【FL2416学习笔记】按键开发

 1 #define GPF_KEY_4            8
 2 #define GPF_KEY_4_INPUT     0x00
 3 #define GPF_KEY_4_OUTPUT    0x01
 4 
 5 #define GPF_KEY_3            6
 6 #define GPF_KEY_3_INPUT     0x00
 7 #define GPF_KEY_3_OUTPUT    0x01
 8 
 9 #define GPF_KEY_2            4
10 #define GPF_KEY_2_INPUT     0x00
11 #define GPF_KEY_2_OUTPUT    0x01
12 
13 #define GPF_KEY_0            0
14 #define GPF_KEY_0_INPUT     0x00
15 #define GPF_KEY_0_OUTPUT    0x01
16 
17 
18 #define KEY_PULL_DOWN    0x0
19 #define KEY_PULL_UP      0x1
20 
21 
22 #define GPFUP_KEY_0                    0
23 #define GPFUP_KEY_0_DISABLE            0x00
24 #define GPFUP_KEY_0_PULL_DOWN_ENABLE   0x01
25 #define GPFUP_KEY_0_PULL_UP_ENABLE     0x10
26 
27 #define GPFUP_KEY_2                    2
28 #define GPFUP_KEY_2_DISABLE            0x00
29 #define GPFUP_KEY_2_PULL_DOWN_ENABLE   0x01
30 #define GPFUP_KEY_2_PULL_UP_ENABLE     0x10
31 
32 #define GPFUP_KEY_3                    3
33 #define GPFUP_KEY_3_DISABLE            0x00
34 #define GPFUP_KEY_3_PULL_DOWN_ENABLE   0x01
35 #define GPFUP_KEY_3_PULL_UP_ENABLE     0x10
36 
37 #define GPFUP_KEY_4                    4
38 #define GPFUP_KEY_4_DISABLE            0x00
39 #define GPFUP_KEY_4_PULL_DOWN_ENABLE   0x01
40 #define GPFUP_KEY_4_PULL_UP_ENABLE     0x10
41 
42 /*
43 GPFDAT 保存当前按键的状态
44 */
45 #define GPFDAT_KEY_0             0
46 #define GPFDAT_KEY_2             2
47 #define GPFDAT_KEY_3             3
48 #define GPFDAT_KEY_4             4

1 #define GPFCON (*(volatile unsigned *)0x56000050) 
2 #define GPFDAT (*(volatile unsigned *)0x56000054) 
3 #define GPFUP  (*(volatile unsigned *)0x56000058)

1     GPFCON = (GPF_KEY_0_INPUT << GPF_KEY_0) | (GPF_KEY_2_INPUT << GPF_KEY_2) 
2             |(GPF_KEY_3_INPUT << GPF_KEY_3) | (GPF_KEY_4_INPUT << GPF_KEY_4) ;

1     GPFUP = ((GPFUP_KEY_0_PULL_DOWN_ENABLE | GPFUP_KEY_0_PULL_UP_ENABLE) << GPFUP_KEY_0) 
2            | ((GPFUP_KEY_2_PULL_DOWN_ENABLE | GPFUP_KEY_2_PULL_UP_ENABLE) << GPFUP_KEY_2) 
3            | ((GPFUP_KEY_3_PULL_DOWN_ENABLE | GPFUP_KEY_3_PULL_UP_ENABLE) << GPFUP_KEY_3) 
4            | ((GPFUP_KEY_4_PULL_DOWN_ENABLE | GPFUP_KEY_4_PULL_UP_ENABLE) << GPFUP_KEY_4) ;

 1 while (1)
 2     {
 3         if ( KEY_PULL_DOWN == ((GPFDAT >> GPFDAT_KEY_0 ) & 0x01) )
 4         {
 5             led_0_on();
 6         }
 7         else if ( KEY_PULL_DOWN == ((GPFDAT >> GPFDAT_KEY_2 ) & 0x01) )
 8         {
 9             led_1_on();
10         }
11         else if ( KEY_PULL_DOWN == ((GPFDAT >> GPFDAT_KEY_3 ) & 0x01) )
12         {
13             led_2_on();
14         }        
15         else if ( KEY_PULL_DOWN == ((GPFDAT >> GPFDAT_KEY_4 ) & 0x01) )
16         {
17             led_3_on();
18         }
19         else
20         {}        
21     }