Support CY6C65215 and CY6C65215A

[runger1101001]

Support the dual channel devices. This is still a WIP.

This PR is to discuss the necessary changes to the scb_context, which are quite extensive.

Discussion on this topic also in PR #2

[multiplemonomials]

I would like to handle this case a little bit better in this function. I think what would make sense would be to add two DiscoveredDevice entries to the output when we see a dual channel device. Either that, or make DiscoveredDevice able to hold two different channels from one device.

[multiplemonomials]

I tried running cy_serial_cli scan with your branch, and I got:

╭─────────────────────────────── Traceback (most recent call last) ────────────────────────────────╮
│ /home/jamie/Mbed/cy_serial_bridge/src/cy_serial_bridge/cli.py:331 in scan                        │
│                                                                                                  │
│   328 │   Scan for candidate USB devices on the system                                           │
│   329 │   """                                                                                    │
│   330 │   scan_filter = None if scan_all else {(global_opt.vid, global_opt.pid)}                 │
│ ❱ 331 │   devices = context.list_devices(scan_filter)                                            │
│   332 │                                                                                          │
│   333 │   if len(devices) == 0:                                                                  │
│   334 │   │   if scan_all:                                                                       │
│                                                                                                  │
│ ╭─────────── locals ────────────╮                                                                │
│ │    scan_all = False           │                                                                │
│ │ scan_filter = {(1204, 57360)} │                                                                │
│ ╰───────────────────────────────╯                                                                │
│                                                                                                  │
│ /home/jamie/Mbed/cy_serial_bridge/src/cy_serial_bridge/cy_scb_context.py:206 in list_devices     │
│                                                                                                  │
│   203 │   │   │   │   │   │   │   scb_interface_settings = cfg[i][0]                             │
│   204 │   │   │   │   │   │   │   curr_cytype = CyType.UART_VENDOR                               │
│   205 │   │   │                                                                                  │
│ ❱ 206 │   │   │   if curr_cytype is None or mfg_interface_settings is None \                     │
│   207 │   │   │   │   or (scb_interface_settings is None and usb_cdc_interface_settings is Non   │
│   208 │   │   │   │   # TODO verbose output                                                      │
│   209 │   │   │   │   continue                                                                   │
│                                                                                                  │
│ ╭─────────────────────────────────────────── locals ───────────────────────────────────────────╮ │
│ │ cdc_data_interface_settings = None                                                           │ │
│ │                         cfg = <usb1.USBConfiguration object at 0x7d84d0df81a0>               │ │
│ │                         dev = <usb1.USBDevice object at 0x7d84d054c110>                      │ │
│ │                 device_list = []                                                             │ │
│ │                even_vid_pid = (1204, 57360)                                                  │ │
│ │                           i = 1                                                              │ │
│ │      mfg_interface_settings = <usb1.USBInterfaceSetting object at 0x7d84d054c290>            │ │
│ │                 odd_vid_pid = (1204, 57361)                                                  │ │
│ │      scb_interface_settings = None                                                           │ │
│ │                        self = <cy_serial_bridge.cy_scb_context.CyScbContext object at        │ │
│ │                               0x7d84d05018b0>                                                │ │
│ │                        type = <CyType.MFG: 5>                                                │ │
│ │  usb_cdc_interface_settings = None                                                           │ │
│ │                    vid_pids = {(1204, 57360)}                                                │ │
│ ╰──────────────────────────────────────────────────────────────────────────────────────────────╯ │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
UnboundLocalError: cannot access local variable 'curr_cytype' where it is not associated with a value

[runger1101001]

Hmmm - I'll look into this. I have worked on it in the last few days, and it's working on my side. But I have more changes I've done, so probably I've fixed this issue already.

[multiplemonomials]

Hey! Finally had time to work on this!

I set up a new test suite in the code to test device discovery. This lets you define what the USB descriptors for a device look like, and then test scanning for those descriptors. If you can add entries in there based on your dual channel device (ideally for every combination of interfaces, e.g. UART+UART, UART+I2C, I2C+SPI, etc), then we can test the device discovery code waaay more easily.

To generate the USB descriptor in the test, I am getting data from this script I wrote that dumps all the USB descriptors on the machine. But you could also use something like NirSoft USBTreeView on Windows.

P.S. do you have a Discord account? I can add you to the Mbed CE discord server and we can discuss this more!

P.P.S. I got the tracking email for your package but it still hasn't arrived yet sadly.