📄 fw.lst
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C51 COMPILER V7.00 FW 09/27/2002 10:11:22 PAGE 1
C51 COMPILER V7.00, COMPILATION OF MODULE FW
OBJECT MODULE PLACED IN FW.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE FW.C OPTIMIZE(9,SIZE) DEBUG OBJECTEXTEND
stmt level source
1 //-----------------------------------------------------------------------------
2 // File: fw.c
3 // Contents: Firmware frameworks task dispatcher and device request parser
4 // source.
5 //
6 // Copyright (c) 1997 AnchorChips, Inc. All rights reserved
7 //-----------------------------------------------------------------------------
8 #include "ezusb.h"
9 #include "ezregs.h"
10
11 //-----------------------------------------------------------------------------
12 // Random Macros
13 //-----------------------------------------------------------------------------
14 #define min(a,b) (((a)<(b))?(a):(b))
15 #define max(a,b) (((a)>(b))?(a):(b))
16
17 //-----------------------------------------------------------------------------
18 // Constants
19 //-----------------------------------------------------------------------------
20
21 //-----------------------------------------------------------------------------
22 // Global Variables
23 //-----------------------------------------------------------------------------
24 volatile BOOL GotSUD;
25 BOOL Rwuen;
26 BOOL Selfpwr;
27 volatile BOOL Sleep; // Sleep mode enable flag
28
29 WORD pDeviceDscr; // Pointer to Device Descriptor; Descriptors may be moved
30 WORD pConfigDscr;
31 WORD pStringDscr;
32
33 //-----------------------------------------------------------------------------
34 // Prototypes
35 //-----------------------------------------------------------------------------
36 void SetupCommand(void);
37 void TD_Init(void);
38 void GpifInit(void);
39 void TD_Poll(void);
40 BOOL TD_Suspend(void);
41 BOOL TD_Resume(void);
42
43 BOOL DR_GetDescriptor(void);
44 BOOL DR_SetConfiguration(void);
45 BOOL DR_GetConfiguration(void);
46 BOOL DR_SetInterface(void);
47 BOOL DR_GetInterface(void);
48 BOOL DR_GetStatus(void);
49 BOOL DR_ClearFeature(void);
50 BOOL DR_SetFeature(void);
51 BOOL DR_VendorCmnd(void);
52
53 //-----------------------------------------------------------------------------
54 // Code
55 //-----------------------------------------------------------------------------
C51 COMPILER V7.00 FW 09/27/2002 10:11:22 PAGE 2
56
57 // Task dispatcher
58 void main(void)
59 {
60 1 DWORD i;
61 1 WORD offset;
62 1 DWORD DevDescrLen;
63 1 DWORD j=0;
64 1 WORD IntDescrAddr;
65 1 WORD ExtDescrAddr;
66 1
67 1 // Initialize Global States
68 1 Sleep = FALSE; // Disable sleep mode
69 1 Rwuen = FALSE; // Disable remote wakeup
70 1 Selfpwr = FALSE; // Disable self powered
71 1 GotSUD = FALSE; // Clear "Got setup data" flag
72 1
73 1 // Initialize user device
74 1 TD_Init();
75 1 GpifInit();
76 1
77 1 // The following section of code is used to relocate the descriptor table.
78 1 // Since the SUDPTRH and SUDPTRL are assigned the address of the descriptor
79 1 // table, the descriptor table must be located in on-part memory.
80 1 // The 4K demo tools locate all code sections in external memory.
81 1 // The descriptor table is relocated by the frameworks ONLY if it is found
82 1 // to be located in external memory.
83 1 pDeviceDscr = (WORD)&DeviceDscr;
84 1 pConfigDscr = (WORD)&ConfigDscr;
85 1 pStringDscr = (WORD)&StringDscr;
86 1 if ((WORD)&DeviceDscr & 0xe000)
87 1 {
88 2 IntDescrAddr = INTERNAL_DSCR_ADDR;
89 2 ExtDescrAddr = (WORD)&DeviceDscr;
90 2 DevDescrLen = (WORD)&UserDscr - (WORD)&DeviceDscr + 2;
91 2 for (i = 0; i < DevDescrLen; i++)
92 2 *((BYTE xdata *)IntDescrAddr+i) = 0xCD;
93 2 for (i = 0; i < DevDescrLen; i++)
94 2 *((BYTE xdata *)IntDescrAddr+i) = *((BYTE xdata *)ExtDescrAddr+i);
95 2 pDeviceDscr = IntDescrAddr;
96 2 offset = (WORD)&DeviceDscr - INTERNAL_DSCR_ADDR;
97 2 pConfigDscr -= offset;
98 2 pStringDscr -= offset;
99 2 }
100 1
101 1 EZUSB_IRQ_ENABLE(); // Enable USB interrupt (INT2)
102 1 EZUSB_ENABLE_RSMIRQ(); // Wake-up interrupt
103 1
104 1 // The 8051 is responsible for all USB events, even those that have happened
105 1 // before this point. We cannot ignore pending USB interrupts.
106 1 // The chip will come out of reset with the flags all cleared.
107 1 // USBIRQ = 0xff; // Clear any pending USB interrupt requests
108 1 PORTCCFG |= 0xc0; // Turn on r/w lines for external memory
109 1
110 1 USBBAV = USBBAV | 1 & ~bmBREAK; // Disable breakpoints and autovectoring
111 1 USBIEN |= bmSUDAV | bmSUTOK | bmSUSP | bmURES; // Enable selected interrupts
112 1 EA = 1; // Enable 8051 interrupts
113 1
114 1 #ifndef NO_RENUM
115 1 // Note: at full speed, high speed hosts may take 5 sec to detect device
116 1 EZUSB_Discon(TRUE); // Renumerate
117 1 #endif
C51 COMPILER V7.00 FW 09/27/2002 10:11:22 PAGE 3
118 1
119 1
120 1 CKCON = (CKCON&(~bmSTRETCH)) | FW_STRETCH_VALUE; // Set stretch to 0 (after renumeration)
121 1
122 1 // Task Dispatcher
123 1 while(TRUE) // Main Loop
124 1 {
125 2 if(GotSUD) // Wait for SUDAV
126 2 {
127 3 SetupCommand(); // Implement setup command
128 3 GotSUD = FALSE; // Clear SUDAV flag
129 3 }
130 2
131 2 // Poll User Device
132 2 // NOTE: Idle mode stops the processor clock. There are only two
133 2 // ways out of idle mode, the WAKEUP pin, and detection of the USB
134 2 // resume state on the USB bus. The timers will stop and the
135 2 // processor will not wake up on any other interrupts.
136 2 if (Sleep)
137 2 {
138 3 if(TD_Suspend())
139 3 {
140 4 Sleep = FALSE; // Clear the "go to sleep" flag. Do it here to prevent any race condition b
-etween wakeup and the next sleep.
141 4 do
142 4 {
143 5 EZUSB_Susp(); // Place processor in idle mode.
144 5 }
145 4 while(!Rwuen && EZUSB_EXTWAKEUP());
146 4 // Must continue to go back into suspend if the host has disabled remote wakeup
147 4 // *and* the wakeup was caused by the external wakeup pin.
148 4
149 4 // 8051 activity will resume here due to USB bus or Wakeup# pin activity.
150 4 EZUSB_Resume(); // If source is the Wakeup# pin, signal the host to Resume.
151 4 TD_Resume();
152 4 }
153 3 }
154 2 TD_Poll();
155 2 }
156 1 }
157
158 // Device request parser
159 void SetupCommand(void)
160 {
161 1 void *dscr_ptr;
162 1 DWORD i;
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