stm32e10系列单片机做个ds3231的驱动
时间: 2023-09-03 12:06:52 浏览: 95
好的,下面是基于STM32E10系列单片机的DS3231驱动代码示例。
首先需要了解DS3231芯片的通信方式,DS3231采用I2C通信方式,需要连接SDA和SCL两个引脚。其中,SDA为数据线,SCL为时钟线。
以下是DS3231驱动代码示例:
```c
#include "main.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "ds3231.h"
#include "i2c.h"
#define DS3231_ADDRESS 0xD0 // DS3231芯片地址
uint8_t DS3231_Write(uint8_t reg_address, uint8_t data)
{
uint8_t buf[2];
buf[0] = reg_address;
buf[1] = data;
return HAL_I2C_Master_Transmit(&hi2c1, DS3231_ADDRESS, buf, 2, 1000);
}
uint8_t DS3231_Read(uint8_t reg_address)
{
uint8_t data;
HAL_I2C_Master_Transmit(&hi2c1, DS3231_ADDRESS, ®_address, 1, 1000);
HAL_I2C_Master_Receive(&hi2c1, DS3231_ADDRESS, &data, 1, 1000);
return data;
}
void DS3231_Init(void)
{
// 设置时钟输出
DS3231_Write(DS3231_CONTROL_REG, DS3231_CONTROL_REG_SQWAVE_1HZ);
// 清除报警标志
DS3231_Write(DS3231_STATUS_REG, 0x00);
}
void DS3231_SetTime(uint8_t hour, uint8_t minute, uint8_t second)
{
// 设置小时
uint8_t hour_bcd = (((hour / 10) << 4) | (hour % 10));
DS3231_Write(DS3231_HOUR_REG, hour_bcd);
// 设置分钟
uint8_t minute_bcd = (((minute / 10) << 4) | (minute % 10));
DS3231_Write(DS3231_MINUTE_REG, minute_bcd);
// 设置秒钟
uint8_t second_bcd = (((second / 10) << 4) | (second % 10));
DS3231_Write(DS3231_SECOND_REG, second_bcd);
}
void DS3231_GetTime(uint8_t *hour, uint8_t *minute, uint8_t *second)
{
// 获取小时
uint8_t hour_bcd = DS3231_Read(DS3231_HOUR_REG);
*hour = ((hour_bcd >> 4) * 10 + (hour_bcd & 0x0F));
// 获取分钟
uint8_t minute_bcd = DS3231_Read(DS3231_MINUTE_REG);
*minute = ((minute_bcd >> 4) * 10 + (minute_bcd & 0x0F));
// 获取秒钟
uint8_t second_bcd = DS3231_Read(DS3231_SECOND_REG);
*second = ((second_bcd >> 4) * 10 + (second_bcd & 0x0F));
}
void DS3231_SetDate(uint8_t year, uint8_t month, uint8_t day)
{
// 设置年份
uint8_t year_bcd = (((year / 10) << 4) | (year % 10));
DS3231_Write(DS3231_YEAR_REG, year_bcd);
// 设置月份
uint8_t month_bcd = (((month / 10) << 4) | (month % 10));
DS3231_Write(DS3231_MONTH_REG, month_bcd);
// 设置日期
uint8_t day_bcd = (((day / 10) << 4) | (day % 10));
DS3231_Write(DS3231_DAY_REG, day_bcd);
}
void DS3231_GetDate(uint8_t *year, uint8_t *month, uint8_t *day)
{
// 获取年份
uint8_t year_bcd = DS3231_Read(DS3231_YEAR_REG);
*year = ((year_bcd >> 4) * 10 + (year_bcd & 0x0F));
// 获取月份
uint8_t month_bcd = DS3231_Read(DS3231_MONTH_REG);
*month = ((month_bcd >> 4) * 10 + (month_bcd & 0x0F));
// 获取日期
uint8_t day_bcd = DS3231_Read(DS3231_DAY_REG);
*day = ((day_bcd >> 4) * 10 + (day_bcd & 0x0F));
}
```
上述代码中,`DS3231_Write`和`DS3231_Read`函数用于向DS3231芯片写入数据和读取数据。`DS3231_Init`函数用于初始化DS3231芯片。`DS3231_SetTime`和`DS3231_GetTime`函数用于设置和获取时间,其中时间以小时、分钟和秒钟表示。`DS3231_SetDate`和`DS3231_GetDate`函数用于设置和获取日期,其中日期以年、月和日表示。
希望这个示例代码可以帮到你。
阅读全文