Duino644 - Use it

The best tutorials I have seen are, by far, those from adafruit.com. With the effort I can spend, I will never be able to write anything better than those instructionals. So, as the saying goes, "if you can't beat them, join them", I will try to mimic. (One item on my "to do" list is the building of a project site, with a "normal" navigation: projects listed on the left column, description on the wider right column. Hopefully, all these postings will eventually become project chapters. And, of course, one chapter will be named "Use it".)

As we already know by now, Duino644 can be used independently of the LED display from Sure Electronics (this is one of the reasons I re-named the board Duino644 from the original Wise4Sure), more like an Arduino (or, I should say Sanguino) is. For this purpose, all 4 "ports" are exposed through 4 headers (8-pin connectors). On the board, these ports are named PORT_A, PORT_B, PORT_C and PORT_D, and they are highlighted in the picture below.

Since Duino644 is compatible with (or "piggybacking on") Sanguino, here is the pin mapping used when programmed Arduino-style (that is, using digitalWrite/digitalRead rather than accessing the ports directly):

                  +---\/---+
(D 0) PB0  1|        |40  PA0 (AI 0 / D31)
(D 1) PB1  2|        |39  PA1 (AI 1 / D30)
INT2 (D 2) PB2  3|        |38  PA2 (AI 2 / D29)
PWM (D 3) PB3  4|        |37  PA3 (AI 3 / D28)
PWM (D 4) PB4  5|        |36  PA4 (AI 4 / D27)
MOSI (D 5) PB5  6|        |35  PA5 (AI 5 / D26)
MISO (D 6) PB6  7|   A    |34  PA6 (AI 6 / D25)
SCK (D 7) PB7  8|   T    |33  PA7 (AI 7 / D24)
RST  9|   M    |32  AREF
VCC 10|   E    |31  GND
GND 11|   G    |30  AVCC
XTAL2 12|   A    |29  PC7 (D 23)
XTAL1 13|        |28  PC6 (D 22)
RX0 (D 8)  PD0 14|   6    |27  PC5 (D 21) TDI
TX0 (D 9)  PD1 15|   4    |26  PC4 (D 20) TDO
INT0(D 10) PD2 16|   4    |25  PC3 (D 19) TMS
INT1(D 11) PD3 17|        |24  PC2 (D 18) TCK
PWM (D 12) PD4 18|        |23  PC1 (D 17) SDA
PWM (D 13) PD5 19|        |22  PC0 (D 16) SCL
PWM (D 14) PD6 20|        |21  PD7 (D 15) PWM
+--------+

(to be continued)

References:

• Sanguino.cc
• ATmega644 datasheet