标题: 单片机驱动LCM1604四行液晶例程 [打印本页]
作者: IdeaMing    时间: 2021-6-18 14:31
标题: 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_

  4. /* Includes ------------------------------------------------------------------*/
  5. #include "main.h"

  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 ------------------------------------------------------------*/


  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


  21. /* Private variables ---------------------------------------------------------*/

  23. /* Private function prototypes -----------------------------------------------*/

  25. /* Private functions ---------------------------------------------------------*/

  27. unsigned int time_ms;
  28. unsigned char  seg[]={
  29. "  LCD1604 Demo  "
  30. "  By    Liming  "
  31. "   2021-06-15   "
  32. "  PM: --:--:--  "
  33. };

  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. }

  67. uint8_t LCD1604_ReadSta(void)
  68. {
  69.   uint8_t res;

  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. }


  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. }

  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. }


  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. }

  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){

  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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