📄 usb.c
字号:
clrfeature();
break;
case GET_CONFIGURATION: //8
write_usb(TXD0,usb_cfg); /*load the config val */
break;
case GET_DESCRIPTOR: //6 //6次
getdescriptor();
break;
case GET_STATUS: //0
getstatus();
break;
case SET_ADDRESS: //5 //1次
write_usb(EPC0,DEF);
write_usb(FAR,usb_buf[2]|AD_EN);
break;
case SET_CONFIGURATION: //9 //1次
setconfiguration();
break;
case SET_FEATURE: //3
setfeature();
break;
case GET_INTERFACE: //10
write_usb(TXD0,0);
break;
case SET_INTERFACE: //11
if(usb_buf[2]) /*if the requested intf!=0*/
bitset(EPC0,STALL); /*stall the endpoint */
break;
default:
break;
}
else
{
}
write_usb(TXC0,TX_TOGL+TX_EN);
dtapid_TGL0PID=0;
}
else
{
if(status_GETDESC)
{
if((rxstat&0x5F)!=0x10)
{
}
status_GETDESC=0;
FLUSHTX0;
}
write_usb(RXC0,RX_EN);
}
}
/***************************************************************************
【功能说明】This subroutine handles RX events for FIFO1 (endpoint 2)
****************************************************************************/
void rxevent_1(void)
{
rxstat=read_usb(RXS1); /*get receiver status */
}
/***************************************************************************
【功能说明】This subroutine handles RX events for FIFO2 (endpoint 4)
****************************************************************************/
void rxevent_2(void)
{
rxstat=read_usb(RXS2); /*get receiver status */
}
/***************************************************************************
【功能说明】This subroutine handles RX events for FIFO3 (endpoint 6)
****************************************************************************/
void rxevent_3(void)
{
U8 i,bytes_count;
// U8 j = 0;
rxstat=read_usb(RXS3); /*get receiver status */
if(rxstat&SETUP_R)
{
}
else if(rxstat&RX_ERR)
{
FLUSHRX3; /*flush RX2 and disable */
write_usb(RXC3,RX_EN); /*re-enable the receiver */
}
else
{
/*
do{
bytes_count = read_usb(RXS3)&0x0f;
(*(volatile unsigned char *)0x02000002)=RXD3;
for(i = 0; i< bytes_count; i++)
{
COMbuf[j++] = (*(volatile unsigned char *)0x02000000);
COMlen++;
}
}while(bytes_count == 0x0f);
*/
do{
bytes_count = read_usb(RXS3)&0x0f;
(*(volatile unsigned char *)0x02000002)=RXD3;
for(i = 0; i< bytes_count; i++)
{
COMbuf[2][COMfront[2]++] = (*(volatile unsigned char *)0x02000000);
if(COMfront[2] > 64)
{
COMfront[2] = 0;
if(COMfront[2] == COMtail[2])
{
COMtail[2]++;
if(COMtail[2] > 64)
COMtail[2] = 0;
}
}
}
}while(bytes_count == 0x0f);
/*
while(read_usb(RXS3)&0x0f)
{
*Rev_COMptr=read_usb(RXD3);
Rev_COMptr++;
Rev_COMlen++;
}
*/
FLUSHRX3; /*flush RX2 and disable */
write_usb(RXC3,RX_EN); /*re-enable the receiver */
}
}
/***************************************************************************
【功能说明】This subroutine handles TX events for FIFO0 (endpoint 0)
****************************************************************************/
void txevent_0(void)
{
U8 lim;
txstat=read_usb(TXS0); /*get transmitter status*/
if((txstat&ACK_STAT)&&(txstat&TX_DONE))
{
FLUSHTX0;
if(status_GETDESC)
{
lim=desc_idx+8;
for(;((desc_idx<lim)&&(desc_idx<desc_sze));desc_idx++)
get_desc();
TXEN0_PID;
}
}
else
write_usb(RXC0,RX_EN); /*re-enable the receiver */
}
/***************************************************************************
【功能说明】This subroutine handles TX events for FIFO1 (endpoint 1)
****************************************************************************/
void txevent_1(void)
{
txstat=read_usb(TXS1); /*get transmitter status */
}
/***************************************************************************
【功能说明】This subroutine handles TX events for FIFO2 (endpoint 3)
****************************************************************************/
void txevent_2(void)
{
txstat=read_usb(TXS2); /*get transmitter status */
}
/***************************************************************************
【功能说明】This subroutine handles TX events for FIFO3 (endpoint 5)
****************************************************************************/
void txevent_3(void)
{
