2024-03-20 16:11:35 -03:00
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# FoxeerF405v2 Flight Controller
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The FoxeerF405v2 is a flight controller produced by [Foxeer](https://www.foxeer.com/).
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## Features
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- MCU - STM32F405 32-bit processor
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- IMU - ICM42688
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- Barometer - DPS310
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- OSD - AT7456E
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- Onboard Flash: 128Mbit
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- 6x UARTs
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- 9x PWM Outputs (8 Motor Output, 1 LED)
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- Battery input voltage: 2S-8S
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- BEC 3.3V 0.5A
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- BEC 5V 2A
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- BEC 10V 2A
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## Pinout
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## UART Mapping
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The UARTs are marked Rn and Tn in the above pinouts. The Rn pin is the
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receive pin for UARTn. The Tn pin is the transmit pin for UARTn.
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- SERIAL0 -> USB
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- SERIAL1 -> UART1 (ESC Telemetry)
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- SERIAL2 -> UART2 (RX, DMA-enabled)
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- SERIAL3 -> UART3 (VTX Tramp)
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- SERIAL4 -> UART4 (MSP DisplayPort, DMA-enabled)
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- SERIAL5 -> UART5 (GPS, DMA-enabled)
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- SERIAL6 -> UART6 (RX in DJI connector)
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## RC Input
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RC input is configured by default on the R2 (UART2_RX) pad. It supports all serial RC
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protocols. Half-duplex serial protocols should be configured on T2 (UART2_TX). RC input is also
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supported on UART6_RX within the DJI connector, although because it is not inverted it cannot be
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used for SBUS.
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## OSD Support
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The FoxeerF405v2 supports OSD using OSD_TYPE 1 (MAX7456 driver) or OSD_TYPE 3 if using DJI OSD
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## PWM Output
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The FoxeerF405v2 supports up to 9 PWM outputs. The pads for motor output
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M1 to M8 are provided on both the motor connectors and on separate pads, plus
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M9 on a separate pad for LED strip or another PWM output.
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The PWM is in 4 groups:
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- PWM 1,4 in group1
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- PWM 2,3 in group2
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- PWM 5,9 in group3
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- PWM 6-8 in group4
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Channels within the same group need to use the same output rate. If
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any channel in a group uses DShot then all channels in the group need
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to use DShot. Note that channel 9 is explicitly configured as NeoPixel output
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which means that channel 5 cannot be used as a motor output without disabling NeoPixel
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support on channel 9.
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## Battery Monitoring
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The board has a builting voltage and current sensor. The current
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sensor can read up to 130 Amps. The voltage sensor can handle up to 8S
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LiPo batteries.
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The correct battery setting parameters are:
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- BATT_MONITOR 4
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- BATT_VOLT_PIN 10
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- BATT_CURR_PIN 11
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- BATT_VOLT_MULT 11
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- BATT_AMP_PERVLT 142.9
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## Compass
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The FoxeerF405v2 does not have a builtin compass, but you can attach an external compass using I2C on the SDA and SCL pads.
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## Control GPIO pins
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GPIO pin 71 can be used to control camera switching. It is configured
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by default on relay 3 and so you can associate an RC switch with relay 3 in order
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to switch camera outputs.
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2024-03-20 16:11:35 -03:00
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## Loading Firmware
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Initial firmware load can be done with DFU by plugging in USB with the
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bootloader button pressed. Then you should load the "with_bl.hex"
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firmware, using your favourite DFU loading tool.
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Once the initial firmware is loaded you can update the firmware using
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any ArduPilot ground station software. Updates should be done with the
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*.apj firmware files.
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