Post Created date
Very tempting
I don't really need another 'scope, the ones I have work very well, but I can get itchy about buying a new one now and then.   No thanks to you, avrcandies, for the link to...
Tuesday, 21 January 2020 - 19:29
Ring Buffer vs Array Buffer
As an aside, just how long and complicated are these ASCII queries for 'a couple of sensors'?  Are you trying to parse them like a 70's text adventure, "Please tell me the...
Tuesday, 21 January 2020 - 19:23
Ring Buffer vs Array Buffer
I'd use a straight buffer, but that's mostly because ring buffers are a bit less fun in assembler.  I like your "set flag at EOL, says command has arrived in full, then read'...
Tuesday, 21 January 2020 - 19:00
Voltage disturbance
avrcandies wrote: Even though you are "seeing"noise, is the data being received ok, at its destination?   One of the beautiful bits of differential communication is that...
Tuesday, 21 January 2020 - 10:41
Accurate 8-bit timer using 16MHz crystal
I get about 0.12 seconds of plausible error out of a 100ppm 16MHz XTAL over 20 minutes.  That would be easily detectable by eye.   Suggestion for the OP:  Put it in...
Tuesday, 21 January 2020 - 10:32
What to do with these......
I once did a lot of work on a CNC woodcutting machine (a big puppy - it would handle 4x8 sheets easily) that had four motor drive power supplies built with things like that....
Sunday, 19 January 2020 - 05:04
What to do with these......
One way of making a nice variable power supply out of things like that is just hook 'em up to a rectifier then power them through a Variac*.  S.   * adjustable...
Saturday, 18 January 2020 - 06:07
C Code Column Byte from Row Bytes (Array)
Bit Store would be better than my rolling ops because the OP only wants six bits.  My version doesn't scale down to omit bits very well at all.  S.
Friday, 17 January 2020 - 17:36
C Code Column Byte from Row Bytes (Array)
Incidentally (not that anyone cares ) I wrote that ARRAY_ROT routine originally to do something very similar - eight serial devices on one 8-bit port (PortB on a tiny2313) - but I...
Friday, 17 January 2020 - 11:36
C Code Column Byte from Row Bytes (Array)
Looking further at your extended design, I think you need to have another re-think of the hardware.  What you really need aren't so much shift registers, as six chips that'll...
Friday, 17 January 2020 - 11:00
C Code Column Byte from Row Bytes (Array)
neil.badenhorst@gmail.com wrote: Thanks.  Do you know how long this code takes to run ?   One could count the cycles, I suppose.    In the loop there's...
Friday, 17 January 2020 - 10:23
C Code Column Byte from Row Bytes (Array)
Looks like what you really want to do is rotate the array 90degrees.  If your array contained:   ABCD EFGH aBCD EFGH AbCD EFGH abCD EFGH ABcD EFGH aBcD EFGH AbcD EFGH...
Friday, 17 January 2020 - 07:17

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