CAN通讯掩码与屏蔽
时间: 2023-09-04 22:14:11 浏览: 122
CAN通讯掩码与屏蔽是用于过滤CAN通讯中接收的报文的机制。通常使用掩码模式和列表模式来配置过滤器。
在列表模式下,可以将要接收的报文ID列成一个表,要求报文ID与列表中的某一个标识符完全相同才可以接收。而在掩码模式下,可以将可接收报文ID的某几位作为掩码,只要掩码与报文ID的对应位相同,即可接收该报文。
具体来说,在32位宽的列表模式下,FilterIdHigh与FilterIdLow一起用来存放一个CAN ID,FilterMaskIdHigh与FilterMaskIdLow用来存放另一个CAN ID。而在32位掩码模式下,CAN_FxR1(FilterIdHigh与FilterIdLow)用作32位宽的验证码,而CAN_FxR2(FilterMaskIdHigh与FilterMaskIdLow)则用作32位宽的屏蔽码。<em>1</em><em>2</em><em>3</em>
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