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hankes-garden / capacitive_screen

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About the amplitude_log file #2

Closed Qbart1337 closed 7 years ago

Qbart1337 commented 7 years ago

Hi Yang,

i know its a long time since you worked on this, but is got some questions which would push me. I got my set-up with i9100 as well. Right now ia about the recreate your app to read out the files too. But i cant get it how the logfile will be refreshed and why there are only 66 values in there. I tried to study the the atmel Datasheet to get more informations. Didnt help. The way i undertstood the documentations would be requiere to have 224 values. Am i wrong ?? :/

Stefan (Student, Germany)

hankes-garden commented 7 years ago

Hi, Stefan,

Thanks for being interested in this code. Here is some information may help you.

  1. How is the logfile refreshed?

In the screen driver (mxt224_u1.c), I implemented a delayed work queue, which will get the raw capacitance value and write to the logfile with a fix refresh rate(ref. get_raw_data() function).

  1. why are there only 66 values?

For the simplicy of test, I only print the first page of data (There are 4 pages in total), you can change it in the screen driver (ref. read_all_delta_data_ex() function in mxt224_u1.c)