📄 usbisr.lst
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C51 COMPILER V7.01 USBISR 02/17/2006 15:09:24 PAGE 1
C51 COMPILER V7.01, COMPILATION OF MODULE USBISR
OBJECT MODULE PLACED IN USBISR.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE USBISR.C BROWSE MODP2 DEBUG OBJECTEXTEND
stmt level source
1 #include "InsUsb.h"
2
3 extern SYS_INFORMATION data sSysInformation;
4
5 extern unsigned char xdata mEp0OutBuffer[EP0_OUT_BUFFER_SIZE];
6 extern unsigned char data mEp1OutBuffer[EP1_OUT_BUFFER_SIZE]; //store led status
7 extern unsigned char xdata mRamBuffer[RAM_BUFFER_SIZE];
8
9
10 extern void D12AcknowledgeSetup(void);
11 extern unsigned char D12ReadInterruptRegister(void);
12 extern unsigned char D12ReadLastTransactionStatus(unsigned char bEndpointIndex);
13 extern unsigned char D12ReadBuffer(unsigned char bEndpointIndex, unsigned int bExpectedLength,unsigned cha
-r * pBuffer);
14 extern void D12WriteBuffer(unsigned char bEndpointIndex,unsigned char bLength, unsigned char * pBuffer);
15 extern void D12SetEndpointStatus(unsigned char bEndpointIndex, unsigned char bStalled);
16
17
18 //
19 //*************************************************************************//
20 // Paremeter:
21 // In : None
22 // Out: None
23 // Function:
24 // USB standard request and vendor/class request is impleemnted by control
25 // transfer.Every control transfer contains three stage: setup stage,data
26 // stage(optional) and status stage.At setup stage,we will receive a setup packet,
27 // it must be 8 byte and the meaning of setup packet please reference USB
28 // specification.
29 // For control-in transfer,there must has a data stage.At this stage,we must
30 // write data to PDIUSBD12 endpoint0-in buffer,and when received IN token,
31 // those data will be transmit to host by PDIUSBD12 automatically.At last when
32 // we received an OUT token from host,control-in transfer complete.
33 // For control-out transfer,there may be has a data stage or no.If it has no data
34 // stage,we can simply set device or interface or endpoint status according request,
35 // but if it has a data stage,we must receive those data,and deal with them.
36 // At last,if we receive a IN token,return zero length to host and control-out
37 // transfer complete.
38 void Ep0Out(void) //Control OUT transaction process
39 {
40 1 unsigned char data bLastTransactionStatus;
41 1 unsigned char data bDataLength;
42 1 unsigned char xdata * data pBuffer ;
43 1
44 1
45 1 //after ReadLastTransactionStatus,
46 1 //D12 will clear corresponding interrupt register flag bit automatically
47 1 bLastTransactionStatus = D12ReadLastTransactionStatus(D12_READ_LAST_TRANSACTION_STATUS_CONTROL_OUT);
48 1
49 1 #ifndef _INT_MODE_
#ifdef _Debug_
printf("Ep0Out last status is 0x%x\n",(unsigned int)(bLastTransactionStatus));
#endif
#endif
54 1 if (bLastTransactionStatus & D12_SETUP_PACKET_MASK) //if received a setup packet
C51 COMPILER V7.01 USBISR 02/17/2006 15:09:24 PAGE 2
55 1 {
56 2 //read buffer,save SETUP data to sSysInformation.sUsbDeviceRequest
57 2 bDataLength = D12ReadBuffer(D12_SELECT_ENDPOINT_CONTROL_OUT, USB_SETUP_PACKET_LENGTH,&sSysInformation.sU
-sbDeviceRequest.bmRequestType);
58 2
59 2 sSysInformation.sUsbDeviceRequest.wValue = WORD_SWAP(sSysInformation.sUsbDeviceRequest.wValue);
60 2 sSysInformation.sUsbDeviceRequest.wIndex = WORD_SWAP(sSysInformation.sUsbDeviceRequest.wIndex);
61 2 sSysInformation.sUsbDeviceRequest.wLength = WORD_SWAP(sSysInformation.sUsbDeviceRequest.wLength);
62 2
63 2 sSysInformation.sUsbSetUpDealwith.wRemaindLength = sSysInformation.sUsbDeviceRequest.wLength;
64 2
65 2 D12AcknowledgeSetup(); // Acknowledge setup
66 2
67 2 sSysInformation.bSetup = TRUE; //after received a setup packet,set flag
68 2
69 2 //if it is a control-in transfer
70 2 if (sSysInformation.sUsbDeviceRequest.bmRequestType & USB_ENDPOINT_DIRECTION_MASK)
71 2 sSysInformation.bUsbStatus = TRANSMIT;
72 2 //else it is control-out
73 2 else
74 2 {
75 3 //Interface Studio USB1.1 develop board support control-out transfer with data
76 3 //stage.This firmware will save data to mEp0OutBuffer,which size is 128 byte,
77 3 //and user should assure data length of control-out transfer no more than it,else
78 3 //firmware will stall endpoint0.The meaning of received data should be interpreted by
79 3 //user,as a demo,firmware demenstrate how to deal with SetDeviceSerialNumber request,
80 3 //which is a vendor defined request;other control-out transfer will be resvered for
81 3 //user to determine how to deal with them.
