readme.txt

来自「A Simple bulk transfer. Example code of 」· 文本 代码 · 共 34 行

;--------------------------------------------------------------
; 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.
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