DS1302只有年份前两位读取正确，其他位为0

ppxia · 发表于 2018-9-19 00:45:20

诸位大佬，直接修改的51单片机上DS1302程序，只有年份前两位读取正确，其他位全是0，不知道怎么回事，请大佬们看看代码共有3段，main.c的部分代码，ds1302.h，ds1302.c

main.c
[mw_shl_code=applescript,true]DS1302_init();
DS1302_write_time();
DS1302_read_time(); [/mw_shl_code]

ds1302.h
[mw_shl_code=applescript,true]#include "stm32f0xx_hal.h"
#include "main.h"
#include "oled.h"
#include "delay.h"

//3õê¼ê±¼ä¶¨òå¼ûDS1302.c

//òy½Å¶¨òå
#define DS1302_RST_L HAL_GPIO_WritePin(DS132_RST_GPIO_Port, DS132_RST_Pin, GPIO_PIN_RESET)
#define DS1302_RST_H HAL_GPIO_WritePin(DS132_RST_GPIO_Port, DS132_RST_Pin, GPIO_PIN_SET)

#define DS1302_CLK_L HAL_GPIO_WritePin(DS1302_CLK_GPIO_Port, DS1302_CLK_Pin, GPIO_PIN_RESET)
#define DS1302_CLK_H HAL_GPIO_WritePin(DS1302_CLK_GPIO_Port, DS1302_CLK_Pin, GPIO_PIN_SET)

#define DS1302_DAT_L HAL_GPIO_WritePin(DS1302_DAT_GPIO_Port, DS1302_DAT_Pin, GPIO_PIN_RESET)
#define DS1302_DAT_H HAL_GPIO_WritePin(DS1302_DAT_GPIO_Port, DS1302_DAT_Pin, GPIO_PIN_SET)
#define DS1302_DAT_READ HAL_GPIO_ReadPin(DS1302_DAT_GPIO_Port, DS1302_DAT_Pin)

//DS1302μØÖ·¶¨òå
#define DS1302_sec_add 0x80 //Ãëêy¾YμØÖ·
#define DS1302_min_add 0x82 //·Öêy¾YμØÖ·
#define DS1302_hr_add 0x84 //ê±êy¾YμØÖ·
#define DS1302_date_add 0x86 //èÕêy¾YμØÖ·
#define DS1302_month_add 0x88 //ÔÂêy¾YμØÖ·
#define DS1302_day_add 0x8a //DÇÆúêy¾YμØÖ·
#define DS1302_year_add 0x8c //Äêêy¾YμØÖ·
#define DS1302_control_add 0x8e //¿ØÖÆêy¾YμØÖ·
#define DS1302_charger_add 0x90
#define DS1302_clkburst_add 0xbe

void DS1302_init(void);
void DS1302_write_byte(unsigned char addr, unsigned char d);
unsigned char DS1302_read_byte(unsigned char addr);
void DS1302_write_time(void);
void DS1302_read_time(void);

[/mw_shl_code]

ds1302.c

[mw_shl_code=c,true]#include "ds1302.h"

unsigned char time_buf[8] = {0x22,0x17,0x01,0x01,0x23,0x59,0x55,0x02};//3õê¼ê±¼ä
unsigned char readtime[14];//μ±Ç°ê±¼ä
unsigned char sec_buf=0;  //Ãë»o′æ
unsigned char sec_flag=0; //Ãë±êÖ¾Î»

void DS1302_init(void)
{
DS1302_RST_L;
DS1302_CLK_L;
}
//′óDS1302¶á3öò»×Ö½úêy¾Y
unsigned char DS1302_read_byte(unsigned char addr)
{
unsigned char i,temp;
DS1302_RST_H; //Æô¶ˉDS1302×üÏß
//D′èëÄ¿±êμØÖ·￡oaddr
addr = addr | 0x01; //×îμíÎ»ÖÃ¸ß￡¬¼Ä′æÆ÷0Î»Îa0ê±D′￡¬Îa1ê±¶á
for (i = 0; i < 8; i ++) {
if (addr & 0x01) {
DS1302_DAT_H;
}
else {
DS1302_DAT_L;
}
DS1302_CLK_H;
DS1302_CLK_L;
addr = addr >> 1;
}
//êä3öêy¾Y￡otemp
for (i = 0; i < 8; i ++)
{
temp = temp >> 1;
if (DS1302_DAT_READ==1)
{
temp |= 0x80;
}
else
{
temp &= 0x7F;
}
DS1302_CLK_H;
DS1302_CLK_L;
};
DS1302_RST_L; //í￡Ö1DS1302×üÏß
return temp;
}
//ÏòDS1302D′èëò»×Ö½úêy¾Y
void DS1302_write_byte(unsigned char addr, unsigned char d){
unsigned char i;
DS1302_RST_H; //Æô¶ˉDS1302×üÏß
//D′èëÄ¿±êμØÖ·￡oaddr
addr = addr & 0xFE; //×îμíÎ»ÖÃáã￡¬¼Ä′æÆ÷0Î»Îa0ê±D′￡¬Îa1ê±¶á
for (i = 0; i < 8; i ++) {
if(addr & 0x01) {
DS1302_DAT_H;
}
else {
DS1302_DAT_L;
}
DS1302_CLK_H;    //2úéúê±Öó
DS1302_CLK_L;
addr = addr >> 1;
}
//D′èëêy¾Y￡od
for (i = 0; i < 8; i ++) {
if (d & 0x01) {
DS1302_DAT_H;
}
else {
DS1302_DAT_L;
}
DS1302_CLK_H;    //2úéúê±Öó
DS1302_CLK_L;
d = d >> 1;
}
DS1302_RST_L; //í￡Ö1DS1302×üÏß

