Type of message
Add a transmission start tag, a chip selection (identification) tag and a control tag to the front of the original data segment, add a CRC check tag, a response tag and a transmission end tag to the end of the data, and pack these contents in a specific format Well, you can use one channel to express various signals. Various tags are like the signals on various channels in SPI, which play a role in coordinated transmission. When the entire data packet is transmitted to other devices, as long as these devices interpret the format according to the format, the original data can be restored. Such a message is called a CAN “data frame”.