A51 MACRO ASSEMBLER
SPEAKER
01/28/2001 14:47:27 PAGE
1
MACRO ASSEMBLER A51 V6.10
OBJECT MODULE PLACED IN .\SPEAKER.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE .\SPEAKER.A51 REGISTERBANK(0) SET(SMALL) DEBUG EP
LOC
OBJ
LINE
0040
0088
0089
008A
008C
00A8
00E8
0091
00D8
0092
0086
7FE1
7FF0
7F71
7F60
7FE8
7FD4
7FB4
7F00
7EC0
7E80
7FB5
7FC5
7FB7
7FAC
7FA9
7FAD
7FAA
7FAE
+1
+1
+1
+1
+1
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1
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SOURCE
NAME
Speaker
;
; Copyright (C) 2001, Intel Corporation
; All rights reserved.
; Permission is hereby granted to merge this program code with other program
; material to create a derivative work. This derivative work may be distributed
; in compiled object form only. Any other publication of this program, in any form,
; without the explicit permission of the copyright holder is prohibited.
;
; Send questions and comments to John.Hyde@intel.com
;
;
; Derived from BAL Version 3.5
;
; This is a simple 8-bit mono speaker example (suitable for speech and sound effects).
; It is an Audio Class device with a single (16KHz) sampling frequency
; The hardware includes a USBSIMM, latching DAC and an op amp
;
; This version works dScope monSIO0.hex (uses Serial Port 0, loads at 1200H)
;
EP0Size EQU
64
; For EZ-USB
;
;$include (Declare.A51)
; This module declares the variables and constants used in the examples
; It is common to all of the examples
;
; Declare Special Function Registers used
TimerControl
DATA
088H
TimerMode
DATA
089H
Timer0Low
DATA
08AH
Timer0High
DATA
08CH
EI
DATA
0A8H
EIE
DATA
0E8H
; EZ-USB specific
EXIF
DATA
091H
; EZ-USB specific
EICON
DATA
0D8H
; EZ-USB specific
PageReg
DATA
092H
; EZ-USB specific, used with MOVX @Ri
DPS
DATA
086H
; EZ-USB specific, used with dual data pointers
;
; "External" memory locations used, EZ-USB specific
; Note that most of these variables are in Page 7FH
IsoOutValid
EQU
07FE1H
EP8OutStartAddr EQU
07FF0H
EP8OutBCL
EQU
07F71H
EP8OutData
EQU
07F60H
SETUPDAT
EQU
07FE8H
SUDPTR
EQU
07FD4H
EP0Control
EQU
07FB4H
EP0InBuffer
EQU
07F00H
EP0OutBuffer
EQU
07EC0H
; Not in Page 7FH
EP1InBuffer
EQU
07E80H
; Not in Page 7FH
IN0ByteCount
EQU
07FB5H
Out0ByteCount
EQU
07FC5H
IN1ByteCount
EQU
07FB7H
IN07IEN
EQU
07FACH
IN07IRQ
EQU
07FA9H
OUT07IEN
EQU
07FADH
OUT07IRQ
EQU
07FAAH
USBIEN
EQU
07FAEH
A51 MACRO ASSEMBLER
2
7FAB
7FD6
7FA6
7FA5
7F93
7F94
7F95
7F96
7F97
7F98
7F99
7F9A
7F9B
7F9C
7F9D
7F9E
---0020
0000
0001
0002
0003
0004
0021
0040
0040
0041
0043
0043
0044
0045
0046
0047
0048
0048
0049
004A
004B
004C
004D
004E
004F
0050
0051
0060
0060
---0000 0212E2
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
SPEAKER
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
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99
100
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102
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110
111
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114
115
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118
119
120
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122
123
124
01/28/2001 14:47:27 PAGE
USBIRQ
EQU
USBControl
EQU
I2CData
EQU
I2CControl
EQU
PortA_Config
EQU
PortB_Config
EQU
PortC_Config
EQU
PortA_OUT
EQU
PortB_OUT
EQU
PortC_OUT
EQU
PortA_PINS
EQU
PortB_PINS
EQU
PortC_PINS
EQU
PortA_OE
EQU
PortB_OE
EQU
PortC_OE
EQU
;
; Byte Variables
07FABH
07FD6H
07FA6H
07FA5H
07F93H
07F94H
07F95H
07F96H
07F97H
07F98H
07F99H
07F9AH
07F9BH
07F9CH
07F9DH
07F9EH
DSEG
FLAGS:
DS
; Bit Variables
Configured
EQU
STALL
EQU
SendData
EQU
IsDescriptor
EQU
SetAddress
EQU
;
MonitorSpace:
DS
DataSpace:
ReplyCount:
DS
ReplyBuffer:
DS
CurrentConfiguration:
DS
AltSetting:
DS
SaveDPH:
DS
SaveDPL:
DS
SaveLength:
DS
SetupData:
RequestType:
DS
Request:
DS
wValueLow:
DS
wValueHigh:
DS
wIndexLow:
DS
wIndexHigh:
DS
wLengthLow:
DS
wLengthHigh:
DS
;
INT0counter:
DS
SOFcounter:
DS
AT 20H
1
; This register is bit-addressable
FLAGS.0
FLAGS.1
FLAGS.2
FLAGS.3
FLAGS.4
;
;
;
;
;
1FH
; Used by Dscope
1
2
; Byte count for following buffer
; Buffer for immediate reply
1
1
1
1
1
; Some examples support > 1 configurations
; Speaker has two alternate settings (0, 1)
; Needed to save Descriptor Pointer ..
