Hi as anyone got any code / library for the mcp23008.
ve had no problems with any other i2c device , eeprom , clock , mcp230016 , i2c lcd display , but I cant can it working .
What is it that I`m missing ? I am leaving pins 6 , 7 , 8 floating ... a0 , a1 , a2 to gound so should be address 0x20 / 0x40 to the rest of the world.
Cmd address 0 , is the DDR , 0 means all outputs and cmd address 9 , is the GP0 port , so 255 should be all on.
I`m getting zero .
I know I`m getting power to the rails and SCL and SDA are right
Any help please .
It was the reset which must to set high