Hello,
For the multiple physical buttons implementation, you need to create a custom ButtonController class. Here is an example :
STM32ButtonController.cpp
#include <STM32ButtonController.hpp>
extern "C"
{
#include "main.h"
}
void STM32ButtonController::init()
{
/**
* Initialize button controller and driver
*
*/
previousState = 0;
}
bool STM32ButtonController::sample(uint8_t& key)
{
uint8_t state = getKeyState();
if (state == previousState)
{
return false;
}
previousState = state;
if (state != 0)
{
key = state;
return true;
}
return false;
}
uint8_t STM32ButtonController::getKeyState(void)
{
if (HAL_GPIO_ReadPin(BUTTON_CENTER_GPIO_Port, BUTTON_CENTER_Pin) == GPIO_PIN_RESET)
return '5';
if (HAL_GPIO_ReadPin(BUTTON_CENTER_GPIO_Port, BUTTON_LEFT_Pin) == GPIO_PIN_RESET)
return '4';
if (HAL_GPIO_ReadPin(BUTTON_CENTER_GPIO_Port, BUTTON_RIGHT_Pin) == GPIO_PIN_RESET)
return '6';
if (HAL_GPIO_ReadPin(BUTTON_CENTER_GPIO_Port, BUTTON_UP_Pin) == GPIO_PIN_RESET)
return '8';
if (HAL_GPIO_ReadPin(BUTTON_CENTER_GPIO_Port, BUTTON_DOWN_Pin) == GPIO_PIN_RESET)
return '2';
return 0;
}
STM32ButtonController.hpp
#ifndef STM32BUTTONCONTROLLER_HPP
#define STM32BUTTONCONTROLLER_HPP
#include <platform/driver/button/ButtonController.hpp>
/**
* @class STM32ButtonController
*
* @brief This class specializes ButtonController Interface.
*
* @sa touchgfx::ButtonController
*/
class STM32ButtonController : public touchgfx::ButtonController
{
public:
STM32ButtonController() {}
/**
* @fn virtual void STM32ButtonController::init() = 0;
*
* @brief Initializes button controller.
*
* Initializes button controller.
*/
virtual void init();
/**
* @fn virtual bool STM32ButtonController::sample(uint8_t& key);
*
* @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] key The index of the key pressed
*
* @return True if a button has been pressed, otherwise false.
*/
virtual bool sample(uint8_t& key);
private:
uint8_t getKeyState(void);
uint8_t previousState;
};
#endif
Then you have to tell TouchGFX to use it. For this you write the following in TouchGFXHAL.cpp
#include <STM32ButtonController.hpp>
//...
static STM32ButtonController bc;
//...
void TouchGFXHAL::initialize()
{
/* Initialize TouchGFX Engine */
TouchGFXGeneratedHAL::initialize();
setButtonController(&bc);
}
As for the creation of a keypad in the UI, you can get inspiration from the example Keyboard Example available in TouchGFX Designer.
The main files you would need to change are :
- KeyboardLayout.hpp
- KeyboardKeyMapping.hpp
- CustomKeyboard.hpp/.cpp
/Alexandre
