外设capsense的简单调用
1.熟悉外设capsense的简单使用，使用到了两个button，一个5元素的slide，
Cypress提供算法供调用检测外设capsense。
2.jtag编程将micro-usb连接在板子的J1口上
3.结果如图所示
4.* Hardware connection on the Kit
* Slider - P5[0] - P5[4]
* Button1 - P5[5]
* Button2 - P5[6]
* LCD 2[0-6]
5.示例代码
1 #include <device.h>
2
3 /* Define constants for capsense button and slider */
4 #define ON (1)
5 #define OFF (0)
6 #define NO_FINGER (0xFF)
7
8 void main()
9 {
10 uint8 statusButton0 = OFF;
11 uint8 statusButton1 = OFF;
12 uint16 sliderPosition = NO_FINGER;
13 uint16 lastPosition = NO_FINGER;
14
15 CYGlobalIntEnable;
16
17 LCD_Start();
18 LCD_Position(0,0);
19 LCD_PrintString("Btn0 Btn1 Slider");
20
21 /* Start capsense and initialize baselines and enable scan */
22 CapSense_Start();
23 CapSense_InitializeAllBaselines();
24 CapSense_ScanEnabledWidgets();
25
26 while(1)
27 {
28 /* If scanning is completed update the baseline count and check if sensor is active */
29 if(!CapSense_IsBusy())
30 {
31 /* Update baseline for all the sensors */
32 CapSense_UpdateEnabledBaselines();
33 CapSense_ScanEnabledWidgets();
34
35 /* Test if button widget is active */
36 statusButton0 = CapSense_CheckIsWidgetActive(CapSense_BUTTON0__BTN);
37 statusButton1 = CapSense_CheckIsWidgetActive(CapSense_BUTTON1__BTN);
38 sliderPosition =(uint8)CapSense_GetCentroidPos(CapSense_LINEARSLIDER0__LS);
39
40 /* Display button 1 status on LCD */
41 LCD_Position(1,0);
42 if( statusButton0 == ON )
43 {
44 LCD_PrintString("On ");
45 }
46 else
47 {
48 LCD_PrintString("Off");
49 }
50
51 /* Display button 1 status on LCD */
52 LCD_Position(1,5);
53 if( statusButton1 == ON )
54 {
55 LCD_PrintString("On ");
56 }
57 else
58 {
59 LCD_PrintString("Off");
60 }
61
62
63 LCD_Position(1,10);
64
65 if(sliderPosition == NO_FINGER)
66 {
67 LCD_PrintString("----");
68 }
69
70 /* Finger detected on the slider */
71 else
72 {
73 /* If finger position on the slider is changed then update the LCD */
74 if(sliderPosition != lastPosition)
75 {
76 LCD_Position(1,10);
77 LCD_PrintString(" ");
78 LCD_Position(1,10);
79 LCD_PrintNumber(sliderPosition);
80 LCD_PutChar('%');
81 lastPosition = sliderPosition;
82 }
83 }
84 }
85 }
86 }
87
88 /* [] END OF FILE */
