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Printer Class Driver Guide: Interfaces, Status Reporting and Requests

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Pradeep Patel
Pradeep Patel
Education
1 of 19
Printer Class Driver Pradeep Patel [email_address]
Printing a Page
Interfaces ,[object Object],[object Object]
Interfaces ,[object Object]
Status Reporting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Requests ,[object Object],[object Object]
Standard Requests A printer device supports all of the standard device requests described in Chapter 9, “USB Device Framework,” of the Universal Serial Bus Specification : • Clear Feature • Get Configuration • Get Descriptor • Get Interface • Get Status • Set Address • Set Configuration • Set Descriptor (optional) • Set Interface • Set Feature
Class-Specific Requests
GET_DEVICE_ID (bRequest = 0) ,[object Object],IEEE 1284 device ID string (including length in the first two bytes in big endian format). Data 0...n-1 Description Type Offset
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],GET_PORT_STATUS (bRequest = 1) Reserved Not Error Select Paper Empty Reserved 0 1 2 3 4 5 6 7
SOFT_RESET (bRequest = 2) ,[object Object],[object Object]
Standard Descriptors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Device Descriptors
Configuration Descriptors A printer has one default configuration descriptor. This descriptor has one interface, called the Data interface, which has one or two endpoints: Bulk OUT, and the optional Bulk IN.
Interface Descriptors All printers support a Data interface for transferring data to and/or from the device:
Endpoint Descriptors Printers support one or two endpoints. In addition to the Default endpoint, printers are required to support the Bulk OUT endpoint, or both the Bulk OUT and the Bulk IN endpoints.
Bulk IN Endpoint
Bulk OUT Endpoint
[object Object]

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Printer Class Driver Guide: Interfaces, Status Reporting and Requests

  • 1. Printer Class Driver Pradeep Patel [email_address]
  • 3.
  • 4.
  • 5.
  • 6.
  • 7. Standard Requests A printer device supports all of the standard device requests described in Chapter 9, “USB Device Framework,” of the Universal Serial Bus Specification : • Clear Feature • Get Configuration • Get Descriptor • Get Interface • Get Status • Set Address • Set Configuration • Set Descriptor (optional) • Set Interface • Set Feature
  • 9.
  • 10.
  • 11.
  • 12.
  • 14. Configuration Descriptors A printer has one default configuration descriptor. This descriptor has one interface, called the Data interface, which has one or two endpoints: Bulk OUT, and the optional Bulk IN.
  • 15. Interface Descriptors All printers support a Data interface for transferring data to and/or from the device:
  • 16. Endpoint Descriptors Printers support one or two endpoints. In addition to the Default endpoint, printers are required to support the Bulk OUT endpoint, or both the Bulk OUT and the Bulk IN endpoints.
  • 19.