【HC32F4A0开发板】电容触摸屏测试

TL-LED

【HC32F4A0开发板】电容触摸屏测试 [复制链接]

 

测试下显示屏的电容触摸屏。

 

一、硬件电路

电容触摸屏连接开发板上的I2C1接口。

二、程序部分

2.1、gt9xx驱动程序

I2C驱动程序在开发板的SDK包内已经写好了，这里我直接使用这个文件，文件的名称

2.2、测试程序

touch.c

#include "main.h"
#include "touch.h"

stc_touchpad_data_t m_stcTouchData;

/**
 * [url=home.php?mod=space&uid=159083]@brief[/url] Return true is the touchpad is pressed
 * @param  None
 * @retval Press state
 */
bool TOUCHPAD_IsPressed(void)
{
    uint8_t u8Tmp;
    uint8_t u8Status;
    bool bPressed = false;

    BSP_GT9XX_REG_Read(GT9XX_TOUCH_STATUS, &u8Status, 1UL);
    if ((u8Status & 0x80U) != 0U) {
        u8Tmp = 0U;
        BSP_GT9XX_REG_Write(GT9XX_TOUCH_STATUS, &u8Tmp, 1U);

        if ((0U < (u8Status & 0x0FU)) && ((u8Status & 0x0FU) < 6U)) {
            bPressed = true;
        }
    }

    return bPressed;
}

/**
 * @brief  Get touch data.
 * @param  [out] pstcData               Pointer to a [url=home.php?mod=space&uid=1064992]@ref[/url] stc_touchpad_data_t structure.
 * @retval None
 */
void TOUCHPAD_Read(stc_touchpad_data_t *pstcData)
{
    static uint16_t u16LastX = 0U;
    static uint16_t u16LastY = 0U;

    /*Save the pressed coordinates and the state*/
    if (TOUCHPAD_IsPressed()) {
        BSP_GT9XX_GetXY(GT9XX_POINT1, &u16LastX, &u16LastY);
        pstcData->enPointPress = SET;
    } else {
        pstcData->enPointPress = RESET;
    }

    /*Set the last pressed coordinates*/
    pstcData->stcPoint.u16X = u16LastX;
    pstcData->stcPoint.u16Y = u16LastY;
}

/**
 * @brief  Check if a point is on an window
 * @param  [in] pstcWin                 Pointer to a @ref stc_touchpad_window_t structure.
 * @param  [in] pstcPoint               Pointer to a @ref stc_touchpad_point_t structure.
 * @retval bool:
 *           - true:                    The point is in the area.
 *           - false:                   The point is out the area.
 */
bool TOUCHPAD_IsPointOn(const stc_touchpad_window_t *pstcWin, const stc_touchpad_point_t *pstcPoint)
{
    bool bIsPointOnWin = false;

    if((pstcPoint->u16X >= pstcWin->u16X1 && pstcPoint->u16X <= pstcWin->u16X2) && \
       (pstcPoint->u16Y >= pstcWin->u16Y1 && pstcPoint->u16Y <= pstcWin->u16Y2)) {
        bIsPointOnWin = true;
    }

    return bIsPointOnWin;
}


void init_touch(void)
{
	BSP_GT9XX_Init();
}

 

main.c

#include "main.h"
#include "lcd.h"
#include "sram.h"
#include "timer0.h"
#include "led.h"
#include "touch.h"

stc_touchpad_data_t touchdat;

int32_t main(void)
{
	uint16_t u=0;
	uint16_t cord[6]={WHITE, BLUE, BRED, GBLUE, RED, YELLOW};
	/* Register write enable for some required peripherals. */
	LL_PERIPH_WE(LL_PERIPH_GPIO | LL_PERIPH_FCG | LL_PERIPH_PWC_CLK_RMU | LL_PERIPH_EFM | LL_PERIPH_SRAM);

	BSP_CLK_Init();
	/* EXCLK 60MHz */
	CLK_SetClockDiv(CLK_BUS_EXCLK, CLK_EXCLK_DIV4);
	DDL_PrintfInit(BSP_PRINTF_DEVICE, BSP_PRINTF_BAUDRATE, BSP_PRINTF_Preinit);
	BSP_IO_Init();
	BSP_LED_Init();
	BSP_LCD_IO_Init();

	init_led();
	init_touch();
	init_lcd();
	init_sram();
	init_timer0();

	LL_PERIPH_WP(LL_PERIPH_GPIO | LL_PERIPH_FCG | LL_PERIPH_PWC_CLK_RMU | LL_PERIPH_EFM | LL_PERIPH_SRAM);
	POINT_COLOR=RED;       
	LCD_Clear(WHITE);
	//sram_test();
	
	
	for (;;) 
	{
		TOUCHPAD_Read(&touchdat);
		if (touchdat.enPointPress == SET)
		{
			DDL_Printf("x: %d, y: %d \r\n",touchdat.stcPoint.u16X,touchdat.stcPoint.u16Y );
		}
		
		DDL_DelayMS(50UL);
	}
}

 

三、测试结果

串口输出触摸时的坐标点

lugl4313820

示例有个触摸+定位一样的例子。

TL-LED

lugl4313820 发表于 2023-3-1 08:59 示例有个触摸+定位一样的例子。

是的，用的就是那个程序。

秦天qintian0303

支持几点触摸？                  

TL-LED

秦天qintian0303 发表于 2023-3-1 14:15 支持几点触摸？                  

GT9147支持是5点触摸，这里只用一个点测试。