EZ-USB2100系列单片机资料

;-------------------------------------------------------------- ; ezbulk.A51 6-17-98 LTH ; ; A Simple bulk transfer. Updated and corrected version of the ; example code on page 81 of the EZ-USB TRM v1.0. Use this to study bulk transfers ; between the EZ-USB Development Board and the Anchor Control Panel. ; ; 1. Fills the EP2IN buffer with a decrementing count from 64 to 1. ; 2. Maintains counts of number of IN and OUT transfers to EP2. ; 3. Does nothing with the data received over EP2OUT. ; 4. Updates the first two bytes of the EP2IN buffer with the number ; of EP2IN transfers (byte 0) and the number of OUT transfers (byte 1). ; ; To exercise with the Anchor control panel: ; 1. Download the code, either from the Keil environment or by clicking the ; 'Download' button and selecting ezbulk.hex. ; 2. Set Interface 0, alternate setting 1. This establishes the EP2 endpoints ; with MaxPacketSizes of 64. Press "Get Pipes" to update. ; 3. Select Endpoint 2 IN in the Bulk Transfer button bar. ; 4. Click the Blk Trans button. You should see the 64 bytes decrementing from ; 64 to 1. ; 5. Click Blk Trans button again to perform another EP2IN transfer. The pattern ; should now be the same except for byte 0, which indicates 1 IN transfer has ; previously happened. Each click of BlkTrans button with EP2IN selected transfers ; another 64 bytes with the first byte incrementing. ; 6. Select Endpoint 2 OUT in the Bulk Transfer button bar. ; 7. Click BlkTrans. This sends 64 bytes to EP2OUT. The data is ignored. ; 8. Select Endpoint 2 IN, click BlkTrans. The second byte should now be 1, indicating ; that one EP2OUT transfer has previously happened. ; ; This code polls the endpoint busy bits. A more advanced example would use the vectored ; interrupts. ;--------------------------------------------------------------