嵌入式LED灯显示

1、2014-2015学年第1学期嵌入式操作系统课程设计报告【设计题目】矩阵LED字符显示控制系统设计【设计目的】1掌握无操作系统下的硬件软件设计原理和方法；2进一步熟悉ARM 处理器的基本结构、指令集、存储系统以及基本接口编程；3熟悉嵌入式系统各部件的硬件初始化过程以及基本IO控制方法。4掌握矩阵LED 的应用原理【设计内容】1利用sys_init初始化程序，利用串口实现PC和开发板的数据通信；2编写S3C2410X 处理器的点阵屏驱动程序；3编写S3C2410X 处理器的点阵屏应用程序。4. 当程序运行等待要求从串口输入学生姓名的字符串在矩阵LED上显示出来。【实验环境】硬件：Embest E

2、duKit-IV 平台，ULINK2 仿真器套件，PC 机；软件：Vision IDE for ARM 集成开发环境，Windows XP。【相关知识综述】背景知识、原理算法等一、硬件部分1点阵屏的结构电路图1点阵屏的结构电路图上QL1-QL16为行驱动信号，每个信号控制一行， LR1LR16 是点阵屏的列驱动信号，每一个信号控制一列。当行信号为高电平而列信号为低电平，对应的LED就会亮。CD40941#芯片LL1LL8LL7RSTRDATACLKSTROBECD40942#芯片LL9LL16LL15DATACLKGPB5LQSGPC0GPD10GPB4GPG8STROBELOELOELSTR

3、列锁存信号2，S3C2410与点阵屏的连接CD40941#芯片LL1LL8LL7RSTRDATACLKSTROBECD40942#芯片LL9LL16LL15DATACLKGPB5LQSGPC0GPD10GPB4GPG8STROBELOELOELSTR列锁存信号图2 S3C2410ARM处理器与两片CD4094连接得到16位行选信号图以上电路可以通过S3C2410GPIO口把CPU的并行数据（16位两个字节的数据）打入到两个CD4094芯片中并锁存起来变成LL1-LL16的行选信号。各信号的作用如下表1； 2410引脚CD4094信号电平高低各信号的作用GPB4STORBE（RSTR）高行锁存允

4、许，将串行数据大入到CD4094相应位低不锁存GPB5LOE高CD4094 上锁存的并行数据全部输出（输出使能）低CD4094 上锁存的并行数据不输出GPD10CLK高CD4094 允许串行输入的数据发生变化低CD4094 不允许串行输入的数据发生变化GPC0DATA高表明串行数据为1低表明串行数据为0GPG8STORBELSTR高列锁存允许，将串行数据大入到CD4094相应位低不锁存3点阵屏的保护电路图3 点阵屏的保护电路图为了保护LED屏加了对应的电阻实现行限流作用，即LL1-LL16变为RQ1-RQ164LED的驱动 加入行驱动电路的目的是实现LED灯的驱动。这样由RQ1-RQ16变为行

5、驱动信号QL1-QL16。Q11-QL16为图1中的行驱动信号。图4 行驱动电路【设计思路】采用的数据结构、主要的函数说明、程序流程设计图等主要的函数说明：led_init(); ：LED显示矩阵初始化static void refresh_l_display_array(u8 bits, u8 *str) ：显示字符void led_logo_disp(void) :显示logostruct fonts_struct unsigned char ascii_width;unsigned char ascii_height;unsigned char * ascii_code;unsigned

6、 char ascii_beg;unsigned char ascii_end;【源程序清单】/* File：main.c* Author:embest* Desc：c main entry* History:*/*-*/* include files */*-*/#include "2410lib.h"#include "sys_init.h"#include "fonts.h"#include "led16x16.h"/* name:main* func:c code entry* para:none* ret

7、:none* modify:* comment:*/int main(void) char c; sys_init();/ Initial systemwhile(1)uart_printf("n Please Look At The 16X16 LEDS And Choose Keyn");uart_printf("1、向左移动n");uart_printf("2、向左闪烁移动n");uart_printf("3、向右移动n");uart_printf("4、向右闪烁移动n"); c=uart

8、_getch(); uart_printf("%c",c); led_init(); / Initial led diplay if(c='1') l_char_out(0,"_学号"); left_out(0,"abcdef"); else if(c='2') l_flash_char_out(0,"_学号"); left_out_flash(0,"abcdef"); else if(c='3') r_char_out(0,"_学号&q

