STM32F103驱动DS1302程序(带注释)10页

1、1简介主控芯片是STM32F103ZET6，DS1302模块在某宝购买，测试两个小时，发现一个小时大概差1秒钟。芯片受温度、电压影响较大。输出结果用串口打印到串口调试助手。如果要oled或者其他显示需要转换为十进制。2.代码部分2.1 led部分-led.h-#ifndef _LED_H#define _LED_H #include sys.hvoid LED_Init(void);/初始化#endif-led.c-#include led.h /LED IO初始化void LED_Init(void) GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2

2、PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); /使能PB端口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; /LED0-PB.5 端口配置 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; /推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /IO口速度为50MHz GPIO_Init(GPIOB, &GPIO_InitStructure);/根据设定参数初始化GPIOB.5 GPIO_SetBits

3、(GPIOB,GPIO_Pin_5);/PB5 输出高2.2 usart部分-usart.h-#ifndef _USART_H#define _USART_H#include stdio.h#include sys.h void uart_init(u32 bound);void usart1_send_string(u8 *BuffToSend);void usart1_sendbyte(u8 data);#endif-usart.c-#include sys.h#include usart.h void uart_init(u32 bound) /GPIO端口设置 GPIO_InitTyp

4、eDef GPIO_InitStructure;USART_InitTypeDef USART_InitStructure;NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);/使能USART1，GPIOA时钟 /USART1_TX GPIOA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; /PA.9 GPIO_InitStructure.GPIO_Speed = GPIO_Spee

5、d_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;/复用推挽输出 GPIO_Init(GPIOA, &GPIO_InitStructure);/初始化GPIOA.9 /USART1_RX GPIOA.10初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;/PA10 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;/浮空输入 GPIO_Init(GPIOA, &GPIO_InitStructure);/初始化GPIOA.10 /Usar

6、t1 NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;/抢占优先级3NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;/子优先级3NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;/IRQ通道使能NVIC_Init(&NVIC_InitStructure);/根据指定的参数初始化VIC寄存器 /USART 初始化设置USART

7、_InitStructure.USART_BaudRate = bound;/串口波特率USART_InitStructure.USART_WordLength = USART_WordLength_8b;/字长为8位数据格式USART_InitStructure.USART_StopBits = USART_StopBits_1;/一个停止位USART_InitStructure.USART_Parity = USART_Parity_No;/无奇偶校验位USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowCon

8、trol_None;/无硬件数据流控制USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;/收发模式 USART_Init(USART1, &USART_InitStructure); /初始化串口1 USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);/开启串口接受中断 USART_Cmd(USART1, ENABLE); /使能串口1 /打印字节void usart1_sendbyte(u8 data)USART_SendData(USART1, data); while(US

9、ART_GetFlagStatus(USART1,USART_FLAG_TC)!= SET);/打印字符串void usart1_send_string(u8 *BuffToSend)u8 i=0; while(BuffToSendi!=0)USART_SendData(USART1, BuffToSendi); while( USART_GetFlagStatus(USART1,USART_FLAG_TC)!= SET); i+; 2.3 ds1302部分-ds1302.h-#ifndef _DS1302_H#define _DS1302_H#include sys.h/写年月日时间寄存器#

10、define WriteSecond 0x80#define WriteMinute 0x82#define WriteHour 0x84#define WriteDay 0x86#define WriteMonth 0x88#define writeWeek 0x8a#define writeYear 0x8c/读年月日时间寄存器#define ReadSecond 0x81#define ReadMinute 0x83#define ReadHour 0x85#define ReadDay 0x87#define ReadMonth 0x89#define ReadWeek 0x8b#de

11、fine ReadYear 0x8d/引脚分配 SDA-PC3 SCL-PC4 RST-PC5#define DS_SDA_IN GPIOC-CRL&=0XFFFF0FFF;GPIOC-CRL|=(u32)8CRL&=0XFFFF0FFF;GPIOC-CRL|=(u32)312;#define DS_SDA_DATA GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_3)/SDA#define DS_SDA_HIGH GPIO_SetBits(GPIOC,GPIO_Pin_3)#define DS_SDA_LOW GPIO_ResetBits(GPIOC,GPIO_Pi