; .. for descriptors > EP0Size
; Number of bytes still to send
; Buffer in direct access memory
ORG 60H
IsoDataBuffer: DS
Is this device configured
Need to STALL endpoint 0
Need to send data to PC Host
Enable a shortcut reply
Set the SIE address
1
1
1
1
1
1
1
1
1
1
; Put on a xxx00000B boundary
16
;$include (EZInt.A51)
; This module contains all the EZUSB-specific hardware code
; This module also contains all of the interrupt vector declarations and
; the first level interrupt servicing (register save, call subroutine,
; clear interrupt source, restore registers, return)
; Suspend and Resume are handled totally in this module
;
; A Reset sends us to Program space location 0
CSEG AT 0
; Code space
USING 0
; Reset forces Register Bank 0
LJMP
Reset
;
A51 MACRO ASSEMBLER
3
000B
000B 02121C
0043
0043 021200
1200
1200
1203
1204
1207
1208
120B
120C
120F
1210
1213
1214
1217
1218
02126A
00
02124D
00
02121B
00
02121B
00
02122F
00
02121B
00
02123C
121B
121B
121B
121B
121B
121B
121B
121B
121B
121B
121B
121B
121B
121B
121B
121B 32
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
SPEAKER
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
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184
185
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190
01/28/2001 14:47:27 PAGE
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
The interrupt vector table is also located here
EZ-USB has two levels of USB interrupts:
1-the main level is described in this table (at ORG 43H)
2-there are 21 sources of USB interrupts and these are described in USB_ISR
This means that two levels of acknowledgement and clearing will be required
LJMP
INT0_ISR
; Features not used are commented out
ORG
0BH
LJMP
Timer0_ISR
ORG
13H
LJMP
INT1_ISR
ORG
1BH
LJMP
Timer1_ISR
ORG
23H
LJMP
UART0_ISR
ORG
2BH
LJMP
Timer2_ISR
ORG
33H
LJMP
WakeUp_ISR
ORG
3BH
LJMP
UART1_ISR
ORG
43H
LJMP
USB_ISR
; Auto Vector will replace byte 45H
ORG
4BH
LJMP
I2C_ISR
ORG
1200H
; Load above monSIO0.hex
USB_ISR:LJMP
SUDAV_ISR
DB
0
; Pad entries to 4 bytes
LJMP
SOF_ISR
DB
0
LJMP
SUTOK_ISR
DB
0
LJMP
Suspend_ISR
DB
0
LJMP
USBReset_ISR
DB
0
LJMP
Reserved
DB
0
LJMP
EP0In_ISR
;
DB
0
; Comment out features not used
;
LJMP
EP0Out_ISR
;
DB
0
;
LJMP
EP1In_ISR
;
DB
0
;
LJMP
EP1Out_ISR
;
DB
0
; End of Interrupt Vector tables
; When a feature is used insert the required interrupt processing here
; The example use only used Endpoints 0 and 1 and also SOF for timing
Reserved:
INT0_ISR:
INT1_ISR:
Timer1_ISR:
UART0_ISR:
Timer2_ISR:
UART1_ISR:
I2C_ISR:
SUTOK_ISR:
EP0Out_ISR:
EP1In_ISR:
EP1Out_ISR:
Suspend_ISR:
WakeUp_ISR:
Not_Used:
; Should not get any of these
RETI
A51 MACRO ASSEMBLER
4
121C
121C
121E
121F
1220
1221
1222
1225
1227
D2D3
C6
F3
C6
08
53080F
C2D3
32
1228
1228
122A
122C
122E
E591
C2E4
F591
22
122F
122F C200
1231 9010AB
1234
1234
1236
1238
123A
123B
123C
123C
123E
1240
1243
1246
1248
1248
124B
124D
124D
124F
1251
1253
1254
1256
1256
1258
1259
125A
125B
125D
125F
125F
1261
1262
1263
5128
747F
C583
F0
32
E547
6008
854583
854682
51B7
9001A9
80E7
7F10
7960
7871
E2
6009
7860
E2
F7
09
DFFB
8006
E56F
F7
09
DFFC
1265 9002AB
1268 80CA
126A
126A
126D
1270
1272
754700
907FE8
7848
7F08
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
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+1
+1
+1
+1
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+1
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+1
+1
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+1
+1
+1
+1
+1
+1
+1
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+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
SPEAKER
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
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209
210
211
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256
01/28/2001 14:47:27 PAGE
Timer0_ISR:
; Timer0 has just overflowed.
; This routine must be as fast as possible. Note that it changes no flags
SETB
RS0
; Use alternate register bank RB1
XCH
A, @R0
; Save A and GetNextValue.
