First, let’s take a look at the frame structure of CAN: CAN Frame Structure From the above image, we can see that in the standard frame, there is an r0 bit, which is actually a reserved bit. ISO11898-1 stipulates that the sender sends the r0 bit as dominant, while the receiver does not judge the … Read more
4. Short Circuit of CAN L to Ground When a short circuit occurs between CAN L and ground, due to the fault tolerance characteristics of the CAN bus, the entire CAN network may be unable to communicate or generate related fault codes. However, for certain vehicle models, such as Haima, the fault tolerance characteristics of … Read more
Education | Reading | Life | Growth Written by Chen Deyong In the previous section, we discussed the 7 groups of modal verbs that are essential for middle school English. In this article, we will delve deeper into the usage of these modal verbs.Today, let’s first take a look at the usage of the most … Read more
1）Generally speaking: may means being allowed to do something, while can means having the ability to do something. He can swim the channel. He can swim across the strait. Children may swim in the pool only when there is a lifeguard present. Children can only swim in the pool when a lifeguard is present. However, … Read more
Before performing CAN bus communication, it is important to ensure proper bus configuration, such as termination resistors. They are crucial components that affect bus communication. Below, we will analyze the effects of not using termination resistors solely from the perspective of signal amplitude and time constant, without considering signal integrity. Termination Resistor Requirements According to … Read more
To begin with, let’s recall what the normal operating voltages of CAN_H and CAN_L are. When there are issues with the CAN bus, it is often accompanied by various faults, such as abnormal dashboard displays, the vehicle failing to start, or failing to turn off after starting, etc. We will mainly introduce the 8 common … Read more
The modal verb can is frequently used in English, and its main usages and points of focus include: 1. Expressing Ability In this case, can means “to be able to”. In negative sentences, simply add not after can, and in interrogative sentences, move can to the beginning of the sentence. For example: Affirmative: She can … Read more
Modal Verbs Usage of Can and Could 1. Indicates ability or objective possibility, and can also express requests and permission. Can you finish this work tonight? Man cannot live without air. — Can I go now? — Yes, you can. Note: Could can also express requests, with a more polite tone, mainly used in questions, … Read more
As people’s demands for automotive safety, comfort, exhaust emissions, and fuel economy become increasingly stringent, the amount of information exchanged between control units is growing, and the number of sensors and wires is rapidly increasing, making it more difficult to troubleshoot and repair. To ensure that the electronic systems in vehicles remain operational without taking … Read more
CAN Protocol Message 1. Types of Frames Communication is conducted through the following 5 types of frames. ● Data Frame ● Remote Frame ● Error Frame ● Overload Frame ● Frame Interval In addition, the data frame and remote frame have both standard and extended formats. The standard format has11 bits identifier (Identifier: hereinafter referred … Read more