Write to HID with Chip Selection with .NET Console App

Question

Hi I am writing a simple console app that needs to write bytes to MCP2210 USB to SPI Master I found this library over here, seems to do good job with connecting the device and reading the metadata.

I am writing message to the board as below

 public static byte[] Talk()
        {
            var device = DeviceList.Local.GetHidDevices(1240, 222).FirstOrDefault();
            if (device == null)
            {
                Console.WriteLine($"Could not find a device with Vendor Id:1240, Product Id:222 ");
                return null;
            }
var reportDescriptor = device.GetReportDescriptor();
            foreach (var deviceItem in reportDescriptor.DeviceItems)
            {
Console.WriteLine("Opening device for 20 seconds...");
                if (!device.TryOpen(out var hidStream))
                {
                        Console.WriteLine("Failed to open device.");
                        continue;
                }

                    Console.WriteLine("Opened device.");
                    hidStream.ReadTimeout = Timeout.Infinite;
                    hidStream.Write(new byte[3] {60, 00, 00});
           }  

Not sure If I am writing it correctly. While writing I need to do a chip selection as displayed in this other terminal

Any help is greatly appreciated

Here is the MC I am using https://www.microchip.com/wwwproducts/en/MCP2210

Regression

Answer 1

I do not see a closing of your stream. This may cause your data to not even being sent (at least not in time).

Consider using blocks with streams. But with out parameters not possible.

Bowlder

that's not the issue. My question is how do I select chip for GPIOs – Regression