by timer is properly counted by another timer, but not always triggers...
Monday, 11 February 2013 - 15:29
XMEGA wish list
Better support for SDRAM. Now, EBI controller is extremely slow, and SDRAM access lasts 4-6 clock cycles, even within one page, support for SDRAM burst mode is needed.
Sunday, 10 February 2013 - 18:11
XMEGA, DMA and timers – how to keep in sync.
Yes, I’m sure. I’ve checked it using hardware debugger (Dragon), and the number of transferred bytes is lower than counted events by TCF1 even during transmission of first...
Saturday, 9 February 2013 - 07:25
XMEGA, DMA and timers – how to keep in sync.
Ok, I’ve changed it, but still number of transferred bytes is not equal to TCF1.CNT, so DMA is not triggered by some events.
Friday, 8 February 2013 - 17:26
XMEGA, DMA and timers – how to keep in sync.
To me it sounds like reasonable explanation. But I thought DMA in single shot mode should have a flag – do the transfer when bus will be available. So to me it makes no sense to...
Friday, 8 February 2013 - 15:14
XMEGA, DMA and timers – how to keep in sync.
I don’t think so. CNT cannot be equal to PER, when it is equal it will be cleared and overflow event will be signaled. But it doesn’t matter, still DMA loses the events and...
Friday, 8 February 2013 - 09:05
XMEGA wish list
1. Automatically save some registers (registers which are in gcc marked as modifiable by function) like in some cortex after evoking interrupt. In that case there is no need for...
Sunday, 6 January 2013 - 15:34
XMEGA wish list
maksim wrote:Fine remap of pins within port. So any combination of peripheials - UART, SPI, I2C, PWM etc - may by used simultaneously up to when all 8 pins are used. The...
Sunday, 6 January 2013 - 13:04
XMega cranks out NTSC color and digital stereo sound!
Nice project. Did you try it with computer monitor? I’ve found that modern LCD monitors are more demanding regarding video signal quality. BTW, what’s with your project to...
Thursday, 3 January 2013 - 08:21
Xplained-A3BU – schematics
Ok, I've found it: The link in pdf and in online documentation is broken.
Friday, 7 December 2012 - 18:16
Can you confirm linker bug? __attribute__ ((used))
Thanks to everybody.
Thursday, 29 November 2012 - 13:03