?? fw.lst
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C51 COMPILER V5.50, FW 26/07/00 13:53:26 PAGE 1
DOS C51 COMPILER V5.50, COMPILATION OF MODULE FW
OBJECT MODULE PLACED IN FW.OBJ
COMPILER INVOKED BY: C:\C51\BIN\C51.EXE FW.C DB OE MODDP2
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 // Adapted for use with HIDs by Jan Axelson (jan@lvr.com)
8 //-----------------------------------------------------------------------------
9 #include "ezusb.h"
10 #include "ezregs.h"
11
12 //-----------------------------------------------------------------------------
13 // Random Macros
14 //-----------------------------------------------------------------------------
15 #define min(a,b) (((a)<(b))?(a):(b))
16 #define max(a,b) (((a)>(b))?(a):(b))
17
18 //-----------------------------------------------------------------------------
19 // Constants
20 //-----------------------------------------------------------------------------
21 #define DELAY_COUNT 0x9248*8L // Delay for 8 sec at 24Mhz, 4 sec at 48
22
23 //-----------------------------------------------------------------------------
24 // Global Variables
25 //-----------------------------------------------------------------------------
26 volatile BOOL GotSUD;
27 BOOL Rwuen;
28 BOOL Selfpwr;
29 volatile BOOL Sleep; // Sleep mode enable flag
30
31 WORD pDeviceDscr; // Pointer to Device Descriptor; Descriptors may be moved
32 WORD pConfigDscr;
33 WORD pStringDscr;
34 // HID code start
35 WORD pReportDscr;
36 BYTE reportlen;
37 // HID code end
38
39 //-----------------------------------------------------------------------------
40 // Prototypes
41 //-----------------------------------------------------------------------------
42 void SetupCommand(void);
43 void TD_Init(void);
44 void TD_Poll(void);
45 BOOL TD_Suspend(void);
46 BOOL TD_Resume(void);
47
48 BOOL DR_GetDescriptor(void);
49 BOOL DR_SetConfiguration(void);
50 BOOL DR_GetConfiguration(void);
51 BOOL DR_SetInterface(void);
52 BOOL DR_GetInterface(void);
53 BOOL DR_GetStatus(void);
54 BOOL DR_ClearFeature(void);
55 BOOL DR_SetFeature(void);
56 BOOL DR_VendorCmnd(void);
57
58 //-----------------------------------------------------------------------------
59 // Code
C51 COMPILER V5.50, FW 26/07/00 13:53:26 PAGE 2
60 //-----------------------------------------------------------------------------
61
62 // Task dispatcher
63 void main(void)
64 {
65 1 DWORD i;
66 1 WORD offset;
67 1 DWORD DevDescrLen;
68 1 DWORD j=0;
69 1 WORD IntDescrAddr;
70 1 WORD ExtDescrAddr;
71 1
72 1 // Initialize Global States
73 1 Sleep = FALSE; // Disable sleep mode
74 1 Rwuen = FALSE; // Disable remote wakeup
75 1 Selfpwr = FALSE; // Disable self powered
76 1 GotSUD = FALSE; // Clear "Got setup data" flag
77 1
78 1 // Initialize user device
79 1 TD_Init();
80 1
81 1 // The following section of code is used to relocate the descriptor table.
82 1 // Since the SUDPTRH and SUDPTRL are assigned the address of the descriptor
83 1 // table, the descriptor table must be located in on-part memory.
84 1 // The 4K demo tools locate all code sections in external memory.
85 1 // The descriptor table is relocated by the frameworks ONLY if it is found
86 1 // to be located in external memory.
87 1 pDeviceDscr = (WORD)&DeviceDscr;
88 1 pConfigDscr = (WORD)&ConfigDscr;
89 1 pStringDscr = (WORD)&StringDscr;
90 1 // HID code start
91 1 pReportDscr = (WORD)&ReportDscr;
92 1 // HID code end
93 1
94 1 if ((WORD)&DeviceDscr & 0xe000)
95 1 {
96 2 IntDescrAddr = INTERNAL_DSCR_ADDR;
97 2 ExtDescrAddr = (WORD)&DeviceDscr;
98 2 DevDescrLen = (WORD)&UserDscr - (WORD)&DeviceDscr + 2;
99 2 for (i = 0; i < DevDescrLen; i++)
100 2 *((BYTE xdata *)IntDescrAddr+i) = 0xCD;
101 2 for (i = 0; i < DevDescrLen; i++)
102 2 *((BYTE xdata *)IntDescrAddr+i) = *((BYTE xdata *)ExtDescrAddr+i);
103 2 pDeviceDscr = IntDescrAddr;
104 2 offset = (WORD)&DeviceDscr - INTERNAL_DSCR_ADDR;
105 2 pConfigDscr -= offset;
106 2 pStringDscr -= offset;
107 2 // HID code start
108 2 pReportDscr -= offset;
109 2 // HID code end
110 2 }
111 1
112 1 EZUSB_IRQ_ENABLE(); // Enable USB interrupt (INT2)
113 1 EZUSB_ENABLE_RSMIRQ(); // Wake-up interrupt
114 1
115 1 // The 8051 is responsible for all USB events, even those that have happened
116 1 // before this point. We cannot ignore pending USB interrupts.
