## PixSurveyA1-IND Flight Controller
The PixSurveyA1-IND flight controller is an upgrade to PixSurveyA1, with better sensors and a better power solution; added a custom serial port. It is sold by a range of resellers listed on the makeflyeasy(http://www.makeflyeasy.com)
## Features
• STM32F427VIT6 and STM32F103C8T6 microcontroller
• Three IMUs, two ICM42688-P(SPI), one ICM40605(SPI)
• internal heater for IMUs temperature control
• internal Soft Rubber Damping Column isolation for All internal IMUs
• Two barometers, MS5611(SPI) x2
• builtin IST8310 magnetometer(internal I2C)
• builtin RAMTRON(SPI)
• microSD card slot(SPI)
• 5 UARTs
• USB(Type-C)
• PPM & S.Bus input
• 14 PWM outputs
• tow I2C ports and two FDCAN ports
• one S.Bus output
• External Buzzer
• two voltage & current monitoring
• servo rail BEC independent power input for servos
• external safety Switch
• 12V Power Output
## 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 |
+3.3V |
| 2 |
LED |
+3.3V |
| 3 |
SAFKEY |
+3.3V |
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 |
12V Power Output port
---------------------
| Pin |
Signal |
Volt |
| 1 |
GND |
GND |
| 2 |
VCC |
+12V |
| 3 |
GND |
GND |
S.BUS Output port
------------
| Pin |
Signal |
Volt |
| 1 |
SBUS.out |
+3.3V |
| 2 |
NC |
NC |
| 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.
Compass
-------
The PixSurveyA1-IND has a built-in compass. Due to potential interference, the autopilot is usually used with an external I2C compass as part of a GPS/Compass combination.
PWM Output
----------
The PixSurveyA1-IND supports up to 14 PWM outputs. First first 8 outputs (labelled 1 to 8) are controlled by a dedicated STM32F103 IO controller. These 8
outputs support all PWM output formats, but not DShot.
The remaining 6 outputs (labelled 9 to 14) are the "auxiliary"
outputs. These are directly attached to the STM32F427 and support all
PWM protocols as well as DShot.
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` =4
Then reboot.
:ref:`BATT_VOLT_PIN` 2
:ref:`BATT_CURR_PIN` 3
:ref:`BATT_VOLT_MULT` 18.0
:ref:`BATT_AMP_PERVLT` 24.0
:ref:`BATT2_VOLT_PIN` 14
:ref:`BATT2_CURR_PIN` 13
:ref:`BATT2_VOLT_MULT` 18.0
:ref:`BATT2_AMP_PERVLT` 24.0
DroneCAN capability
===================
There are 2 CAN ports that allow connecting two independent CAN bus outputs. Each of these can have multiple CAN peripheral devices connected.
Where to Buy
============
`makeflyeasy `_
[copywiki destination="plane,copter,rover,blimp"]