Aha! The BRG register is 9-bits, so your 0x63D became 0x3D => 250KHz (not sure why you got 100KHz). So apparently you cannot go so low @ 16MHz. The lowest setting would be 0x1FF => 31KHz.
Not sure why BT got messed up for you. Does it work with the stock v5.00 firmware for you? If so, something must be problematic with the build. I don't regularly build with XC16. As a side note, you probably want to use IOIOLib v5.03 and IOIODude v1.01 for a happier life (many little bug fixes in addition to the new features). On Thu, Mar 13, 2014 at 4:40 PM, Rich <[email protected]> wrote: > . . . I'm quite sure I'm running the Firmware I compiled. In one build I > verified that I can generate 1MHz signal using the Rate_1MHz setting (BRG > values{ 0x063D, 0x25, 0x0D }). I then I updated the firmware for the 3rd > BRG element ({ 0x063D, 0x25, 0x063D }) and received about 100KHz when > setting Rate to Rate_1MHz again. > > I first compiled everything in the firmware using MPLAB X and XC16. > Secondly, I used "tools/make-ioio-bundle firmware/app_layer_v1/dist/ > I2C_FirmWare.ioioapp IOIO0030" to create the bundle to download. > And finally I used "../IOIODude-0100/ioiodude --port=/dev/ttyACM0 --reset > write I2C_FirmWare.ioioapp" to download the firmware to the IOIO board. > This wrote to the device since there was Fingerprint mismatch. > > The Firmware I used was pulled from ioio-master. I modified the IOIO > Simple APP under IOIO400 to test the changes. I added the twi commands to > the button switch of which I could see output on the I2C lines with my > oscilloscope and verify the clock rates. > > I also noticed that my bluetooth dongle no longer flashed on, so I had to > wire directly to my cellphone. > > > > On Thursday, March 13, 2014 1:26:40 PM UTC-7, Rich wrote: >> >> May have replied directly with my reply and didn't post properly . . . >> please re-post question here if you got it, else I'll put it back up. >> Thanks. >> >> On Thursday, March 13, 2014 8:43:39 AM UTC-7, Ytai wrote: >>> >>> This seems the right place to change. Are you sure you are actually >>> running the firmware that you've modified? How did you install it on the >>> IOIO? >>> >>> >>> On Wed, Mar 12, 2014 at 8:06 PM, Rich <[email protected]> wrote: >>> >>>> Hello, >>>> >>>> I was wondering, has anyone (users and/or the IOIO inventor) >>>> experimented with modifying the I2C clock rates below and beyond the >>>> currently supported rates (100KHz, 400kHz, 1MHz)? >>>> >>>> I have a device that can only run at 10KHz . . . I updated line 129 in >>>> the i2c.c IOIO firmware source (static const unsigned int brg_values[] = { >>>> 0x063D, 0x25, 0x0D }; //first element updated from 0x9D for 10KHz), >>>> compiled and downloaded the firmware. Using the correct enum RATE value, I >>>> received about 100KHz on my oscilloscope showing the incorrect clock rate >>>> not the new 10KHz. I also built another firmware version updating all of >>>> the brg_values to 0x063D to ensure that the changes were being passed >>>> properly and I confirmed that when I set the TWI rate to 1MHz for instance, >>>> I also receive 100KHz. >>>> >>>> Does the internal clock runs at 32 MHz? Any possible issues with >>>> modifying these values? I don't see anything in the PIC24 datasheet showing >>>> that I am limited to these three clock rates. Can anyone confirm? >>>> >>>> >>>> Thanks for your help and assistance. >>>> >>>> Best, >>>> Rich >>>> >>>> -- >>>> 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.
