CODEWITHSUNDEEP
linuxqtembeddedarmlinux-device-driver
beaver
beaver

Reputation: 570

What is the dataflow of using touchscreen with tslib?

I don't understand how tslib works. Let's say I have a serial touchscreen, in my understanding the data flows in the following way: ts press -> serial port -> ts driver -> tslib -> device file (like /dev/input/eventX) Is it right? Or do I need to insert some code between ts driver and tslib so that they can communicate?

Upvotes: 2

Views: 2017

Answers (1)

Chris McHarg
Chris McHarg

Reputation: 116

Tslib does not operate between the touch screen driver and the input device file - it accesses the device file on behalf of the application using it. The key data flow when using tslib is device file -> tslib -> application.

The application specifies the input device file (of the touch device) tslib should use with the ts_open() function and then uses other tslib functions to obtain the touch samples.

The tslib API is defined in tslib.h and there's a number of usage examples in the source under tests including the simple ts_print.c.

Upvotes: 4

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