See if your jumper echoes to your terminal emulator. If there is data and you are really, really sure that everything is correct with your serial connection, then most probably your board suffers from errata 8. It turned out that pin 5 ground was miswired. Instruments X-Loader 1.
|Country:||Saint Kitts and Nevis|
|Published (Last):||12 September 2012|
|PDF File Size:||12.59 Mb|
|ePub File Size:||11.48 Mb|
|Price:||Free* [*Free Regsitration Required]|
It, along with the PHY chip - support charging without the intervention of the SoC when the system is charging from a completely dead battery. It also features reverse boost mode - which enables power to be supplied to a USB device connected to the N This rights to this part have been bought by ST-Ericson and some information is available in a brief marketing sheet.
There is no published datasheet for this chip. It may be available under another name. It does the very lowest level USB hardware protocol. It also has a connection to VBUS, via a 1k resistor, to do certain probing. The bqa Battery charger. It handles with the PHY chip charging from dead. It also implements boost mode, to enable powering things through the USB socket. Of course it detects when external VBUS is applied. Though TWL has a function similar to PHY chip as well, the original design using this function had to change as early chip revisions had problems with charger detection so the rumour.
Driver sourecode is full of cruft from that original design. Kernel driver. Host mode works, see this thread Mohammad started on talk. The basic functionality seems to work fine. A user friendly implementation that makes it easy to use host mode needs a lot more than this, e.
Initially it was claimed that ID is not connected externally, and that this made USB host mode impossible. Other PHY chips e. There is apparently no way to tell MUSB-core directly to switch to hostmode in a natural way. Or we can spoof this command rsp the resulting telegram The current understanding by several people who are working on USB host mode is: The USB port can supply power - at least mA as demonstrated here: .
This is plenty for many devices - mice and keyboards.
N900 Hardware USB
关于linux regulator dirver(2) OMAP PMIC regulator: