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標(biāo)題: [單片機(jī)LCD驅(qū)動(dòng)程序分享] LCD1602時(shí)間顯示 [打印本頁(yè)]
作者: Kiyotaka    時(shí)間: 2019-12-8 18:39
標(biāo)題: [單片機(jī)LCD驅(qū)動(dòng)程序分享] LCD1602時(shí)間顯示
LCD1602 時(shí)間顯示

Proteus
時(shí)間為Unix timestamp




AT89C51單片機(jī)源程序如下:
main.c
  1. /**
  2. * @file main.c
  3. * @author Kiyotaka
  4. * @brief Unix timestamp on LCD1602
  5. * @version 0.1
  6. * @date 2019-12-08
  7. *
  8. * @copyright Copyright (c) 2019
  9. *
  10. */
  11. #include "main.h"
  12. #include "lcd1602.h"

  14. void Delay1000ms(void);

  16. unsigned long int timestamp = 157579655;

  18. int main(void) {
  19.   LCD1602_Init();
  20.   LCD1602_Printf(0, 0, "Unix timestamp:");
  21.   while (1) {
  22.     LCD1602_Printf(0, 1, "%ld", timestamp++);
  23.     Delay1000ms();
  24.   }
  25. }

  27. void Delay1000ms(void) {  //@12.000MHz

  29.   unsigned char i = 8;
  30.   unsigned char j = 154;
  31.   unsigned char k = 122;

  33.   _nop_();
  34.   do {
  35.     do {
  36.       while (--k);
  37.     } while (--j);
  38.   } while (--i);
  39. }
復(fù)制代碼

lcd1602.c
  1. /**
  2. * @file lcd1602.c
  3. * @author Kiyotaka
  4. * @brief LCD1602 driver
  5. * @version 0.1
  6. * @date 2019-12-08
  7. *
  8. * @copyright Copyright (c) 2019
  9. *
  10. */
  11. #include "lcd1602.h"

  13. typedef enum { GPIO_PIN_RESET = 0, GPIO_PIN_SET } GPIO_PinState;

  15. #define RS_CMD GPIO_PIN_RESET
  16. #define RS_DATA GPIO_PIN_SET

  18. /**
  19. * @brief 延時(shí)函數(shù)
  20. *
  21. * @param us 延時(shí)時(shí)間
  22. * @return None
  23. */
  24. static void Delay(int us) {
  25.   while (us-- > 0) {
  26.     _nop_();
  27.   }
  28. }

  30. /**
  31. * @brief 液晶I/O 口復(fù)位
  32. *
  33. * @return None
  34. */
  35. static void PinReset(void) {
  36.   LCD1602_E_Pin = GPIO_PIN_RESET;
  37.   LCD1602_RS_Pin = GPIO_PIN_RESET;
  38.   LCD1602_RW_Pin = GPIO_PIN_RESET;
  39.   LCD1602_Port = 0xFF;
  40. }

  42. /**
  43. * @brief LCD1602 等待液晶空閑
  44. *
  45. *@return None
  46. */
  47. static void WaitIdleTime(void) {
  48.   LCD1602_RS_Pin = RS_CMD;
  49.   LCD1602_RW_Pin = GPIO_PIN_SET;
  50.   LCD1602_Port = 0x00;
  51.   LCD1602_E_Pin = GPIO_PIN_SET;
  52.   do {
  53.     Delay(100);
  54.   } while ((LCD1602_Port & 0x80) >> 7);
  55.   PinReset();
  56. }

  58. /**
  59. * @brief LCD1602 寫數(shù)據(jù)/指令函數(shù)
  60. *
  61. * @param val 8位數(shù)據(jù)
  62. * @param is_data true 是數(shù)據(jù), false 是指令
  63. * @return None
  64. */
  65. static void Write(unsigned char val, bit is_data) {
  66.   bit interrupt_stat = EA;

  68.   EA = 0;
  69.   WaitIdleTime();
  70.   LCD1602_RS_Pin = is_data;
  71.   LCD1602_Port = val;
  72.   LCD1602_E_Pin = GPIO_PIN_SET;
  73.   Delay(100);
  74.   PinReset();
  75.   EA = interrupt_stat;
  76. }

  78. /**
  79. * @brief LCD1602 初始化
  80. *
  81. * @return None
  82. */
  83. void LCD1602_Init(void) {
  84.   PinReset();
  85.   Write(0x38, RS_CMD);
  86.   Write(0x0C, RS_CMD);
  87.   Write(0x06, RS_CMD);
  88.   Write(0x01, RS_CMD);
  89. }

  91. /**
  92. * @brief LCD1602 顯示函數(shù)
  93. *
  94. * @param addr_x (0~15) 橫坐標(biāo)
  95. * @param addr_y (0~1) 縱坐標(biāo)
  96. * @param fmt 格式化字符串
  97. * @param ...
  98. * @return int
  99. */
  100. int LCD1602_Printf(int addr_x, int addr_y, const char *fmt, ...) {
  101.   char buf[20] = {0};
  102.   char *p = buf;
  103.   int ret = 0;
  104.   va_list args;

  106.   va_start(args, fmt);
  107.   ret = vsprintf(p, fmt, args);
  108.   va_end(args);

  110.   Write(0x80 + 0x40 * addr_y + addr_x, RS_CMD);
  111.   while (*p != '\0') {
  112.     if (*p == '\f') {
  113.       Write(0x01, RS_CMD);
  114.     } else if (isprint(*p) != 0) {
  115.       Write(*p, RS_DATA);
  116.     }
  117.     p++;
  118.   }

  120.   return ret;
  121. }
復(fù)制代碼


驅(qū)動(dòng)程序(Keil + Proteus)
lcd1602.zip (47.8 KB, 下載次數(shù): 24)

如果注釋為亂碼，Keil的Encoding設(shè)置成UTF-8






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