12、n_3)#define DS_SCK_HIGH GPIO_SetBits(GPIOC,GPIO_Pin_4)/SCL#define DS_SCK_LOW GPIO_ResetBits(GPIOC,GPIO_Pin_4)#define DS_RST_HIGH GPIO_SetBits(GPIOC,GPIO_Pin_5)/CE#define DS_RST_LOW GPIO_ResetBits(GPIOC,GPIO_Pin_5)void ds1302_init(void);void write_one_byte(u8 data);u8 read_one_byte(void);void ds1302_

13、write_data(u8 reg,u8 data);u8 ds1302_read_data(u8 reg);void time_init(void);void time_read(void);u8 hex_to_bcd(u8 hex_data);u8 bcd_to_hex(u8 bcd_data);#endif-ds1302.c-#include ds1302.h#include delay.hu8 DSsecond,DSminute,DShour,DSweek,DSday,DSmonth,DSyear;u8 time7=0x18,0x06,0x10,0x19,0x23,0x59,0x30;

14、/年 星期 月 日 时 分 秒void ds1302_init()GPIO_InitTypeDef GPIO_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIO

15、C, &GPIO_InitStructure);GPIO_ResetBits(GPIOC,GPIO_Pin_5);/CE拉低GPIO_SetBits(GPIOC, GPIO_Pin_3|GPIO_Pin_4); /拉高/写入一个字节void write_one_byte(u8 data) u8 i; DS_SDA_OUT; for(i=0;i=1;delay_us(2);/读一个字节u8 read_one_byte() u8 i,data; DS_SDA_IN ; for(i=0;i=1; DS_SCK_HIGH; if(DS_SDA_DATA=1)data|=0x80; elsedata&=

16、0x7F; delay_us(2);DS_SCK_LOW;return data;/ds1302写寄存器写数据void ds1302_write_data(u8 reg,u8 data) DS_SCK_LOW; DS_RST_LOW;/初始rst为低 delay_us(2); DS_RST_HIGH;/sck为低时rst才可置高 write_one_byte(reg); /sck低到高 delay_us(5); DS_SCK_LOW; write_one_byte(data); /sck低到高 delay_us(5);/DS_SCK_HIGH; DS_RST_LOW;/读ds1302寄存器数据

17、u8 ds1302_read_data(u8 reg) u8 temp; DS_SCK_LOW; DS_RST_LOW;/初始rst为低 delay_us(2); DS_RST_HIGH;/sck为低时rst才可置高 delay_us(2); write_one_byte(reg); /sck低到高 delay_us(5); DS_SCK_LOW;temp=read_one_byte(); /sck由高到低delay_us(5);/DS_SCK_HIGH; DS_RST_LOW; return temp;u8 hex_to_bcd(u8 hex_data)u8 temp; temp=(hex_

18、data/10*16 + hex_data%10); return temp; u8 bcd_to_hex(u8 bcd_data) u8 temp; temp=(bcd_data/16*10 + bcd_data%16); return temp; /time初始化void time_init()ds1302_write_data(0x8e,0x00);/关闭写保护ds1302_write_data(writeYear ,(time0);/写入hex格式数据 ds1302_write_data(writeWeek,(time1); ds1302_write_data(WriteMonth,(

19、time2); ds1302_write_data(WriteDay,(time3); ds1302_write_data(WriteHour,(time4); ds1302_write_data(WriteMinute,(time5);/ ds1302_write_data(WriteSecond,(time6);/ds1302_write_data(0x8e,0x80);/开启写保护/读取寄存器时间void time_read() DSyear=ds1302_read_data(ReadYear); DSweek=ds1302_read_data(ReadWeek); DSmonth=ds1302_read_data(ReadMonth); DSday=ds1302_read_data(ReadDay); DShour=ds1302_read_data(ReadHour); DSminute=ds1302_read_data(ReadMinute); DSsecond=ds1302_read_data(ReadSe