MOVX
@R1, A
; Send next sample to DAC
XCH
A, @R0
; Restore A
INC
R0
; Point to next entry
ANL
8, #00001111B
; Memory 8 = R0 in RB1. Maintain a circular buffer
CLR
RS0
RETI
; Interrupt flag is cleared by the hardware
ClearINT2:
MOV
CLR
MOV
RET
; Tell the hardware that we're done
A, EXIF
ACC.4
EXIF, A
; Clear the Interrupt 2 bit
USBReset_ISR:
; Bus has been Reset, move to DEFAULT state
CLR
Configured
MOV
DPTR, #(1000H OR LOW(USBIRQ))
ExitISR:
; Common exit for all ISR's
; On entry DPH = Interrupt ID, DPL = LOW(Interrupt Register)
CALL
ClearINT2
MOV
A, #7FH
; EZ-USB I/O Register Page
XCH
A, DPH
MOVX
@DPTR, A
; Clear source of interrupt
RETI
EP0In_ISR:
MOV
JZ
MOV
MOV
CALL
NoMoreToSend:
MOV
JMP
; A prepared packet has been read by PC host
A, SaveLength
; Do I have any more data to send?
NoMoreToSend
DPH, SaveDPH
; Retreive descriptor pointer
DPL, SaveDPL
SendNextPieceOfDescriptor
DPTR, #(100H OR LOW(IN07IRQ))
ExitISR
SOF_ISR:
; A Start-Of-Frame packet has been received
MOV
R7, #16
; We need 16 samples every frame
MOV
R1, #IsoDataBuffer
MOV
R0, #LOW(EP8outBCL)
; Point to (low) of bytes received
MOVX
A, @R0
; Did we get a sample in the last frame?
JZ
RepeatLastSample
GetNewSamples:
MOV
R0, #LOW(EP8OutData)
GNSLoop:MOVX
A, @R0
; Copy ISO data to direct access buffer
MOV
@R1, A
INC
R1
DJNZ
R7, GNSLoop
SJMP
Done
RepeatLastSample:
MOV
A, IsoDataBuffer+15
; Get last sample
RLSLoop:MOV
@R1, A
INC
R1
DJNZ
R7, RLSLoop
;
Done:
MOV
DPTR, #(200H OR LOW(USBIRQ))
JMP
ExitISR
SUDAV_ISR:
MOV
MOV
MOV
MOV
SaveLength, #0
DPTR, #SETUPDAT
R0, #SetupData
R7, #8
; A Setup packet has been received
; Clear any pending transactions (if any)
; Copy packet to direct access memory
A51 MACRO ASSEMBLER
5
SPEAKER
1274
1275
1276
1277
1278
127A
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
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305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
E0
F6
A3
08
DFFA
716A
127C 200126
127F 300216
1282 200324
1285
1288
128A
128C
128D
128E
1290
1291
1293
1294
1294
1297
1297
1298
1298
129A
129A
129D
129E
129F
12A0
12A3
12A5
12A5
12A7
12A9
12A9
12AA
12AC
12AE
12AF
12B0
12B2
12B4
12B6
12B6
12B7
12B7
12B7
12B8
907F01
7842
7F02
E6
F0
1582
18
DFF9
E6
907FB5
F0
7F02
907FB4
E0
4F
F0
9001AB
808F
7F03
80F1
FF
E54F
7008
EF
C3
954E
E54E
5001
EF
FF
754700
12BB C3
12BC 9440
12BE 4015
12C0 F547
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
01/28/2001 14:47:27 PAGE
CopySD: MOVX
A, @DPTR
MOV
@R0, A
INC
DPTR
INC
R0
DJNZ
R7, CopySD
CALL
ServiceSetupPacket
; Handle the decode of the Setup packet
; if SetAddress { Update SIE address } // NOP on EZ-USB
; if STALL { Stall the endpoint }
; if SendData {
;
if IsDescriptor { send DPTR->descriptor, A = length }
;
else { send ReplyBuffer }
;
}
JB
STALL, SendSTALL
JNB
SendData, HandShake
JB
IsDescriptor, LoadEP0
; Send data in ReplyBuffer
MOV
DPTR, #EP0InBuffer+1
MOV
R0, #ReplyBuffer+1
MOV
R7, #2
; Copy the two byte buffer
CopyRB: MOV
A, @R0
MOVX
@DPTR, A
DEC
DPL
DEC
R0
DJNZ
R7, CopyRB
MOV
A, @R0
; Get BufferCount
SendEP0InBuffer:
MOV
DPTR, #In0ByteCount
StartXfer:
MOVX
@DPTR, A
; This write initiates the transfer
HandShake:
; Handshake with host
MOV
R7, #00000010b
; Set HSNAK to tell the SIE that we're done
SetEP0Control:
MOV
DPTR, #EP0Control
MOVX
A, @DPTR
ORL
A, R7
MOVX
@DPTR, A
; We're done
MOV
DPTR, #(100H OR LOW(USBIRQ))
JMP
ExitISR
SendSTALL:
; Invalid Request was received
MOV
R7, #00000011b
; Set EP0STALL and HSNAK
JMP
SetEP0Control
LoadEP0:
; Send the data pointed to by DPTR
MOV
R7, A
; Save LENGTH
; Need to return the smaller of "Requested Length" and "Actual Length"
; If "Requested Length" > 255 then use "Actual Length"
; There are no descriptors > 255 in this example
MOV
A, wLengthHigh
JNZ
UseActual
MOV
A, R7
; Retreive LENGTH
CLR
C
SUBB
A, wLengthLow
MOV
A, wLengthLow
; This does not affect Carry
JNC
UsewLengthLow
UseActual:
MOV
A, R7
UsewLengthLow:
SendNextPieceOfDescriptor:
; DPTR -> Descriptor to be sent
MOV
R7, A
; Save LENGTH again
MOV
SaveLength, #0
; Default case, overwrite if necessary
; Do I have more than a single packet to send?
