X-Git-Url: https://git.smho.de/gw/?p=owSlave2.git;a=blobdiff_plain;f=common%2FI2C%2FMAX44009.c;h=3340dbb71644a925726604d83743b39185477cd3;hp=8ec682d5cef1ee0cf6011d6d465be84d58921737;hb=refs%2Fheads%2Fmaster;hpb=6aa7a2df05f4f65bf6c7260487a470798a5ed1b1 diff --git a/common/I2C/MAX44009.c b/common/I2C/MAX44009.c index 8ec682d..3340dbb 100644 --- a/common/I2C/MAX44009.c +++ b/common/I2C/MAX44009.c @@ -1,69 +1,85 @@ -// Copyright (c) 2015, Tobias Mueller tm(at)tm3d.de -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above copyright -// notice, this list of conditions and the following disclaimer in the -// documentation and/or other materials provided with the -// distribution. -// * All advertising materials mentioning features or use of this -// software must display the following acknowledgement: This product -// includes software developed by tm3d.de and its contributors. -// * Neither the name of tm3d.de nor the names of its contributors may -// be used to endorse or promote products derived from this software -// without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -#define F_CPU 8000000UL -#include - -#include - - -#include "USI_TWI_Master.h" -#include "MAX44009.h" - -double MAX44009getlux(uint8_t nr) { - volatile uint8_t b1,b2; - nr=(nr<<1)&0x02f; - - I2c_StartCondition(); - I2c_WriteByte(0b10010100|nr); - I2c_WriteByte(0x03); - I2c_StartCondition(); - I2c_WriteByte (0b10010101|nr); - b1 =I2c_ReadByte(NO_ACK); - I2c_StopCondition(); - I2c_StartCondition(); - I2c_WriteByte(0b10010100|nr); - I2c_WriteByte(0x04); - I2c_StartCondition(); - I2c_WriteByte (0b10010101|nr); - b2 =I2c_ReadByte(NO_ACK); - I2c_StopCondition(); - uint8_t exponent = (b1 & 0xF0) >> 4;// upper four bits of high byte register - uint8_t mantissa = (b1 & 0x0F) << 4;// lower four bits of high byte register = - // upper four bits of mantissa - mantissa += b2 & 0x0F; // lower four bits of low byte register = - // lower four bits of mantissa - - return (double)mantissa * (double)(1 << (uint16_t)exponent) * 0.045; - - - -} +// Copyright (c) 2015, Tobias Mueller tm(at)tm3d.de +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the +// distribution. +// * All advertising materials mentioning features or use of this +// software must display the following acknowledgement: This product +// includes software developed by tm3d.de and its contributors. +// * Neither the name of tm3d.de nor the names of its contributors may +// be used to endorse or promote products derived from this software +// without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +#define F_CPU 8000000UL +#include + +#include + + +#include "TWI_Master.h" +#include "MAX44009.h" + +uint8_t checkMAX44009(uint8_t nr) { + volatile uint8_t b1; + nr=(nr<<1)&0x02f; + + I2c_StartCondition(); + I2c_WriteByte(0b10010100|nr); + I2c_WriteByte(0x03); + I2c_StartCondition(); + I2c_WriteByte (0b10010101|nr); + b1 =I2c_ReadByte(NO_ACK); + I2c_StopCondition(); + return b1!=0xFF; + +} + + +double MAX44009getlux(uint8_t nr) { + volatile uint8_t b1,b2; + nr=(nr<<1)&0x02f; + + I2c_StartCondition(); + I2c_WriteByte(0b10010100|nr); + I2c_WriteByte(0x03); + I2c_StartCondition(); + I2c_WriteByte (0b10010101|nr); + b1 =I2c_ReadByte(NO_ACK); + I2c_StopCondition(); + I2c_StartCondition(); + I2c_WriteByte(0b10010100|nr); + I2c_WriteByte(0x04); + I2c_StartCondition(); + I2c_WriteByte (0b10010101|nr); + b2 =I2c_ReadByte(NO_ACK); + I2c_StopCondition(); + uint8_t exponent = (b1 & 0xF0) >> 4;// upper four bits of high byte register + uint8_t mantissa = (b1 & 0x0F) << 4;// lower four bits of high byte register = + // upper four bits of mantissa + mantissa += b2 & 0x0F; // lower four bits of low byte register = + // lower four bits of mantissa + + return (double)mantissa * (double)(1 << (uint16_t)exponent) * 0.045; + + + +}