CDC ACM

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'''USB CDC ACM''' (Universal Serial Bus - Class Definition for Communication Devices - Abstract Control Model) supports serial communication (including AT-commands) over USB.
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[[USB]] CDC (Communications Device Class) ACM (Abstract Control Model) is a vendor-independent publicly documented protocol that can be used for emulating serial ports over USB.
  
 
CDC ACM is used to access the U-boot bootloader prompt over USB (see: [[U-boot#Using_usbtty_from_Linux]]).
 
CDC ACM is used to access the U-boot bootloader prompt over USB (see: [[U-boot#Using_usbtty_from_Linux]]).
  
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== Hardware specifics ==
  
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=== Specification ===
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=== Neo1973 and CDC ACM ===
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http://www.usb.org/developers/devclass_docs/usbcdc11.pdf (3.6.2.1)
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[[Category:Technical]]
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The Neo1973 [[u-boot]] boot loader contains support for obtaining the boot loader prompt over USB CDC ACM.
  
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The Openmoko kernel also contains CDC ACM device support, contained in the '''g_serial.ko''' kernel module.
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=== Host PC and CDC ACM ===
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==== Linux ====
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Linux has a generic CDC ACM host-side implementation in the kernel module '''cdc_acm.ko'''
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On 2.6.25 this is at "Device Drivers -> USB support (USB_SUPPORT [=y]) -> Support for Host-side USB (USB [=m]) -> USB Modem (CDC ACM) support (USB_ACM)"
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==== Windows ====
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FIXME
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==== MacOS X ====
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See the [[MacOS_X#USB_Serial|USB Serial section in the MacOS X article]].
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=== Specification ===
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http://www.usb.org/developers/devclass_docs/usbcdc11.pdf (3.6.2.1)
  
 
See http://wiki.openmoko.org/wiki/USB_CDC_ACM from more information
 
See http://wiki.openmoko.org/wiki/USB_CDC_ACM from more information
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[[Category:Protocol]]
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[[Category:USB]]

Latest revision as of 11:49, 31 March 2010

USB CDC (Communications Device Class) ACM (Abstract Control Model) is a vendor-independent publicly documented protocol that can be used for emulating serial ports over USB.

CDC ACM is used to access the U-boot bootloader prompt over USB (see: U-boot#Using_usbtty_from_Linux).

Contents

[edit] Hardware specifics

[edit] Neo1973 and CDC ACM

The Neo1973 u-boot boot loader contains support for obtaining the boot loader prompt over USB CDC ACM.

The Openmoko kernel also contains CDC ACM device support, contained in the g_serial.ko kernel module.

[edit] Host PC and CDC ACM

[edit] Linux

Linux has a generic CDC ACM host-side implementation in the kernel module cdc_acm.ko

On 2.6.25 this is at "Device Drivers -> USB support (USB_SUPPORT [=y]) -> Support for Host-side USB (USB [=m]) -> USB Modem (CDC ACM) support (USB_ACM)"

[edit] Windows

FIXME

[edit] MacOS X

See the USB Serial section in the MacOS X article.


[edit] Specification

http://www.usb.org/developers/devclass_docs/usbcdc11.pdf (3.6.2.1)

See http://wiki.openmoko.org/wiki/USB_CDC_ACM from more information

Retrieved from "http://openmoko.org/index.php?title=CDC_ACM&oldid=80541"
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USB CDC ACM (Universal Serial Bus - Class Definition for Communication Devices - Abstract Control Model) supports serial communication (including AT-commands) over USB.

CDC ACM is used to access the U-boot bootloader prompt over USB (see: U-boot#Using_usbtty_from_Linux).


Specification

http://www.usb.org/developers/devclass_docs/usbcdc11.pdf (3.6.2.1)


See http://wiki.openmoko.org/wiki/USB_CDC_ACM from more information