STM32L4R9I_EVAL BSP User Manual: stm32l4r9i_eval_rgb_ts.c File Reference

This file provides a set of functions needed to manage the Touch Screen on STM32746G-Discovery board.

Author:

MCD Application Team

   1. How To use this driver:
   --------------------------
      - This driver is used to drive the touch screen module of the STM32L4R9I_EVAL
        board on the RK043FN48H-CT672B 480x272 LCD screen with capacitive touch screen.
      - The FT5336 component driver must be included in project files according to
        the touch screen driver present on this board.

   2. Driver description:
   ---------------------
     + Initialization steps:
        o Initialize the TS module using the BSP_RGB_TS_Init() function. This
          function includes the MSP layer hardware resources initialization and the
          communication layer configuration to start the TS use. The LCD size properties
          (x and y) are passed as parameters.
        o If TS interrupt mode is desired, you must configure the TS interrupt mode
          by calling the function BSP_RGB_TS_ITConfig(). The TS interrupt mode is generated
          as an external interrupt whenever a touch is detected.
          The interrupt mode internally uses the IO functionalities driver driven by
          the IO expander, to configure the IT line.

     + Touch screen use
        o The touch screen state is captured whenever the function BSP_RGB_TS_GetState() is
          used. This function returns information about the last LCD touch occurred
          in the TS_StateTypeDef structure.
        o If TS interrupt mode is used, the function BSP_RGB_TS_ITGetStatus() is needed to get
          the interrupt status. To clear the IT pending bits, you should call the
          function BSP_RGB_TS_ITClear().
        o The IT is handled using the corresponding external interrupt IRQ handler,
          the user IT callback treatment is implemented on the same external interrupt
          callback.
  

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Definition in file stm32l4r9i_eval_rgb_ts.c.