Cypress Semiconductor SL811HS Manual de usuario descargar pdf (Pagina 25)

Cypress Semiconductor Corporation

SL811HS and SL811HST: Application Notes

and specifications contained in this document are subject to change without

notice.

Date: 07/26/01

Revision: 1.21

Page: 25

4.1.9 Single OUT Packet

Example of a single OUT Packet: The OUT Packet transaction consists of an OUT PID

containing device USB address and Endpoint. It is followed by a DATA token with data

payload. The program sample shows a PID OUT token followed by a Data0 packet. For

continuous OUT packets, Data tokens are required to toggle between Data0 and Data1, and so

on.

Program Sample 9: Single OUT Packet

short addr = 3; // address 3 short addr = 3; // address 3

... ...

SL11Write(EP0Address, (BYTE)cMemStart); // DATA0 SL11Write(EP0Address, (BYTE)cMemStart); // DATA0

// PID_IN an // PID_IN and endpoint 2d endpoint 2

SL11Write(EP0Status, ((PID_OUT & 0xff)<<4) | 2); // PID + ep SL11Write(EP0Status, ((PID_OUT & 0xff)<<4) | 2); // PID + ep

SL11Write(EP0Counter, addr); SL11Write(EP0Counter, addr);

SL11Write(EP0XferLen,payload); // payload SL11Write(EP0XferLen,payload); // payload

SL11Write(EP0Control,DATA0_WR); SL11Write(EP0Control,DATA0_WR);

USB Trace 3: OUT Packet

4.1.10 Short Data Packet

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 42 43

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Cypress Semiconductor SL811HS Manual de usuario Pagina 25