This is a driver for the STMPE811 touchscreen driver on the STM32F429i-Discovery board. It uses the open source libopencm3 library. (https://github.com/libopencm3/libopencm3)
Basically just include stmpe811.h and stmpe811.c in your project, then use as follows:
if (stmpe811_init() != stmpe811_state_ok) { console_puts("STMPE811 Error!"); }
/* can select an orientation */ stmpe811_data.orientation = stmpe811_portrait_2;
console_puts("Press on touchscreen please!\n\n");
while (1) { if (stmpe811_read_touch(&stmpe811_data) == stmpe811_state_pressed) { do_pressed_action; } else { do_unpressed_action; } }
On state pressed one can use stmpe811_read_x and stmpe811_read_y to get the x-y coordinates. These will not be correct, one must calibrate the touchscreen for meaningful results.
the console_puts is from Chuck McMannis' console (https://github.com/libopencm3/libopencm3-examples/blob/master/examples/stm32/f4/stm32f429i-discovery/lcd-serial/console.c)