Today I would like to present you with the latest firmware changes for AMC. The difference is so big that I thought it makes a nice piece for the news page.
I was hopping to fix the really noisy ADC function for several years, and I finally got it. Now it follows closely the potentiometer and the measurements are not affected by motor power noise or other parasitic noise from environment.
To achieve that noise reduction I made my own routine to access directly the ADC registers and handle their sampling timing with a interrupt. This gave me a great deal of freedom to make the sampling time of each channel as fast as 7us (microseconds) or 0.000007sec. Just for comparison, before was 250us using standard library code.
This allowed me to also increase the program cycle speed up to 9000 times (when not receiving), and up to 7000 times per second when receiving data from the computer.
See the comparison video and the timing diagrams below:
AMC1.6 firmware 1.1h timings1.png (61.21 KiB) Viewed 12041 times
AMC1.6 firmware 1.1h timings2.png (60.53 KiB) Viewed 12041 times
AMC1.6 firmware 1.1h timings3.png (54.25 KiB) Viewed 12041 times
There is a big slider panel in the extractor as a test plugin to simulate input values without a game is running. With this panel you can simulate all the input values that are normally sended by a game. A auto movement option will move the sliders slowly or fast from the maximum to the minimum value. Use this sawtooth wave and control your simulator to its maximum positions. With this slider you can for example test the feedback delay, the difference between input values and simulator position in time. You can enable this panel if you open the motion driver and select the plugin driver. There you can enable in the middle box the test panel. It will popup if you have selected it in the list (left round selection).
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