29 lines
531 B
C
29 lines
531 B
C
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/*
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* Driver for BH1750 light sensor
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*
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* Part of esp-open-rtos
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* Copyright (C) 2017 Andrej Krutak <dev@andree.sk>
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* BSD Licensed as described in the file LICENSE
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*/
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#include "bh1750.h"
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#include <i2c/i2c.h>
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#include <stdio.h>
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void bh1750_configure(uint8_t addr, uint8_t mode)
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{
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i2c_slave_write(addr, NULL, &mode, 1);
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}
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uint16_t bh1750_read(uint8_t addr)
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{
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uint8_t buf[2];
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uint16_t level;
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i2c_slave_read(addr, NULL, buf, 2);
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level = buf[0] << 8 | buf[1];
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level = (level * 10) / 12; // convert to LUX
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return level;
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}
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