#ifndef __DS1302_H
#define __DS1302_H
#include "stm32f10x.h"
extern u8 d[7]; //依次为年，周，月，日，时，分，秒
extern u8 disp[14];//依次为年[0]【1】；周[2]【3】；月[4]【5】
//***********************日[6]【7】；时[8]【9】；分[10]【11】；秒[12]【13】
void ds1302d_convert(void); //如果用低disp[];必须在read_time();后调用此函数；
void ds1302set_time(void); //对时函数
void ds1302read_time(void); //读取时间
#endif /* __STM32F10x_IT_H */
DS1302——C程序
时 间：11—5-4
标 注：用到了 PA_3—5,PA3_5位控制为依次sclk---GPIOa3，io----GPIOa4，res----GPIOa5
已在函数中将他们以寄存器形式配置,注再出再次配置PA时
不应在配置这些口；
在主函数中需将PA使能。
头函数：#include"ds1302.h"
函 数：在ds1302.h中有列举；
返回值：无；
/*************************
// ds1302，定时，
**************************/
//#include<intrins.h>//sbit res=P1^7; GPIOa5
/***************************/
u8 write_add[7]={0x8c,0x8a,0x88,0x86,0x84,0x82,0x80};//读地址
u8 read_add[7]={0x8d,0x8b,0x89,0x87,0x85,0x83,0x81};//写地址
/**************************/
u8 settime[7]={11,4,2,23,13,54,11};//年，周，月，日，时，分，秒
u8 d[7];
u8 disp[14];
void delayms(unsigned short time)//nms
{
unsigned short i, j;
for(; time > 0; time--){
for(j = 0; j < 10; j++){
for(i = 0; i < 1000; i++);
}
}
}
void writeds1302_dat(u8 dat)
{
u8 i;
for(i=0;i<8;i++)
{
GPIOA->ODR&=0xffef; //GPIOA->ODR&=0<<4;
GPIOA->ODR&=0xfff7; //GPIOA->ODR&=0<<3; //sclk=0;
if(dat&0x01)
GPIOA->ODR|=1<<4; //io=dat&0x01;
dat=dat>>1;
GPIOA->ODR|=1<<3; //sclk=1;
}
}
/***********************/
void write_ds1302_byte(u8 add,u8 dat)
{
GPIOA->ODR&=0xffdf;//GPIOA->ODR&=0<<5; //res=0;????????????
delayms(1); //_nop_();
GPIOA->ODR&=0xfff7;//GPIOA->ODR&=0<<3; //sclk=0;
delayms(1); //_nop_();
GPIOA->ODR|=1<<5; //GPIOA->ODR|=1<<5; //res=1;
delayms(1); //_nop_();
writeds1302_dat(add);
writeds1302_dat(dat);
GPIOA->ODR&=0xffdf;//GPIOA->ODR&=0<<5; //res=0;
delayms(1); //_nop_();
}
/***************************/
u8 read_ds1302_byte(u8 dat)
{
u8 i,temp;
GPIOA->ODR&=0xffdf;//GPIOA->ODR&=0<<5; //res=0;
delayms(1); //_nop_();
GPIOA->ODR&=0xfff7;//GPIOA->ODR&=0<<3;//sclk=0;
delayms(1); //_nop_();
GPIOA->ODR|=1<<5; //res=1;
delayms(1); //_nop_();
for(i=0;i<8;i++)
{
GPIOA->ODR&=0xffef;//GPIOA->ODR&=0;
GPIOA->ODR&=0xfff7;//GPIOA->ODR&=0<<3; //sclk=0;
if(dat&0x01)
GPIOA->ODR|=1<<4; //io=dat&0x01;
dat=dat>>1;
GPIOA->ODR|=1<<3; //sclk=1;
}
for(i=0;i<8;i++)
{
temp=temp>>1;
GPIOA->ODR&=0xfff7;//GPIOA->ODR&=0<<3; //sclk=0;
if(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_4))
temp=temp|0x80;
GPIOA->ODR|=1<<3; //sclk=1;
}
GPIOA->ODR&=0xffdf;//GPIOA->ODR&=0<<5; //res=0;
delayms(1); //_nop_();
return temp;
}
//**************************
void dat_pros()
{
u8 i,temp;
for(i=0;i<7;i++)
{
temp=settime/10;
settime=settime%10+temp*16; //*************trans to BCD
}
}
//******************************
void ds1302set_time()
{
u8 i;
GPIOA->CRL&=0XFF000FFF;
GPIOA->CRL|=0X00333000; //PA3-4推挽输出
GPIOA->ODR|=7<<3; //PA3-4置高电平
dat_pros();
write_ds1302_byte(0x8e,0x00); //************del wr protect
for(i=0;i<7;i++)
{
write_ds1302_byte(write_add,settime);
}
write_ds1302_byte(0x8e,0x80);//**************add wr protect
}
//*****************************
void ds1302d_convert()
{
disp[0]=d[0]/10;
disp[1]=d[0]%10;
disp[2]=d[1]/10;
disp[3]=d[1]%10;
disp[4]=d[2]/10;
disp[5]=d[2]%10;
disp[6]=d[3]/10;
disp[7]=d[3]%10;
disp[8]=d[4]/10;
disp[9]=d[4]%10;
disp[10]=d[5]/10;
disp[11]=d[5]%10;
disp[12]=d[6]/10;
disp[13]=d[6]%10;
}
void ds1302read_time()
{
u8 i;
for(i=0;i<7;i++)
{
settime=read_ds1302_byte(read_add);
}
d[0]=settime[0]/16*10+settime[0]%16;
d[1]=settime[1]/16*10+settime[1]%16;
d[2]=settime[2]/16*10+settime[2]%16;
d[3]=settime[3]/16*10+settime[3]%16;
d[4]=settime[4]/16*10+settime[4]%16;
d[5]=settime[5]/16*10+settime[5]%16;
d[6]=settime[6]/16*10+settime[6]%16;
//d_convert();
}
应用举例
main.c
#include "stm32f10x.h"
#include"1602.h"
#include"ds1302.h"
EXTI_InitTypeDef EXTI_InitStructure;
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
u8 table[]="2010-4-30";
u8 table1[3]="hjw";
u8 table2[2]="00";
void Delay(unsigned short time)//nms
{
unsigned short i, j;
for(; time > 0; time--){
for(j = 0; j < 10; j++){
for(i = 0; i < 1000; i++);
}
}
}
int main(void)
{
//u8 i;
/* System Clocks Configuration */
RCC_Configuration();
/* NVIC configuration */
NVIC_Configuration();
/* Configure the GPIO ports */
GPIO_Configuration();
lcd1602_init();
ds1302set_time();
while (1)
{
ds1302read_time();
ds1302d_convert();
write1602_Achar(1,2,disp[8]);
write1602_Achar(1,3,disp[9]); //显示 时
write1602_Achar(1,4,0x0a);//':'
write1602_Achar(1,5,disp[10]);
write1602_Achar(1,6,disp[11]);
write1602_Achar(1,7,0x0a);//显示分
write1602_Achar(1,8,disp[12]);
write1602_Achar(1,9,disp[13]);//显示秒
}
}
void RCC_Configuration(void)
{
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
/* Enable Key Button GPIO Port, GPIO_LED and AFIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOA| RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOB
| RCC_APB2Periph_AFIO, ENABLE);
}
/*******************************************************************************
* Function Name : GPIO_Configuration
* Description : Configures the different GPIO ports.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_All;
GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void NVIC_Configuration(void)
{
//NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}
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