用rt_thread,hal库,用stm32f407vet6完成i2c读写时钟芯片HYM8563的完整代码,PB6为scl,pb7为sda
时间: 2024-03-01 10:51:49 浏览: 85
以下是使用 RT-Thread 和 HAL 库,通过 I2C 总线读写时钟芯片 HYM8563 的完整代码,PB6 为 SCL,PB7 为 SDA:
```c
#include <rtthread.h>
#include <rtdevice.h>
#include "stm32f4xx_hal.h"
#include "hym8563.h"
#define I2C_BUS_NAME "i2c1" // I2C 总线名称
#define I2C_SLAVE_ADDR 0xD0 // 时钟芯片 HYM8563 的地址
static struct rt_i2c_bus_device *i2c_bus = RT_NULL;
/* 初始化 I2C 总线 */
static int i2c_bus_init(void)
{
struct rt_i2c_bus_device *i2c_bus;
/* 获取 I2C 总线设备 */
i2c_bus = rt_i2c_bus_device_find(I2C_BUS_NAME);
if (i2c_bus == RT_NULL)
{
rt_kprintf("I2C bus %s not found!\n", I2C_BUS_NAME);
return -1;
}
/* 打开 I2C 总线 */
if (rt_i2c_bus_device_open(i2c_bus) != RT_EOK)
{
rt_kprintf("Open I2C bus %s failed!\n", I2C_BUS_NAME);
return -1;
}
return 0;
}
/* 读取时钟芯片 HYM8563 的时间 */
int hym8563_read_time(struct hym8563_time *t)
{
rt_uint8_t buf[7];
rt_size_t size;
/* 发送读取命令 */
if (rt_i2c_master_send(i2c_bus, I2C_SLAVE_ADDR, &t->sec_addr, 1) != 1)
{
rt_kprintf("Send read command failed!\n");
return -1;
}
/* 读取数据 */
size = rt_i2c_master_recv(i2c_bus, I2C_SLAVE_ADDR, buf, sizeof(buf));
if (size != sizeof(buf))
{
rt_kprintf("Read data failed!\n");
return -1;
}
/* 解析数据 */
t->sec = BCD2BIN(buf[0] & 0x7F);
t->min = BCD2BIN(buf[1] & 0x7F);
t->hour = BCD2BIN(buf[2] & 0x3F);
t->day = BCD2BIN(buf[3] & 0x3F);
t->week = BCD2BIN(buf[4] & 0x07);
t->month = BCD2BIN(buf[5] & 0x1F);
t->year = BCD2BIN(buf[6]) + 2000;
return 0;
}
/* 设置时钟芯片 HYM8563 的时间 */
int hym8563_set_time(const struct hym8563_time *t)
{
rt_uint8_t buf[8];
/* 构造写入数据 */
buf[0] = t->sec_addr;
buf[1] = BIN2BCD(t->sec);
buf[2] = BIN2BCD(t->min);
buf[3] = BIN2BCD(t->hour);
buf[4] = BIN2BCD(t->day);
buf[5] = BIN2BCD(t->week);
buf[6] = BIN2BCD(t->month);
buf[7] = BIN2BCD(t->year - 2000);
/* 发送写入命令和数据 */
if (rt_i2c_master_send(i2c_bus, I2C_SLAVE_ADDR, buf, sizeof(buf)) != sizeof(buf))
{
rt_kprintf("Write data failed!\n");
return -1;
}
return 0;
}
/* HYM8563 时钟芯片测试 */
int hym8563_test(void)
{
struct hym8563_time t;
/* 初始化 I2C 总线 */
if (i2c_bus_init() != 0)
{
return -1;
}
/* 读取时间 */
if (hym8563_read_time(&t) != 0)
{
return -1;
}
/* 输出时间 */
rt_kprintf("%04d-%02d-%02d %02d:%02d:%02d, week %d\n",
t.year, t.month, t.day, t.hour, t.min, t.sec, t.week);
/* 修改时间 */
t.year = 2022;
t.month = 8;
t.day = 1;
t.hour = 12;
t.min = 0;
t.sec = 0;
t.week = 7;
if (hym8563_set_time(&t) != 0)
{
return -1;
}
return 0;
}
```
在以上代码中,我们使用了 `hym8563.h` 头文件,其中包含了一些常量和宏定义,用于解析 HYM8563 的时间数据。`hym8563.c` 文件的内容如下:
```c
#include "hym8563.h"
/* BCD 转二进制 */
rt_uint8_t BCD2BIN(rt_uint8_t val)
{
return (val & 0x0F) + ((val >> 4) * 10);
}
/* 二进制转 BCD */
rt_uint8_t BIN2BCD(rt_uint8_t val)
{
return ((val / 10) << 4) + (val % 10);
}
```
在以上代码中,我们定义了两个函数,用于将 BCD 码转换为二进制和将二进制转换为 BCD 码。这两个函数在解析 HYM8563 的时间数据时会用到。
需要注意的是,以上代码仅供参考,具体的实现方式可能与你的硬件和软件环境有关。你需要根据自己的实际情况进行修改和调整。
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