Hello,

I built an open log for blackbox.  I want to use it to tune a micro scisky and a qx70 board on qx90 frames. I am new to tuning PID's and seem to burn out motors (they become stiff to turn by hand) when I get them set to where it feels locked in.  

My problem is where to attach them? On the scisky uart 2 (front right) with the connector is on the reciver, front left port is I2C. UART 1 is the msp, sounds like I could share that? Am I correct I would need to bypass the usb? Grab that line off the chip before the usb driver?

On the qx70, I have no idea where to access the other uarts. Do you know where the other uarts are located?

Thank you!
Bryan

Black box logging is not done with MSP, so you can't use UART1 for that. If you turn off MSP on UART1, you won't be able to connect the configurator to the flight controller any more.

From the looks of the QX70 flight controller, none of the UARTs are broken out anywhere, so your only option would be to solder directly to the MCU. That's a tricky soldering job even if you have some experience.

(31-Mar-2017, 06:00 AM)unseen Wrote: Black box logging is not done with MSP, so you can't use UART1 for that. If you turn off MSP on UART1, you won't be able to connect the configurator to the flight controller any more.

From the looks of the QX70 flight controller, none of the UARTs are broken out anywhere, so your only option would be to solder directly to the MCU. That's a tricky soldering job even if you have some experience.

Thanks for the reply.  I was under the impression from Oscars blog that Uart1 could be used as MSP for programming when arm is off, and blackbox when armed.  Just make sure both are not plugged in at once. 

The other problem I'm finding is that on the STM32F303CCt6 LQFP48 pin package the UART ports do not have pins to connect to.  Are the ports cleanflight/ betaflight uses actually USART ports? If so, port 3 in clean/beta would be on USART3, TX PB10, on pin 21?

Thanks!

(31-Mar-2017, 05:59 PM)Skypup831 Wrote: Thanks for the reply.  I was under the impression from Oscars blog that Uart1 could be used as MSP for programming when arm is off, and blackbox when armed.  Just make sure both are not plugged in at once. 

The other problem I'm finding is that on the STM32F303CCt6 LQFP48 pin package the UART ports do not have pins to connect to.  Are the ports cleanflight/ betaflight uses actually USART ports? If so, port 3 in clean/beta would be on USART3, TX PB10, on pin 21?

Thanks!

You may well be right there and it could be that the UART will change function once the quad is armed.

On the 48 pin package for STM32F303xC part, the three hardware UARTs are available as follows:

UART 1RX    Pin 43
UART 1TX    Pin 42

UART 2RX    Pin 13
UART 2TX    Pin 12

UART 3RX    Pin 22
UART 3TX    Pin 21


But which boards do you have exactly? On the SciSky there are quite a few different versions and some have at least UART2 broken out to a connector. The QX70 board, I don't know.

If the Scisky has a STM32F303 on it, AFAIK it has to be a v2.1 board.  The white connector is for use with a camera if you are using the overskyrc VTX solution. There might be uart connection(s) on the rows of pads along the edges of the board - there's a pinout on some of the overskyrc listings, like this one - http://www.overskyrc.com/scisky-micro-f3...p-742.html