Fortuna Connector

This is a connector that plugs a Raspberry Pi to a board, and can be used to:

• Have a Raspberry Pi programming multiple microcontroller types in the board (AVR, ARM, etc.)
• Debug protocols in the board using the Raspberry Pi (UART, SPI, I²C, SWD)

The connector contains:

• A female header to connect to the Raspberry Pi GPIOs
• A male header to connect the Raspberry Pi to the board using a flat cable.
• A male and female header to help debug any problems in communication (for example, using a digital analyzer)
• A button to turn on/off power from the Pi to the board.
• LEDs indicating power and activity in the protocols.

ISCP programmer

Photos

Main connector pinout

Top side

Pin	Type	Classification	Pin in RPI	# pin in RPI
1	MOSI	SPI	MOSI (GPIO10)	19
2	RX	Serial	RDX	10
3	RST	SPI	GPIO1	28
4	SCK	SPI	SCK (GPIO11)	23
5	MISO	SPI	MISO (GPIO9)	21

Bottom side (notch)

Pin	Type	Classification	Pin in RPI	# pin in RPI
6, 7, 8	GND	Power	GND	6, 9, 14, 25, 30, 34, 39
9	TX	Serial	TDX	8
10	VCC	Power	5V or 3V3	2, 4

Schematic

Software

A few sample project skeletons are provided in the package.

The Makefile needs to be configured to choose the correct MCU, speed, etc.. The following make commands are available:

• make: compile source code
• make size: print size of executable generated for the MCU
• make test-connection: test if communication with the MCU is working
• make fuse: program fuses (AVR only)
• make upload: upload executable to the MCU
• make talk: opens a serial connection from the computer to the MCU
• make clean: delete the intermediate files generated

A program called reset is also made available that simply resets the MCU.