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AVR Studio 4, stk600, jtagice mkii:Failed to set emulator...
I'm no expert. With that fair warning, my troubles stopped with two changes: 1) a new 32a4. 2) a better external power supply for both the stk600 and th jtagice mkii. I had been...
Sunday, 7 November 2010 - 00:36
Using triac as simple switch
Larry: "Can you help me pick out a motorcycle?" Curly: "Buy a car." Larry: "Thanks, but I'd really like to learn to ride a motorcycle. Can you help me with it?" Curly: "Buy a car...
Friday, 8 October 2010 - 21:49
Using triac as simple switch
steverino wrote: I wish to control multiple 24 VAC water valves. ... BTW2, why not just use relays? Learning something new and cost. "Multiple" = 16 At...
Friday, 8 October 2010 - 21:25
Architectural/design question: fast data logger
Great. Just great. Due primarily to the current and projected supply shortages of the xmega families in the required packages, atmel just got designed OUT of the product. No, it...
Friday, 3 September 2010 - 23:30
Architectural/design question: fast data logger
Kartman wrote:Why is FatFs blocking interrupts? It shouldn'd need to unless it is a fix for some re-entrancy situation. Great question. It is no longer blocking interrupts. I...
Thursday, 2 September 2010 - 21:17
Architectural/design question: fast data logger
I apologize for sucking you all in with such a question and then disappearing. I had to go provide some help to my out of town parents. I'll provide some feedback to your...
Thursday, 2 September 2010 - 21:12
Architectural/design question: fast data logger
bobgardner wrote:...send it over at max baud divisor... 1 mbps. Have you tried running avr uarts at this rate and had good success? I'll try it out, for sure, but I find myself...
Saturday, 21 August 2010 - 05:31
Architectural/design question: fast data logger
The 320K bps I quoted is based on the data requirements: 20 bytes of worth of sensor data sampled at a rate of 2K Hz. FatFs blocks interrupts regularly during writes. On the SD...
Saturday, 21 August 2010 - 05:27
Architectural/design question: fast data logger
clawson wrote:You don't have to seek but if you don't then you are going to create a very big file - maybe that doesn't matter? I'm curious. Why is that? At first I wondered...
Friday, 20 August 2010 - 17:18
Architectural/design question: fast data logger
clawson wrote:You don't have to seek but if you don't then you are going to create a very big file - maybe that doesn't matter? Yes, that's not a problem. clawson wrote:As for the...
Friday, 20 August 2010 - 16:56
Architectural/design question: fast data logger
clawson wrote: you could just open a file, and keep fseek'ing and rewriting the same test data to get an idea of the bandwidth that can be achieved. Cliff My current SD access...
Friday, 20 August 2010 - 15:12
Architectural/design question: fast data logger
Each xmega is running off its internal clock. I will try your file write suggestion with various buffer sizes. Thanks.
Friday, 20 August 2010 - 15:08

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