117 1 // The chip will come out of reset with the flags all cleared.
118 1 // USBIRQ = 0xff; // Clear any pending USB interrupt requests
119 1 PORTCCFG |= 0xc0; // Turn on r/w lines for external memory
120 1
121 1 USBBAV = USBBAV | 1 & ~bmBREAK; // Disable breakpoints and autovectoring
122 1 USBIEN |= bmSUDAV | bmSUTOK | bmSUSP | bmURES; // Enable selected interrupts
123 1 EA = 1; // Enable 8051 interrupts
124 1
125 1 // This loop waits until we receive a setup packet from the host.
C51 COMPILER V5.50, FW 26/07/00 13:53:26 PAGE 3
126 1 // NOTE: The device will continue to renumerate until it receives a setup
127 1 // packet. This fixes a microsoft USB bug that loses disconnect/reconnect
128 1 // events during initial USB device driver configuration dialog box.
129 1 // B2 Load: This code is not needed for B2 load, only for renumeration.
130 1 #ifndef NO_RENUM
131 1 while(!GotSUD)
132 1 {
133 2 if(!GotSUD)
134 2 EZUSB_Discon(TRUE); // renumerate until setup received
135 2 for(j=0;(j<DELAY_COUNT) && (!GotSUD);++j);
136 2 }
137 1 #endif
138 1
139 1
140 1 CKCON = (CKCON&(~bmSTRETCH)) | FW_STRETCH_VALUE; // Set stretch to 0 (after renumeration)
141 1
142 1 // Task Dispatcher
143 1 while(TRUE) // Main Loop
144 1 {
145 2 if(GotSUD) // Wait for SUDAV
146 2 {
147 3 SetupCommand(); // Implement setup command
148 3 GotSUD = FALSE; // Clear SUDAV flag
149 3 }
150 2
151 2 // Poll User Device
152 2 // NOTE: Idle mode stops the processor clock. There are only two
153 2 // ways out of idle mode, the WAKEUP pin, and detection of the USB
154 2 // resume state on the USB bus. The timers will stop and the
155 2 // processor will not wake up on any other interrupts.
156 2 if (Sleep)
157 2 {
158 3 if(TD_Suspend())
159 3 {
160 4 Sleep = FALSE; // Clear the "go to sleep" flag. Do it here to prevent any race condition b
-etween wakeup and the next sleep.
161 4 do
162 4 {
163 5 EZUSB_Susp(); // Place processor in idle mode.
164 5 }
165 4 while(!Rwuen && EZUSB_EXTWAKEUP());
166 4 // Must continue to go back into suspend if the host has disabled remote wakeup
167 4 // *and* the wakeup was caused by the external wakeup pin.
168 4
169 4 // 8051 activity will resume here due to USB bus or Wakeup# pin activity.
170 4 EZUSB_Resume(); // If source is the Wakeup# pin, signal the host to Resume.
171 4 TD_Resume();
172 4 }
173 3 }
174 2 TD_Poll();
175 2 }
176 1 }
177
178 // Device request parser
179 void SetupCommand(void)
180 // A Setup packet has been received.
181 {
182 1 //*dscr_ptr is the address of a descriptor??
183 1 void *dscr_ptr;
184 1 DWORD i;
185 1
186 1 switch(SETUPDAT[1])
187 1 //SETUPDAT[1] contains the control request
188 1 {
189 2 case SC_GET_DESCRIPTOR: // *** Get Descriptor
190 2 if(DR_GetDescriptor())
C51 COMPILER V5.50, FW 26/07/00 13:53:26 PAGE 4
191 2 //If the request is Get_Descriptor, find out which descriptor was requested.
192 2 switch(SETUPDAT[3])
193 2 //The descriptor type is in the high byte of wValue, stored in SETUPDAT[3].
194 2 {
195 3 case GD_DEVICE: // Device
196 3 //If the request is for a device descriptor, store the pointers
197 3 //in SUDPTRH and SUDPTRL and the hardware does the rest.
198 3 SUDPTRH = MSB(pDeviceDscr);
199 3 SUDPTRL = LSB(pDeviceDscr);
200 3 break;
201 3 case GD_CONFIGURATION: // Configuration
202 3 /*If the request is for a configuration descriptor, find out if the
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