添加AHT10温湿度传感器无法通讯
本帖最后由 kiswih 于 2019-10-29 11:01 编辑使用AHT10温湿度传感器接入在AIO-3399C(AI)的I2C7号通道，设备寄存器地址是0x38，但是我调用i2c_master_send函数时返回-6（没有设备）错误，请问各位大神我应该如何正确使用呢？
DTS配置如下：
&i2c7 {
status = "okay";
aht10: aht10@38 {
status = "okay";
compatible = "thinary,aht10";
reg = <0x38>;
};
};
驱动代码：
static AHT10_R writeandread(const const char *cmd, size_t cmdsize, uint8_t *buffer, int readsize)
{
int rtn;
struct i2c_client *client = this_client;
if (!client)
return AHT10_BAD;
rtn = i2c_master_send(client, cmd, cmdsize); //返回-6
if (rtn != cmdsize)
{
printk("ERROR sending command %d\n", rtn);
return AHT10_WRITE_FAILED;
}
if (readsize > 0)
{
mdelay(100);
rtn = i2c_master_recv(client, buffer, readsize);
if (rtn < readsize)
return AHT10_READ_FAILED;
}
return AHT10_OK;
}
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