We need to read the digital output from a Pressure sensor SPD100GD with an AVR micro (Atmega128). According to the datasheet we must estimate transmission speed. The datasheet is saying:
The transmission speed depends on the update rate and ranges up to 8 kHz. The software has to determine the digital output speed by the “Start Bit”.
This Start bit is 50% low and 50% high.
Based on this in formation the speed of the incoming data can be interpreted. The parity is defined as even meaning in case the number of 1’s in the word is even the parity is zero and in case the number is odd the parity bit is 1. Between the high and lower byte there is a stop bit, level 1, with the length of half the data cell (not drawn in picture).
So how we could estimate the transmission speed, and after that - is there any similar C or C++ Code for this kind of digital sensors.
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