82 3 if (sSysInformation.sUsbDeviceRequest.wLength > EP0_OUT_BUFFER_SIZE)
83 3 {
84 4 CONTROL_ENDPOINT_STALL //set control endpoint stall
85 4 }
86 3 //For contro-out transfer,it may be has data stage or no data stage.
87 3 //Whichever we should return status stage only after we had completed the required
88 3 //operation.So we set bControOutCommandIsPending and bControlOutDataComplete flags
89 3 // to help we judge whether the data is received.
90 3 else
91 3 {
92 4 sSysInformation.bUsbStatus = RECEIVE;
93 4 sSysInformation.sUsbSetUpDealwith.bControlOutDataComplete = FALSE;
94 4 sSysInformation.sUsbSetUpDealwith.bControOutCommandIsPending = TRUE;
95 4 }
96 3 }
97 2 }
98 1 //if endpoint0-out received a packet which is not a setup packet
99 1 else
100 1 {
101 2 if (sSysInformation.bUsbStatus == RECEIVE)
102 2 {
103 3 if (sSysInformation.sUsbSetUpDealwith.wRemaindLength>0)
104 3 {
105 4 pBuffer = &mEp0OutBuffer + \
106 4 (sSysInformation.sUsbDeviceRequest.wLength-sSysInformation.sUsbSetUpDealwith.wRemaindLength);
107 4 bDataLength = D12ReadBuffer(D12_SELECT_ENDPOINT_CONTROL_OUT,sSysInformation.sUsbSetUpDealwith.wRemaind
-Length, pBuffer);
108 4 if (bDataLength == D12_BUFFER_LENGTH_ERROR)
109 4 {
110 5 //D12_BUFFER_LENGTH_ERROR shows received data length is longer than expected length,
111 5 //this is a serious error,so we stall control endpoint
112 5 CONTROL_ENDPOINT_STALL //set control endpoint stall
113 5 }
114 4 else
C51 COMPILER V7.01 USBISR 02/17/2006 15:09:24 PAGE 3
115 4 {
116 5 //get remaind data length
117 5 sSysInformation.sUsbSetUpDealwith.wRemaindLength -= bDataLength;
118 5 //if remaind data length is 0, current data stage of control-out transfer
119 5 //will be finished.
120 5 if (sSysInformation.sUsbSetUpDealwith.wRemaindLength<=0)
121 5 {
122 6 sSysInformation.sUsbSetUpDealwith.bControlOutDataComplete = TRUE;
123 6 }
124 5 }
125 4 }
126 3 else //unexpected out packet,we should stall control endpoint
127 3 {
128 4 CONTROL_ENDPOINT_STALL //set control endpoint stall
129 4 }
130 3
131 3 }
132 2
133 2 else if (sSysInformation.bUsbStatus == TRANSMIT)
134 2 {
135 3 //If remaind data length is zero and current status is TRANSMIT,
136 3 //it shows data stage of control-in transfer will be finished
137 3 //For control-in transfer,Host will send a zero length out packet to device
138 3 //as status stage which flags control-in transfer is finished.see 8.5.2.1
139 3 if (sSysInformation.sUsbSetUpDealwith.wRemaindLength<=0)
140 3 {
141 4 sSysInformation.bUsbStatus = IDLE;
142 4 }
143 3 else
144 3 {
145 4 //this is an unexpected OUT packet,so we should stall endpoint0
146 4 CONTROL_ENDPOINT_STALL //set control endpoint stall
147 4 }
148 3 }
149 2 else //if IDLE state
150 2 {
151 3 //this is an unexpected OUT packet,so we should stall endpoint0
152 3 CONTROL_ENDPOINT_STALL //set control endpoint stall
153 3 }
154 2 }
155 1 }
156
157
158
159 //
160 //*************************************************************************
161 // Paremeter:
162 // In : None
163 // Out: None
164 // Function:
165 // All control-in transfer has a data stage.This function will check whether
166 // there are remaind data should transfer to host.
167 // Anaother case is,a control-out transfer expect a IN token as status stage
168 // to complete this transfer.
169 void Ep0In(void)
170 {
171 1 unsigned char data bLastTransactionStatus;
172 1 unsigned char data bDataLength;
173 1 unsigned char data i;
174 1
175 1 bLastTransactionStatus = D12ReadLastTransactionStatus(D12_READ_LAST_TRANSACTION_STATUS_CONTROL_IN); // Cl
-ear interrupt flag
C51 COMPILER V7.01 USBISR 02/17/2006 15:09:24 PAGE 4
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