CLR
C
SUBB
A, #EP0Size
JC
SendPacket
; Need to send multiple packets.
; Calculate and save address of next packet, send next packet now
MOV
SaveLength, A
; Send these next time
A51 MACRO ASSEMBLER
6
SPEAKER
12C2
12C4
12C6
12C8
12C9
12CB
12CE
12D1
12D3
12D5
12D5
12D6
12D7
12D9
12DA
12DB
12DC
12DD
12DF
12E0
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
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372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
7F40
C083
C082
EF
71AD
858345
858246
D082
D083
EF
FE
7800
E0
F2
A3
08
DEFA
EF
80B2
12E2
12E2 7581DF
12E5 75927F
12E8
12EA
12EB
12ED
12EE
12F0
12F1
12F3
12F4
12F5
78D6
E2
54F3
F2
7158
E2
4406
F2
E4
F520
12F7
12F7
12F9
12FB
12FC
12FD
12FE
12FF
1300
1301
1302
1303
1304
1305
1306
1308
1309
130B
7893
799C
04
F2
F3
08
09
14
F2
F4
F3
08
09
74C3
F2
74C2
F3
130C E589
130E 54F0
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
01/28/2001 14:47:27 PAGE
MOV
PUSH
PUSH
MOV
CALL
MOV
MOV
POP
POP
SendPacket:
MOV
MOV
MOV
CopySTD:MOVX
MOVX
INC
INC
DJNZ
MOV
JMP
R7, #EP0Size
DPH
DPL
A, R7
BumpDPTR
SaveDPH, DPH
SaveDPL, DPL
DPL
DPH
A, R7
R6, A
R0, #LOW(EP0InBuffer)
A, @DPTR
@R0, A
DPTR
R0
R6, CopySTD
A, R7
SendEP0InBuffer
; Save current pointer
; Retreive length
; Retreive length
; Save length in R6 for move
; PageReg = 7FH = HIGH(EP0InBuffer)
; Retrieve LENGTH
;$include (EZMain.A51)
; This module initializes the microcontroller then executes MAIN forever
; It is hardware dependant
Reset:
MOV
MOV
SP, #0DFH
PageReg, #7FH
; Initialize the Stack
; Allows MOVX Ri to access EZ-USB memory
MOV
MOVX
ANL
MOVX
CALL
MOVX
ORL
MOVX
CLR
MOV
R0, #Low(USBControl)
A, @R0
A, #11110011b
@R0, A
Wait200msec
A, @R0
A, #00000110b
@R0, A
A
FLAGS, A
; Simulate a disconnect
InitializeIOSystem:
; Clear DISCON, DISCOE
;
;
;
;
Give the host time to react
Reconnect with this new identity
Set DISCOE to enable pullup resistor
Set RENUM so that 8051 handles USB requests
; Start in Default state
; Setup for Simmbus A and B=output
; C=External RD#,WR#,TD0,TR0
; PageReg = 7F = HIGH(PortA_Config)
MOV
R0, #LOW(PortA_Config)
MOV
R1, #LOW(PortA_OE)
INC
A
;
MOVX
@R0, A
;
MOVX
@R1, A
;
INC
R0
;
INC
R1
;
DEC
A
;
MOVX
@R0, A
;
CPL
A
;
MOVX
@R1, A
;
INC
R0
;
INC
R1
;
MOV
A, #11000011b
;
MOVX
@R0, A
;
MOV
A, #11000010b
MOVX
@R1, A
;
; Use Timer 0 since dScope is using 1 (or
MOV
A, TimerMode
ANL
A, #11110000B
;
= 00000001B
Alternate function on bit 0 = Timer0 Out
Enable PortA for Input[7:1], Output[0]
Point to PortB_Config
Point to PortB_OE
= 0
No alternate functions
= 0FFH
Enable PortB for Output
Point to PortC_Config
Point to PortC_OE
Alternate functions on [7,6,1,0]
Most alternate functions are outputs
2)
Program Timer0 without changing Timer1
A51 MACRO ASSEMBLER
7
SPEAKER
1310 4402
1312 F589
1314 758C80
1317 758A9B
starting
131A
131A 78E1
131C 7401
131E F2
131F 18
1320 E4
1321 F2
1322 78F0
1324 F2
1325
1325 7401
1327 78AC
1329 F2
132A 08
132B E4
132C F2
132D 08
132E 7413
+1
+1
+1
+1
389
390
391
392
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
1330
1331
1332
1334
1335
1335
1337
1339
133B
133D
133E
133F
1340
1342
F2
08
7401
F2
1344
