Post Created date
ATtiny at 16MHz
For cycle accurate operations, you need to use assembly or a interrupt timer with a long enough period in C. One line of C can compile to many lines of assembly and not every...
Thursday, 18 April 2013 - 07:20
Petit FS problems
I used this site initially to get me started on FatFs I think fatfs variants are the easiest way to write to SD, otherwise you have to keep...
Thursday, 18 April 2013 - 07:05
Real-time counter stale values
Can't be that long. 4096 is 1second on that counter. Datasheet for the atxmega64a3u states 12ms for EEPROM page erase&write. I am doing writing 7 bytes so worst case is 86ms.
Tuesday, 16 April 2013 - 10:08
FatFs --disk_timerproc()?
If you are not using it that much, I would suggest you change the timeouts to be polling based (add a hardcoded for loop) rather than interrupt based. That way you can free up 2...
Monday, 15 April 2013 - 01:57
High voltage programming
The STK600 can do high-voltage (parallel programming). A scenario I encountered where I had to use high voltage programming is when I accidentally disabled the SPIEN fuse in...
Tuesday, 9 April 2013 - 07:29
USB driver and Windows 8
After trying for a couple of days on multiple computers, the signed driver finally worked. Atmel technical support gave me the same files as in asf 3.7.3. This time I just put the...
Tuesday, 9 April 2013 - 07:19
USB CDC interrupt or?
You can use the udi_cdc_is_rx_ready() function in a loop with a number of retries to determine if there is data to be gotten. You can read the asf manual on cdc for more details.
Tuesday, 9 April 2013 - 01:50
Noise on an external 24bit ADC
jmaja1 wrote: So it appears I need to add something to +12 V cable. Why did 4) help, but 5) didn't help more? Was it just the added resistance? Shouldn't the rolled cable have...
Monday, 8 April 2013 - 00:17
USB driver and Windows 8
I guess it looks for the for the digital signature. However, it's in the same directory as the .inf file, so it should find it right? However, windows7 still...
Saturday, 6 April 2013 - 06:47
USB driver and Windows 8
I downloaded asf 3.7.3 standalone and found the cdc driver. However, when I pointed to it in windows7 it still said that it was not signed? is there something I'm missing? How...
Saturday, 6 April 2013 - 03:41
Noise on an external 24bit ADC
You might try separating the power supplies for the GPS and rest of your circuits. 1) Use 12V->3.3V and 12V->5V LDOs instead of 12V->5V->3.3V. This should minimize GPS noise on 5V...
Saturday, 6 April 2013 - 03:36