Very new here. I’m trying to control my new MCP23017. I am able to get basic communications with the hardware (com port) but I need specifics on how to control each driver on the board. Bit frustrated as I have read a lot of material and I am still lost. Any help would be appreciated. Thanks,
What do you have the MCP23017 board connected to? Arduino, Pi, NCD I2C controller, etc.
Hi Travis, thanks for your response, I am using the USB Interface Adapter for NCD IoT Devices Virtual COM Port FT230XS connected to my Windows PC. I am developing in VB.net and using the read/write functions in NCDComponent.dll. I can get a response byte (170) from the USB interface adapter with this code. Thanks for any help you can provide.
Dim CommandString As String = "AA,02,FE,21,CB" Dim CommandBytes(CommandString.Split(",").Length - 1) As Byte For I As Integer = 0 To CommandBytes.Length - 1 CommandBytes(I) = Convert.ToByte(CommandString.Split(",")(I), 16) Next NcdComponent1.WriteBytes(CommandBytes) MsgBox(NcdComponent1.ReadByte.ToString)
You might try looking at the source code for Alpha Station (https://ncd.io/alpha), there are samples for the MCP23017 that are working (so you can test the UI first), then dig into the code further.
Hope this helps.
Thanks Ryan, I am up and running. I just continued further in the https://ncd.io/serial-to-i2c-conversion/ documentation.
Great, I forgot about that! Let me know if you need anything else.