TS-7970 USB Host: Difference between revisions
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The i.MX6 provides 1 USB Host with supporting USB 2.0 (480Mbit/s). The TS-7970 includes a USB Hub expanding this to 4 USB host ports. | The i.MX6 provides 1 USB Host with supporting USB 2.0 (480Mbit/s). The TS-7970 includes a USB Hub expanding this to 4 USB host ports. | ||
Typically USB is interfaced with by using standard Linux drivers, but low level USB communication is possible using [ | Typically USB is interfaced with by using standard Linux drivers, but low level USB communication is possible using [https://libusb.info/ libusb]. | ||
The TS-7970 USB 5V rail can be toggled on/off through a GPIO. This can be used to save power, or to reset USB devices that get stuck in a bad state. | The TS-7970 USB 5V rail can be toggled on/off through a GPIO. This can be used to save power, or to reset USB devices that get stuck in a bad state. | ||
Latest revision as of 20:29, 14 January 2021
The i.MX6 provides 1 USB Host with supporting USB 2.0 (480Mbit/s). The TS-7970 includes a USB Hub expanding this to 4 USB host ports.
Typically USB is interfaced with by using standard Linux drivers, but low level USB communication is possible using libusb.
The TS-7970 USB 5V rail can be toggled on/off through a GPIO. This can be used to save power, or to reset USB devices that get stuck in a bad state.
# Power disabled
echo 1 > /sys/class/leds/en-usb-5v/brightness
sleep 2 # let any devices reset
# Enable power
echo 0 > /sys/class/leds/en-usb-5v/brightness
| Note: | The USB OTG which can act as a host does not always use the same controllable 5V supply. Refer to the schematic's EN_USB_5V/USB_5V for more information on this control. |