Pixl.js & MCP23017 connected using I2C

Hi Gordon,

http://microcosm.app/out/zEd6h is full working but it was not simple for me to understand how it manages I2C bus.

I printed data sent from Espruino to MCP23017 thru function ' p._w = function(r,dArr) { this.i2c.writeTo(0x20,r,dArr); print (r,dArr); return this; }; '

Comparing it with MCP23017 it was easy to write minimun code to use bank A & B as output.

Other experiences:

• I'm using a power Bank using 'alway-on mode' instead of a button battery, so power wasn't the problem as 'allObjects' sujected too.
  
• My previous design was running on Arduino, my mistake was transtlate that Arduino code to Espruino. Espruino needs other detailed commands to manage I2C (attached Arduino example)
  
  

Thanks,

1 Attachment

• I2C_ARDUINO_WRITE_A.ino