標題: HC32F460單片機XPT2046觸摸程序 [打印本頁]
作者: 余金渠    時間: 2022-7-16 21:04
標題: HC32F460單片機XPT2046觸摸程序
中考結束，成績不錯重點高中，更新帖子。這次帶來的是觸摸的使用我用的是RTrobot 家的2.4寸帶觸摸屏幕(某一個寶找不到pdd有)，MCU是HC32F460kcta。飛點也解決的比較好具體的大家看代碼。

單片機xpt2046源程序如下
  1. #include "xpt2046.h"

  3. void XPT2046_init(void)
  4. {
  5.     stc_port_init_t stcPortInit;
  6.     /* configuration structure initialization */
  7.     MEM_ZERO_STRUCT(stcPortInit);

  9.     stcPortInit.enPinMode = Pin_Mode_Out;
  10.     stcPortInit.enExInt = Enable;
  11.     stcPortInit.enPullUp = Enable;

  13.     PORT_Init(XPT2046_PIN_PORT ,XPT2046_CS_PIN , &stcPortInit);
  14.     stcPortInit.enPinMode = Pin_Mode_In;
  15.     PORT_Init(XPT2046_PIN_PORT ,XPT2046_PEN_PIN , &stcPortInit);
  16.     PORT_Unlock();
  17.     M4_PORT->PSPCR  = 0x0Bu;
  18.     PORT_Lock();

  20.     XPT2046_CS_Set();
  21. }

  23. void send_8way(uint8_t data)
  24. {

  26.     while (Reset == SPI_GetFlag(SPI_UNIT, SpiFlagSpiIdle))
  27.     {}        
  28.     SPI_SendData8(SPI_UNIT,data);   
  29.     while (Reset == SPI_GetFlag(SPI_UNIT,SpiFlagReceiveBufferFull))
  30.     {}   
  31.     SPI_ReceiveData8(SPI_UNIT);   
  32. }

  34. uint8_t receiv_8way(void)
  35. {
  36.     while (Reset == SPI_GetFlag(SPI_UNIT, SpiFlagSpiIdle))
  37.     {}        
  38.     SPI_SendData8(SPI_UNIT,0x00);
  39.     while (Reset == SPI_GetFlag(SPI_UNIT,SpiFlagReceiveBufferFull))
  40.     {}
  41.     return SPI_ReceiveData8(SPI_UNIT);            
  42. }


  45. int cmp(const void *a, const void *b)
  46. {
  47.     return *(uint16_t *)a - *(uint16_t *)b; //從小到大排序（b-a則是從大到�。�。需要與被測類型一致，否則排序亂七八糟
  48. }

  50. static const uint8_t count = REPEATED_SAMPLING_TIMES; //采集次數(shù)
  51. u16 x_data[count], y_data[count];
  52. void XPT2046_Rd_Addata(uint16_t *rxdata,uint16_t *rydata)
  53. {
  54.     if(PORT_GetBit(XPT2046_PIN_PORT,XPT2046_PEN_PIN)==Reset)//觸摸按下了
  55.     {   
  56.     Ddl_Delay1ms(30);
  57.     if(PORT_GetBit(XPT2046_PIN_PORT,XPT2046_PEN_PIN)==Reset)
  58.     {
  59.     XPT2046_CS_Clr();
  60.     SPI_SetClockDiv(SPI_UNIT,SpiClkDiv32);
  61.     Ddl_Delay1us(10);
  62.     for (uint8_t i = 0; i < count; i++)
  63.     {
  64.         send_8way(0xd0); //發(fā)送命令
  65.         Ddl_Delay1us(8);
  66.         xdata = receiv_8way();
  67.         xdata <<= 8;
  68.         xdata |= receiv_8way();
  69.         xdata >>= 3;
  70.         x_data[i] = xdata & 0xFFF;

