![]() The test application checks that the received packet always has the ID of the previous packet + 1. Each packet has a unique, consecutive ID. The device ( USB high-speed) sends out data continuously in 512 bytes packets. ![]() We have analysed this using a hardware USB analyser and a test program which The only workaround is to read in small chunks. Sometimes packets seems to disappear inside the Windows 10 USB stack. Windows 10 comes with a re-designed driver for CDC-ACM.Īt the time of writing (June 2019) Windows 10 has an issue with large IN CDC transfers. Program can be used to access the device. ![]() On macOS no drivers are needed, the device should show up as inf file for the CDC-ACM device must be installed on these older systems. On Windows 8.1 and below the "usbser" driver is not automaticallyĪssigned to the CDC-ACM device. On Linux no drivers are needed, the device should show up as
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