}

void DS1302_write_time(void)
{
DS1302_write_byte(DS1302_control_add,0x00); //1Ø±ÕD′±￡»¤
DS1302_write_byte(DS1302_sec_add,0x80); //ÔYí￡ê±Öó
//DS1302_write_byte(DS1302_charger_add,0xa9);       //ä¸á÷3äμç
DS1302_write_byte(DS1302_year_add,time_buf[1]); //Äê
DS1302_write_byte(DS1302_month_add,time_buf[2]); //ÔÂ
DS1302_write_byte(DS1302_date_add,time_buf[3]); //èÕ
DS1302_write_byte(DS1302_hr_add,time_buf[4]); //ê±
DS1302_write_byte(DS1302_min_add,time_buf[5]); //·Ö
DS1302_write_byte(DS1302_sec_add,time_buf[6]); //Ãë
DS1302_write_byte(DS1302_day_add,time_buf[7]); //Öü
DS1302_write_byte(DS1302_control_add,0x80); //′ò¿aD′±￡»¤
}
//′óDS302¶á3öê±Öóêy¾Y
void DS1302_read_time(void)
{
time_buf[1]=DS1302_read_byte(DS1302_year_add); //Äê
time_buf[2]=DS1302_read_byte(DS1302_month_add); //ÔÂ
time_buf[3]=DS1302_read_byte(DS1302_date_add); //èÕ
time_buf[4]=DS1302_read_byte(DS1302_hr_add); //ê±
time_buf[5]=DS1302_read_byte(DS1302_min_add); //·Ö
time_buf[6]=(DS1302_read_byte(DS1302_sec_add))&0x7f;//Ãë￡¬Æá±ÎÃëμÄμú7Î»￡¬±üÃa3¬3ö59
time_buf[7]=DS1302_read_byte(DS1302_day_add); //Öü

readtime[0]=(time_buf[0]>>4); //·Öàë3öÄêÇ§Î»
  readtime[1]=(time_buf[0]&0x0F); //·Öàë3öÄê°ùÎ»
  readtime[2]=(time_buf[1]>>4); //·Öàë3öÄêê®Î»
  readtime[3]=(time_buf[1]&0x0F); //·Öàë3öÄê¸öÎ»

  readtime[4]=(time_buf[2]>>4); //·Öàë3öÔÂê®Î»
  readtime[5]=(time_buf[2]&0x0F); //·Öàë3öÔÂ¸öÎ»

  readtime[6]=(time_buf[3]>>4); //·Öàë3öèÕê®Î»
  readtime[7]=(time_buf[3]&0x0F); //·Öàë3öèÕ¸öÎ»

  readtime[8]=(time_buf[4]>>4); //·Öàë3öD¡ê±ê®Î»
  readtime[9]=(time_buf[4]&0x0F); //·Öàë3öD¡ê±¸öÎ»
  readtime[10]=(time_buf[5]>>4); //·Öàë3ö·ÖÖóê®Î»
  readtime[11]=(time_buf[5]&0x0F); //·Öàë3ö·ÖÖó¸öÎ»
  readtime[12]=(time_buf[6]>>4); //·Öàë3öÃëÖóê®Î»
  readtime[13]=(time_buf[6]&0x0F); //·Öàë3öÃëÖó¸öÎ»
if(1)
//if(readtime[13]!=sec_buf)
{
sec_buf=readtime[13];

OLED_ShowChar(0,2,readtime[0]+'0');//Äê
OLED_ShowChar(8,2,readtime[1]+'0');
OLED_ShowChar(16,2,readtime[2]+'0');
OLED_ShowChar(24,2,readtime[3]+'0');
OLED_ShowChar(40,2,'-');
OLED_ShowChar(48,2,readtime[4]+'0');//ÔÂ
OLED_ShowChar(56,2,readtime[5]+'0');
OLED_ShowChar(64,2,'-');
OLED_ShowChar(72,2,readtime[6]+'0');//èÕ
OLED_ShowChar(90,2,readtime[7]+'0');
//OLED_ShowChar(0,2,' ');
OLED_ShowChar(0,4,readtime[8]+'0');//ê±
OLED_ShowChar(8,4,readtime[9]+'0');
OLED_ShowChar(16,4,':');
OLED_ShowChar(32,4,readtime[10]+'0');//·Ö
OLED_ShowChar(40,4,readtime[11]+'0');
OLED_ShowChar(48,4,':');
OLED_ShowChar(56,4,readtime[12]+'0');//Ãë
OLED_ShowChar(64,4,readtime[13]+'0');
}
OLED_ShowString(0,6,&readtime[13]);
OLED_ShowNum(40,6,readtime[13]);

}

[/mw_shl_code]