I am trying to decode this signal coming from a control board for car ultrasound sensors. Segnal read with oscilloscope The first part of the signal seems to be a kind of sync frame. In the second part, instead, I should find the sensor id and the detected distance. The third part should be a reset.

I think it's encoded in PWM or Manchester encoding. Can anybody give me some more information?

UPDATE N.1: Opening the case, i found this board: Control Board It is driven by this microcontroller: UPD78F9222MC(T)-5A4-A - Microcontrollore 8 Bit, 78K0S/Kx, 10 MHz, 4 KB, 256 Byte, 20 Pin, SSOP. So trasmission should be UART or LIN (but i think that is UART).

I expect as payload some bits (min. 3) that can identify one of eight's sensor, and a float that rappresent distance.

  • 2
    $\begingroup$ Well, you could give more information. For example, how many bits of payload do you expect? $\endgroup$ – Marcus Müller Jul 11 '17 at 13:48
  • $\begingroup$ Don't you have the sensor's datasheet? It will tell you what type of communication protocol is implemented and therefore expected from the MCU that communicates with the sensor. $\endgroup$ – Fat32 Jul 11 '17 at 14:21
  • $\begingroup$ I made an update $\endgroup$ – tandrea Jul 13 '17 at 10:49

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.