9、uot;);right_out(0,"abcdef"); else if(c='4') r_flash_char_out(0,"_学号"); right_out_flash(0,"abcdef"); /* File:Dotled.c* Author:embest* Desc:DotLed_Test * History:*/*-*/* include files */*-*/#include <stdio.h>#include "2410lib.h"#include "fonts

10、.h"#include "led16x16.h"/*-*/* function declare */*-*/extern void led_char_disp(void);/*-*/* global variables */*-*/u8 l_display_array2*16;u8 assic_buffer3*16;/*=l_display_array:+-+-+| | | | D | E | | | | +-+-+A buffer data and B buffer data ->D buffer dataB buffer data and C buffe

11、r data ->E buffer dataassic_buffer:+-+-+-+| | | | A | B | C |<- update the C buffer and move the B buffer data to the A buffer| | | | and move the C buffer data to the B buffer data+-+-+-+=*/* name:led_update* func:refresh the led display* para:none* ret:none* modify:* comment:*/static void le

12、d_update(void)int j = 20;while(j-)led_char_disp();/* name:l_display_scroll* func:shift the display* para:bits:the position str:point the buffer* ret:none* modify:* comment:*/static void refresh_l_display_array(u8 bits, u8 *str)u32 i;u32 remaining_bits = 8-bits; for(i=0;i<16;i+)l_display_array2*i

13、= (*str<<bits) |(*(str+16)>>remaining_bits);l_display_array2*(i+1)-1 = (*(str+16)<<bits) |(*(str+32)>>remaining_bits);str+; static void refresh_flash_display_array(u8 bits, u8 *str)u32 i;for(i=0;i<16;i+)l_display_array2*i = 0;l_display_array2*(i+1)-1 =0;str+;/* name:l_disp

14、lay_scroll* func:scroll the display* para:str:point the buffer* ret:none* modify:* comment:*/static void l_display_scroll ( u8 *str )int i;for(i=0;i<8;i+)refresh_l_display_array(i, str);led_update(); static void l_flash_display_scroll ( u8 *str )int i;for(i=0;i<8;i+)refresh_l_display_array(i,

15、str);led_update();refresh_flash_display_array(i, str);led_update();static void r_display_scroll ( u8 *str )int i;for(i=8;i>0;i-)refresh_l_display_array(i, str);led_update(); static void r_flash_display_scroll ( u8 *str )int i;for(i=8;i>0;i-)refresh_l_display_array(i, str);led_update();refresh_

16、flash_display_array(i, str);led_update();/* name:copy_data* func:copy data* para:dst:point the dest data src:points the source data* ret:none* modify:* comment:*/static void copy_data(u8 *dst, u8 *src, u32 size)while(size-)*(dst+) = *(src+);/* name:refresh_assic_buffer* func:refresh buffer* para:str

17、:points the new char* ret:none* modify:* comment:*/static void l_refresh_assic_buffer(u8 *str)copy_data(&assic_buffer0, &assic_buffer16,16);copy_data(&assic_buffer16, &assic_buffer32,16);copy_data(&assic_buffer32, str,16);l_display_scroll(assic_buffer);static void l_flash_refresh

18、_assic_buffer(u8 *str)copy_data(&assic_buffer0, &assic_buffer16,16);copy_data(&assic_buffer16, &assic_buffer32,16);copy_data(&assic_buffer32, str,16);l_flash_display_scroll(assic_buffer);static void r_refresh_assic_buffer(u8 *str)copy_data(&assic_buffer32, &assic_buffer16

19、,16);copy_data(&assic_buffer16, &assic_buffer0,16);copy_data(&assic_buffer0, str,16);r_display_scroll(assic_buffer);static void r_flash_refresh_assic_buffer(u8 *str)copy_data(&assic_buffer32, &assic_buffer16,16);copy_data(&assic_buffer16, &assic_buffer0,16);copy_data(&

20、;assic_buffer0, str,16);r_flash_display_scroll(assic_buffer);/* name:char_out* func:display the chars* para:font:0 str:points of the chars* ret:none* modify:* comment:*/ void l_char_out(u8 font, u8 *str)u8 *str_ptr;u8 glyph;glyph = ( u8 )*str;while(glyph != '0' )str_ptr = fontsfont.ascii_cod

