jcarrano / flyx5-avionics

Geek Repo:Geek Repo

Github PK Tool:Github PK Tool

FlyX5 Hardware

This is the circuit board for the FlyX5 UAV controller. See here for the firmware that runs on the controller board.

FlyX5 Revision 0 Board

Main board: flx_control

  • Flight Stabilization and control.
  • Tested. Works (except for errata listed below).

Features:

  • Compact size: 54.5mm x 45.2mm
  • Builtin buck converter: can be powered directly by batteries and provides 5V up to 1A.
  • 3 Leds, 3 Buttons (2 programmable + reset).
  • Microprocessor: TI Tiva-C (ARM M4F) with hardware floating point support.
  • Supports up to 8 ESC. ESC ports can be configured as PWM or SPI.
  • Radio-control port: 6 channels PWM input. Can be reconfigured as up to 3 duplex serial ports.
  • Dedicated Serial Port.
  • 2 Analog sense ports for battery sensing.
  • Buzzer (with melodies)
  • SD card slot.
  • Expansion port (SPI+Power+2GPIO). Matches the pinout of a NRF2404+ module
  • Gyro+Accelerometer: Invensense MPU-6500
  • Magnetometer: Freescale MAG3110
  • Altimeter: Freescale MPL3115A2
  • Port for connecting ultrasonic ranger.

3D rendering of PCB

Debugging and tinkering:

  • JTAG port (can be programmed (and debugged) with a Tiva-C eval board and OpenOCD, no fancy HW required)
  • Way too many testpoints.

Errata

  • On the first version, SDA and SCL lines for one I2C bus were reversed.
  • The buzzer driver circuit is designed for magnetic buzzers. For piezo buzzers it requires a pull resistor. Newer versions should include a push-pull driver instead.
  • The MCU has an errata, which has been worked around both in SW and HW.

ESC controller board: flx_esc

SUPER experimental.

Features:

  • Digital control via SPI: no more trimming/calibrating the PWM
  • SPI allows reporting current motor speed (along with other parameters) back to control board.
  • Uses a crystal for timing: no trimming or calibrating time.
  • Processor: Kinetis KE02 (ARM M0+) allows for more advanced calculations (for example square root compensation for directly controlling thrust instead of speed)