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2010-05-08
, 04:40
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@ SOL 3
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#792
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2010-05-08
, 04:50
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#793
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2010-05-08
, 05:11
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Joined on Dec 2009
@ California
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#794
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Nevertheless your results for ENUM etc are really exciting, could you try and use a selfpowered USB hub for your tests? I'd expect it should reply properly to any data sent from N900, even when the VBUS from N900 is as low as 3.5V
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2010-05-08
, 05:54
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@ SOL 3
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#795
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What do you think - Is a self powered disk suitable for this?
Or, alternatively - is any selfpowered USB hub sutable (I need to buy one)?
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2010-05-08
, 06:51
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@ California
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#796
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Disk -> probably, though you should check (isolate or cut the V+ VBUS wire (red)) and connect to any normal working host.
selfpowered hub, quite sure will work. Most don't care about upstream VBUS aiui. Speedevil should know better details.
On a different topic: To me it seems like we are using the http://mxr.maemo.org/fremantle/sourc...usb/omap2430.c for N900?
In there are a number of *very* interesting details, e.g
209 #ifdef CONFIG_USB_MUSB_HDRC_HCD
210 case MUSB_HOST:
are our kernels compiled with CONFIG_USB_MUSB_HDRC_HCD ?
and
155 static void omap_set_vbus(struct musb *musb, int is_on)
156 {
157 u8 devctl;
158 /* HDRC controls CPEN, but beware current surges during device
This clearly refers to CPEN ChargePumpENable of any PHY chip. Won't work, as we need to talk to bme instead
even
151 static void omap_vbus_power(struct musb *musb, int is_on, int sleeping)
152 {
153 }
...
272 if (is_host_enabled(musb))
273 musb->board_set_vbus = omap_set_vbus;
the function itself is empty/nullfunct (152,153)
also interesting the lines
418 /* Recover OTG control */
419 r = musb_ulpi_readb(musb->mregs, ISP1704_OTG_CTRL);
...426
containing ISP1704 references. See e.g. http://mxr.maemo.org/fremantle/ident?i=ISP1704_OTG_CTRL
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2010-05-08
, 10:03
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@ Fife, Scotland.
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#797
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2010-05-08
, 14:11
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@ SOL 3
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#798
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Nokia-N900-02-8:/home/user/i2c# stop bme; sleep 3; ./i2cset -y -m 0x07 2 0x6b 0x01 0x05; while true; do sleep 28; ./i2cset -y -m 0x80 2 0x6b 0x00 0x80; done
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2010-05-08
, 14:34
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@ Cape town
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#799
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2010-05-08
, 14:45
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@ Barcelona
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#800
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Tags |
awesomeness in the works, boulevard of broken deals, host, i am the dealbreaker, inspector gadget lies, mobidapter is a scam, nokia fanbois, otg, over 9000, usb, usbcontrol |
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Are you sure that host w/out high-performance charge capability requires VBUS=5V? The reason for my question is simple - the ARM CPU USB DEVCTL has a couple of voltage levels and so called "AValid" or A-state Valid is right about 3.5V.