为什么获取到的三轴数据一直都是0？求助

[cuboart]

[使用I2c1总线，mpu6050，bpm180，hmc5983l,除了hmc5983其他两个传感器都能读出数据。初始化，注册设备都没有问题。就是hmc5983读出的数据为0(无论是命令行读取还是代码读取)，.在arduino中可以读出三轴数据，排除设备坏掉了。

[cuboart]

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[cuboart]

初始化的代码：

//init hmc5983
static int rt_hw_hmc5983_port(void)
{
struct rt_sensor_config cfg;
cfg.intf.dev_name = "i2c1"; /* i2c bus */
cfg.intf.user_data = (void )HMC5883_ADDR; / i2c slave addr */
rt_hw_hmc5883_init("hmc",&cfg);
return RT_EOK;
}
INIT_ENV_EXPORT(rt_hw_hmc5983_port);

创建进程代码

int main{
//hmc5983
hmc5983_thread = rt_thread_create("hmc_pro",
read_hmc5983_entry,
I2C_BUS_NAME,
1024,
RT_THREAD_PRIORITY_MAX / 2,
20);
if (hmc5983_thread != RT_NULL)
{
rt_thread_startup(hmc5983_thread);
}
}
static void read_hmc5983_entry(void *parameter)
{
rt_device_t dev = RT_NULL;
struct rt_sensor_data sensor_data;
rt_size_t res;
dev = rt_device_find("mag_hmc");
if (dev == RT_NULL)
{
rt_kprintf("Can't find device:%s\n", "mag_hmc");
return;
}
if (rt_device_open(dev, RT_DEVICE_FLAG_RDWR) != RT_EOK)
{
rt_kprintf("open device failed!\n");
return;
}
while (1)
{
res = rt_device_read(dev, 0, &sensor_data, 1);
if (res != 1)
{
rt_kprintf("read data failed!size is %d\n", res);
rt_device_close(dev);
return;
}
else
{
rt_kprintf("hmc5983l:%d,%d,%d,%5d\n",sensor_data.data.mag.x, sensor_data.data.mag.y, sensor_data.data.mag.z, sensor_data.timestamp);
}
rt_thread_mdelay(100);
}
}