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<label product_type>PRODUCT_TYPE</label> TQMa7x - PTXdist Linux BSP documentation
Known Issues
U-Boot BSP Rev.0105
U-Boot
USB devices cannot be recognized after resetting the USB Bus | |
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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 | TDB |
Linux BSP Rev.0101
U-Boot and Linux
'USB does not work with TQMa7S with MBa7x | |
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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 |
MBa57x
RS485
RS485 bus block in half-duplex mode | |
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Affects | RS485 via UARTx on MBa57xx Revsion 01xx |
Issue | During AM57xx reset the UARTx.CTS# pin is low by default (CPU internal pull down) |
Effect | Using the AM57xx RS485 circuitry in a half-duplex slave device or half-duplex multi-master environment may block the RS485 bus during AM57xx 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 This behaviour will be fixed with MBa57xx REV.02xx |