GUI_GetKey() and BUTTON_IsPressed() behavior

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  • GUI_GetKey() and BUTTON_IsPressed() behavior

    Hi all I am experimenting for a new applications.
    I wrote a simple application to test the hardware it only displays a button and triggers an event if pressed.

    Touch screen controller is the AD7846 and its routines are implemented in GUI_X_Touch.c returning ADC readings in MEASURE_X and MEASURE_Y functions.

    GUI_TOUCH_Exec(); is polled in an interrupt routing that fires every 20mS (GPIO toggle is for debug...)

    C Source Code

    1. void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
    3. if (htim->Instance == TIM6){
    4. GUI_TOUCH_Exec();
    5. HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
    6. }
    7. }


    than this is the main function (only relevant part shown).
    Well: if to check the button pressing I use if(BUTTON_IsPressed(hButton) == 1) the program works, if, like in many example I use (GUI_GetKey() == GUI_ID_BUTTON0) the program got stuck and also the interrupt routine does not fire anymore (no led toggle). You can only reset the MCU.

    What I can see with the debugger is that the GUI_GetKey() function never returns true. BTW the program never arise a fault exception, so I cannot explain the ISR lockup.

    Any advice? :)

    Many thanks.



    C Source Code

    1. int main(void)
    2. {
    5. HAL_Init();
    8. SystemClock_Config();
    11. MX_GPIO_Init();
    12. MX_I2C2_Init();
    13. MX_CRC_Init();
    14. MX_FSMC_Init();
    15. MX_SPI1_Init();
    16. MX_RTC_Init();
    17. MX_TIM6_Init();
    19. GUI_Init();
    20. HAL_TIM_Base_Start_IT(&htim6);
    22. CALIBRATION_Check();
    24. GUI_SetBkColor(GUI_BLACK);
    25. GUI_Clear();
    27. hButton = BUTTON_CreateEx(110,110,100,40,0,WM_CF_SHOW,0, GUI_ID_BUTTON0);
    28. BUTTON_SetText(hButton, "Click me...");
    30. GUI_Exec();
    32. while (1) {
    34. if (BUTTON_IsPressed(hButton)) {
    36. BUTTON_Delete(hButton);
    37. GUI_ClearRect(0,0,479,271);
    38. GUI_SetColor(GUI_RED);
    39. GUI_DispStringAt("CIAO", 16, 16);
    43. break;
    44. }
    45. GUI_Delay(10);
    46. while(1){}
    48. }
    Display All