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https://gitee.com/peng_zhihui/HoloCubic
synced 2025-11-04 21:19:40 +08:00
[Fw] Ad ambient-light sensor filter.
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e97da51439
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@ -3,7 +3,19 @@
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void Ambient::init(int mode)
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{
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mMode = mode;
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switch (mode)
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{
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case ONE_TIME_H_RESOLUTION_MODE:
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sample_time = 125;
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break;
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case ONE_TIME_H_RESOLUTION_MODE2:
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sample_time = 125;
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break;
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case ONE_TIME_L_RESOLUTION_MODE:
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sample_time = 20;
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break;
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}
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Wire.begin(AMB_I2C_SDA, AMB_I2C_SCL);
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}
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@ -13,26 +25,24 @@ unsigned int Ambient::getLux()
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Wire.write(ONE_TIME_L_RESOLUTION_MODE); //set operation mode
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Wire.endTransmission();
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switch (mMode)
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if (millis() - last_time > sample_time)
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{
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case ONE_TIME_H_RESOLUTION_MODE:
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delay(125);
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break;
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case ONE_TIME_H_RESOLUTION_MODE2:
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delay(125);
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break;
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case ONE_TIME_L_RESOLUTION_MODE:
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delay(20);
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break;
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Wire.requestFrom(ADDRESS_BH1750FVI, 2); //ask Arduino to read back 2 bytes from the sensor
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highByte = Wire.read(); // get the high byte
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lowByte = Wire.read(); // get the low byte
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sensorOut = (highByte << 8) | lowByte;
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illuminance = sensorOut / 1.2;
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for (int i = 4; i > 0; i--) lux[i] = lux[i - 1];
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lux[0] = illuminance;
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}
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Wire.requestFrom(ADDRESS_BH1750FVI, 2); //ask Arduino to read back 2 bytes from the sensor
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highByte = Wire.read(); // get the high byte
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lowByte = Wire.read(); // get the low byte
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unsigned int avg;
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for (int i = 4; i >= 0; i--) avg += lux[i];
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avg /= 5;
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sensorOut = (highByte << 8) | lowByte;
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illuminance = sensorOut / 1.2;
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return illuminance;
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return avg;
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}
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@ -14,11 +14,15 @@
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class Ambient
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{
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private:
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int mMode;
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unsigned char highByte = 0;
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unsigned char lowByte = 0;
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unsigned int sensorOut = 0;
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unsigned int illuminance = 0;
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unsigned int lux[5];
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long sample_time = 125;
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long last_time;
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public:
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void init(int mode);
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unsigned int getLux();
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