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86 lines
2.7 KiB
Markdown
86 lines
2.7 KiB
Markdown
# Board - Airbot F4 / Flip32 F4 / Generic F4 Flight Controller from Banggood and Aliexpress
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> This target supports both MPU6000 and MPU6500 versions of this board
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## Features
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* STM32F405 CPU
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* Integrated Accelerometer/Gyro MPU6000 or MPU6500 via SPI bus
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* 6 motor outputs
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* 4 UART ports (UART1, UART3, UART6, Softserial1)
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* External I2C bus, pins shared with UART3, can not be used simultaneously
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* Only UART1 is equipped with inverter
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* Onboard 128Mbit (16MB) flash
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* BLHeli Passthrough
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* Integrated voltage stabilizer
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* Buzzer connector
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## **NOT** supported
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* HC-SR04 Rangefinder
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* ServoTilt
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## Radio Receivers
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SerialRX, PPM and MSP receivers are supported.
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SerialRX and PPM receivers should be connected to dedicated _PPM SBUS_ connector above _Motor 1_. MSP receivers should be connected to one of UARTs configured as MSP.
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## Motors
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| Motor | pin | Shared with |
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| ---- | ---- | ---- |
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| 1 | PB0 | |
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| 2 | PB1 | |
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| 3 | PA3 | |
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| 4 | PA2 | |
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| 5 | PA1 | LED Strip |
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| 6 | PA8 | |
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## USB
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This board uses STM32 VCP and _not_ utilizes UART when USB is connected. STM32 VCP drivers might be required!
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Flashing requires DFU mode and STM32 DFU drivers. Use [Zadig](http://zadig.akeo.ie) tool to install WinUSB driver on Windows.
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## Buzzer / Beeper
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5V piezo buzzer should be connected directly to dedicated pins _BUZ +_ and _BUZ -_. No additional hardware is required.
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## RSSI ADC
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* Connected to pin PA0
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* 3.3V tolerant, do not supply 5V
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## Current Meter ADC
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* Connected to pin PC1
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* 3.3V tolerant, do not supply 5V
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## Voltage monitoring
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* Connected to pin PC2
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* Connected to VBAT pins (both are the same) and integrated Voltage Stabilizer (LM7805M)
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## Integrated voltage stabilizer
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It is integrated with voltage monitoring and always powered when VBAT is connected to battery.
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Because this is **Linear Stabilizer**, it has a tendency to overheat, especially on 4S. Because of that,
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avoid powering too many devices directly to 5V pins on the board. RX receiver is (and board itself) is rather all
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it can do without overeating (150mA on 4S gives 1.5W of waste heat!). OSD, LED Strip and other devices should powered from separate BEC if voltage monitoring is to be enabled.
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## LED Strip
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LED strip is enabled on Motor 5 pin (PA1)
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## SoftwareSerial
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This board allows for single **SoftwareSerial** port on small soldering pads located next to UART3 pins.
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| Pad | SoftwareSerial Role |
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| ---- | ---- |
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| CH5 | RX |
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| CH6 | TX |
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