Changing to a different Touch Controller

Hi @Ebun.1​,

TouchGFX HAL interfaces with touch controllers through the TouchController interface. If you use the generator or start from an AT you will have a file called STM32TouchController.cpp. It contains a method sampleTouch() - Here's an example for the F746G-DISCO TouchController. Simply use your new driver to get the touch coordinates and assign x and y, return true or false depending on "touched" or not.

bool STM32TouchController::sampleTouch(int32_t& x, int32_t& y)
{
 /* Checking if the screen has been touched */
 
 if (tsDriver)
 {
 if (tsDriver->DetectTouch(TS_I2C_ADDRESS))
 {
 /* Get each touch coordinates */
 tsDriver->GetXY(TS_I2C_ADDRESS, (uint16_t*)&y, (uint16_t*)&x);
 return true;
 }
 }
 return false;
}

Here's the interface class with documentation:

/**
 * @fn virtual bool TouchController::sampleTouch(int32_t& x, int32_t& y) = 0;
 *
 * @brief Checks whether the touch screen is being touched, and if so, what coordinates.
 *
 * Checks whether the touch screen is being touched, and if so, what coordinates.
 *
 * @param [out] x The x position of the touch
 * @param [out] y The y position of the touch
 *
 * @return True if a touch has been detected, otherwise false.
 */
 virtual bool sampleTouch(int32_t& x, int32_t& y) = 0;