21、e + ( glyph - fontsfont.ascii_beg) * fontsfont.ascii_height;l_refresh_assic_buffer(str_ptr);str+;glyph = ( u8 )*str;void l_flash_char_out(u8 font, u8 *str)u8 *str_ptr;u8 glyph;glyph = ( u8 )*str;while(glyph != '0' )str_ptr = fontsfont.ascii_code + ( glyph - fontsfont.ascii_beg) * fontsfont.a

22、scii_height;l_flash_refresh_assic_buffer(str_ptr);str+;glyph = ( u8 )*str;void r_char_out(u8 font, u8 *str)u8 *str_ptr;u8 glyph;glyph = ( u8 )*str;while(glyph != '0' )str_ptr = fontsfont.ascii_code + ( glyph - fontsfont.ascii_beg) * fontsfont.ascii_height;r_refresh_assic_buffer(str_ptr);str+

23、;glyph = ( u8 )*str;void r_flash_char_out(u8 font, u8 *str)u8 *str_ptr;u8 glyph;glyph = ( u8 )*str;while(glyph != '0' )str_ptr = fontsfont.ascii_code + ( glyph - fontsfont.ascii_beg) * fontsfont.ascii_height;r_flash_refresh_assic_buffer(str_ptr);str+;glyph = ( u8 )*str;void left_out(u8 font,

24、 u8 *str)u8 *str_ptr;u8 glyph;glyph = ( u8 )*str;while(glyph != '0' )str_ptr = leftcodefont.ascii_code + ( glyph - leftcodefont.ascii_beg) * leftcodefont.ascii_height;l_refresh_assic_buffer(str_ptr);str+;glyph = ( u8 )*str; void left_out_flash(u8 font, u8 *str)u8 *str_ptr;u8 glyph;glyph = (

25、u8 )*str;while(glyph != '0' )str_ptr = leftcodefont.ascii_code + ( glyph - leftcodefont.ascii_beg) * leftcodefont.ascii_height;l_flash_refresh_assic_buffer(str_ptr);str+;glyph = ( u8 )*str;void right_out(u8 font, u8 *str)u8 *str_ptr;u8 glyph;glyph = ( u8 )*str;while(glyph != '0' )str

26、_ptr = rightcodefont.ascii_code + ( glyph - rightcodefont.ascii_beg) * rightcodefont.ascii_height;r_refresh_assic_buffer(str_ptr);str+;glyph = ( u8 )*str; void right_out_flash(u8 font, u8 *str)u8 *str_ptr;u8 glyph;glyph = ( u8 )*str;while(glyph != '0' )str_ptr = rightcodefont.ascii_code + (

27、glyph - rightcodefont.ascii_beg) * rightcodefont.ascii_height;r_flash_refresh_assic_buffer(str_ptr);str+;glyph = ( u8 )*str;/* name:led_init* func:initial the led display* para:none* ret:none* modify:* comment:*/void led_init(void)rGPBCON = rGPBCON & 0xfff0ff | 0x500; / GPB4,GPB5=01:OutputrGPCCO

28、N = rGPCCON & 0xffff3ffc | 0x4001; / GPC0,GPC7=01:OutputrGPDCON = rGPDCON & 0xffcfffff | 0x100000; / GPD10=01:OutputrGPGCON = rGPGCON & 0xfffcffff | 0x10000; / GPG8=01:Output/* File:fonts.c* Author:embest* Desc:DotLed_Test * History:*/*-*/* include files */*-*/#include "fonts.h"

29、;/ - ASCII字模的数据表 - /unsigned char nAsciiDot = / ASCII0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, / - -0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x3C,0x3C,0x3C,0x18,0x18, / -!-0x18,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x66,0x66,0x66,0x24,0x00,0x00,0x00, / -"-0x00,0x00,0x00,0x00,0x00

30、,0x00,0x00,0x00,0x00,0x00,0x00,0x6C,0x6C,0xFE,0x6C,0x6C, / -#-0x6C,0xFE,0x6C,0x6C,0x00,0x00,0x00,0x00,0x18,0x18,0x7C,0xC6,0xC2,0xC0,0x7C,0x06, / -$-0x86,0xC6,0x7C,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC2,0xC6,0x0C,0x18, / -%-0x30,0x60,0xC6,0x86,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x6C,0x6C,0

