整体流程应为先进入
void USB_LP_IRQHandler(void)
{
HAL_PCD_IRQHandler(&hpcd_USB_FS);
}
转到
void HAL_PCD_IRQHandler(PCD_HandleTypeDef *hpcd)
{
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_CTR))
{
/* servicing of the endpoint correct transfer interrupt */
/* clear of the CTR flag into the sub */
(void)PCD_EP_ISR_Handler(hpcd);
}
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_RESET))
{
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_RESET);
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->ResetCallback(hpcd);
#else
HAL_PCD_ResetCallback(hpcd);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
(void)HAL_PCD_SetAddress(hpcd, 0U);
}
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_PMAOVR))
{
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_PMAOVR);
}
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_ERR))
{
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_ERR);
}
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_WKUP))
{
hpcd->Instance->CNTR &= (uint16_t) ~(USB_CNTR_LPMODE);
hpcd->Instance->CNTR &= (uint16_t) ~(USB_CNTR_FSUSP);
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->ResumeCallback(hpcd);
#else
HAL_PCD_ResumeCallback(hpcd);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_WKUP);
}
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_SUSP))
{
/* Force low-power mode in the macrocell */
hpcd->Instance->CNTR |= USB_CNTR_FSUSP;
/* clear of the ISTR bit must be done after setting of CNTR_FSUSP */
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_SUSP);
hpcd->Instance->CNTR |= USB_CNTR_LPMODE;
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_WKUP) == 0U)
{
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->SuspendCallback(hpcd);
#else
HAL_PCD_SuspendCallback(hpcd);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
}
}
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_SOF))
{
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_SOF);
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->SOFCallback(hpcd);
#else
HAL_PCD_SOFCallback(hpcd);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
}
if (__HAL_PCD_GET_FLAG(hpcd, USB_ISTR_ESOF))
{
/* clear ESOF flag in ISTR */
__HAL_PCD_CLEAR_FLAG(hpcd, USB_ISTR_ESOF);
}
}
再到ep的中断
static HAL_StatusTypeDef PCD_EP_ISR_Handler(PCD_HandleTypeDef *hpcd)
{
PCD_EPTypeDef *ep;
uint16_t count;
uint16_t wIstr;
uint16_t wEPVal;
uint8_t epindex;
/* stay in loop while pending interrupts */
while ((hpcd->Instance->ISTR & USB_ISTR_CTR) != 0U)
{
wIstr = hpcd->Instance->ISTR;
/* extract highest priority endpoint number */
epindex = (uint8_t)(wIstr & USB_ISTR_EP_ID);
if (epindex == 0U)
{
/* Decode and service control endpoint interrupt */
/* DIR bit = origin of the interrupt */
if ((wIstr & USB_ISTR_DIR) == 0U)
{
/* DIR = 0 */
/* DIR = 0 => IN int */
/* DIR = 0 implies that (EP_CTR_TX = 1) always */
PCD_CLEAR_TX_EP_CTR(hpcd->Instance, PCD_ENDP0);
ep = &hpcd->IN_ep[0];
ep->xfer_count = PCD_GET_EP_TX_CNT(hpcd->Instance, ep->num);
ep->xfer_buff += ep->xfer_count;
/* TX COMPLETE */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->DataInStageCallback(hpcd, 0U);
#else
HAL_PCD_DataInStageCallback(hpcd, 0U);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
if ((hpcd->USB_Address > 0U) && (ep->xfer_len == 0U))
{
hpcd->Instance->DADDR = ((uint16_t)hpcd->USB_Address | USB_DADDR_EF);
hpcd->USB_Address = 0U;
}
}
else
{
/* DIR = 1 */
/* DIR = 1 & CTR_RX => SETUP or OUT int */
/* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */
ep = &hpcd->OUT_ep[0];
wEPVal = PCD_GET_ENDPOINT(hpcd->Instance, PCD_ENDP0);
if ((wEPVal & USB_EP_SETUP) != 0U)
{
/* Get SETUP Packet*/
ep->xfer_count = PCD_GET_EP_RX_CNT(hpcd->Instance, ep->num);
USB_ReadPMA(hpcd->Instance, (uint8_t *)hpcd->Setup, ep->pmaadress, (uint16_t)ep->xfer_count);
/* SETUP bit kept frozen while CTR_RX = 1*/
