stm32756g_eval_ts.c File Reference

This file provides a set of functions needed to manage the Touch Screen on STM32756G-EVAL and STM32746G-EVAL evaluation boards. More...

#include "stm32756g_eval_ts.h" #include "stm32756g_eval_io.h"

Go to the source code of this file.

Functions
uint8_t	BSP_TS_Init (uint16_t xSize, uint16_t ySize)
	Initializes and configures the touch screen functionalities and configures all necessary hardware resources (GPIOs, 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.
void	BSP_TS_ITClear (void)
	Clears all touch screen interrupts.
Variables
static TS_DrvTypeDef *	tsDriver
static uint16_t	tsXBoundary
static uint16_t	tsYBoundary
static uint8_t	tsOrientation
static uint8_t	I2cAddress

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Detailed Description

This file provides a set of functions needed to manage the Touch Screen on STM32756G-EVAL and STM32746G-EVAL evaluation boards.

Author:

MCD Application Team

Version:

V1.0.0

Date:

22-May-2015

  How To use this driver:
  -----------------------
   - This driver is used to drive the touch screen module of the STM32756G-EVAL
     evaluation board on the AMPIRE 640x480 LCD mounted on MB1063 or AMPIRE 
     480x272 LCD mounted on MB1046 daughter board.
   - If the AMPIRE 640x480 LCD is used, the TS3510 or EXC7200 component driver
     must be included according to the touch screen driver present on this board.
   - If the AMPIRE 480x272 LCD is used, the STMPE811 IO expander device component 
     driver must be included in order to run the TS module commanded by the IO 
     expander device, the MFXSTM32L152 IO expander device component driver must be
     also included in case of interrupt mode use of the TS.

  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 stm32756g_eval_ts.c.