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在 C2000Ware 示例中的 CAN_readMessage 函数中、是否可以取消等待 BUSY 位清零、这段时间(while (HWREGH (BASE + CAN_O_IF2CMD)和 CAN_IF2CMD_BUSY)= CAN_IF2CMD_BUSY)))、因此不会延迟整个程序的执行?