能不能只发送一次呢？EP1设置为NAK的话只发送一次，之后就不再发送了
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CH32V317: 互联型青稞RISC-V MCU
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USBFS的EP1端点收发过程中，EP1一直发送数据，不停止
void USBFS_IRQHandler( void )
{
uint8_t intflag, intst, errflag;
uint16_t len;
intflag = USBFSD->INT_FG;
intst = USBFSD->INT_ST;
if( intflag & USBFS_UIF_TRANSFER )
{
switch (intst & USBFS_UIS_TOKEN_MASK)
{
/* data-in stage processing */
case USBFS_UIS_TOKEN_IN:
{
switch ( intst & ( USBFS_UIS_TOKEN_MASK | USBFS_UIS_ENDP_MASK ) )
{
/* end-point 0 data in interrupt */
case USBFS_UIS_TOKEN_IN | DEF_UEP0:
{
if( USBFS_SetupReqLen == 0 )
{
USBFSD->UEP0_CTRL_H = USBFS_UEP_R_TOG | USBFS_UEP_R_RES_ACK;
}
if ( ( USBFS_SetupReqType & USB_REQ_TYP_MASK ) != USB_REQ_TYP_STANDARD )
{
/* Non-standard request endpoint 0 Data upload */
}
else
{
/* Standard request endpoint 0 Data upload */
switch( USBFS_SetupReqCode )
{
case USB_GET_DESCRIPTOR:
len = USBFS_SetupReqLen >= DEF_USBD_UEP0_SIZE ? DEF_USBD_UEP0_SIZE : USBFS_SetupReqLen;
memcpy( USBFS_EP0_Buf, pUSBFS_Descr, len );
USBFS_SetupReqLen -= len;
pUSBFS_Descr += len;
USBFSD->UEP0_TX_LEN = len;
USBFSD->UEP0_CTRL_H ^= USBFS_UEP_T_TOG;
break;
case USB_SET_ADDRESS:
USBFSD->DEV_ADDR = (USBFSD->DEV_ADDR & USBFS_UDA_GP_BIT) | USBFS_DevAddr;
break;
default:
break;
}
}
break;
}
case USBFS_UIS_TOKEN_IN | DEF_UEP1:
USBFSD->UEP1_CTRL_H = ( USBFSD->UEP1_CTRL_H & ~USBFS_UEP_T_RES_MASK ) | USBFS_UEP_T_RES_ACK;//ACK///
USBFSD->UEP1_CTRL_H ^= USBFS_UEP_T_AUTO_TOG;
break;
default :
break;
}
}
break;
/* data-out stage processing */
case USBFS_UIS_TOKEN_OUT:
switch ( intst & ( USBFS_UIS_TOKEN_MASK | USBFS_UIS_ENDP_MASK ) )
{
/* end-point 0 data out interrupt */
case USBFS_UIS_TOKEN_OUT | DEF_UEP0:
len = USBFSD->RX_LEN;
break;
/* end-point 1 data out interrupt */
case USBFS_UIS_TOKEN_OUT | DEF_UEP1:
if ( intst & USBFS_UIS_TOG_OK )
{
USBFSD->UEP1_CTRL_H ^= USBFS_UEP_T_AUTO_TOG;
UsbRxDataHandle();
}
break;
}
break;
/* Setup stage processing */
case USBFS_UIS_TOKEN_SETUP:
{
USBFSD->UEP0_CTRL_H = USBFS_UEP_T_TOG|USBFS_UEP_T_RES_NAK|USBFS_UEP_R_TOG|USBFS_UEP_R_RES_NAK;
/* Store All Setup Values */
USBFS_SetupReqType = pUSBFS_SetupReqPak->bRequestType;
USBFS_SetupReqCode = pUSBFS_SetupReqPak->bRequest;//??????
USBFS_SetupReqLen = pUSBFS_SetupReqPak->wLength;
USBFS_SetupReqValue = pUSBFS_SetupReqPak->wValue;
USBFS_SetupReqIndex = pUSBFS_SetupReqPak->wIndex;
len = 0;
errflag = 0;
/* usb standard request processing */
switch( USBFS_SetupReqCode )
{
/* get device/configuration/string/report/... descriptors */
case USB_GET_DESCRIPTOR:
{
switch( (uint8_t)( USBFS_SetupReqValue >> 8 ) )
{
/* get usb device descriptor */
case USB_DESCR_TYP_DEVICE:
pUSBFS_Descr = MyDevDescr;
len = DEF_USBD_DEVICE_DESC_LEN;
break;
/* get usb configuration descriptor */
case USB_DESCR_TYP_CONFIG:
pUSBFS_Descr = MyCfgDescr;
len = MyCfgDescr[2];
break;
// /* get usb REPORT descriptor */
case USB_DESCR_TYP_REPORT:
pUSBFS_Descr=KeyRepDesc;
len=35;
break;
/* get usb string descriptor */
case USB_DESCR_TYP_STRING:
switch( (uint8_t)( USBFS_SetupReqValue & 0xFF ) )
{
/* Descriptor 0, Language descriptor */
case DEF_STRING_DESC_LANG:
pUSBFS_Descr = MyLangDescr;
len = MyLangDescr[0];
break;
/* Descriptor 1, Manufacturers String descriptor */
case DEF_STRING_DESC_MANU:
pUSBFS_Descr = MyManuInfo;
len = MyManuInfo[0];
break;
/* Descriptor 2, Product String descriptor */
case DEF_STRING_DESC_PROD:
pUSBFS_Descr = MyProdInfo;
len = MyProdInfo[0];
break;
default:
errflag = 0xFF;
break;
}
break;
default :
errflag = 0xFF;
break;
}
/* Copy Descriptors to Endp0 DMA buffer */
if( USBFS_SetupReqLen>len )
{
USBFS_SetupReqLen = len;
}
len = (USBFS_SetupReqLen >= DEF_USBD_UEP0_SIZE) ? DEF_USBD_UEP0_SIZE : USBFS_SetupReqLen;
memcpy( USBFS_EP0_Buf, pUSBFS_Descr, len );
pUSBFS_Descr += len;
break;
}
/* Set usb address */
case USB_SET_ADDRESS:
USBFS_DevAddr = (uint8_t)( USBFS_SetupReqValue & 0xFF );
break;
/* Get usb configuration now set */
case USB_GET_CONFIGURATION:
USBFS_EP0_Buf[0] = USBFS_DevConfig;
if ( USBFS_SetupReqLen > 1 )
{
USBFS_SetupReqLen = 1;
}
break;
/* Set usb configuration to use */
case USB_SET_CONFIGURATION:
USBFS_DevConfig = (uint8_t)( USBFS_SetupReqValue & 0xFF );
USBFS_DevEnumStatus = 0x01;
break;
/* Clear or disable one usb feature */
case USB_CLEAR_FEATURE://????????
