Holybro Kakute F7 (Discontinued)
Last updated
Last updated
:::warning PX4 does not manufacture this (or any) autopilot. Contact the manufacturer for hardware support or compliance issues. :::
The Kakute F7 from Holybro is a flight controller board designed for racers.
:::note This flight controller is manufacturer supported. :::
Main System-on-Chip: STM32F745VGT6
CPU: 216 MHz ARM Cortex M7 with single-precision FPU
RAM: 320 KB SRAM
FLASH: 1 MB
Standard racer form factor: 36x36 mm with standard 30.5 mm hole pattern
ICM20689 Accel / Gyro (Soft-mounted)
BMP280 Baro
microSD (for logging)
6 UARTs
1 I2C bus
6 PWM outputs
Built-in OSD chip (AB7456 via SPI)
The board can be bought from one of the following shops (for example):
:::tip The Kakute F7 is designed to work with the Tekko32 4-in-1 ESC and they can be bought in combination. :::
This is the silkscreen for the Kakute F7, showing the top of the board:
B+
Battery positive voltage (2S-6S)
5V
5V output (2A max)
VO
Video output to video transmitter
VI
Video input from FPV camera
G or GND
Ground
SDA, SCL
I2C connection (for peripherals)
R1, T1
UART1 RX and TX
TELEM1
R2, T2
UART2 RX and TX
TELEM2
R3, T3
UART3 RX and TX
NuttX debug console
R4, T4
UART4 RX and TX
GPS1
R6, T6
UART6 RX and TX
RC port
R7, T7
UART7 RX and TX (RX is located in the plug for use with 4-in-1 ESCs)
DShot telemetry
LED
WS2182 addressable LED signal wire (not tested)
Buz-
Piezo buzzer negative leg (Connect buzzer positive leg to 5V pad)
3V3
3.3V output (200 mA max)
M1 to M4
Motor signal outputs (located in plug for use in 4-in-1 ESCs)
M5, M6
Additional motor signal outputs (located on side of board)
RSI
Analog RSSI (0-3.3V) input from receiver
Boot
Bootloader button
The board comes pre-installed with Betaflight. Before PX4 firmware can be installed, the PX4 bootloader must be flashed. Download the kakutef7_bl.hex bootloader binary and read this page for flashing instructions.
To build PX4 for this target:
The firmware can be installed in any of the normal ways:
Build and upload the source
Load the firmware using QGroundControl. You can use either pre-built firmware or your own custom firmware.
If you use a 4-in-1 ESC with Betaflight/Cleanflight motor assignment you can use the Actuator configuration UI to set the motor ordering appropriately.
In addition to the basic configuration, the following parameters are important:
This should be disabled since the board does not have an internal mag. You can enable it if you attach an external mag.
USART1
/dev/ttyS0
TELEM1
USART2
/dev/ttyS1
TELEM2
USART3
/dev/ttyS2
Debug Console
UART4
/dev/ttyS3
GPS1
USART6
/dev/ttyS4
RC SBUS
UART7
/dev/ttyS5
ESC telemetry (DShot)
UART3 RX and TX are configured for use as the System Console.
The SWD interface (JTAG) pins are:
SWCLK: Test Point 2 (Pin 72 on the CPU)
SWDIO: Test Point 3 (Pin 76 on CPU)
GND: As marked on board
VDD_3V3: As marked on board
These are shown below.
