Today oneself check the I2C data on the board with the oscilloscope collected a I2C oscillogram, acquisition of sda respectively, CLK pin, oscilloscope display graphics seems to be two pin signal, control the online information figure dared analysis about pictures left the START of the first half, address, read and write, feedback, (also not sure exactly right), due to the discontinuous signal acquisition process (automated test "in the process of continuous switch signal acquisition) figure in waveform and data, so can't in gourd painting gourd ladle,


Below half part of the size of the black box after the analysis of the signal and a great god help in! ? The little black box is waiting for the bus or because the test signal interrupt? The whole period of wave can also sums up the valuable numerical? For example, the voltage, frequency, their calculated communication rate is 400 k? I oscilloscope, I2C rookie! Fall of I2C,,,

CodePudding user response:

Buy a logic analyzer is much cheaper than the oscilloscope, do the most professional,, and there are dozens of agreement for automatic analysis, choose the agreement can, as long as the software,

CodePudding user response:

Feel like is in a state of continuous, speaking, reading and writing, you look at the I2C communication process, or you see the I2C devices of the specifications of the book to look to go, I remember that there is continuous I2C write mode,

CodePudding user response:

Like a read command, read the address at the back of the device