求助！STM32F105该怎么配置USB中断，做成读卡器，在电脑显示SD卡盘

如此甚好 · 发表于 2019-9-27 11:40:14

目的是想在电脑读出SD卡盘，SD卡没问题，现在的问题是不知道怎么设置这个USB中断了，这个代码是从103移植的，改了中断名称了，但还是不行，就是进不了中断，正常应该是一插上USB初始化完后会先进RX中断的

NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;

/* 2 bit for pre-emption priority, 2 bits for subpriority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

/* Configure the EXTI line 18 connected internally to the USB IP */
EXTI_ClearITPendingBit(EXTI_Line18);
   //  开启线18上的中断
EXTI_InitStructure.EXTI_Line = EXTI_Line18; // USB resume from suspend mode
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //line 18上事件上升降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

/* Enable the USB interrupt */
NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn; //组2，优先级次之
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

/* Enable the USB Wake-up interrupt */
NVIC_InitStructure.NVIC_IRQChannel = OTG_FS_WKUP_IRQn; //组2，优先级最高
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_Init(&NVIC_InitStructure);

void CAN1_RX0_IRQHandler(void)//CAN1接收中断服务函数 61us
{
   USB_Istr();
}

不知道对不对，求助