I'm attempting to set up a program which reads data in from one analog pin of the Arduino at 1 kHz, then saves and processes this data. I'm using a producer/consumer architecture to separate the processing from the reading, passing data via a queue. Arduino commands being used are Init (outside the loop), Continuous Acquisition On (outside the loop, set for pin 0 and sampling rate 1000) and Acquire Continuous Sample (inside the loop, set for sampling rate 1000, and I've tried this with it grabbing 10 samples or 1 sample at a time), and Close (outside the loop).
My issue is that if I time the read loop (which should be running as fast as the data is coming on the serial port; there is no wait and I've done this with all other functions removed from the loop) with a numeric counter and my real-world stopwatch, the samples appear to be coming much slower than 1 kHz (somewhere between 500 and 900 Hz depending on settings). I could try to scale up the speed until I get the speed I'd like, but I felt like there was probably a better answer. Can anyone give an explanation?
In attempting to debug this, I put an error-out indicator on the Arduino commands and saw error code 1073676294. The only documentation I saw on this pointed me towards Digital I/O pins, but I am not using any digital pins. I'm a newbie when it comes to data acquisition but am not afraid of learning. Any advice from those more experienced is appreciated.
