用ds1302編程時出現的問題

ID:643131 · 發表于 2019-12-7 12:09

#include "stc15.h"
#include "ds1302.h"
#include <intrins.h>

u8 shi,fen,miao,a[];  //全局變量
bit time_flag;

u8 code table[] =
{ //共陽極編碼表
0xc0,0xf9,0xa4,0xb0,
//0, 1,    2,    3
0x99,0x92,0x82,0xf8,
//4, 5,    6,    7
0x80,0x90,0xff,0xbf
//8, 9, 空,-,
};

u8 code order[] =
{ //數碼管位碼
0x01,0x02,0x04,0x08,
0x10,0x20,0x40,0x80
};

void Delay2ms() //@11.0592MHz 2ms延時
{
unsigned char i, j;

_nop_();
_nop_();
i = 22;
j = 128;
do
{
while (--j);
} while (--i);
}

void Refresh_time()          //數碼管顯示時間
{
if(time_flag == 1)
{
time_flag = 0;
   shi = DS1302_Read(0x85);
      fen  = DS1302_Read(0x83);
   miao = DS1302_Read(0x81);
}
a[0] = shi/16;
a[1] = shi%16;
a[2] = 11;
a[3] = fen/16;
a[4] = fen%16;
a[5] = 11;
a[6] = miao/16;
a[7] = miao%16;
}

void num_display()       //數碼管顯示
{
   static u8 i=0;
P0 = 0x00;
P2 = (P2 & 0x1f) | 0xc0;
P2 = (P2 & 0x1f);
P0 = table[a[i]];
P2 = (P2 & 0x1f) | 0xe0;
P2 = (P2 & 0x1f);
P0 = order[i];
P2 = (P2 & 0x1f) | 0xc0;
P2 = (P2 & 0x1f);
i++;
i &= 0x07;
Delay2ms();
}

void Timer0Init(void) //2毫秒@11.0592MHz
{
AUXR |= 0x80; //定時器時鐘1T模式
TMOD &= 0xF0; //設置定時器模式
TL0 = 0x9A;    //設置定時初值
TH0 = 0xA9;    //設置定時初值
TF0 = 0;       //清除TF0標志
TR0 = 1;
ET0 = 1;
  EA = 1;    //定時器0開始計時
}

void T0_time() interrupt 1
{
static u8 time_count = 0;
num_display();
if(++time_count >= 200)
{
time_count  = 0;
time_flag = 1;
}
}

void main()
{
Timer0Init();
DS1302_Init(12,00,00);
while(1)
{
   Refresh_time();
   num_display();
}
}

/

/************ ds1302.c **************/

#include "stc15.h"
#include "ds1302.h"

sbit SCK = P1^7;    //時鐘芯片引腳
sbit RST = P1^3;
sbit SDA = P2^3;

void DS1302_Write_Byte(u8 dat) //單字節寫入一字節數據
{
u8 i;
SCK_CLR;          //SCLK管腳置低，初始化DS1302
for(i = 0;i < 8;i++)
{
if(dat & 0x01)
{
SCK_SET;    //I/O口置高電平
}
else
{
SCK_CLR;    //I/O口置低電平
}
SCK_SET;       //SCLK上升沿，讀取數據
SCK_CLR;       //拉低SCLK,傳輸下一位數據
dat = dat >> 1;
}
}

void DS1302_Write(u8 addr,u8 dat) //向 DS1302 單字節寫入一字節數據
{
RST_CLR;                //RST管腳置低，初始化DS1302
SCK_CLR;          //SCLK管腳置低，初始化DS1302
RST_SET;          //啟動DS1302總線，RST置高電平
addr &= 0xfe;          //最低位置零，保證穩定環境
DS1302_Write_Byte(addr);    //寫入目標地址
DS1302_Write_Byte(dat); //寫入數據
RST_CLR; //停止DS1302總線
SCK_CLR;
}

unsigned char DS1302_Read_Byte(void) //單字節讀一字節數據
{
u8 i,dat =  0;
for(i = 0;i < 8;i++)
{
dat = dat >> 1;
if(SDA = 1)
{
dat |= 0x80;
}
else
{
dat &= 0x7f;
}
SCK_SET;                //SCLK下降沿，鎖存數據
SCK_CLR;
}
return dat;
}

unsigned char DS1302_Read(u8 addr)       //從 DS1302 單字節讀出一字節數據
{
u8 temp;
RST_CLR;
SCK_CLR;
RST_SET;
addr |= 0x01;             //最低位置高，保證是讀操作
DS1302_Write_Byte(addr);
  temp = DS1302_Read_Byte(); //從 DS1302 單字節讀出一字節數據
RST_CLR;
SDA_CLR;
return temp;
}

void DS1302_Init(u8 shi,u8 fen,u8 miao)       //時鐘初始化
{
DS1302_Write(0x8e,0x00);                   //關閉寫保護
DS1302_Write(0x80,((miao/10)<<4)|(miao%10)); //分別寫秒分時地址
DS1302_Write(0x82,((fen/10)<<4)|(fen%10));
DS1302_Write(0x84,((shi/10)<<4)|(shi%10));
DS1302_Write(0x8e,0x80);                   //開啟寫保護
}

/********** ds1302.h **********/

#ifndef _DS1302_H
#define _DS1302_H

typedef unsigned char u8;
typedef unsigned int u16;

#define SCK_CLR SCK = 0;
#define SCK_SET SCK = 1;
#define RST_CLR RST = 0;
#define RST_SET RST = 1;
#define SDA_CLR SDA = 0;
#define SDA_SET SDA = 1;

extern void DS1302_Write_Byte(u8 dat);
extern void DS1302_Write(u8 addr,u8 dat);
extern unsigned char DS1302_Read_Byte(void);
extern unsigned char DS1302_Read(u8 addr);
extern void DS1302_Init(u8 shi,u8 fen,u8 miao);

#endif

用ds1302芯片在數碼管上顯示時間，編譯時有十個警告，下到單片機里現象也不對，哪位大神幫忙看看為啥有警告