Bitcraze Forums

Hey Hatty -- you're right. The INT pin is being used to read the data but IIRC the main reason for adding that feature was to reduce CPU busy time/polling. There's still no between the sensor loop and the PID loop. Implementing that probably holds the most potential for improvement and has been on m...

Thanks! Didn't know it was so easy to switch pins on the nRF -- I'll add that to my list of things to try.

Oh and I had some EE questions about re-routing the motor pins: 1) I've got a couple 1.2k resistors lying around from a previous project. Will it cause problems if I use those for M1 and M4 but M2 and M3 are left with 1k resistors on their pullups? 2) It'd be cool to keep CPPM working if a UART rece...

Alright, been doing some more thinking on this and here's where I've landed. To recap, I need a minimum of 2 UARTs to run OSD + Spektrum Rx. A third UART for GPS is a nice-to-have but not strictly required for FPV flying. I'd also like to preserve as many bigquad features as possible and minimize an...

Also, what are those pin connectors you've used for the ESC connectors? They're .1 right angles but the female connectors lie flat against the PCB instead of up in the air a bit.

Oh darn! I missed that the E_SDA/E_SCL I2C bus was hooked up to the EEPROM. I guess I assumed it was another internal I2C bus. I guess you're right that it should still work..but I'd rather not have to contend for access to the EEPROM. I might wanna add support for configuring stuff like PIDs via th...

On a second look, there's an SS34 on the 5v supply coming off my PDB, so shorting the SS12 on the bigquad deck is a safe solution even if I end up plugging in USB, right?

Hey bitcraze -- I'm modifying my bigquad deck a little bit to get two more UART ports. I need UART for GPS, an OSD, and a spektrum RX. I plan to repurpose the SCL and SDA lines for one UART, but the second is a little harder. RX2/RX2 will work, but are currently driving the signal to M1 and M4. So I...

Thanks Tobias. I think I might just run a separate pololu 5v regulator to power the cflie, since I've definitely found it useful to have USB plugged in for cflie debugging while also powering the esc's with a battery, and I'd rather not risk anything.

Hi Tobias -- thanks for the info. I brought my copter in to the office today and put it on an oscilloscope: I don't see any measureable voltage dips across VUSB or the 5v regulator output. Any other electrical factors that might contribute? Current draw? Would it help or be useful in any way to hook...