用的
STM32cubemx 版本是 6.4.0， 配置了stm32h743的USB host ，想往外发数据，所以调用了
USBH_CDC_Transmit（），但是在这个函数里运行到第一个if下一步直接就跳到
HardFault_Handler了，不知道为什么
USBH_StatusTypeDef USBH_CDC_Transmit(USBH_HandleTypeDef *phost, uint8_t *pbuff, uint32_t length)
{
USBH_StatusTypeDef Status = USBH_BUSY;
CDC_HandleTypeDef *CDC_Handle = (CDC_HandleTypeDef *) phost->pAc
tiveClass->pData;
if ((CDC_Handle->state == CDC_IDLE_STATE) || (CDC_Handle->state == CDC_TRANSFER_DATA))
{
CDC_Handle->pTxData = pbuff;
CDC_Handle->TxDataLength = length;
CDC_Handle->state = CDC_TRANSFER_DATA;
CDC_Handle->data_tx_state = CDC_SEND_DATA;
Status = USBH_OK;
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_CLASS_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, phost->os_msg, 0U, NULL);
#endif
#endif
}
return Status;
}
举报