{
if( ( USBFS_SetupReqType & USB_REQ_RECIP_MASK ) == USB_REQ_RECIP_ENDP )
{
/* Set End-point Feature */
// if( (uint8_t)( USBFS_SetupReqValue & 0xFF ) == USB_REQ_FEAT_ENDP_HALT ){
/* Set end-points status stall */
switch( (uint8_t)( USBFS_SetupReqIndex & 0xFF ) )//?????
{
case ( DEF_UEP_OUT | DEF_UEP1 ):
/* Set End-point 1 OUT STALL */
USBFSD->UEP1_CTRL_H =(USBFSD->UEP1_CTRL_H & ~USBFS_UEP_R_RES_MASK)| USBFS_UEP_R_RES_ACK;
break;
case (DEF_UEP_IN|DEF_UEP1):
USBFSD->UEP1_CTRL_H =(USBFSD->UEP1_CTRL_H & ~USBFS_UEP_T_RES_MASK)| USBFS_UEP_T_RES_NAK;//
break;
default:
errflag = 0xFF;
break;
}
// }
}
else
{
errflag = 0xFF;
}
break;
}
/* set or enable one usb feature */
case USB_SET_FEATURE:
break;
/* This request allows the host to select another setting for the specified interface */
case USB_GET_INTERFACE:
USBFS_EP0_Buf[0] = 0x00;
if ( USBFS_SetupReqLen > 1 )
{
USBFS_SetupReqLen = 1;
}
break;
//
// case USB_SET_INTERFACE:
// break;
/* host get status of specified device/interface/end-points */
case USB_GET_STATUS:
USBFS_EP0_Buf[ 0 ] = 0x00;
USBFS_EP0_Buf[ 1 ] = 0x00;
if( USBFS_SetupReqLen > 2 )
{
USBFS_SetupReqLen = 2;
}
break;
default:
errflag = 0xFF;
break;
}
/* errflag = 0xFF means a request not support or some errors occurred, else correct */
if( errflag == 0xff)
{
/* if one request not support, return stall */
USBFSD->UEP0_CTRL_H = USBFS_UEP_T_TOG|USBFS_UEP_T_RES_STALL|USBFS_UEP_R_TOG|USBFS_UEP_R_RES_STALL;
}
else
{
/* end-point 0 data Tx/Rx */
if( USBFS_SetupReqType & DEF_UEP_IN )
{
/* tx */
len = (USBFS_SetupReqLen>DEF_USBD_UEP0_SIZE) ? DEF_USBD_UEP0_SIZE : USBFS_SetupReqLen;
USBFS_SetupReqLen -= len;
USBFSD->UEP0_TX_LEN = len;
USBFSD->UEP0_CTRL_H = USBFS_UEP_T_TOG|USBFS_UEP_T_RES_ACK;
}
else
{
/* rx */
if( USBFS_SetupReqLen == 0 )
{
USBFSD->UEP0_TX_LEN = 0;
USBFSD->UEP0_CTRL_H = USBFS_UEP_T_TOG|USBFS_UEP_T_RES_ACK;
}
else
{
USBFSD->UEP0_CTRL_H = USBFS_UEP_R_TOG|USBFS_UEP_R_RES_ACK;
}
}
}
break;
}
/* Sof pack processing */
case USBFS_UIS_TOKEN_SOF:
break;
default :
break;
}
USBFSD->INT_FG = USBFS_UIF_TRANSFER;//一个USB数据发送完成
}
else if( intflag & USBFS_UIF_BUS_RST )
{
/* usb reset interrupt processing */
USBFS_DevConfig = 0;
USBFS_DevAddr = 0;
USBFS_DevSleepStatus = 0;
USBFS_DevEnumStatus = 0;
USBFSD->DEV_ADDR = 0;
USBFS_Device_Endp_Init( );
USBFSD->INT_FG = USBFS_UIF_BUS_RST;
}
else if( intflag & USBFS_UIF_SUSPEND )
{
/* usb suspend interrupt processing */
if ( USBFSD->MIS_ST & USBFS_UMS_SUSPEND )
{
// USBFS_DevSleepStatus |= 0x02;
}
else
{
// USBFS_DevSleepStatus &= ~0x02; ;
}
USBFSD->INT_FG = USBFS_UIF_SUSPEND;
}
else
{
/* other interrupts */
USBFSD->INT_FG = intflag;
}
}
OK了，我改成
USBFS_UEP_T_TOG
就行了
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