Using MAX3421 as USB Host

• Nov 22, 2007

• #1

M

m_kalburgi

Newbie level 3

Joined

Jun 15, 2006

Messages

3

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,314

If a USB Host wants to do a Bulk IN transfer with the USB device (e.g USB flash drive)
at full speed (12 mbps), but the USB devices' IN endpoint has max packet size as 512 bytes (i.e. the device supports high speed), then, can the USB device send the data to the Host with max packet size of 64 bytes ?
Because,according to the specifications, in Bulk transfer at Full speed the max packet size should be 64 bytes.

Thanks in advance.

-- Manish.

 

• Nov 28, 2007

• #2

funnynypd

Banned

Joined

May 9, 2007

Messages

436

Helped

48

Reputation

100

Reaction score

25

Trophy points

1,308

Location

USA & Canada

Activity points

0

usb bulk

Any one actually used the PIC for Bulk transfer? I saw couple of reference designs on Microchip web. Still not sure how good they are.

 

• Dec 11, 2007

• #3

M

m_kalburgi

Newbie level 3

Joined

Jun 15, 2006

Messages

3

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,314

usb bulk transfer size

Has anyone used MAX 3421 in Host mode ?

 

• Dec 17, 2007

• #4

L

linhtd

Newbie level 5

Joined

Dec 8, 2007

Messages

9

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,321

usb bulk packet

m_kalburgi said:

Has anyone used MAX 3421 in Host mode ?

Click to expand...

yes, because Max 3421 has supported Host Controller Operates at Full Speed or Low Speed

 

• Dec 18, 2007

• #5

M

m_kalburgi

Newbie level 3

Joined

Jun 15, 2006

Messages

3

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,314

bulk transfer usb

Actually I want to know if anybody is having the experience of using MAX3421 as USB Host ?

I am using MAX3421 as USB Host controller and trying to communicate with the USB flash drive.
I could enumerate the usb flash drive successfully but while communicating with the device using SCSI command I dont get any response.

 

• Jun 12, 2008

• #6

bobcat1

Advanced Member level 4

Joined

Jul 10, 2002

Messages

1,284

Helped

99

Reputation

198

Reaction score

34

Trophy points

1,328

Activity points

8,546

usb bulk mode

Hi

Can any one upload some code sample for the MAX3421

All the best

Bobi

 

• Jan 16, 2009

• #7

N

nevans06

Newbie level 6

Joined

Oct 10, 2007

Messages

13

Helped

1

Reputation

2

Reaction score

0

Trophy points

1,281

Activity points

1,353

usb bulk size

Hi,

Does anyone have code sample for the MAX3421. I can enumerate, but cant seem to get any further when acting as a host.

Thanks in advance!

 

• Jan 26, 2009

• #8

A

A.Anand Srinivasan

Advanced Member level 5

Joined

Oct 15, 2005

Messages

1,792

Helped

257

Reputation

514

Reaction score

39

Trophy points

1,328

Location

India

Activity points

10,678

usb full speed bulk transfer speed

It can definitely do so. Every device has different set of descriptors for full speed and high speed to do this...

 

• Feb 1, 2009

• #9

N

nevans06

Newbie level 6

Joined

Oct 10, 2007

Messages

13

Helped

1

Reputation

2

Reaction score

0

Trophy points

1,281

Activity points

1,353

max packet size for usb bulk-only transfer

Hi,

We have recently had great success in using the MAX3421 as a HOST, talking to digital cameras. Other devices achievable.

Email us if you require assistance.

Regards,
Circatek

 

• Mar 15, 2009

• #10

U

urefowei

Newbie level 3

Joined

Jan 6, 2009

Messages

3

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,294

usb bulk transfers

Hi, I read your post..
I need to drive 2 flash drives and transfer files from one to the other..
I am using MAX3421E, but I have little idea on descriptors especially when coding it..

Please share your code, I hope you are using a PIC uC for this application,
for us, we are using PIC18F4550 for this purpose..