31、x38,0x76,0xDC, / -&-0xCC,0xCC,0xCC,0x76,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x30,0x60,0x00,0x00,0x00, / -'-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0C,0x18,0x30,0x30,0x30,0x30, / -(-0x30,0x30,0x18,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x18,0x0C,0x0C,0x0C,0x0C, / -)-0x0C,0x0C,0x18

32、,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x66,0x3C,0xFF, / -*-0x3C,0x66,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x7E, / -+-0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, / -,-0x00,0x18,0x18,0x18,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0

33、x00,0x00,0x00,0x00,0xFE, / -0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, / -.-0x00,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x06,0x0C,0x18, / -/-0x30,0x60,0xC0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0xCE,0xD6,0xD6, / -0-0xE6,0xC6,0xC6

34、,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x38,0x78,0x18,0x18,0x18, / -1-0x18,0x18,0x18,0x7E,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0x06,0x0C,0x18,0x30, / -2-0x60,0xC0,0xC6,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0x06,0x06,0x3C,0x06, / -3-0x06,0x06,0xC6,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x0C,0

35、x1C,0x3C,0x6C,0xCC,0xFE, / -4-0x0C,0x0C,0x0C,0x1E,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0xC0,0xC0,0xC0,0xFC,0x0E, / -5-0x06,0x06,0xC6,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x60,0xC0,0xC0,0xFC,0xC6, / -6-0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0xC6,0x06,0x06,0x0C,0x18, / -7-0x30,0x30,0x

36、30,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0xC6,0x7C,0xC6, / -8-0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0xC6,0x7E,0x06, / -9-0x06,0x06,0x0C,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00, / -:-0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00

37、,0x00,0x18,0x18,0x00,0x00, / -;-0x00,0x18,0x18,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x0C,0x18,0x30,0x60, / -<-0x30,0x18,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x00, / -=-0x00,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x30,0x18,0x0C,0x06, / ->-0x0C

38、,0x18,0x30,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0x0C,0x18,0x18, / -?-0x18,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0xDE,0xDE, / -0xDE,0xDC,0xC0,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x38,0x6C,0xC6,0xC6,0xFE, / -A-0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00,0x00,0x0

39、0,0xFC,0x66,0x66,0x66,0x7C,0x66, / -B-0x66,0x66,0x66,0xFC,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x66,0xC2,0xC0,0xC0,0xC0, / -C-0xC0,0xC2,0x66,0x3C,0x00,0x00,0x00,0x00,0x00,0x00,0xF8,0x6C,0x66,0x66,0x66,0x66, / -D-0x66,0x66,0x6C,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x66,0x62,0x68,0x78,0x68, / -E-0x60

40、,0x62,0x66,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x66,0x62,0x68,0x78,0x68, / -F-0x60,0x60,0x60,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x66,0xC2,0xC0,0xC0,0xDE, / -G-0xC6,0xC6,0x66,0x3A,0x00,0x00,0x00,0x00,0x00,0x00,0xC6,0xC6,0xC6,0xC6,0xFE,0xC6, / -H-0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00,0x00,0

41、x00,0x3C,0x18,0x18,0x18,0x18,0x18, / -I-0x18,0x18,0x18,0x3C,0x00,0x00,0x00,0x00,0x00,0x00,0x1E,0x0C,0x0C,0x0C,0x0C,0x0C, / -J-0xCC,0xCC,0xCC,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0xE6,0x66,0x6C,0x6C,0x78,0x78, / -K-0x6C,0x66,0x66,0xE6,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x60,0x60,0x60,0x60,0x60, / -L-0x

42、60,0x62,0x66,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0xC6,0xEE,0xFE,0xFE,0xD6,0xC6, / -M-0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00,0x00,0x00,0xC6,0xE6,0xF6,0xFE,0xDE,0xCE, / -N-0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x6C,0xC6,0xC6,0xC6,0xC6, / -O-0xC6,0xC6,0x6C,0x38,0x00,0x00,0x00,0x00,0x00

43、,0x00,0xFC,0x66,0x66,0x66,0x7C,0x60, / -P-0x60,0x60,0x60,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0xC6,0xC6,0xC6, / -Q-0xC6,0xD6,0xDE,0x7C,0x0C,0x0E,0x00,0x00,0x00,0x00,0xFC,0x66,0x66,0x66,0x7C,0x6C, / -R-0x66,0x66,0x66,0xE6,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0x60,0x38,0x0C, / -S-0x06,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00,0x00