OK, I got around to reading the datasheet. The 0x3C/0x3D that you're sending is part of the address. You shouldn't send it. Also, make sure you check the return value of writeRead() or else you'd be reading garbage.
On Sun, Oct 18, 2015 at 7:34 AM, <[email protected]> wrote: > Yes, I have two pull up resistors (10 kOhm) from pins 4 and 5 to > 3.3V(IOIO) is that correct way of connecting them ? When I measure the > resistance connected I get about 6.6 kOhm. > I don't have any delays between writeRead commands, but I am running the > code with debugger, and all reads from the sensor always return 0's. > I also tried to change > > TwiMaster.Rate.RATE_100KHz > when opening twi-line, but the same result > > > perjantai 16. lokakuuta 2015 19.04.04 UTC+3 Ytai kirjoitti: >> >> Did you remember pull up resistors on the bus? >> On Oct 16, 2015 8:50 AM, "Tyler Trombetta" <[email protected]> wrote: >> >>> I went back and re-read the data sheet more thoroughly, and it appears I >>> was wrong. I just found the example on page 18 that details how to take a >>> single measurement. Looking at your first post, I see that's where your >>> code comes from. I now think you did everything right, except for waiting 6 >>> ms for the data to be placed into the data registers. >>> >>> So, I would revert back to your first code attempt, but place the line: >>> Thread.sleep(6); >>> after writeRead() command #2, to have the IOIO wait 6 ms for the data to >>> be available. Then you should be able to properly read the data. >>> >>> It can't hurt to write to the configuration registers before the >>> measurement (as in the example), so I would recommend that as well. Sorry >>> to lead you down the wrong trail. >>> >>> Tyler >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "ioio-users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/ioio-users. >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
