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I need to read simple files off a USB drive with minimum hardware. What approach should I use?
OK, that SD card interface looks very promising.  Many thanks!
Wednesday, 1 April 2020 - 01:49
I need to read simple files off a USB drive with minimum hardware. What approach should I use?
Yeah, this may be the wrong approach (but USB drives are so convenient!).  Maybe special hardware is a better choice.  Then it needs other special hardware to program it...
Wednesday, 1 April 2020 - 00:26
Can I program the same hex file to multiple devices in the same family?
It should work until it doesn't.  How much time do you want to spend checking data sheets for any possible mismatch?  How much time do you want to spend debugging when...
Saturday, 8 February 2020 - 01:24
How to select micro controller architecture
clawson wrote: I would generally measure a CPU's width based on the width of the CPU registers/ALU not the opcode width. This is how I've always understood it.  Another...
Monday, 3 February 2020 - 22:30
How to select micro controller architecture
Depends on project requirements, developer familiarity and access to tools, and budget matters.  Second sourcing used to be important, but not any more.  If you're going...
Sunday, 2 February 2020 - 18:06
Problem with SW based timer due to execution time ok fixed tasks
bbogdanmircea wrote: Hello kk6gm and thanks for your answer. I suppose your suggestion is same as I showed my code with the flags for the different 10ms tasks that are also based...
Monday, 16 September 2019 - 17:41
Problem with SW based timer due to execution time ok fixed tasks
Lots of invisible code here, but I'd say your problem is as you suspect, reading the counter after any task has executed and still expecting % 10 == 0 to be true.  Not...
Saturday, 14 September 2019 - 14:34
Help With a simple Assembly program that uses external interrupts
esavrperson wrote:At this point I think I should use capacitor to accomplish my objective I think that would be a mistake.  99+% of debouncing is done in software, not in...
Saturday, 7 September 2019 - 00:21
Help With a simple Assembly program that uses external interrupts
The delay is about 200 * 256 * 3 (clock cycles per inner loop) * clock cycle time, or very roughly, 10 ms for the numbers you've used.  It's possible that the interrupt...
Friday, 6 September 2019 - 20:14
Help With a simple Assembly program that uses external interrupts
Quote: L1:       LDI R24,200             LDI R25,0             SUB R24,R25  ...
Friday, 6 September 2019 - 19:39
Help With a simple Assembly program that uses external interrupts
esavrperson wrote: Thank you very much for the help kind sir. Is that bne or brne? And where should I insert this L1 coding block in the ISR? That's why I said it was pseudo-code...
Friday, 6 September 2019 - 19:03
Help With a simple Assembly program that uses external interrupts
In your case, putting a delay inside the ISR is the easiest solution (though not a good idea in general - ISRs should be short and fast as a rule).   A second approach, ...
Friday, 6 September 2019 - 18:06

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