This pull request add Alex interface over i2c address 0x21 and generic filters interface over i2c address 0x20 to rpi-4.
If radioberry discover i2c device on 0x21 address it will use Alex interface protocol.
If radioberry discover i2c device on 0x20 address it will use the Generic Filters interface that i'm developing.
I've put the code on a separate file: filters.h to keep to other code files clean and shorter.
This pull request add Alex interface over i2c address 0x21 and generic filters interface over i2c address 0x20 to rpi-4.
If radioberry discover i2c device on 0x21 address it will use Alex interface protocol. If radioberry discover i2c device on 0x20 address it will use the Generic Filters interface that i'm developing.
I've put the code on a separate file: filters.h to keep to other code files clean and shorter.
73 VA2SAJ