1346
1348
1349
1349
134A
134D
78AB
7402
F2
D2D3
7870
7997
7F10
E4
18
F6
DFFC
C2D3
E2
30E1FC
D28C
134F 75E801
1352 75A892
1355
1355 00
1356 80FD
1358
1358
135A
135A
135D
1360
1361
1363
1365
7FC8
758600
90FB50
A3
E582
4583
70F9
01/28/2001 14:47:27 PAGE
ORL
MOV
MOV
MOV
A, #00000010B
TimerMode, A
Timer0High, #128
Timer0Low, #(255-100)
; Timer0 = 8 bit auto reload
; 128 x 2MHz = 64usec
; First interrupt will occur 50usec after
InitializeEndpoints:
MOV
R0, #LOW(IsoOutValid)
;
MOV
A, #00000001B
;
MOVX
@R0, A
;
DEC
R0
;
CLR
A
MOVX
@R0, A
;
MOV
R0, #LOW(EP8OutStartAddr)
MOVX
@R0, A
;
InitializeInterruptSystem:
;
MOV
A, #00000001b
MOV
R0, #LOW(IN07IEN)
MOVX
@R0, A
;
INC
R0
CLR
A
MOVX
@R0, A
;
INC
R0
MOV
A, #00010011b
; Enable USBReset, (Resume, Suspend,) SOF
MOVX
@R0, A
INC
R0
MOV
A, #00000001b
MOVX
@R0, A
;
InitializeInterruptVariables:
SETB
RS0
;
MOV
R0, #IsoDataBuffer+16
MOV
R1, #LOW(PortB_Out)
MOV
R7, #16
CLR
A
IIVLoop:DEC
R0
MOV
@R0, A
DJNZ
R7, IIVLoop
CLR
RS0
;
; Synchronize start of Timer0 with SOF
MOV
R0, #LOW(USBIRQ)
MOV
A, #00000010B
MOVX
@R0, A
;
WaitForNextSOF:
MOVX
A, @R0
JNB
ACC.1, WaitForNextSOF
SETB
TimerControl.4
;
;
MOV
EIE, #00000001B
;
MOV
EI, #10010010B
;
;
EZ-USB uses Endpoints 8-15 for iso traffic
We'll use EP8, double buffered
Enable EP8 OUT
Point to IsoInValid
Disable EP8-15 In
Use the beginning of the ISO buffer
First initialize the USB level
Enable interrupts from EP0IN only
Disable interrupts from OUT Endpoints 0-7
and SUDAV INTs
Enable Auto Vectoring for USB interrupts
Select RB1 (used to service INT0)
Go back to RB0 for MAIN
Clear pending SOF
Start Timer0
Now enable the main level
Enable INT2 = USB Interrupt (only)
Enable interrupt subsystem
and Ser0 for dScope and Timer0
; Initialization Complete.
;
MAIN:
NOP
; Not much of a main loop for this example
JMP
MAIN
; All actions are initiated by interrupts
; We are a slave, we wait to be told what to do
Wait200msec:
MOV
Wait1msec:
MOV
MOV
More:
INC
MOV
ORL
JNZ
R7, #200
DPS, #0
DPTR, #-1200
DPTR
A, DPL
A, DPH
More
; A delay loop
; Select primary DPTR
;
;
;
;
3
+
+
+
cycles
2
2
3 = 10 cycles x 1200 = 1msec
A51 MACRO ASSEMBLER
8
SPEAKER
1367 DFF1
1369 22
+1
+1
+1
+1
+1
+1
+1
+1
455
456
457
458
459
460
461
462
463
464
465
466
467
468
+1
+1
469
470
MOV
ANL
SendData, C
A, #01011100b
+1
+1
+1
+1
+1
+1
471
472
473
474
475
476
JNZ
MOV
MOV
ANL
JC
JNB
BadRequest
A, RequestType
C, ACC.0
C, ACC.1
BadRequest
ACC.5, NotB5
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
477
478
479
480
481
482
483
484
485
486
487
488
489
MOV
ANL
SWAP
MOV
A, #00000011b
A, #00000011b
A
R7, A
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
; Since the table only contains byte offsets, it is important that all these routines
+1
+1
+1
516
517
518
; within one page (100H) of Subroutines
; V3.0 - CommandTable moved outside of this one page limited space
CommandTable:
---136A
136A E548
136C A2E7
to P
+1
+1
+1
+1
01/28/2001 14:47:27 PAGE
DJNZ
RET
R7, Wait1msec
;$include (Decode.A51)
; This module is common to all of the examples.
; It decodes the USB Setup Packets and generates appropriate responses.
