Work in progress
The Revolution is a full 10DoF flight controller board capable of stabilizing various aircrafts ranging from small racing miniquads to large FPV fixed wing models and aerial photography platforms.
Along side standard stabilization modes it also supports various GPS assisted modes and GPS navigation flight.
Hardware Description
CPU
Main processor is a STM32F405RGT6 ARM Cortex-M4 microcontroller.
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36x36mm with 30,5x30,5mm hole spacing
Connectivity
Powering the board
Board can be powered with 4,8-15V 10V DC power supply, usually from one of ESCs integrated BECs or an external 5V BEC. The voltage used to power the board will also power any peripheral devices like GPS, Bluetooth modem,... connected to it.
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- Standard PWM with configurable rate from 50Hz to 490Hz
- PWMSync (PWM synchronized to the gyro sampling rate)
- OneShot125
Pinout:
PWM Out 6 | PWM Out 5 | PWM Out 4 | PWM Out 3 | PWM Out 2 | PWM Out 1 |
| Vcc | Vcc | Vcc | Vcc | Vcc | Vcc |
| GND | GND | GND | GND | GND | GND |
FlexIO Port
It's primary use is as a receiver port compatible with PWM and PPM receivers, but can also be used to provide up to 6 additional PWM outputs, serial telemetry port, and two GPIO pins.
The connector used is a 10pin JST-HSSH
Pinout:
| Pin | Wire Color | PPM In | PWM In | Telemetry | PWM Out |
|---|---|---|---|---|---|
| 1 | Black | GND | |||
| 2 | Red | Vcc (4,8- | |||
| 10V DC) | |||
| 3 | |||
| 4 |
| 5 | White | PPM In | PWM In 1 |
| PWM Out 12 | ||
| 6 | Blue |
| PWM In 2 |
| PWM Out 7 | ||
| 7 | Yellow |
| PWM In 3 | Tx | PWM Out 8 | ||
| 8 | Green |
| PWM In 4 | Rx | PWM Out 9 | ||
| 9 | Orange |
| PWM In 5 |
| PWM Out 10 | ||
| 10 | Violet |
| PWM In 6 |
| PWM Out 11 |
Main Port
This is a UART serial port with a programmable inverter on the Rx pin. It can be used to connect various serial devices such as GPS receiver, OSD, Telemetry (Bluetooth, OPLink, etc.), S.Bus receiver, DSM satellite receiver...
The conector used is a 4pin JST-HSSH.
Pinout:
| Pin | Wire Color | Telemetry | GPS | OSD | DSM | S.Bus |
|---|---|---|---|---|---|---|
| 1 | Black | GND | ||||
| 2 | Red | Vcc (4,8- | ||||
| 10V DC) | ||||
| 3 | Blue | Tx | ||
| 4 | Orange | Rx | DSM In | S.Bus In | ||
| Info |
|---|
The Tx and Rx lines between the controller and device must be connected: Rx to Tx and Tx to Rx. If you connect Rx to Rx and Tx to Tx, serial communication will not work. |
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This port can support both UART and I2C serial devices, such as external I2C sensors (external magnetometer), GPS, OSD, Telemetry, DSM receiver, SRXL receiver,...
The conector connector used is a 4pin JST-HSSH.
Pinout:
| Pin | Wire Color | Telemetry | GPS | OSD | DSM | SRXL | I2C |
|---|---|---|---|---|---|---|---|
| 1 | Black | GND | |||||
| 2 | Red | Vcc (4,8- | |||||
| 10V DC) | |||||
| 3 | Blue | Tx | |||
| SCL | |||||||
| 4 | Orange | Rx | DSM In | SRXL In | SDA | ||
| Info |
|---|
The Tx and Rx lines between the controller and device must be connected: Rx to Tx and Tx to Rx. If you connect Rx to Rx and Tx to Tx, serial communication will not work. |
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This port has two analog inputs that can be used to connect analog sensors such as voltage, current, analog airspeed sensor... It can also be used to connect a sonar, but that functionality currently isn't implemented.
The conector connector used is a 4pin JST-HSSH.
Pinout:
| Pin | Analog In |
|---|
| 1 | GND |
| 2 | Vcc |
| 3 | ADC 0 |
| 4 | ADC 1 |
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Antenna Connector
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433MHz antenna for the integrated modem should be connected here.
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The flight controller presents itself to the PC as a HID (Human Interface Device) and VCP (Virtual Comm Com Port) device.
The HID part comes configured for telemetry and is used to configure, update and debug your flight controller.
The VCP can be used for telemetry and CommBridge ComBridge functionality which binds Main or Flexi port to be used as a comm com port from your PC (useful for configuring your OSD without needing to rip it out of your airframe)
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This port is used by developers for flashing and debuging debugging the firmware. Most users will never have to use it.
Pinout:
| Pnn | Function |
|---|---|
| 1 | GND |
| 2 | NRST |
| 3 | SWDIO |
| 4 | SWDCLK |