  72.         send_8way(0x90);
  73.         Ddl_Delay1us(8);
  74.         ydata = receiv_8way();
  75.         ydata <<= 8;        
  76.         ydata |= receiv_8way();
  77.         ydata >>= 3;
  78.         y_data[i] = ydata & 0xFFF;
  79.         Ddl_Delay1us(200);
  80.     }
  81.     qsort(x_data, count, sizeof(x_data[0]), cmp); //stdlib.h里的排序函數(shù)
  82.     qsort(y_data, count, sizeof(y_data[0]), cmp);
  83.     *rydata = x_data[count >> 1]; //取中間值,因為是橫屏所以XY是反的
  84.     *rxdata = y_data[count >> 1];
  85.     XPT2046_CS_Set();
  86.     }   
  87.     }
  88. }
  89. void Show_circle(u16 x,u16 y,u16 c)
  90. {
  91.     Draw_Circle(x,y,10,c);
  92.     LCD_DrawLine(x-10,y,x+10,y,c);
  93.     LCD_DrawLine(x,y-10,x,y+10,c);   
  94. }
  95. void Touch_Adjust(float32_t *xdata,float32_t *ydata)
  96. {
  97.     uint16_t x1_data,y1_data,x2_data,y2_data;
  98.     LCD_ShowString(0,200,"Please click on the red dot wait 5s",BLACK,WHITE,16,0);
  99.     Show_circle(10,10,RED);
  100.     Ddl_Delay1ms(3000);
  101.     XPT2046_Rd_Addata(&x1_data,&y1_data);   
  102.     Ddl_Delay1ms(2000);
  103.     LCD_ShowString(0,200,"Please click on the green dot wait 5s",BLACK,WHITE,16,0);
  104.     Show_circle(310,230,GREEN);
  105.     Ddl_Delay1ms(3000);
  106.     XPT2046_Rd_Addata(&x2_data,&y2_data);   
  107.     Ddl_Delay1ms(2000);
  108.     *xdata = (float32_t)(x2_data-x1_data)/(300);
  109.     *ydata = (float32_t)(y1_data-y2_data)/(220);

  111.    
  112.     LCD_Fill(0,0,320,240,WHITE);
  113.     LCD_ShowString(0,200,"You are good",BLACK,WHITE,16,0);
  114.    
  115. }

  117. void XPT2046_getPoint(u16 *x, u16 *y)
  118. {
  119.     uint16_t xdata=0,ydata=0;
  120.     XPT2046_Rd_Addata(&xdata,&ydata);
  121.     *x = (u16)xdata/11.1633329-15;//由于掃描方式的不同這里的參數(shù)需要根據(jù)實際修改.  
  122.     *y = (u16)ydata/-15.4863634+255;

  124. }

復制代碼

main
  1. #include "hc32_ddl.h"
  2. #include "Kthermocouple.h"
  3. #include "userADC.h"
  4. #include "userUSART.h"
  5. #include "userSPI.h"
  6. #include "userPWM.h"
  7. #include "ev_hc32f460_lqfp100_v2.h"
  8. #include "rtthread.h"
  9. #include "lcd.h"
  10. #include "xpt2046.h"

  12. static void touch_thread_init(void);
  13. static struct rt_thread touch_thread;
  14. ALIGN(RT_ALIGN_SIZE)
  15. static rt_uint8_t rt_touch_thread_stack[1024];
  16. static void touch_thread_entry(void * para);
  17. static rt_uint8_t touch_thread_priority = 6;


  20. /**
  21. *******************************************************************************
  22. ** \brief  Main function of template project
  23. **
  24. ** \param  None
  25. **
  26. ** \retval int32_t return value, if needed
  27. **
  28. ******************************************************************************/
  29. int32_t main(void)
  30. {
  31.         SPI1_Init();
  32.         XPT2046_init();
  33.         LCD_Init();               
  34.         LCD_Fill(0,0,320,240,WHITE);
  35.         Ddl_Delay1ms(1000);
  36.         touch_thread_init();
  37. }

  39. static void touch_thread_init(void)
  40. {
  41.         rt_thread_init(&touch_thread,
  42.                                         "touch_thread",
  43.                                         touch_thread_entry,
  44.                                         RT_NULL,
  45.                                         &rt_touch_thread_stack,
  46.                                         sizeof(rt_touch_thread_stack),
  47.                                         touch_thread_priority,
  48.                                         20);//時間 20ms
  49.         rt_thread_startup(&touch_thread);
  50. }

  52. static void touch_thread_entry(void * para)
  53. {
  54.         u16 tx=0,ty=0;
  55.     DDL_Printf("touch_thread_runing. \r\n");
  56.     while(1)
  57.     {
  58.                 if(PORT_GetBit(XPT2046_PIN_PORT,XPT2046_PEN_PIN)==Reset)
  59.                 {
  60.                 XPT2046_getPoint(&tx,&ty);
  61.                 LCD_Fill(tx-2,ty-2,tx+2,ty+2,RED);
  62.                 }
  63.        
  64.     }
  65. }


復制代碼


Keil代碼下載:
HC32F460TOUCH工程.7z (2.8 MB, 下載次數(shù): 33)






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