2010-01-21 01:56:01     how about the max Speed of BF548 OTG as mass storage Peripheral with sd card ?

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2010-01-21 01:56:01     how about the max Speed of BF548 OTG as mass storage Peripheral with sd card ?

kai yang (CHINA)

Message: 84876   

 

I find my USB Mass storage  with Transfer Speed with sd card  is so low:

 

ezkit548 run uClinux as usb devices,PC as USB host。I tested the speed follow:

 

uClinux      SD Card sandisk 2G:      ATA/ATAPI:      Mem disk 8M:

write      0.050553 M/s      0.562886 M/s      1.400000 M/s

 

but on VDSP Device driver

 

VDSP      sd卡 sandisk 2G:     harddisk:     mem disk 8M:

write     0.153846 M/s     0.588235 M/s     3.006873 M/s

 

File system: Fat 32

 

I want know how  the detail /max  speed USB mass transfers on uClinux over sd card ?

 

or is there preference ?

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2010-01-21 03:16:27     Re: how about the max Speed of BF548 OTG as mass storage Peripheral with sd card ?

Sonic Zhang (CHINA)

Message: 84882   

 

  docs.blackfin.uclinux.org/doku.php?id=linux-kernel:device_driver_performance

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2010-01-21 19:55:02     Re: how about the max Speed of BF548 OTG as mass storage Peripheral with sd card ?

kai yang (CHINA)

Message: 84946   

 

thank you

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