Here is the third post with some updated information to the Multiport protocol used in most of Sony's (photo) camera's since 2014.
This time I grabbed one of the data streams I priorly captured with my DSO and tried to find some patterns.
I started with the following data stream:
To start the analysis I tried to not take any priorly known knowledge for settled. The only properties of this data stream I took into account were:
- It must be a serial protocol!
- There should be a start bit for syncing.
- There must be some data bits (commonly 8)
- There could be a parity bit or no parity bit.
- There could be one to 'x' stop bits (regularly 1, 1.5 or 2 bits)
- Startbit as '0v' (low)
- 8 Databits
- some other bits (3 as you can see)
- Sony's multiport protocol is a serial protocol with two serial data lines (at A6000 camera: pin 8: UART_TX; pin 9: UART_RX)
- Serial speed is 9600 Baud
- Serial data setup is: 1 Start-Bit, 8 Data-Bits, 1 Parity-Bit (even), 2 Stop-Bits => 8E2