2024年7月5日 · You have an issue with filter config: .SlaveStartFilterBank parameter you have to configure it once and it determines the filter allocation for both CAN1 and CAN2.

2017年3月23日 · Every CAN message has an associated ID sent with its content. A receiver can decide on a hardware level which IDs to accept by using 27 so called filter banks which can implement either one 32-bit filter or two 16-bit filter.

2019年2月20日 · The filters filter 32 bits, so using ID filtering is hard especially for 11-bit standard ID because some other bits are filtered too. It's better to use masks, and mark those "extra bits" as "not compared".

2023年12月18日 · Hello, I have a set of extended CAN ID's I need to pas the bxCAN filter. I looked at some examples where one ID is passed the filter, but could not figure out how to allow a set of ID's. If my understanding is correct the mask is …

2019年8月8日 · bxCAN的过滤器就是采用上述第二种方法，你只需要设置好你感兴趣的那些CAN报文ID，那么MCU就只能收到这些CAN报文，是从 硬件 上过滤掉，完全不需要软件参与进来，从而节省了大大节省了MCU的时间，可以更加专注于其他事务，这个就是bxCAN过滤器的意义所在。 2.2. 两种过滤模式 (列表模式与掩码模式) 假设我们是bxCAN这个IP的设计者，现在由我 …

Filter for dedicated IDs: the filter can be configured to match for one or two specific identifiers. Classic bit mask filter: to match groups of identifiers by masking bits of a received identifier.

Here we will see how to communicate between two STM32 MCUs using the CAN protocol. Of course we would need 2 can transceivers (at least) to do that, and that’s why I am using MCP2551 can transceivers.

Most STM32 MCUs are equipped with one or more CAN peripherals. On a CAN bus every node can transmit messages at any times. On a busy CAN bus that can become an awful lot of messages. To lower the MCU cycles necessary to handle CAN, the CAN peripheral is equipped with 27 filter banks.

2023年6月11日 · In Order to reduce the CPU Load to filter out messages , the STM32 have the filters built inside the CAN peripheral. For recieving the data in STM32. datacheck = 1; you can use like...

A filter is essentially 64 bits of space that can be divided into 16 bit or 32 bit segments. CAN protocol allows for standard IDs (11 bit) and extended IDs (29 bit).