Ayone have a Driver/Object for a MicroChip MCP23S17 SPI 16Bit I/O Expander?
Jim Fouch
Posts: 395
I just got a bunch of these and am going to write a driver for them. I checked the OBEX and didn't see anything specific to the MCP23S17.
I chose this chip because of the fast SPI interface. It says 10Mhz so I/O R/W to I/O can be·pretty quick. It's also pretty cheap in·~25 qty @ ~$1/ea from Digikey.
I'm thinking of having an assembly object that can drive several of these·chips. You can have 8 ·of these on one SPI bus, so that's an extra 128 pins for the cost of only 3 on the prop.
Any thoughts?
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jim Fouch
FOUCH SOFTWARE
I chose this chip because of the fast SPI interface. It says 10Mhz so I/O R/W to I/O can be·pretty quick. It's also pretty cheap in·~25 qty @ ~$1/ea from Digikey.
I'm thinking of having an assembly object that can drive several of these·chips. You can have 8 ·of these on one SPI bus, so that's an extra 128 pins for the cost of only 3 on the prop.
Any thoughts?
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jim Fouch
FOUCH SOFTWARE