; Interpretation of Reports is handled by MAIN
;
CSEG
ServiceSetupPacket:
MOV
A, RequestType
MOV
C, ACC.7
; Bit 7 = 1 means IO device needs to send data
C Host
136E 9202
1370 545C
BadRequest
1372 7035
1374 E548
1376 A2E0
1378 82E1
137A 402D
137C 30E502
[1,
; IF RequestType[6.4.3.2] = 1 THEN goto
; IF RequestType[1&0] = 1 THEN goto BadRequest
; IF RequestType[5] = 1 THEN RequestType[1,0] =
1]
137F
1381
1383
1384
7403
5403
C4
FF
1385
1387
1389
138B
138D
138F
E549
54F0
701E
E549
540F
4F
1390
to
1390
1393
1396
1399
139B
139D
139F
13A2
13A4
13A5
13A8
754001
754100
754200
C204
C201
C203
9013B6
71AD
E0
9013F6
73
13A9
13A9 D201
13AB 22
13AC
13AC
13AD
13AD
13AF
13B1
13B3
13B5
E0
2582
F582
5002
0583
22
NotB5:
MOV
A, Request
ANL
A, #11110000b
JNZ
BadRequest
MOV
A, Request
ANL
A, #00001111b
ORL
A, R7
;
CALL
CorrectSubroutine
CorrectSubroutine:
MOV
MOV
MOV
CLR
CLR
CLR
MOV
CALL
MOVX
MOV
JMP
BadRequest:
SETB
RET
NextDPTR:
MOVX
BumpDPTR:
ADD
MOV
JNC
INC
Skip:
RET
ReplyCount, #1
ReplyBuffer, #0
ReplyBuffer+1, #0
SetAddress
STALL
IsDescriptor
DPTR, #CommandTable
BumpDPTR
A, @DPTR
DPTR, #Subroutines
@A+DPTR
; Set CommandIndex[5,4] = RequestType[1,0]
; Save HI nibble of CommandIndex
; Set CommandIndex[3,0] = Request[3,0]
; Check if Request > 15
; Only 13 are defined today, handle in table
; goto CommandTable(CommandIndex)
; Jump to the subroutine that DPTR is pointing
; Set up a default reply
; Clear all flags
; Point to entry
; Get the offset
; Go to the correct Subroutine
; Decoded a Bad Request, STALL the Endpoint
STALL
; Support routines
; Returns (DPTR + byte DPTR is pointing to)
A, @DPTR
; Returns (DPTR + ACC)
A, DPL
DPL, A
Skip
DPH
; Need 16 bit arithmetic here
are
13B6
A51 MACRO ASSEMBLER
9
13B6
13B7
13B8
13B9
13BA
13BB
13BC
13BD
13BE
13BF
13C0
13C1
13C2
13C3
13C4
13C5
0A
00
00
00
00
03
39
00
06
12
00
00
00
00
00
00
13C6
13C7
13C8
13C9
13CA
13CB
13CC
13CD
13CE
13CF
13D0
13D1
13D2
13D3
13D4
13D5
0E
00
00
00
00
00
00
00
00
00
30
20
00
00
00
00
13D6
13D7
13D8
13D9
13DA
13DB
13DC
13DD
13DE
13DF
13E0
13E1
13E2
13E3
13E4
13E5
0E
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
13E6
13E7
13E8
13E9
13EA
13EB
13EC
13ED
13EE
13EF
13F0
13F1
13F2
13F3
00
00
00
00
00
00
00
00
00
00
00
00
00
00
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
SPEAKER
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
01/28/2001 14:47:27 PAGE
; First 16 commands are for the Device
DB LOW(Device_Get_Status - Subroutines)
DB LOW(Device_Clear_Feature - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Device_Set_Feature - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Set_Address - Subroutines)
DB LOW(Get_Descriptor - Subroutines)
DB LOW(Set_Descriptor - Subroutines)
DB LOW(Get_Configuration - Subroutines)
DB LOW(Set_Configuration - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
; Next 16 commands are for the Interface
DB LOW(Interface_Get_Status - Subroutines)
DB LOW(Interface_Clear_Feature - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Interface_Set_Feature - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Get_Class_Descriptor - Subroutines)
DB LOW(Set_Class_Descriptor - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Get_Interface - Subroutines)
DB LOW(Set_Interface - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
; Next 16 commands are for the Endpoint
DB LOW(Endpoint_Get_Status - Subroutines)
DB LOW(Endpoint_Clear_Feature - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Endpoint_Set_Feature - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Endpoint_Sync_Frame - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
; Next 16 commands are Class Requests
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
A51 MACRO ASSEMBLER
10
SPEAKER
13F4 00
13F5 00
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6
13F6 D201
13F8 22
13F9
13F9 D204
13FB 22
13FC
13FC 854341
13FF 22
1400
1400 754101
Powered(=1)
1403 22
1404
1404
1404 754002
1407 22
1408
1408 E54A
140A 6004
140C 14
140D 70E7
140F 04
1410
1410 F543
1412 13
1413 9200
1415 22
1416
1416 E54C
1418 14
1419 70DB
141B E54A
141D 6003
141F 14
1420 70D4
1422 854A44
1425 22
1426
1426 E54C
1428 14
1429 70CB
142B 854441
142E 22
142F
142F D203
01/28/2001 14:47:27 PAGE
DB LOW(Invalid - Subroutines)
DB LOW(Invalid - Subroutines)
Subroutines:
;
; Many requests are INVALID for this example
