Hi, Im working on adding Link Instruments MSO-19 support to sigrok, and im struggling on how to keep the code safe for multiple device instances.
The MSO-19 uses a usb-serial bridge, and except for hardware identification, all the communication is done in the serial layer. The hardware identification (usb layer) is needed to get hardware type and revision, and to apply some "quirks" to the device calibration. The original windows software doesn't support multiple devices at all. And would fail usb<->serial mapping if the user had another usb device with the same kind of usb-serial bridge as the MSO-19. On Linux I can assert proper usb<->serial mapping using libudev, so, I can make it multiple-instance safe easily. I don't know how to keep proper usb<->serial mapping on other platforms. Should I add libudev as a dependency on linux builds? Should I drop libudev in favor of libusb and not support multiple devices at all? Thanks! -- Daniel Ribeiro
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