The development of digital oscilloscopes greatly reduces the difficulty of low-speed bus debugging. Whether it is IIC, SPI or CAN, LIN, etc., oscilloscopes can directly convert waveforms into data. It is rumored that an oscilloscope can directly crack more than 30 communication protocols, specifically those protocols? Let's take a look. Before talking about the specific decoding content of the oscilloscope, let's first look at the changes in protocol decoding along with the development of the oscilloscope. The development of oscilloscopes from analog oscilloscopes to digital oscilloscopes has brought about many major changes, such as signal acquisition, bandwidth, sample rate, and display. Similarly, such changes are also reflected in the "protocol decoding", the new decoding method will liberate people from the world of "0", "1", greatly improving the efficiency of work. Figure 1 0/1 of the world Below, we take a look at the changes in the protocol decoding method in the development of oscilloscopes. · Initial protocol decoding The original oscilloscope was just a simple waveform display and data measurement, and we needed to get the deeper meaning of the protocol waveform, which would take a while to analyze. For example: observe the IIC protocol, a clock signal, a data signal, we need to match the clock and the data signal one bit, to perform the combined conversion of 0/1, "translate" it into the form we need, and then correspond to the corresponding Physical quantity. This is not only a lot of work, low efficiency, but also easy to make mistakes. figure 2 · Current protocol decoding The waveform data is directly decoded and displayed in hexadecimal, decimal or character form, which saves the process of engineer conversion and greatly accelerates the development efficiency. Figure 3 shows the decoding of a CAN protocol, which can be used in one step. Figure 3 CAN protocol decoding under dual ZOOM At present, on the oscilloscope, in addition to the well-known CAN, UART, IIC, USB and other protocol decoding, there are many protocols that are used more and more frequently. Below, we introduce the application according to the agreement. 1 Automotive Electronics Related Agreement Table 1 Automotive electronics related agreements and characteristics Figure 4 shows the WTB protocol decoding. Figure 4 WTB protocol decoding under dual ZOOM 2 IC interface related agreement Table 2 IC interface related protocols and features Figure 5 shows the SPI protocol decoding. Figure 5 SPI protocol decoding 3 computer peripheral related agreements Table 3 Protocol-level characteristics of computer peripherals Figure 6 shows the USB protocol decoding. Figure 6 USB protocol decoding under dual ZOOM 4 Wireless communication related protocols Table 4 Wireless communication related protocols and features Figure 7 shows the Wiegand protocol decoding. Figure 7 Wiegand protocol decoding 5 Relevant agreements in various industries Table 5 Relevant agreements and characteristics of various industries Figure 8 shows the RS232 decoding: Figure 8 RS232 decoding under dual ZOOM Table 6 Relevant agreements and characteristics of various industries 3, ZDS4000 all protocol decoding all free standard ZDS4000 series oscilloscopes are equipped with more than 30 kinds of protocol decodings free of charge. Supporting decoding is displayed in three ways: “decimalâ€, “hexadecimal†and “characterâ€, as shown in Figures 9 and 10. Figure 9 More than 30 protocol decoding Figure 10 Three display modes of protocol decoding At the same time, it supports decoding detail display, with detailed event table (the event table content includes start time, end time, name and data), which can be exported in report webpage or CSV format, which is convenient for engineers to further analyze, as shown in Figure 11. Figure 11 Two ways to export the event table SHENZHEN CHONDEKUAI TECHNOLOGY CO.LTD , https://www.szsiheyi.com