Set_Descriptor:
; Our Descriptors are static
Set_Class_Descriptor:
; Our Descriptors are static
Get_Class_Descriptor:
; We have no features that the PC host can read
Set_Idle:
; V3.0 Optional command, not supported
Get_Idle:
; V3.0 Optional command, not supported
Device_Set_Feature:
; We have no features that can be set or cleared
Interface_Set_Feature:
; We have no features that can be set or cleared
Endpoint_Set_Feature:
; We have no features that can be set or cleared
Endpoint_Clear_Feature:
; V3.0 We have no features that can be set or cleared
Device_Clear_Feature:
; We have no features that can be set or cleared
Interface_Clear_Feature:
; We have no features that can be set or cleared
Endpoint_Sync_Frame:
; We are not an Isonchronous device
Invalid:
SETB
Reply: RET
STALL
; Invalid Request made, STALL the Endpoint
Set_Address:
SETB
RET
SetAddress
; Set the address that the SIE will respond to
Get_Configuration:
; Respond with CurrentConfiguration
MOV
ReplyBuffer, CurrentConfiguration
RET
Device_Get_Status:
; Only two bits of Device Status are defined
MOV
ReplyBuffer, #1
; Bit 1=Remote Wakeup(=0), Bit 0=Self
RET
Interface_Get_Status:
Endpoint_Get_Status:
MOV
ReplyCount, #2
RET
Set_Configuration:
MOV
A, wValueLow
JZ
Deconfigured
DEC
A
JNZ
Invalid
INC
A
Deconfigured:
MOV
CurrentConfiguration, A
RRC
A
MOV
Configured, C
RET
Set_Interface:
MOV
A, wIndexLow
DEC
A
JNZ
Invalid
MOV
A, wValueLow
JZ
OKtoSet
DEC
A
JNZ
Invalid
OKtoSet:MOV
AltSetting, wValueLow
RET
Get_Interface:
MOV
A, wIndexLow
DEC
A
JNZ
Invalid
MOV
ReplyBuffer, AltSetting
RET
Get_Descriptor:
SETB
IsDescriptor
; Interface Status is currently defined as 0
; Need a two byte 0 response
; Valid values are 0 and 1
; Restore wValueLow
; Copy bit 0 into C
; Set Interface 1 Alternate setting
; Check PC Host is using interface #1
; Valid values are 0 and 1
; Return Interface 1 Alternate setting
; Check PC Host is using interface #1
; Host wants to know who/what we are
A51 MACRO ASSEMBLER
11
SPEAKER
1431
1433
1434
1437
1439
143A
143D
143F
1441
1442
1442
1443
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
;$include (DTables.A51)
; This module declares the descriptors
;
; This example has one Device Descriptor with:
;
One Configuration - 8-bit mono PCM speaker
;
Two Interfaces:
;
AudioControl - with two units
;
AudioStreaming - with two ALT settings
;
Multiple Sting Descriptors - to aid the user
;
CSEG
DeviceDescriptor:
DB 18, 1
; Length, Type
DB 10H, 1
; USB Rev 1.1 (=0110H, low=10H, High=01H)
DB 0, 0, 0
; Class, Subclass and Protocol
DB EP0Size
DB 42H, 42H, 9H, 0, 0, 1 ; Vendor ID, Product ID and Version
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
DB 1, 2, 0
; Manufacturer, Product & Serial# Names
DB 1
; #Configs
ConfigurationDescriptor:
DB 9, 2
; Length, Type
DB LOW(ConfigLength), HIGH(ConfigLength)
DB 2, 1, 0
; #Interfaces, Configuration#, Config. Name
DB 10000000b
; Attributes = Bus Powered
DB 250
; Max. Power is 250x2 = 500mA
AudioControlInterface:
DB 9, 4
; Length, Type
DB 0, 0, 0
; ID, No alternate setting, only uses EP0
DB 1
; Class = Audio
DB 1
; Sub-class = Audio Control
DB 0
; Protocol
DB 3
; Interface name
E54B
14
901458
601D
14
90146A
7003
7464
22
14
70B1
1445 9014CE
1448 E54A
144A
144A 600A
144C FF
144D 71AC
144F E0
Backsto
01/28/2001 14:47:27 PAGE
MOV
A, wValueHigh
DEC
A
; Valid Values are 1, 2 and 3
MOV
DPTR, #DeviceDescriptor
JZ
ReturnLength
DEC
A
MOV
DPTR, #ConfigurationDescriptor
JNZ
TryString
MOV
A, #ConfigLength
RET
TryString:
DEC
A
JNZ
Invalid
; Request is for a String Descriptor
MOV
DPTR, #String0
; Point to String 0
MOV
A, wValueLow
; Get String Index
NextString:
JZ
ReturnLength
MOV
R7, A
; Save String Index
CALL
NextDPTR
MOVX
A, @DPTR
; Get the String Length (= 0 means we're at
p)
1450
1452
1453
1454
1456
1456
1457
60A4
EF
14
80F4
E0
22
0062
---1458
1458
145A
145C
145F
1460
1464
1466
1469
146A
146A
146C
146E
1471
1472
1473
1473
1475
1478
1479
147A
147B
1201
1001
000000
40
42420900
0001
010200
01
0902
6400
020100
80
FA
0904
000000
01
01
00
03
JZ
Invalid
MOV
A, R7
DEC
A
JMP
NextString
ReturnLength:
MOVX
A, @DPTR
RET
; Error check: this MUST be on within a
WithinSamePage EQU $ - Subroutines
;
; Asked for a string I don't have
; Check if we are there yet
; Get Descriptor Length (first byte)
page of Subroutines
A51 MACRO ASSEMBLER
12
