tsl2561cs Pacer Components, tsl2561cs Datasheet - Page 23

• Manufacturer Part Number: tsl2561cs
• Description: Light-to-digital Converter
• Manufacturer: Pacer Components

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#define LUX_SCALE
#define RATIO_SCALE 9
//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
// Integration time scaling factors
//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
#define CH_SCALE
#define CHSCALE_TINT0
#define CHSCALE_TINT1
//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
// T Package coefficients
//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
// For Ch1/Ch0=0.00 to 0.50
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// For Ch1/Ch0=0.50 to 0.61:
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// For Ch1/Ch0=0.61 to 0.80:
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// For Ch1/Ch0=0.80 to 1.30:
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// For Ch1/Ch0>1.3:
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//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
#define K1T
#define B1T
#define M1T
#define K2T
The LUMENOLOGY r Company
Copyright E 2004−2005 TAOS, Inc.
THIS CODE AND INFORMATION IS PROVIDED ”AS IS” WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
PURPOSE.
Module Name:
lux.cpp
Lux/Ch0=0.0304−0.062*((Ch1/Ch0)^1.4)
piecewise approximation
Lux/Ch0=0.0224−0.031*(Ch1/Ch0)
Lux/Ch0=0.0128−0.0153*(Ch1/Ch0)
Lux/Ch0=0.00146−0.00112*(Ch1/Ch0)
Lux/Ch0=0
0x0040
0x01f2
0x01be
0x0080
14
For Ch1/Ch0=0.00 to 0.125:
For Ch1/Ch0=0.125 to 0.250:
For Ch1/Ch0=0.250 to 0.375:
For Ch1/Ch0=0.375 to 0.50:
// scale by 2^14
// scale ratio by 2^9
10
0x7517 // 322/11 * 2^CH_SCALE
0x0fe7 // 322/81 * 2^CH_SCALE
Lux/Ch0=0.0304−0.0272*(Ch1/Ch0)
Lux/Ch0=0.0325−0.0440*(Ch1/Ch0)
Lux/Ch0=0.0351−0.0544*(Ch1/Ch0)
Lux/Ch0=0.0381−0.0624*(Ch1/Ch0)
// 0.125 * 2^RATIO_SCALE
// 0.0304 * 2^LUX_SCALE
// 0.0272 * 2^LUX_SCALE
// 0.250 * 2^RATIO_SCALE
// scale channel values by 2^10
r
www.taosinc.com
LIGHT-TO-DIGITAL CONVERTER
r
TSL2560, TSL2561
TAOS059L − JANUARY 2008
Copyright E 2008, TAOS Inc.
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