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PixFlamingo-F767 Flight Controller

The PixFlamingo-F767 is a flight controller produced by Dheeran Labs. Contact dheeranlabs@gmail.com for sales

Features

Processor
    STM32F767 32-bit processor
Onboard Flash: 2048Mbits
Sensors
    Two IMU : ICM42670, MPU6500/ICM20602 Acc/Gyro
    One Baro : Internal MS5611/BMP280/DPS310 SPI barometer
Internal LIS3MDL Compass
Power
    5v input voltage with voltage monitoring
Interfaces
    10x PWM outputs 
    1x RC input
    5x UARTs/serial for GPS and other peripherals
    2x I2C ports for external compass, airspeed, etc.
microSD card slot port
Internal RGB LED
Safety switch port
Buzzer port
    USB-C port

Connectors

POWER ADC

Pin Signal Volt
1 VCC_IN +5V
2 VCC_IN +5V
3 BAT_CRRENT_ADC +3.3V
4 BAT_VOLTAGE_ADC +3.3V
5 GND GND
6 GND GND

TELEM1

Pin Signal Volt
1 VCC +5V
2 UART_TX3 +3.3V
3 UART_RX3 +3.3V
4 CTS +3.3V
5 RTS +3.3V
6 GND GND

TELEM2

Pin Signal Volt
1 VCC +5V
2 UART_TX6 +3.3V
3 UART_RX6 +3.3V
4 CTS +3.3V
5 RTS +3.3V
6 GND GND

GPS1

Pin Signal Volt
1 VCC +5V
2 UART_TX1 +3.3V
3 UART_RX1 +3.3V
4 I2C2_SCL +3.3V
5 I2C2_SDA +3.3V
6 GND GND

GPS2

Pin Signal Volt
1 VCC +5V
2 UART_TX7 +3.3V
3 UART_RX7 +3.3V
4 X X
5 X X
6 GND GND

SAFETY

Pin Signal Volt
1 SAFETY_SW +3.3V
2 SAFETY_SW_LED +3.3V
3 3V3_OUT +3.3V
4 BUZZER+ +3.3V
5 BUZZER- GND

UART Mapping

The UARTs are marked Rn and Tn in the above pinouts. The Rn pin is the receive pin for UARTn. The Tn pin is the transmit pin for UARTn.

  • SERIAL0 -> USB (OTG1)
  • SERIAL1 -> UART3 (TELEM1) with CTS/RTS DMA Enabled
  • SERIAL2 -> UART6 (TELEM2) with DMA Enabled
  • SERIAL3 -> UART1 (GPS1) Tx(NODMA), Rx(DMA Enabled)
  • SERIAL4 -> EMPTY
  • SERIAL5 -> UART7 (GPS2) NODMA
  • SERIAL6 -> USART2 (User) NODMA

RC Input

Supports I-Bus/S-bus

Any UART can be used for RC system connections in ArduPilot also, and is compatible with all protocols except PPM. See Radio Control Systems for details.

PWM Output

The PixFlaminog-F767 supports up to 10 PWM outputs.

The PWM is in 5 groups:

  • PWM 1-4 in group1
  • PWM 5-8 in group2
  • PWM 9 in group3
  • PWM 10 in group4

GPIOs

All 10 PWM channels can be used for GPIO functions (relays, buttons, RPM etc).

The pin numbers for these PWM channels in ArduPilot are shown below:

PWM Channels Pin PWM Channels Pin
PWM1 50 PWM8 57
PWM2 51 PWM9 58
PWM3 52 PWM10 59
PWM4 53
PWM5 54
PWM6 55
PWM7 56

Analog inputs

The PixFlamingo-F767 flight controller has 4 analog inputs

  • ADC Pin10 -> Battery Current
  • ADC Pin11 -> Battery Voltage
  • ADC Pin14 -> ADC 3V3 Sense
  • ADC Pin15 -> ADC 6V6 Sense

Battery Monitor Configuration

The board has voltage and current sensor inputs on the POWER_ADC connector.

The correct battery setting parameters are:

Enable Battery monitor.

BATT_MONITOR =4

Then reboot.

BATT_VOLT_PIN 11

BATT_CURR_PIN 10

BATT_VOLT_MULT 10.1 (may need adjustment if supplied monitor is not used)

BATT_AMP_PERVLT 17.0 (may need adjustment if supplied monitor is not used)

Build the FC

./waf configure --board=PixFlamingo-F767 ./waf copter

The compiled firmware is located in folder "build/PixFlamingo-F767/bin/arducopter.apj".

Loading Firmware

The PixFlamingo-F767 flight controller comes pre-installed with an ArduPilot compatible bootloader, allowing the loading of *.apj firmware files with any ArduPilot compatible ground station.