Legacy Target SPRacingF3
Board - SPRacingF3​
The Seriously Pro Racing MOF3 board (SPRacingF3) is the first board designed specifically for INAV.
Full details available on the website, here:
http://seriouslypro.com/spracingf3
Hardware Features​
- No compromise I/O. Use all the features all the time; e.g. Connect your OSD + SmartPort + SBus + GPS + LED Strip + Battery Monitoring + HC-SR04 + 8 motors - all at the same time!
- On-board high-capacity black box flight log recorder - optimize your tuning and see the results of your setup without guesswork. (Acro and Deluxe)
- Next-generation STM32 F3 processor with hardware floating point unit for efficient flight calculations and faster ARM-Cortex M4 core.
- Stackable design - perfect for integrating with OSDs and power distribution boards.
- 16 PWM I/O lines for ESCs, Servos and legacy receivers. 8 available on standard pin headers. 8 via side mounted connectors.
- Supports SBus, SumH, SumD, Spektrum1024/2048, XBus, PPM, PWM receivers. No external inverters required (built-in).
- Dedicated output for programmable LEDs - great for orientation, racing and night flying.
- Dedicated I2C port for connection of OLED display without needing flight battery.
- Battery monitoring ports for voltage and current.
- Buzzer port for audible warnings and notifications.
- Solder pads in addition to connectors for HC-SR04, PPM, RSSI, Current, GPIO, LED Strip, 3.3v,
- Developer friendly debugging port (SWD) and boot mode selection, unbrickable bootloader.
- Symmetrical design for a super tidy wiring.
- Wire up using using pin headers, JST-SH sockets or solder pads. Use either right-angled or straight pin-headers.
- Barometer mounted on the bottom of the board for easy wind isolation.
Serial Ports​
| Value | Identifier | RX | TX | 5v Tolerant | Notes |
|---|---|---|---|---|---|
| 1 | USART1 | PA10 | PA9 | YES | Internally connected to USB port via CP2102 IC. Also available on a USART1 JST connector and on through hole pins. |
| 2 | USART2 | PA15 | PA14 | YES | Available on USART2 JST port only. |
| 3 | USART3 | PB11 / IO2_3 | PB10 / IO2_4 | NO | Available on IO_2, USART3 JST port and through hole pins. |
- You cannot use SWD and USART2 at the same time.
- You may encounter flashing problems if you have something connected to the USART1 RX/TX pins. Power other devices of and/or disconnect them.
Pinouts​
Full pinout details are available in the manual, here:
http://seriouslypro.com/spracingf3#manual
IO_1​
| Pin | Function | Notes |
|---|---|---|
| 1 | Ground | |
| 2 | VCC_IN | Voltage as-supplied by BEC. |
| 3 | RX_PPM | Enable feature RX_PPM |
| 4 | GPIO | |
| 5 | SoftSerial1_RX | |
| 6 | SoftSerial1_TX | |
| 7 | LED_STRIP | Enable feature LED_STRIP |
| 8 | VCC | 3.3v output for LOW CURRENT application only |
IO_2​
| Pin | Function | Notes |
|---|---|---|
| 1 | Ground | |
| 2 | VCC_IN | Voltage as-supplied by BEC. |
| 3 | RX_SERIAL | UART3 RX |
| 4 | UART3_TX | |
| 5 | HC-SR04_TRIG/SoftSerial2_RX | Enable feature SOFTSERIAL or HC-SR04 rangefinder |
| 6 | HC-SR04_ECHO/SoftSerial2_TX | Enable feature SOFTSERIAL or HC-SR04 rangefinder |
| 7 | ADC_1 | Current Sensor |
| 8 | ADC_2 | RSSI |
UART1/2/3​
| Pin | Function | Notes |
|---|---|---|
| 1 | Ground | |
| 2 | VCC_IN | Voltage as-supplied by BEC. |
| 3 | TXD | |
| 4 | RXD |
I2C​
| Pin | Function | Notes |
|---|---|---|
| 1 | Ground | |
| 2 | 5.0v | Voltage as-supplied by BEC OR USB, always on |
| 3 | SCL | |
| 4 | SDA |
SWD​
The port cannot be used at the same time as UART2.
| Pin | Function | Notes |
|---|---|---|
| 1 | Ground | |
| 2 | NRST | Voltage as-supplied by BEC OR USB, always on |
| 3 | SWDIO | |
| 4 | SWDCLK |