传感器调试总结

光线距离

LTR-553ALS-WA

• 规格书 LTR-553ALS-WA_2019-07-29.PDF

• 原理图

  

• 驱动移植代码 ltr559-易景.rar

• 调试问题总结

  • 光线传感器需要调整在暗环境下的灵敏度，修改0x80寄存器LTR559_ALS_CONTR，调节als的gain

    

    调整光线传感器灵敏度驱动代码修改2处

    第一处：

    static int ltr559_als_enable(struct i2c_client *client, int enable)
    {
        //struct ltr559_priv *obj = i2c_get_clientdata(client);
        int err=0;
        u8 regdata=0;
        //if (enable == obj->als_enable)
        //return 0;
    
        regdata = ltr559_i2c_read_reg(LTR559_ALS_CONTR);
    
        if (enable == 1) {
            APS_LOG("ALS(1): enable als only \n");
            regdata = 0x1c;                                                         // 修改此值
            err = ltr559_i2c_write_reg(LTR559_ALS_CONTR, regdata);
        } else {
            APS_LOG("ALS(1): disable als only \n");
            regdata = 0x00;
            err = ltr559_i2c_write_reg(LTR559_ALS_CONTR, regdata);
        }
    
        if(err<0)
        {
            APS_ERR("ALS: enable als err: %d en: %d \n", err, enable);
            return err;
        }
    
        //obj->als_enable = enable;
    
        msleep(WAKEUP_DELAY);
    
        return 0;
    
    }
    

    第二处：

    // Enable ALS to Full Range at startup
        als_gainrange = ALS_RANGE_600;                      /*ALS_RANGE_1300;*/ //修改这里，让gain变为最灵敏的0x1c， LTR559_ALS_CONTR = 0x80
    
        init_als_gain = als_gainrange;
    
        switch (init_als_gain)
        {
            case ALS_RANGE_64K:
                res = ltr559_i2c_write_reg(LTR559_ALS_CONTR, MODE_ALS_Range1);
                break;
    
            case ALS_RANGE_32K:
                res = ltr559_i2c_write_reg(LTR559_ALS_CONTR, MODE_ALS_Range2);
                break;
    
            case ALS_RANGE_16K:
                res = ltr559_i2c_write_reg(LTR559_ALS_CONTR, MODE_ALS_Range3);
                break;
    
            case ALS_RANGE_8K:
                res = ltr559_i2c_write_reg(LTR559_ALS_CONTR, MODE_ALS_Range4);
                break;
    
            case ALS_RANGE_1300:
                res = ltr559_i2c_write_reg(LTR559_ALS_CONTR, MODE_ALS_Range5);
                break;
    
            case ALS_RANGE_600:
                res = ltr559_i2c_write_reg(LTR559_ALS_CONTR, MODE_ALS_Range6);
                break;
    
            default:
                res = ltr559_i2c_write_reg(LTR559_ALS_CONTR, MODE_ALS_Range1);
                APS_ERR("proxmy sensor gainrange %d!\n", init_als_gain);
                break;
        }
    

    抓取log查看暗环境als值，修改dts里面的值对应关系

重力

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