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Clock for 3.3v Arduino
03/20/2015 at 18:02 • 0 commentsChanging from pin 9 and
TCCR1B = TCCR1B & B11111000 | 0x05;
to pin 5 and
TCCR0B = TCCR0B & 0b11111000 | 0x05;
generates the correct clock signal.
What ever the clock signal is for the Uno, it is divided by two for the 8MHz 3.3v arduino.
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Possibilities
02/18/2015 at 02:45 • 0 commentsI am using an arduino pro mini 3.3v with the MS5541, and I think that the problem may be that the 3.3v version operates at 8MHz instead of 16MHz. I will try to put it on a scope and play with the timer values for the pwm, but I don't know if I will get anywhere. I havn't been able to find any tutorials about it anywhere.
I think that the other option will be to try to put a 3.3v reg on a 5v arduino and see how it works for me.
http://mewpro.cc/2014/10/25/yet-another-3-3vizing-an-arduino/
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Testing
02/14/2015 at 13:12 • 0 commentsI got it so that I am getting the same calibration words repeatedly, but not every time, and I don't seem to be getting a response for D1 and D2 which are the digital temp and pressure readings. When I put a multimeter on it it looks like it is responding, so I am hoping it is a timing issue. I will try putting a scope on it and see what I get.
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Test
02/11/2015 at 00:10 • 0 commentsHooked it up, and it is talking to me, but I can't make out what it is saying. Others on the blog say "It Works!"... Not for me.
I think I will probably have to put it on a scope and make sure that the timers are right.