Thank you!

 

• Mar 30, 2009

• #11

G

GetDeviceInfo

Advanced Member level 4

Joined

Mar 30, 2009

Messages

109

Helped

4

Reputation

8

Reaction score

6

Trophy points

1,298

Activity points

1,904

usb bulk profile

When you enumerate, have you assigned a device address and selected a configuration?

One you've done this, then you will switch away from your control endpoint and communicate on the bulk endpoint.

If you've successfully enumerated and send a valid command on the bulkendpoint, you should recieve an ack. Failing this I would go back to your enumeration process to make sure it's complete.

 

• Apr 6, 2009

• #12

G

GetDeviceInfo

Advanced Member level 4

Joined

Mar 30, 2009

Messages

109

Helped

4

Reputation

8

Reaction score

6

Trophy points

1,298

Activity points

1,904

usb bulk transfer speed

If a USB Host wants to do a Bulk IN transfer with the USB device (e.g USB flash drive)
at full speed (12 mbps), but the USB devices' IN endpoint has max packet size as 512 bytes (i.e. the device supports high speed), then, can the USB device send the data to the Host with max packet size of 64 bytes ?
Because,according to the specifications, in Bulk transfer at Full speed the max packet size should be 64 bytes

Click to expand...

Yes, your byte count register reports the bytes recieved.

With the Max3421 you need to manage the toggle register. This entails saving the toggle bits and resetting them whenever you move from one endpoint to another.

 

• Apr 13, 2009

• #13

B

binglingxiao

Newbie level 2

Joined

Jul 18, 2006

Messages

2

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,288

example of bulk transfer usb devices

It depends on whether your device can work at full speed.

 

• Apr 16, 2009

• #14

S

Storrie

Newbie level 1

Joined

Apr 16, 2009

Messages

1

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,284

12mbps pic usb bulk

Hi does anyone kown how to make a usb Midi devise but the IC that without bulk mode. It only have a HID class IC.

Thanks

 

• Jul 14, 2009

• #15

A

Ankita Agarwal

Newbie level 4

Joined

Jun 10, 2009

Messages

7

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,337

usb bulk stream

I have used PIC18F2550 with USB nad used generic USB.
I have created datalogger with it.
How can I make my endpoint for bulk transfer to get maximum speed. Till now i have used full speed.

 

• Jul 16, 2009

• #16

G

GetDeviceInfo

Advanced Member level 4

Joined

Mar 30, 2009

Messages

109

Helped

4

Reputation

8

Reaction score

6

Trophy points

1,298

Activity points

1,904

set usb bulk transfer buffer size

How can I make my endpoint for bulk transfer to get maximum speed. Till now i have used full speed.

Click to expand...

if your using full speed, then that's your constraint.

if your datalogging, you may want to consider using an isochronous pipe over a bulk pipe. The data will stream over the pipe as it becomes available. Typically with a bulk pipe you would buffer the data ('bulk' the data), then send it in chunk style. Bulk pipes are great for data that has some residency, where you can request it several times for whatever reason.

Isochronous data is data that is related to some specific time. Once that time passes, the old value is history. An audio stream, or datalogging stream is an example.

If you want to buffer your data, then send it bulk style, use the bulk pipe. But as you can guess, the first piece of data waits until the last piece is buffered before being sent

 

• Nov 26, 2010

• #17

J

jaycec

Member level 2

Joined

Jul 22, 2010

Messages

51

Helped

3

Reputation

6

Reaction score

3

Trophy points

1,288

Location

india

Activity points

1,611

Re: USB Bulk Transfer

me too in need of max3421e host code for pic can anyone tell me where can i get that one please.

 

• Mar 18, 2011

• #18

F

felis_CO

Junior Member level 1

Joined

Dec 3, 2007

Messages

16

Helped

2

Reputation

4

Reaction score

2

Trophy points

1,283

Activity points

1,342

Here's one -> Lightweight USB Host. Part 4 – The code. « Circuits@Home