The content of this topic has been archived on 28 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.
I found 2 free gpio pin and share my discover if someone could be interested in this model.
( I2c works on these free gpio pin without hardware modification )
Orange wire is soldier where it's write R3 on the board, it's pin 2 on gpio
White wire is soldier near the heatsink ( near C7 ), it's pin 5 on gpio.
(Last edited by Flopsoft on 22 Feb 2013, 12:22)
So here is my work on this router :
The small board on the top is just the rs232 transceiver.
I only use I2C with 2 gpio pins (2,5) . ( and 1 led removed as 3.3V switched power supply gpio 4 )
On the breadboard :
1 PCF8574 provide 8 IO ( with i2c driver these 8 IO are identified a 8 gpio pins -> easy to use ! )
1 PCF8591 provide 3 Analog input and 1 analog output ( but there is no drivers for this chip with bcm63xx so no emulated gpio pin ;-( one for ar7 exists, has someone the ability to make a bcm63xx version ??? )
1 PCF8574 to drive the lcd.
The router board provide :
- 3.3V switched power supply
- 5V power supply
- 12V power supply
The discussion might have continued from here.