问题
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?
回答1:
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.
来源：https://stackoverflow.com/questions/14351399/what-is-the-dataflow-of-using-touchscreen-with-tslib