我是用CAN1中断进行接收信息，在ch32v30x_it.c中添加了中断声明
void CAN1_RX1_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void CAN1_RX1_IRQHandler(void)
{
CAN_IRQHandler(CAN1);
}
也对中断函数进行了中断优先级配置，但是依然接收不到CAN数据，并且调试的时候，发现没有执行CAN_IRQHandler(CAN1);函数
NVIC_InitTypeDef NVIC_InitStructure={0};
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
CAN_ITConfig(CAN1, CAN_IT_FMP0 | CAN_IT_FMP1, ENABLE); //开启CAN1的接收中断
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