单片机驱动LCM1604四行液晶例程

单片机源程序如下:

1. /* Module---------------------------------------------------------------------*/
   
2. #define    _MAIN_MODULE_
   
3. 
   
4. /* Includes ------------------------------------------------------------------*/
   
5. #include "main.h"
   
6. 
   
7. /* Private typedef -----------------------------------------------------------*/
   
8. #define DATAPORT  P0
   
9. sbit  LCD_RS = P1^0;//0指令 1数据
   
10. sbit  LCD_RW = P1^1;//0写 1读
    
11. sbit  LCD_EN = P1^2;//使能信号脚
    
12. /* Private define ------------------------------------------------------------*/
    
13. 
    
14. 
    
15. /* Private macro -------------------------------------------------------------*/
    
16. code const uint8_t revision_date[12] = __DATE__;        //固件生成日期
    
17. code const uint8_t revision_time[16] = __TIME__;        //固件生成时间
    
18. code const uint8_t revision_ver[13]={" Ver:1.0 \r\n"};//版本信息
    
19. 
    
20. 
    
21. /* Private variables ---------------------------------------------------------*/
    
22. 
    
23. /* Private function prototypes -----------------------------------------------*/
    
24. 
    
25. /* Private functions ---------------------------------------------------------*/
    
26. 
    
27. unsigned int time_ms;
    
28. unsigned char  seg[]={
    
29. "  LCD1604 Demo  "
    
30. "  By    Liming  "
    
31. "   2021-06-15   "
    
32. "  PM: --:--:--  "
    
33. };
    
34. 
    
35. void IO_Init(void)
    
36. {
    
37.   P0M0 = 0x00;P0M1 = 0X00;
    
38.     P1M0 = 0x07;P1M1 = 0X00;
    
39. }
    
40. /*******************************************************************************
    
41.   * @brief  None
    
42.   * @param  None
    
43.   * @retval None
    
44. ****************************************************************Author:Liming**/
    
45. void TIM0_Init(void)    //1毫秒@22.1184MHz
    
46. {
    
47.   AUXR |= 0x80;   //定时器时钟1T模式
    
48.   TMOD &= 0xF0;   //设置定时器模式
    
49.   TL0 = 0x9A;   //设置定时初值
    
50.   TH0 = 0xA9;   //设置定时初值
    
51.   TF0 = 0;    //清除TF0标志
    
52.   ET0 = 1;    //定时器0中断开启
    
53.   TR0 = 1;    //定时器0开始计时
    
54.   EA = 1;
    
55. }
    
56. void TIM0_int (void) interrupt 1
    
57. {
    
58.   if(time_ms>0)time_ms--;
    
59.   if(task1s)task1s--;  
    
60. }
    
61. void Delay(unsigned int t)
    
62. {   
    
63.     time_ms = t;
    
64.     while(time_ms);
    
65. }
    
66. 
    
67. uint8_t LCD1604_ReadSta(void)
    
68. {
    
69.   uint8_t res;
    
70. 
    
71.   LCD_RS = 0;
    
72.   LCD_RW = 1;
    
73.   LCD_EN = 1;Delay(5);
    
74.   res = DATAPORT;
    
75.   LCD_EN = 0;
    
76.   return res;
    
77. }
    
78. 
    
79. 
    
80. void LCD1604_BusyWait(void)
    
81. {
    
82.   /*当P0^7为低电平时，P0口为空闲状态*/
    
83.   while((LCD1604_ReadSta()&0x80)==0x80);
    
84.   Delay(1);
    
85. }
    
86. 
    
87. void LCD1604_WriteCmd(unsigned char Cmd)
    
88. {
    
89.   LCD1604_BusyWait();
    
90.   LCD_RS = 0;
    
91.   LCD_RW = 0;
    
92.   DATAPORT = Cmd;
    
93.   LCD_EN = 1;Delay(10);
    
94.   LCD_EN = 0;
    
95. }
    
96. 
    
97. 
    
98. void LCD1604_WriteDat(unsigned char Dat)
    
99. {
    
100.   LCD1604_BusyWait();
     
101.   LCD_RS = 1;
     
102.   LCD_RW = 0;
     
103.   DATAPORT = Dat;
     
104.   LCD_EN = 1;
     
105.   Delay(10);
     
106.   LCD_EN = 0;
     
107. }
     
108. 
     
109. void initial(void){
     
110.   LCD1604_WriteCmd(0x38);
     
111.   LCD1604_WriteCmd(0x01);
     
112.   LCD1604_WriteCmd(0x06);
     
113.   LCD1604_WriteCmd(0x0c);
     
114. }
     
115.                                                                         
     
116. void main(void){
     
117. 
     
118.   unsigned char data_index;
     
119.   unsigned char i;
     
120.   
     
121.   TIM0_Init();  //SysTick 1ms
     
122.   initial();        //初始化LCD
     
123.   while(1){
     
124.     if(task1s==0)
     
125.     {
     
126.       task1s = 1000;sec++;
     
127.       if(sec>=60){
     
128.         sec = 0;min++;
     
129.         if(min>=60){
     
130.           min = 0;hour++;
     
131.           if(hour>=12)hour = 0;
     
132.         }
     
133.       }
     
134.       seg[54] = (hour/10)+'0';
     
135.       seg[55] = (hour%10)+'0';
     
136.       seg[57] = (min/10)+'0';
     
137.       seg[58] = (min%10)+'0';
     
138.       seg[60] = (sec/10)+'0';
     
139.       seg[61] = (sec%10)+'0';
     
140.   
     
141.       data_index = 0;
     
142.       LCD1604_WriteCmd(0x80);//第一行
     
143.       while(data_index<=15){LCD1604_WriteDat(seg[data_index]);data_index++;}
     
144.       LCD1604_WriteCmd(0xc0);//第二行
     
145.       while(data_index<=31){LCD1604_WriteDat(seg[data_index]);data_index++;}
     
146.       LCD1604_WriteCmd(0x90);//第三行
     
147.       while(data_index<=47){LCD1604_WriteDat(seg[data_index]);data_index++;}
     
148.       LCD1604_WriteCmd(0xd0);//第四行
     
149.       while(data_index<=63){LCD1604_WriteDat(seg[data_index]);data_index++;}
     
150.     }
     
151. }
     
152. }
     

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