SPEAKER
147C
147C 0924
147E 01
147F 0001
1481 1E00
1483 01
1484 01
1485
1485 0C24
1487 02
1488 01
1489 0101
148B 00
148C 01
148D 0000
148F 00
1490 00
1491
1491 0924
1493 03
1494 02
1495 0103
1497 00
1498 01
1499 00
001E
149A
149A 0904
149C 010000
149F 01
14A0 02
14A1 00
14A2 04
14A3
14A3 0904
14A5 010101
14A8 01
14A9 02
14AA 00
14AB 04
14AC
14AC 0724
14AE 01
14AF 01
14B0 01
14B1 0200
14B3
14B3 0B24
14B5 02
14B6 01
14B7 01
14B8 01
14B9 08
14BA 01
14BB 803E00
14BE
14BE 0905
14C0 08
14C1 09
14C2 1000
14C4 01
14C5 00
14C6 00
14C7
14C7 0725
14C9 01
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
01/28/2001 14:47:27 PAGE
AudioControlClassInterface:
DB 9, 24H
; Length, Type = CS_INTERFACE
DB 1
; Subtype = HEADER
DB 0, 1
; Audio Device Class spec release (ver 1.0)
DB LOW(ClassLength), HIGH(ClassLength)
DB 1
; Number of AudioStreaming interfaces
DB 1
; AudioStreaming interface ID
InputTerminalDescriptor:
DB 12, 24H
; Length, Type = CS_INTERFACE
DB 2
; Subtype = INPUT_TERMINAL
DB 1
; Terminal ID
DB 1,1
; Terminal type = USB streaming
DB 0
; Terminal association (none)
DB 1
; Number of logical output channels
DW 0
; Channel configuration = mono
DB 0
; Channel name
DB 0
; Terminal name
OutputTerminalDescriptor:
DB 9, 24H
; Length, Type = CS_INTERFACE
DB 3
; Subtype = OUTPUT_TERMINAL
DB 2
; Terminal ID
DB 1,3
; Terminal type = Speaker
DB 0
; Terminal association (none)
DB 1
; ID of the source terminal
DB 0
; Terminal name
ClassLength EQU $-AudioControlClassInterface
AudioStreamingInterfaceAlt0:
DB 9, 4
; Length, Type
DB 1, 0, 0
; ID, Alternate setting, only uses EP0
DB 1
; Class = Audio
DB 2
; Sub-class = Audio Streaming
DB 0
; Protocol
DB 4
; Interface name
AudioStreamingInterfaceAlt1:
DB 9, 4
; Length, Type
DB 1, 1, 1
; ID, Alternate setting, Uses isochronous endpoint
DB 1
; Class = Audio
DB 2
; Sub-class = Audio Streaming
DB 0
; Protocol
DB 4
; Interface name
AudioStreamingClassInterface:
DB 7, 24H
; Length, Type
DB 1
; Subtype = AS_GENERAL
DB 1
; Terminal connected to
DB 1
; Interface delay
DB 2, 0
; Audio Data Format = PCM8
FormatTypeDescriptor:
DB 11, 24H
; Length, Type
DB 2
; Subtype = FORMAT_TYPE
DB 1
; Type 1
DB 1
; Number of physical channels
DB 1
; Number of bytes in an audio subframe
DB 8
; Number of bits per sample
DB 1
; Number of frequencies supported
DB 80H, 3EH, 0
; 16000Hz
EndpointDescriptor:
DB 9, 5
; Length, Type
DB 00001000B
; OUT Endpoint 8
DB 00001001B
; Transfer type = ADAPTIVE, ISOCHRONOUS
DB 16, 0
; Maximum packet size
DB 1
; Polling interval
DB 0
; Refresh (unused)
DB 0
; Endpoint used for syschronization info (unused)
ClassEndpointDescriptor:
DB 7, 25H
; Length, Type
DB 1
; Subtype = EP_GENERAL
A51 MACRO ASSEMBLER
13
SPEAKER
01/28/2001 14:47:27 PAGE
14CA 00
14CB 00
14CC 0000
0064
14CE
14CE 04030904
14D2
14D2 2C03
14D4 55005300
14D8 42002000
14DC 44006500
14E0 73006900
14E4 67006E00
14E8 2000
14EA 42007900
14EE 20004500
14F2 78006100
14F6 6D007000
14FA 6C006500
14FE
14FE 1E03
1500 53006900
1504 6D007000
1508 6C006500
150C 2000
150E 53007000
1512 65006100
1516 6B006500
151A 7200
151C 1A03
151E 41007500
1522 64006900
1526 6F00
1528 43006F00
152C 6E007400
1530 72006F00
1534 6C00
1536 1E03
1538 41007500
153C 64006900
1540 6F00
1542 53007400
1546 72006500
154A 61006D00
154E 69006E00
1552 6700
1554
1554 00
+1
+1
+1
+1
+1
+1
+1
+1
+1
781
782
783
784
785
786
787
788
789
+1
790
DB
+1
+1
+1
791
792
793
String2:
DB
DB
; Product Name
(String3-String2),3
"S",0,"i",0,"m",0,"p",0,"l",0,"e",0," ",0
+1
794
DB
"S",0,"p",0,"e",0,"a",0,"k",0,"e",0,"r",0
+1
+1
795
796
String3:DB
DB
+1
797
DB
+1
+1
798
799
String4:DB
DB
+1
800
DB
+1
+1
+1
801
802
803
804
805
806
EndOfDescriptors:
DB
0
DB 0
; Attributes (none)
DB 0
; Lock delay units (unused)
DW 0
; Lock delay (unused)
Configlength EQU $-ConfigurationDescriptor
String0:
; Declare the UNICODE strings
DB
4, 3, 9, 4
; Only English language strings supported
String1:
; Manufacturer
DB
(String2-String1),3 ; Length, Type
DB
"U",0,"S",0,"B",0," ",0,"D",0,"e",0,"s",0,"i",0,"g",0,"n",0," ", 0
END
"B",0,"y",0," ",0,"E",0,"x",0,"a",0,"m",0,"p",0,"l",0,"e",0
(String4-String3),3
"A",0,"u",0,"d",0,"i",0,"o",0
"C",0,"o",0,"n",0,"t",0,"r",0,"o",0,"l",0
(EndOfDescriptors-String4),3
"A",0,"u",0,"d",0,"i",0,"o",0
"S",0,"t",0,"r",0,"e",0,"a",0,"m",0,"i",0,"n",0,"g",0
; Backstop for String Descriptors