Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
446
For More details about VID/PID for End Product/Systems, please refer to the Vendor ID form available from the
USB Implementers Forum:
USB Implementers Forum:
http://www.usb.org/developers/vendor/VID_Only_Form_withCCAuth_102407b.pdf
"Unauthorized use of assigned or unassigned USB Vendor ID Numbers and associated Product ID Numbers is
strictly prohibited."
strictly prohibited."
Atmel provides an INF example to see the device as a new serial port and also provides another custom driver
used by the SAM-BA application: atm6124.sys. Refer to the document “USB Basic Application”,
used by the SAM-BA application: atm6124.sys. Refer to the document “USB Basic Application”,
literature number
6123
, for more details.
24.6.3.1 Enumeration Process
The USB protocol is a master/slave protocol. This is the host that starts the enumeration sending requests to the
device through the control endpoint. The device handles standard requests as defined in the USB Specification.
device through the control endpoint. The device handles standard requests as defined in the USB Specification.
The device also handles some class requests defined in the CDC class.
Unhandled requests are STALLed.
24.6.3.2 Communication Endpoints
There are two communication endpoints and endpoint 0 is used for the enumeration process. Endpoint 1 is a 64-
byte Bulk OUT endpoint and endpoint 2 is a 64-byte Bulk IN endpoint. SAM-BA Boot commands are sent by the
host through endpoint 1. If required, the message is split by the host into several data payloads by the host driver.
byte Bulk OUT endpoint and endpoint 2 is a 64-byte Bulk IN endpoint. SAM-BA Boot commands are sent by the
host through endpoint 1. If required, the message is split by the host into several data payloads by the host driver.
If the command requires a response, the host can send IN transactions to pick up the response.
Table 24-3.
Handled Standard Requests
Request
Definition
GET_DESCRIPTOR
Returns the current device configuration value.
SET_ADDRESS
Sets the device address for all future device access.
SET_CONFIGURATION
Sets the device configuration.
GET_CONFIGURATION
Returns the current device configuration value.
GET_STATUS
Returns status for the specified recipient.
SET_FEATURE
Set or Enable a specific feature.
CLEAR_FEATURE
Clear or Disable a specific feature.
Table 24-4.
Handled Class Requests
Request
Definition
SET_LINE_CODING
Configures DTE rate, stop bits, parity and number of
character bits.
character bits.
GET_LINE_CODING
Requests current DTE rate, stop bits, parity and number
of character bits.
of character bits.
SET_CONTROL_LINE_STATE
RS-232 signal used to tell the DCE device the DTE
device is now present.
device is now present.