PCD_CLEAR_RX_EP_CTR(hpcd->Instance, PCD_ENDP0);
/* Process SETUP Packet*/
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->SetupStageCallback(hpcd);
#else
HAL_PCD_SetupStageCallback(hpcd);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
}
else if ((wEPVal & USB_EP_CTR_RX) != 0U)
{
PCD_CLEAR_RX_EP_CTR(hpcd->Instance, PCD_ENDP0);
/* Get Control Data OUT Packet*/
ep->xfer_count = PCD_GET_EP_RX_CNT(hpcd->Instance, ep->num);
if (ep->xfer_count != 0U)
{
USB_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaadress, (uint16_t)ep->xfer_count);
ep->xfer_buff += ep->xfer_count;
}
/* Process Control Data OUT Packet*/
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->DataOutStageCallback(hpcd, 0U);
#else
HAL_PCD_DataOutStageCallback(hpcd, 0U);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
PCD_SET_EP_RX_CNT(hpcd->Instance, PCD_ENDP0, ep->maxpacket);
PCD_SET_EP_RX_STATUS(hpcd->Instance, PCD_ENDP0, USB_EP_RX_VALID);
}
}
}
else
{
/* Decode and service non control endpoints interrupt */
/* process related endpoint register */
wEPVal = PCD_GET_ENDPOINT(hpcd->Instance, epindex);
if ((wEPVal & USB_EP_CTR_RX) != 0U)
{
/* clear int flag */
PCD_CLEAR_RX_EP_CTR(hpcd->Instance, epindex);
ep = &hpcd->OUT_ep[epindex];
/* OUT double Buffering*/
if (ep->doublebuffer == 0U)
{
count = (uint16_t)PCD_GET_EP_RX_CNT(hpcd->Instance, ep->num);
if (count != 0U)
{
USB_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaadress, count);
}
}
else
{
if ((PCD_GET_ENDPOINT(hpcd->Instance, ep->num) & USB_EP_DTOG_RX) != 0U)
{
/*read from endpoint BUF0Addr buffer*/
count = (uint16_t)PCD_GET_EP_DBUF0_CNT(hpcd->Instance, ep->num);
if (count != 0U)
{
USB_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaaddr0, count);
}
}
else
{
/*read from endpoint BUF1Addr buffer*/
count = (uint16_t)PCD_GET_EP_DBUF1_CNT(hpcd->Instance, ep->num);
if (count != 0U)
{
USB_ReadPMA(hpcd->Instance, ep->xfer_buff, ep->pmaaddr1, count);
}
}
/* free EP OUT Buffer */
PCD_FreeUserBuffer(hpcd->Instance, ep->num, 0U);
}
/*multi-packet on the NON control OUT endpoint*/
ep->xfer_count += count;
ep->xfer_buff += count;
if ((ep->xfer_len == 0U) || (count < ep->maxpacket))
{
/* RX COMPLETE */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->DataOutStageCallback(hpcd, ep->num);
#else
HAL_PCD_DataOutStageCallback(hpcd, ep->num);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
}
else
{
(void)HAL_PCD_EP_Receive(hpcd, ep->num, ep->xfer_buff, ep->xfer_len);
}
} /* if((wEPVal & EP_CTR_RX) */
if ((wEPVal & USB_EP_CTR_TX) != 0U)
{
ep = &hpcd->IN_ep[epindex];
/* clear int flag */
PCD_CLEAR_TX_EP_CTR(hpcd->Instance, epindex);
/*multi-packet on the NON control IN endpoint*/
ep->xfer_count = PCD_GET_EP_TX_CNT(hpcd->Instance, ep->num);
ep->xfer_buff += ep->xfer_count;
/* Zero Length Packet? */
if (ep->xfer_len == 0U)
{
/* TX COMPLETE */
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
hpcd->DataInStageCallback(hpcd, ep->num);
#else
HAL_PCD_DataInStageCallback(hpcd, ep->num);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
}
else
{
(void)HAL_PCD_EP_Transmit(hpcd, ep->num, ep->xfer_buff, ep->xfer_len);
}
}
}
}
return HAL_OK;
}
在中断里调用
void HAL_PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd)
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
{
USBD_LL_SetupStage((USBD_HandleTypeDef*)hpcd->pData, (uint8_t *)hpcd->Setup);
}
PCD_EP_ISR_Handler
来进行USB的枚举或者配置
USBD_StatusTypeDef USBD_LL_SetupStage(USBD_HandleTypeDef *pdev, uint8_t *psetup)
{
USBD_ParseSetupRequest(&pdev->request, psetup);
pdev->ep0_state = USBD_EP0_SETUP;
pdev->ep0_data_len = pdev->request.wLength;
switch (pdev->request.bmRequest & 0x1FU)
{
case USB_REQ_RECIPIENT_DEVICE:
USBD_StdDevReq (pdev, &pdev->request);
break;
case USB_REQ_RECIPIENT_INTERFACE:
USBD_StdItfReq(pdev, &pdev->request);
break;
case USB_REQ_RECIPIENT_ENDPOINT:
USBD_StdEPReq(pdev, &pdev->request);
break;
default:
USBD_LL_StallEP(pdev, (pdev->request.bmRequest & 0x80U));
break;
}
return USBD_OK;
}
第一步应该是get USB_REQ_GET_DESCRIPTOR
USBD_StatusTypeDef USBD_StdDevReq (USBD_HandleTypeDef *pdev , USBD_SetupReqTypedef *req)
{
USBD_StatusTypeDef ret = USBD_OK;
switch (req->bmRequest & USB_REQ_TYPE_MASK)
{
case USB_REQ_TYPE_CLASS:
case USB_REQ_TYPE_VENDOR:
pdev->pClass->Setup(pdev, req);
break;
case USB_REQ_TYPE_STANDARD:
switch (req->bRequest)
{
case USB_REQ_GET_DESCRIPTOR:
USBD_GetDescriptor (pdev, req);
break;
case USB_REQ_SET_ADDRESS:
USBD_SetAddress (pdev, req);
break;
case USB_REQ_SET_CONFIGURATION:
USBD_SetConfig (pdev, req);
break;
case USB_REQ_GET_CONFIGURATION:
USBD_GetConfig (pdev, req);
break;
case USB_REQ_GET_STATUS:
USBD_GetStatus (pdev, req);
break;
case USB_REQ_SET_FEATURE:
USBD_SetFeature (pdev, req);
break;
case USB_REQ_CLEAR_FEATURE:
USBD_ClrFeature (pdev, req);
break;
default:
USBD_CtlError(pdev, req);
break;
}
break;
default:
USBD_CtlError(pdev, req);
break;
}
return ret;
}
获取描述符
pbuf = pdev->pDesc->GetProductStrDescriptor(pdev->dev_speed, &len);
static void USBD_GetDescriptor(USBD_HandleTypeDef *pdev ,
USBD_SetupReqTypedef *req)
{
uint16_t len;
uint8_t *pbuf;
switch (req->wValue >> 8)
{
#if (USBD_LPM_ENABLED == 1U)
case USB_DESC_TYPE_BOS:
pbuf = pdev->pDesc->GetBOSDescriptor(pdev->dev_speed, &len);
break;
#endif
case USB_DESC_TYPE_DEVICE:
pbuf = pdev->pDesc->GetDeviceDescriptor(pdev->dev_speed, &len);
break;
case USB_DESC_TYPE_CONFIGURATION:
if(pdev->dev_speed == USBD_SPEED_HIGH )
{
pbuf = (uint8_t *)pdev->pClass->GetHSConfigDescriptor(&len);
pbuf[1] = USB_DESC_TYPE_CONFIGURATION;
}
else
{
pbuf = (uint8_t *)pdev->pClass->GetFSConfigDescriptor(&len);
pbuf[1] = USB_DESC_TYPE_CONFIGURATION;
}
break;
case USB_DESC_TYPE_STRING:
switch ((uint8_t)(req->wValue))
{
case USBD_IDX_LANGID_STR:
pbuf = pdev->pDesc->GetLangIDStrDescriptor(pdev->dev_speed, &len);
break;
case USBD_IDX_MFC_STR:
pbuf = pdev->pDesc->GetManufacturerStrDescriptor(pdev->dev_speed, &len);
break;
case USBD_IDX_PRODUCT_STR:
pbuf = pdev->pDesc->GetProductStrDescriptor(pdev->dev_speed, &len);
break;
case USBD_IDX_SERIAL_STR:
pbuf = pdev->pDesc->GetSerialStrDescriptor(pdev->dev_speed, &len);
break;
case USBD_IDX_CONFIG_STR:
pbuf = pdev->pDesc->GetConfigurationStrDescriptor(pdev->dev_speed, &len);
break;
case USBD_IDX_INTERFACE_STR:
pbuf = pdev->pDesc->GetInterfaceStrDescriptor(pdev->dev_speed, &len);
break;
default:
#if (USBD_SUPPORT_USER_STRING == 1U)
pbuf = pdev->pClass->GetUsrStrDescriptor(pdev, (req->wValue) , &len);
break;
#else
USBD_CtlError(pdev , req);
return;
#endif
}
break;
case USB_DESC_TYPE_DEVICE_QUALIFIER:
if(pdev->dev_speed == USBD_SPEED_HIGH)
{
pbuf = (uint8_t *)pdev->pClass->GetDeviceQualifierDescriptor(&len);
break;
}
else
{
USBD_CtlError(pdev , req);
return;
}
case USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION:
if(pdev->dev_speed == USBD_SPEED_HIGH )
{
pbuf = (uint8_t *)pdev->pClass->GetOtherSpeedConfigDescriptor(&len);
pbuf[1] = USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION;
break;
}
else
{
USBD_CtlError(pdev , req);
return;
}
default:
USBD_CtlError(pdev , req);
return;
}
if((len != 0U) && (req->wLength != 0U))
{
len = MIN(len, req->wLength);
USBD_CtlSendData (pdev, pbuf, len);
}
if(req->wLength == 0U)
{
USBD_CtlSendStatus(pdev);
}
}
最后转到
USBD_FS_ProductStrDescriptor
uint8_t * USBD_FS_ProductStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
if(speed == 0)
{
USBD_GetString((uint8_t *)USBD_PRODUCT_STRING_FS, USBD_StrDesc, length);
}
else
{
USBD_GetString((uint8_t *)USBD_PRODUCT_STRING_FS, USBD_StrDesc, length);
}
return USBD_StrDesc;
}
从而获得描述符
但是现在的现象时进入了大中断，但是没有进入获取描述符的中断。
从网上找了一个基于标准库的HID，是可以正常使用的。但是st官方的damo也不能用。
有没有大佬可以指点一下。
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