Buttons and led's

4 Buttons / 4 Led's

The 4 buttons / 4 led's are supported on the GPIO pins. The mapping is as following:

• • GPIO0 -> cmd0

  • GPIO1 -> cmd1

  • GPIO2 -> cmd2

  • GPIO3 -> cmd3

The GPIO pins are active low (connecting the other side of the button to ground).

The status led's are mapped as following:

• • GPIO 6 -> led0

  • GPIO 7 -> led1

  • GPIO10 -> led2

  • GPIO18 -> led3

For the function of the other pins, see here.

8 Buttons / 8 Led's

This is implemented using a MCP23017. INTA must be connected to GPIO7, pin 12. See also here.

The mapping is as following:

• • GPA0 -> cmd0

  • GPA1 -> cmd1

  • GPA2 -> cmd2

  • GPA3 -> cmd3

  • GPA4 -> cmd4

  • GPA5 -> cmd5

  • GPA6 -> cmd6

  • GPA7 -> cmd7

The GPIO pins are active low (connecting the other side of the button to ground).

The status led's are mapped as following:

• • GPB0 -> led0

  • GPB1 -> led1

  • GPB2 -> led2

  • GPB3 -> led3

  • GPB4 -> led4

  • GPB5 -> led5

  • GPB6 -> led6

  • GPB7 -> led7