ardupilot/libraries/AP_HAL_ChibiOS/hwdef/PixPilot-C3

PixPilot-C3 Flight Controller

The PixPilot-C3 flight controller is sold by a range of resellers listed on the makeflyeasy(http://www.makeflyeasy.com)

Features

• STM32F427VIT6 and STM32F103C8T6 microcontroller

• two IMUs, two ICM42688-P(SPI)

• Two barometers, BMP388(SPI)

• builtin RAMTRON(SPI)

• microSD card slot

• 5 UARTs

• USB(Type-C)

• PPM, S.Bus & DSM input

• 14 PWM outputs

• tow I2C ports and two FDCAN ports

• one S.Bus output

• builtin Buzzer

• builtin LED

• two voltage & current monitoring

• servo rail BEC independent power input for servos

• external safety Switch

Pinout

UART Mapping

• SERIAL0 -> console (primary mavlink, usually USB)
• SERIAL1 -> USART2 (telem1, DMA-enabled)
• SERIAL2 -> USART3 (Telem2, DMA-enabled)
• SERIAL3 -> UART4 (GPS1)
• SERIAL4 -> UART8 (GPS2, DMA-enabled)
• SERIAL5 -> UART7 (USER)

Connector pin assignments

TELEM1, TELEM2 ports

Pin	Signal	Volt
1	VCC	+5V
2	TX (OUT)	+3.3V
3	RX (IN)	+3.3V
4	GND	GND

I2C1, I2C2 ports

PIN	SIGNAL	VOLT
1	VCC	+5V
2	SCL	+3.3V
3	SDA	+3.3V
4	GND	GND

CAN1, CAN2 ports

PIN	SIGNAL	VOLT
1	VCC	+5V
2	CAN_H	+12V
3	CAN_L	+12V
4	GND	GND

Safety port

PIN	SIGNAL	VOLT
1	VCC	+5V
2	LED	+5V
3	SAFKEY	+5V

GPS1/I2C1, GPS2/I2C2 ports

PIN	SIGNAL	VOLT
1	VCC	+5V
2	TX	+3.3V
3	RX	+3.3V
4	SCL	+3.3V
5	SDA	+3.3V
6	GND	GND

Serial5 port

Pin	Signal	Volt
1	VCC	+5V
2	TX (OUT)	+3.3V
3	RX (IN)	+3.3V
4	GND	GND

Power1, Power2 ports

PIN	SIGNAL	VOLT
1	VCC	+5V
2	VCC	+5V
3	CURRENT	+3.3V
4	VOLTAGE	+3.3V
5	GND	GND
6	GND	GND

DSM port

Pin	Signal	Volt
1	VCC	+3.3V
2	RX	+3.3V
3	GND	GND

RC Input

All compatible RC protocols can be decoded by attaching the Receiver's output to the SBUS input pin next to the Servo/Output VCC input connector. Note that some protocols such as CRSF or FPort including telemetry, require connection to, and setup of, one of the UARTs instead of this pin.

PWM Output

The PixPilot-V3 supports up to 14 PWM outputs. First first 8 outputs (labelled S1 to S8) are controlled by a dedicated STM32F103 IO controller. These 8 outputs support all PWM output formats, but not DShot.

The remaining 6 outputs (labelled AUX1 to AUX6) are the "auxiliary" outputs. These are directly attached to the STM32F427 and support all PWM protocols as well as DShot.

All 14 PWM outputs have GND on the top row, 5V on the middle row and signal on the bottom row.

The 8 main PWM outputs are in 3 groups:

• PWM 1 and 2 in group1
• PWM 3 and 4 in group2
• PWM 5, 6, 7 and 8 in group3

The 6 auxiliary PWM outputs are in 2 groups:

• PWM 1, 2, 3 and 4 in group1
• PWM 5 and 6 in group2

Channels within the same group need to use the same output rate. If any channel in a group uses DShot then all channels in the group need to use DShot.

Battery Monitor Settings

These should already be set by default. However, if lost or changed:

Enable Battery monitor with these parameter settings :

:ref:BATT_MONITOR<BATT_MONITOR> =4

Then reboot.

:ref:BATT_VOLT_PIN<BATT_VOLT_PIN> 2

:ref:BATT_CURR_PIN<BATT_CURR_PIN> 3

:ref:BATT_VOLT_MULT<BATT_VOLT_MULT> 18.0

:ref:BATT_AMP_PERVLT<BATT_AMP_PERVLT> 24.0

:ref:BATT2_VOLT_PIN<BATT2_VOLT_PIN> 14

:ref:BATT2_CURR_PIN<BATT2_CURR_PIN> 13

:ref:BATT2_VOLT_MULT<BATT2_VOLT_MULT> 18.0

:ref:BATT2_AMP_PERVLT<BATT2_AMP_PERVLT> 24.0

DroneCAN capability

There are 2 CAN ports which allow connecting two independant CAN bus outputs. Each of these can have multiple CAN peripheral devices connected.

Where to Buy

makeflyeasy <http://www.makeflyeasy.com>_

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