Asbelos
commented
10 months ago Although this does not exist at present, I think it may be possible although it would have to play nicely with the other non-blocking i2c code in dccex and not use the Wire library. The existing i2c code has a per-address queueing mechanism so having lots of addresses could cause ram problems. Some of our larger layouts would also run out of addresses and have to use multiplexers.On 6 Jan 2024 18:08, Architect @.***> wrote: Is it possible to have EXRAIL send out an I2C command to a slave device? Not the Ex-ioexpander. Why? I created an attiny85 with an L293D motor driver chip to control two Kato turnouts. I plan to have these placed close to the turnouts, then run I2C back to the DCC-EX command center. I have a large layout and felt this was the best way to reduce wiring. I can just run a long I2C bus and tap into it at each turnout. I will design a PCBWay board and have them build the tiny boards. For this to work, I need EXRAIL to know the I2C address for the turnout and a standard I2C message to go out. Thanks for the information.
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Is it possible to have EXRAIL send out an I2C command to a slave device? Not the Ex-ioexpander.
Why?
I created an attiny85 with an L293D motor driver chip to control two Kato turnouts. I plan to have these placed close to the turnouts, then run I2C back to the DCC-EX command center. I have a large layout and felt this was the best way to reduce wiring. I can just run a long I2C bus and tap into it at each turnout. I will design a PCBWay board and have them build the tiny boards.
For this to work, I need EXRAIL to know the I2C address for the turnout and a standard I2C message to go out.
Thanks for the information.