2010-03-12 23:45:53     can't get USB power supply from BF526EZBRD

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2010-03-12 23:45:53     can't get USB power supply from BF526EZBRD

Zhi Qiang Zhang (CHINA)

Message: 87147   

 

I used the this image(  blackfin.uclinux.org/gf/download/frsrelease/473/7287/uImage-bf526-ezbrd-2009R1.1-RC4), it seems the USB HOST driver loaded correctly,

 

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

musb_hdrc: version 6.0, musb-dma, host, debug=0

musb_hdrc: USB Host mode controller at ffc03800 using DMA, IRQ 59

musb_hdrc musb_hdrc.0: MUSB HDRC host driver

musb_hdrc musb_hdrc.0: new USB bus registered, assigned bus number 1

usb usb1: configuration #1 chosen from 1 choice

hub 1-0:1.0: USB hub found

dma_alloc_init: dma_page @ 0x03e93000 - 256 pages at 0x03f00000

hub 1-0:1.0: 1 port detected

 

 

 

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

i2c-bfin-twi i2c-bfin-twi.0: Blackfin BF5xx on-chip I2C TWI Contoller, regs_base@ffc01400

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

usbcore: registered new interface driver usbhid

usbhid: v2.6:USB HID core driver

TCP cubic registered

 

I plug an USB disk, but there is no 5V power, I haved turn SW20.2, SW20.5 OFF and SW20.6 ON, is there any setting I have to set?

 

 

 

Regards,

 

ZhangZQ

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2010-03-12 23:55:27     Re: can't get USB power supply from BF526EZBRD

Zhi Qiang Zhang (CHINA)

Message: 87148   

 

forget to say, I am using an USB converter

 

the left one, is it ok?

 

Regards,

 

ZhangZQ

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2010-03-14 20:07:44     Re: can't get USB power supply from BF526EZBRD

Ian Jeffray (UNITED KINGDOM)

Message: 87190   

 

I don't think you're using the left one - that's not a mini A or B connector there.

 

What you need is a mini-A to A converter.  Be careful that it's mini-A not mini-B, or you'll experience the problem you're seeing.  Mini-A connectors have the 5th pin pulled to ground to indicate to the host controller that it should change to host mode rather than device mode.  My guess is you've not got a mini-A to A converter plugged in.    A mini-B will fit in a mini-AB OTG socket of course.   Note the physical differences for identification:

 

  upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Types-usb.svg/300px-Types-usb.svg.png

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2010-03-14 22:09:42     Re: can't get USB power supply from BF526EZBRD

Zhi Qiang Zhang (CHINA)

Message: 87191   

 

The only difference between Mini-A and Mini-B is the 5th pin, right? Let me pullthe 5th pin of my cable to ground to try.

 

thank you very much!

 

 

 

Regards,

 

ZhangZQ

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2010-03-15 00:53:13     Re: can't get USB power supply from BF526EZBRD

Zhi Qiang Zhang (CHINA)

Message: 87193   

 

It needs to pull the 4th pin to ground not the 5th pin, right? I tried to pull 4th and 5th to ground, BF526 still can't detect my USB DISK.

 

Regards,

 

ZhangZQ

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2010-03-15 12:33:05     Re: can't get USB power supply from BF526EZBRD

Ian Jeffray (UNITED KINGDOM)

Message: 87210   

 

When I said "5th pin" I did not mean "Pin 5".  The "extra" pin on a mini USB connector is for role detection.  Get the right cable and don't just pull random pins to ground.

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2010-03-15 19:50:44     Re: can't get USB power supply from BF526EZBRD

Zhi Qiang Zhang (CHINA)

Message: 87222   

 

I checked the 4th pin is the ID line, I made 4th and 5th pin in connection, but same problem. And I found no Mini-A to A cable in the market.

 

Regards,

 

ZhangZQ

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