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Discussion - Software / FT4222 use mode 2 and FT_OPEN_BY_LOCATION
« on: July 09, 2022, 01:38:08 am »
I connect four FT4222H chips to one ARM Linux board and use the mode 2 method. When I check the device connection using the libft4222 Library, it is recognized as normal. However, if I reboot the ARM Linux board or disconnect FT4222H and reconnect it, the LocId returned from FT_DEVICE_LIST_INFO_NODE changes every time, and I want to know if there is a way to fix LocId.
Because the equipment I am developing needs to control the SPI Slave Device according to the order of FT4222H connected to the USB port of the ARM Linux board, so I need fixed LocId information.
Or, I would like to know if there is a way to match LocId with Linux's /sys/bus/usb/devices/ information.
Because the equipment I am developing needs to control the SPI Slave Device according to the order of FT4222H connected to the USB port of the ARM Linux board, so I need fixed LocId information.
Or, I would like to know if there is a way to match LocId with Linux's /sys/bus/usb/devices/ information.