The usage of CAN protocol analysis tool

Nowadays, a lot of car factories choose can bus as the communication bus, because can bus has the advantages of fast data transmission speed, strong anti-interference ability, and many node devices can be connected. Compared with other serial bus such as 232, it has incomparable advantages. Sometimes the control distance of some can bus application projects is relatively long, and can bus appears to be a little laborious, but this does not hinder our use of it. We can use optical fiber or Ethernet as the medium to extend its effective data transmission distance. It is precisely because of these advantages that it can be used in industrial production and automobile control, especially in automobile control.

 

As long as it's a modern car, whether you're a multi million luxury car or a tens of thousands of Yuan affordable car, can bus is the best helper you can use to control the whole car. As the car is a consumable, we will use it every day, so can bus will be aging and problems like other parts of the car. Because can bus is the key equipment which is responsible for the driver's command communication. Therefore, if can bus does not work or work slowly, it will cause serious traffic accidents. Who can take the responsibility?

Therefore, just as people will go to the hospital for treatment when they are ill, they also need to have an examination when they are free. The car can bus should also be frequently taken care of by the car owner. Check whether the equipment operates stably. If there is a problem, it must be eliminated in the first time. The equipment that can do this kind of work is the vehicle can protocol analysis tool, which can also be called the vehicle CAN Bus Analyzer. Next, let's talk about some problems that should be paid attention to when using CAN protocol analysis tools.

1. There are many different kinds of vehicle can protocol analysis tools. According to the different number of channels, they can be roughly divided into single channel vehicle can protocol analysis tools, dual channel vehicle can protocol analysis tools and multi-channel vehicle can protocol analysis tools. The more channels, the more powerful the function, but the inevitable volume and weight will also increase, it is not necessarily convenient to carry. Therefore, in addition to some special can bus detection projects, most of the can analysis tools can be completed by using single channel or dual channel vehicle can protocol analysis tools.

2. As mentioned in the first article, there are many kinds of vehicle can protocol analysis tools according to the number of can channels. Single channel or dual channel can protocol analysis tool can realize power supply through USB cable. The multi-channel can protocol analysis tool needs more power support because of its high power. So when we use these can protocol analysis tools, we must use external power supply.

3. When monitoring the can data of automobile, the general method is that a computer equipped with can data detection software connects a vehicle can protocol analysis tool, and the two sides are connected through USB cable. There are two connection methods between the vehicle can protocol analysis tool and the vehicle, which is determined by whether there is a gateway at the vehicle OBD interface. If the gateway is set at the OBD interface of the detected vehicle by the manufacturer, then we can not directly connect and send data through the vehicle can protocol analysis tool with OBD interface. The CAN protocol analysis tool with can interface must bypass the vehicle gateway and connect the internal can line directly, so as to realize the connection between the vehicle and the computer. In most cases, we use the second method. For example, usbcan II Pro automobile can protocol analysis tool of Shenyang Guangcheng technology has become the best tool for your work.