第12章-指针基础与1602液晶的初步认识

2023-09-09 13:29 作者:feifeiluan2 0人读过 | 我要投稿

老规矩,,,c语言部分跳过

//课后作业3,,串口下发字符,进行显示
//写错了,,,写成字符串了,,,

#include "reg52.h"

///////////////////// use keil ///////////////////////
#if defined(__C51__)
// 通用类型
typedef signed char i8;
typedef signed int i16;
typedef signed long i32;
typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;

sfr16 TMR2 = 0xCC; /* Timer 2: T2L 0CCh, T2H 0CDh */
sfr16 RCAP2 = 0xCA; /* RCAP2L 0CAh, RCAP2H 0CBh */
#define NOP _nop_();
extern void _nop_(void);
extern int sprintf(char *, const char *, ...);
extern int sscanf(char *, const char *, ...);

// 中断号
#define EX0_INT interrupt 0
#define T0_INT interrupt 1
#define EX1_INT interrupt 2
#define T1_INT interrupt 3
#define UART_INT interrupt 4
#define T2_INT interrupt 5

#endif

// 开发板
#define SYS_CLK (11059200)
#define MCU_nT (12)
#define TIMER_CLK (SYS_CLK / MCU_nT)

//////////////////////////////////////////////////////

#define LCD1602_DB P0
sbit LCD1602_RS = P1 ^ 0;
sbit LCD1602_RW = P1 ^ 1;
sbit LCD1602_E = P1 ^ 5;

bit uartCntEnFlag = 0;
u8 uartCnt = 0;

bit strReadyFlag = 0;
u8 strBuff[32];
u8 strCnt = 0;

u8 TH0RL, TL0RL;

void LcdWaitReady(void)
{
   u8 sta;

   LCD1602_DB = 0xFF;
   LCD1602_RS = 0;
   LCD1602_RW = 1;
   do
   {
       LCD1602_E = 1;
       sta = LCD1602_DB;
       LCD1602_E = 0;
   } while (sta & 0x80);
}
void LcdWriteCmd(u8 cmd)
{
   LcdWaitReady();
   LCD1602_RS = 0;
   LCD1602_RW = 0;
   LCD1602_DB = cmd;
   LCD1602_E = 1;
   LCD1602_E = 0;
}

void LcdWriteDat(u8 dat)
{
   LcdWaitReady();
   LCD1602_RS = 1;
   LCD1602_RW = 0;
   LCD1602_DB = dat;
   LCD1602_E = 1;
   LCD1602_E = 0;
}

void InitLcd1602(void)
{
   LcdWriteCmd(0x38);
   LcdWriteCmd(0x0C);
   LcdWriteCmd(0x06);
   LcdWriteCmd(0x01);
}

void LcdSetCursor(u8 hang, u8 lie)
{
   u8 addr;

   if (hang == 0)
       addr = 0 + lie;
   else
       addr = 0x40 + lie;
   LcdWriteCmd(0x80 + addr);
}

void LcdShowStr(u8 hang, u8 lie, u8 *str)
{
   LcdSetCursor(hang, lie);
   while (*str != '\0')
   {
       LcdWriteDat(*str++);
   }
}

void ConfigUART(u32 baud)
{
   // UART
   SCON = 0x50;
   ES = 1;

   // T1
   TMOD = (TMOD & 0x0F) | 0x20;
   TH1 = TL1 = 256 - (TIMER_CLK / 32 / baud);
   ET1 = 0;
   TR1 = 1;
}

void ConfigTimer0(u8 ms)
{
   u16 tmp = 65536 - (TIMER_CLK * ms / 1000);

   TMOD = (TMOD & 0xF0) | 0x01;
   TH0 = TH0RL = (u8)(tmp >> 8);
   TL0 = TL0RL = (u8)(tmp);
   ET0 = TR0 = 1;
}

void main(void)
{
   EA = 1;

   InitLcd1602();
   ConfigTimer0(1);
   ConfigUART(9600);

   while (1)
   {
       if (strReadyFlag)
       {
           LcdShowStr(0, 0, strBuff);
           strReadyFlag = 0;
           strCnt = 0;
       }
   }
}

void UART_ISR(void) UART_INT
{
   if (TI)
   {
       TI = 0;
   }
   if (RI)
   {
       RI = 0;
       strBuff[strCnt++] = SBUF;
       uartCnt = 0;
       uartCntEnFlag = 1;
   }
}

void T0_ISR(void) T0_INT
{
   TH0 = TH0RL;
   TL0 = TL0RL;

   if (uartCntEnFlag)
   {
       uartCnt++;
       if (uartCnt > 100)
       {
           uartCntEnFlag = 0;
           uartCnt = 0;
           strBuff[strCnt++] = '\0';
           strReadyFlag = 1;
       }
   }
}