5 使用at24cxx读写的问题

发布于 2024-08-09 09:46:31 浏览：378 订阅该版

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yc961213911 2024-08-09

这家伙很懒

菜鸟攻城狮 2024-08-09

这家伙很懒，什么也没写！

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梦笑真美 2024-08-09

这家伙很懒，什么也没写！

菜鸟攻城狮 2024-08-09

这家伙很懒，什么也没写！

初始化IIC总线得时候报了这个错误，有知道是什么原因得嘛？
![1723201358618(1).jpg](https://oss-club.rt-thread.org/uploads/20240809/285bbd59daf427266f91e1bf985a057e.jpg)
下面这是我的代码#include <rtthread.h>
#include <board.h>
#include <at24cxx.h>
#include <rtdevice.h>

#define EEPROM_I2C_BUS_NAME      "i2c1" // 根据实际配置修改 I2C 总线名称
#define EEPROM_ADDR              0xA1    // AT24C02 的 地址  1010  0001 读
struct rt_i2c_bus_device *i2c_bus;

#define LED1 GET_PIN(B,5)
#define LED2 GET_PIN(B,8)

int main(void)
{
    at24cxx_device_t at24c02_dev;
    rt_hw_i2c_init_1();

at24c02_dev = at24cxx_init(EEPROM_I2C_BUS_NAME, EEPROM_ADDR); /* 初始化 AT24C02 EEPROM 设备 */

if (at24c02_dev == RT_NULL)
    {
        rt_kprintf("Failed to initialize AT24C02 EEPROM device.\n");
        return -1;
    }
    rt_pin_mode(LED1, PIN_MODE_OUTPUT);
    rt_pin_mode(LED2, PIN_MODE_OUTPUT);
    uint8_t read_data[4];// 定义读取缓冲区
    int q = 0;// 定义整数型变量 q 用于存储读取的结果
    rt_err_t result = at24cxx_read(at24c02_dev, 0, read_data, sizeof(read_data));// 使用 at24cxx_read() 函数读取数据
    if (result == RT_EOK)
    {
        // 将读取的字节序列重新组合成整数
        q = ((read_data[0] << 24) & 0xFF000000) |
            ((read_data[1] << 16) & 0x00FF0000) |
            ((read_data[2] << 8)  & 0x0000FF00) |
            (read_data[3] & 0x000000FF);

rt_kprintf("Integer q read from AT24C02: %d\n", q);
    }
    else
    {
        rt_kprintf("Failed to read integer q from AT24C02.\n");
    }

while(1)
    {

if(q <= 10)
    {
    rt_pin_write(LED1, PIN_LOW);
    q=q+1;
    }
    rt_thread_mdelay(1000);

uint8_t data[4];
    data[0] = (q >> 24) & 0xFF; // 存储 q 的最高字节
    data[1] = (q >> 16) & 0xFF;
    data[2] = (q >> 8)  & 0xFF;
    data[3] = q & 0xFF;        // 存储 q 的最低字节

rt_err_t result = at24cxx_write(at24c02_dev, 0, data, sizeof(data));

if (result == RT_EOK)
    {
        rt_kprintf("Integer q written to AT24C02 successfully.\n");
    }
    else
    {
        rt_kprintf("Failed to write integer q to AT24C02.\n");
    }

rt_pin_write(LED1, PIN_HIGH);
    rt_pin_write(LED2, PIN_HIGH);
    rt_thread_mdelay(1000);
    if (q > 10)
    {
    rt_pin_write(LED2, PIN_LOW);
    rt_thread_mdelay(5000);
    rt_pin_write(LED2, PIN_HIGH);
    q=0;
    }
    }
    return 0;
}

int rt_hw_i2c_init_1(void)
{

/* 查找 I2C 总线设备 */
        i2c_bus = (struct rt_i2c_bus_device *)rt_device_find(EEPROM_I2C_BUS_NAME);
        if (i2c_bus == RT_NULL)
        {
            rt_kprintf("I2C bus %s not found!\n", EEPROM_I2C_BUS_NAME);
            return -RT_ERROR;
        }

/* 初始化 I2C 总线 */
        rt_i2c_bus_device_init(i2c_bus, EEPROM_I2C_BUS_NAME);

rt_kprintf("I2C bus %s initialized OK!\n", EEPROM_I2C_BUS_NAME);

return RT_EOK;
}