stm32746g_discovery_ts.c File Reference

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

#include "stm32746g_discovery_ts.h"

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Functions
uint8_t	BSP_TS_Init (uint16_t ts_SizeX, uint16_t ts_SizeY)
	Initializes and configures the touch screen functionalities and configures all necessary hardware resources (GPIOs, I2C, clocks..).
uint8_t	BSP_TS_DeInit (void)
	DeInitializes the TouchScreen.
uint8_t	BSP_TS_ITConfig (void)
	Configures and enables the touch screen interrupts.
uint8_t	BSP_TS_ITGetStatus (void)
	Gets the touch screen interrupt status.
uint8_t	BSP_TS_GetState (TS_StateTypeDef *TS_State)
	Returns status and positions of the touch screen.
uint8_t	BSP_TS_Get_GestureId (TS_StateTypeDef *TS_State)
	Update gesture Id following a touch detected.
void	BSP_TS_ITClear (void)
	Clears all touch screen interrupts.
uint8_t	BSP_TS_ResetTouchData (TS_StateTypeDef *TS_State)
	Function used to reset all touch data before a new acquisition of touch information.
Variables
static TS_DrvTypeDef *	tsDriver
static uint16_t	tsXBoundary
static uint16_t	tsYBoundary
static uint8_t	tsOrientation
static uint8_t	I2cAddress

---

Detailed Description

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

Author:

MCD Application Team

Version:

V2.0.0

Date:

30-December-2016

   1. How To use this driver:
   --------------------------
      - This driver is used to drive the touch screen module of the STM32746G-Discovery
        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_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_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_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_TS_ITGetStatus() is needed to get
          the interrupt status. To clear the IT pending bits, you should call the 
          function BSP_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 stm32746g_discovery_ts.c.