Known Issues
U-Boot BSP Rev.0105
U-Boot
| USB devices cannot be recognized after resetting the USB Bus | |
|---|---|
| Affects | USB highspeed Host |
| Issue | USB devices cannot be recognized after using command usb reset or usb stop |
| Effect | USB devices cannot be recognized after using command usb reset or usb stop |
| Solution / Workaround | |
Linux BSP Rev.0101
U-Boot and Linux
| USB does not work with TQMa7S with MBa7x | |
|---|---|
| Affects | USB highspeed Host |
| Issue | USB highspeed Host does not work with TQMa7S |
| Effect | USB highspeed Host does not work with TQMa7S |
| Solution / Workaround | Will be fixed in the next BSP revision |
MBa7x
RS485
| RS485 bus block in half-duplex mode | |
|---|---|
| Affects | RS485 via UARTx |
| Issue | During i.MX7 reset the UARTx.CTS# pin is low by default (CPU internal pull down) |
| Effect | Using the MBa7x RS485 circuitry in a half-duplex slave device or half-duplex multi-master environment may block the RS485 bus during i.MX7 reset. The bus is released as soon as the UARTx.CTS# pin is properly configured by software (e.g. U-Boot, Linux, etc.) |
| Solution / Workaround | Add a 10k pull up to the UARTx.CTS# signal on carrier board |
Disclaimer
TQ-Systems GmbH provides the Board Support Packages (BSP) free of charge. The software included in the shipment has been configured individually for the starter kits. The software is only intended to evaluate the module. The use of the Board Support Packages (BSP) is only allowed within the scope of functionality described by TQ-Systems GmbH. TQ-Systems GmbH does not accept any liability for all further changes of the Board Support Package and for any damage resulting from its use.
TQ-Systems GmbH provides the Board Support Packages (BSP) free of charge. The software included in the shipment has been configured individually for the starter kits. The software is only intended to evaluate the module. The use of the Board Support Packages (BSP) is only allowed within the scope of functionality described by TQ-Systems GmbH. TQ-Systems GmbH does not accept any liability for all further changes of the Board Support Package and for any damage resulting from its use.