FTDI ATmega

FTDI-atmega

This is the documentation page for the FTDI-atmega PCB.

overview

The FTDI-atmega PCB has an USB connector and a 20-pin IO connector. The brains of the PCB is an ATmega168 chip.

pinout

The 20 pin connector is connected as follows

1	GND
2	GND
3	PC3
4	PC2
5	PC1
6	PC0
7	PB5
8	PB4
9	PB3
10	PB2
11	PB1
12	PB0
13	PD7
14	PD6
15	PD5
16	PD4
17	PD3
18	PD2
19	VCC
20	VCC

• led1 is connected to VCC
• led2 is connected to CBUS0 (FT232RL)
• led3 is connected to CBUS1 (FT232RL)
• led4 is connected to PC5
• led5 is connected to PC4

programming

This section describes how you get your program into the processor.

Linux

You can program the processor using any ICSP programmer that you might have. In that case, the jumper SV1 should then be in the upper position (away from the ICSP connector).

Or you can program it with the ftdi bitbang programmer included on the board.

Here is the documentation: http://www.geocities.jp/arduino_diecimila/bootloader/index_en.html

The ftdi-bitbang programmer-driver for avrdude is not included in the standard avrdude program. The reason is that the patch uses the ftdi library FTD2xx and not the open source libftdi.

In the avrdude bug tracking system another patch is doing the rounds, but that one is really slow because it doesn't exploit the ftdi's synchronous mode.

TODO: port the fast ftdi bitbang code to libftdi and submit to avrdude.

windows

See the linux section above.

writing programs

The chip is an ATmega168. http://www.atmel.com/dyn/resources/prod_documents/doc2545.pdf