First, you need to write a led_test.c file, according to the source frameworks, in led_test.c we can see only led.c. We can not see the led_controller.c. For example, in led_test.c it is necessary to use the function led_controller.c, the need for the function led_controller.c encapsulated in led.c.
Lcd how to use it, diagram is as follows:
Adhering to the above ideas, so there is the following code.
led_test.c
. 1 void lcd_test ( void )
2 {
. 3 unsigned int fb_base;
. 4 int XRES, yres, BPP;
. 5 int X, Y;
. 6 unsigned Short * P;
. 7 unsigned int * P2;
. 8
. 9 / * initialize the LCD * /
10 lcd_init ( );
. 11
12 is / * enable LCD * /
13 is lcd_enable ();
14
15 / * parameters obtained an LCD: fb_base, XRES, yres, BPP * /
16 get_lcd_params (& fb_base, & XRES, & yres, & BPP);
. 17
18 is / * to framebuffer write data * /
. 19 IF (BPP == 16 )
20 is {
21 is / * make the LCD output of the entire screen red * /
22 is
23 is / * 565: 0xF800 * /
24
25 P = (unsigned Short * ) fb_base;
26 is for (X = 0 ; X <XRES; X ++ )
27 for (Y = 0 ; Y <yres; Y ++ )
28 * = P ++0xf800;
29
30 /* green */
31 p = (unsigned short *)fb_base;
32 for (x = 0; x < xres; x++)
33 for (y = 0; y < yres; y++)
34 *p++ = 0x7e0;
35
36 /* blue */
37 p = (unsigned short *)fb_base;
38 for (x = 0; x < xres; x++)
39 for(y = 0 ; y <yres; and ++ )
40 * p ++ = 0x1f ;
41
42 } 66 }
led.c
1 #include "lcd.h"
2 #include "lcd_controller.h"
3
4 #define LCD_NUM 10
5
6 static p_lcd_params p_array_lcd[LCD_NUM];
7 static p_lcd_params g_p_lcd_selected;
8
9 int register_lcd(p_lcd_params plcd)
10 {
11 int i;
12 for (i = 0; i < LCD_NUM; i++)
13 {
14 if (!p_array_lcd[i])
15 {
16 p_array_lcd[i] = plcd;
17 return i;
18 }
19 }
20 return -1;
21 }
22
23 int select_lcd(char *name)
24 {
25 int i;
26 for (i = 0; i < LCD_NUM; i++)
27 {
28 if (p_array_lcd[i] && !strcmp(p_array_lcd[i]->name, name))
29 {
30 g_p_lcd_selected = p_array_lcd[i];
31 return i;
32 }
33 }
34 return -1;
35 }
36
37 void get_lcd_params(unsigned int *fb_base, int *xres, int *yres, int *bpp)
38 {
39 *fb_base = g_p_lcd_selected->fb_base;
40 *xres = g_p_lcd_selected->xres;
41 *yres = g_p_lcd_selected->yres;
42 *bpp = g_p_lcd_selected->bpp;
43 }
44
45 void lcd_enable(void)
46 {
47 lcd_controller_enable();
48 }
49
50 void lcd_disable(void)
51 {
52 lcd_controller_disable();
53 }
54
55 int lcd_init(void)
56 {
57 /* 注册LCD */
58 lcd_4_3_add();
59
60 /* 注册LCD控制器 */
61 lcd_contoller_add();
62
63 /* 选择某款LCD */
64 select_lcd("lcd_4.3");
65
66 /* 选择某款LCD控制器 */
67 select_lcd_controller("s3c2440");
68
69 /* 使用LCD的参数, 初始化LCD控制器 */
70 lcd_controller_init(g_p_lcd_selected);
71 }
lcd_controller.c
1 #include "lcd_controller.h"
2
3 #define LCD_CONTROLLER_NUM 10
4
5 static p_lcd_controller p_array_lcd_controller[LCD_CONTROLLER_NUM];
6 static p_lcd_controller g_p_lcd_controller_selected;
7
8 int register_lcd_controller(p_lcd_controller plcdcon)
9 {
10 int i;
11 for (i = 0; i < LCD_CONTROLLER_NUM; i++)
12 {
13 if (!p_array_lcd_controller[i])
14 {
15 p_array_lcd_controller[i] = plcdcon;
16 return i;
17 }
18 }
19 return -1;
20 }
21
22 int select_lcd_controller(char *name)
23 {
24 int i;
25 for (i = 0; i < LCD_CONTROLLER_NUM; i++)
26 {
27 if (p_array_lcd_controller[i] && !strcmp(p_array_lcd_controller[i]->name, name))
28 {
29 g_p_lcd_controller_selected = p_array_lcd_controller[i];
30 return i;
31 }
32 }
33 return -1;
34 }
35
36
37 /* 向上: 接收不同LCD的参数
38 * 向下: 使用这些参数设置对应的LCD控制器
39 */
40
41 int lcd_controller_init(p_lcd_params plcdparams)
42 {
43 /* 调用所选择的LCD控制器的初始化函数 */
44 if (g_p_lcd_controller_selected)
45 {
46 g_p_lcd_controller_selected->init(plcdparams);
47 return 0;
48 }
49 return -1;
50 }
51
52 void lcd_controller_enable(void)
53 {
54 if (g_p_lcd_controller_selected)
55 {
56 g_p_lcd_controller_selected->enable();
57 }
58 }
59
60 void lcd_controller_disable(void)
61 {
62 if (g_p_lcd_controller_selected)
63 {
64 g_p_lcd_controller_selected->disable();
65 }
66 }
67
68
69 void lcd_contoller_add(void)
70 {
71 s3c2440_lcd_contoller_add();
72 }