txstat=read_usb(TXS3); /*get transmitter status */
//Uart_Printf(0,"\n txstat=%x",txstat);
if (txstat & ACK_STAT)
{
/*-----------------------------------------------------------------------
* previous data packet from current ep was received successfully by host
*-----------------------------------------------------------------------*/
FLUSHTX3;
//Flag = TRUE;
}
else
{
/*------------------------------------
* there is no ACK
* retransmit the previous data packet
*------------------------------------*/
if(dtapid_TGL3PID)
write_usb(TXC3,TX_TOGL+TX_LAST+TX_EN+RFF);
else write_usb(TXC3,TX_LAST+TX_EN+RFF);
dtapid_TGL3PID=!dtapid_TGL3PID;
// write_usb(TXC3,TX_LAST+TX_EN+RFF);
}
}
/***************************************************************************
【功能说明】9603写控制,根据具体硬件结构修改
****************************************************************************/
void write_usb(unsigned char addr,unsigned char dat)
{
(*(volatile unsigned char *)0x02000002)=addr;
(*(volatile unsigned char *)0x02000000)=dat;
}
/***************************************************************************
【功能说明】9603读控制,根据具体硬件结构修改
****************************************************************************/
unsigned char read_usb(unsigned char addr)
{
(*(volatile unsigned char *)0x02000002)=addr;
return (*(volatile unsigned char *)0x02000000);
}
void bitset(unsigned char addr, unsigned char mask)
{
write_usb(addr,(read_usb(addr)|(mask))); /*set the bit (RMW) */
}
void bitclr(unsigned char addr, unsigned char mask)
{
write_usb(addr,(read_usb(addr)&(~mask))); /*clr the bit (RMW) */
}
/***************************************************************************
【功能说明】取描述符
****************************************************************************/
void getdescriptor(void)
{
status_GETDESC=1; /*enter GETDESC mode */
desc_typ=usb_buf[3]; /*store the type requested*/
/*select descriptor size and starting index */
if(desc_typ==DEVICE)
desc_sze=DEV_DESC_SIZE; /*DEV_DESC_SIZE=18 */
else if(desc_typ==CONFIGURATION)
desc_sze=CFG_DESC_SIZE; /*DEV_DESC_SIZE=18 */
if (desc_sze>usb_buf[6])
desc_sze=usb_buf[6];
for(desc_idx=0;((desc_idx<8)&&(desc_idx<desc_sze));desc_idx++)
get_desc();
}
void get_desc(void)
{
U8 desc_dta;
if(desc_typ==DEVICE)
{
desc_dta=DEV_DESC[desc_idx];
}
else if(desc_typ==CONFIGURATION)
desc_dta=CFG_DESC[desc_idx];
write_usb(TXD0,desc_dta);
}
/***************************************************************************
【功能说明】取状态
****************************************************************************/
void getstatus(void)
{
switch(usb_buf[0]&0x03) /*find request target */
{
case 0: /*DEVICE */
write_usb(TXD0,0); /*first byte is reserved */
break;
case 1: /*INTERFACE */
write_usb(TXD0,0); /*first byte is reserved */
break;
case 2: /*ENDPOINT */
switch(usb_buf[4]&0x0f) /*find specific endpoint */
{ /* (strip off dir. bit) */
case 0:
if(stall0)write_usb(TXD0,1);else write_usb(TXD0,0);
break;
case 1:
if(stall1)write_usb(TXD0,1);else write_usb(TXD0,0);
break;
case 2:
if(stall2)write_usb(TXD0,1);else write_usb(TXD0,0);
break;
case 3:
if(stall3)write_usb(TXD0,1);else write_usb(TXD0,0);
break;
case 4:
if(stall4)write_usb(TXD0,1);else write_usb(TXD0,0);
break;
case 5:
if(stall5)write_usb(TXD0,1);else write_usb(TXD0,0);
break;
case 6:
if(stall6)write_usb(TXD0,1);
else write_usb(TXD0,0); /*first byte is reserved */
break;
default:
break;
}
default:
break;
}
write_usb(TXD0,0); /*second byte is reserved */
}
/***************************************************************************
【功能说明】清除特性
****************************************************************************/
void clrfeature(void)
{
switch(usb_buf[0]&0x03) /*find request target*/
{
case 0: /*DEVICE */
break;
case 1: /*INTERFACE */
break;
case 2: /*ENDPOINT */
switch(usb_buf[4]&0x0f)/*find specific endpoint*/
{
case 0:
stall0=0;
break;
case 1:
stall1=0;
break;
case 2:
stall2=0;
break;
case 3:
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