OneWire DS18B20,DS2450,MAX31850

Dependents:   MAX31850_HelloWorld

Files at this revision

API Documentation at this revision

Comitter:
fblanc
Date:
Thu Feb 12 14:03:55 2015 +0000
Commit message:
MAX31850 ok

Changed in this revision

DS18X20.cpp Show annotated file Show diff for this revision Revisions of this file
DS18X20.h Show annotated file Show diff for this revision Revisions of this file
DS2450.cpp Show annotated file Show diff for this revision Revisions of this file
DS2450.h Show annotated file Show diff for this revision Revisions of this file
Horner_ITS90.h Show annotated file Show diff for this revision Revisions of this file
MAX31850.cpp Show annotated file Show diff for this revision Revisions of this file
MAX31850.h Show annotated file Show diff for this revision Revisions of this file
crc16.cpp Show annotated file Show diff for this revision Revisions of this file
crc16.h Show annotated file Show diff for this revision Revisions of this file
crc8.cpp Show annotated file Show diff for this revision Revisions of this file
crc8.h Show annotated file Show diff for this revision Revisions of this file
onewire.cpp Show annotated file Show diff for this revision Revisions of this file
onewire.h Show annotated file Show diff for this revision Revisions of this file
utils.cpp Show annotated file Show diff for this revision Revisions of this file
utils.h Show annotated file Show diff for this revision Revisions of this file
diff -r 000000000000 -r 9acbbb021a43 DS18X20.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DS18X20.cpp	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,350 @@
+/**
+* @file DS18x20.c
+* @brief library of DS18X20 1-Wire digital thermometer (http://www.maxim-ic.com/datasheet/index.mvp/id/2812)
+* @author Maciej Rajtar (Published 10 May 2010 www.mbed.org)
+* @author Frederic BLANC (Published 01/03/2012 www.mbed.org)
+*/
+#include "mbed.h"
+#include "onewire.h"
+#include "DS18X20.h"
+#include "crc8.h"
+#include "utils.h"
+//**********************************************************************************************************
+//*                                  DS18X20_show_temp
+//**********************************************************************************************************
+
+/**
+*     @brief DS18X20_show_temp
+*    @param  [in] id[] = rom_code
+*    @param  [in] n number of id[n]
+*    @param  [out] text temp in degre celsius
+
+*     @date 20/06/2011
+*/
+void DS18X20_show_temp(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits,char *text) {
+    uint16_t decicelsius;
+    char s[10];
+    float temperature;
+    sprintf(text,"");
+    sprintf(s,"%s", (subzero)?"-":"");
+    strcat(text,s);
+    decicelsius = DS18X20_temp_to_decicel(subzero, cel, cel_frac_bits);
+    temperature = decicelsius;
+    temperature = temperature/10;
+    sprintf(s,"%4.1f", temperature);
+    strcat(text,s);
+
+}
+/**
+*     @brief DS18X20_show_temp
+*    @param  [in] id[] = rom_code
+*    @param  [in] n number of id[n]
+*    @return temp in degre celsius
+
+*     @date 21/10/2011
+*/
+float DS18X20_temp(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits) {
+    return ((subzero)?-1:1)*DS18X20_temp_to_decicel(subzero, cel, cel_frac_bits)/10;
+}
+//**********************************************************************************************************
+//*                                  DS18X20_get_power_status
+//**********************************************************************************************************
+ 
+/**
+*     @brief get power status of DS18x20
+*    @param  [in] id[] = rom_code
+*    @return DS18X20_POWER_EXTERN or DS18X20_POWER_PARASITE
+*     @date 20/06/2011
+*/
+uint8_t DS18X20_get_power_status(uint8_t id[]) {
+    uint8_t pstat;
+    ow_reset();
+    ow_command(DS18X20_READ_POWER_SUPPLY, id);
+    pstat=ow_bit_io(1); // pstat 0=is parasite/ !=0 ext. powered
+    ow_reset();
+    return (pstat) ? DS18X20_POWER_EXTERN:DS18X20_POWER_PARASITE;
+}
+
+/**
+*     @brief get power status of DS18x20
+*    @param  [in] n num bus onewire
+*    @param  [in] id[] = rom_code
+*    @return DS18X20_POWER_EXTERN or DS18X20_POWER_PARASITE
+*     @date 6/09/2011
+*/
+uint8_t DS18X20_get_power_status(uint8_t n,uint8_t id[]) {
+    uint8_t pstat;
+    ow_reset(n);
+    ow_command(n,DS18X20_READ_POWER_SUPPLY, id);
+    pstat=ow_bit_io(n,1); // pstat 0=is parasite/ !=0 ext. powered
+    ow_reset(n);
+    return (pstat) ? DS18X20_POWER_EXTERN:DS18X20_POWER_PARASITE;
+}
+//**********************************************************************************************************
+//*                                  DS18X20_start_meas
+//**********************************************************************************************************
+/**
+*   @brief reads temperature (scratchpad) of sensor with rom-code id
+   output: subzero==1 if temp.<0, cel: full celsius, mcel: frac
+   in millicelsius*0.1
+   i.e.: subzero=1, cel=18, millicel=5000 = -18,5000&#65533;C
+*    @param  [in] n num bus onewire
+*    @param  [in] id[] = rom_code
+*    @param  [out] temperature
+*    @return DS18X20_OK or DS18X20_ERROR_CRC
+*     @date 07/12/2012
+*/
+uint8_t DS18X20_read_meas(uint8_t n,uint8_t id[], float* temperature) {
+    uint8_t i;
+    uint8_t sp[DS18X20_SP_SIZE];
+    uint8_t subzero;
+    uint8_t cel;
+    uint8_t cel_frac_bits;
+    
+    ow_reset(n);
+    ow_command(n,DS18X20_READ, id);
+    for ( i=0 ; i< DS18X20_SP_SIZE; i++ )
+        sp[i]=ow_byte_rd(n);
+    if ( crc8( &sp[0], DS18X20_SP_SIZE ) ){
+          if ((sp[DS18X20_SP_SIZE-1]==0xFF) && (sp[DS18X20_SP_SIZE-2]==0xFF))
+            return OW_ERROR;    // bus error
+        return DS18X20_ERROR_CRC;    // data error
+    }
+        
+    DS18X20_meas_to_cel(id[0], sp, &subzero, &cel, &cel_frac_bits);
+    *temperature = cel_frac_bits*.0625;
+    *temperature += cel;
+    if (subzero)
+       *temperature *= -1; 
+    return DS18X20_OK;
+}
+/**
+*   @brief start measurement (CONVERT_T) for all sensors if input id==NULL
+   or for single sensor. then id is the rom-code
+*    @param  [in] with_power_extern
+*    @param  [in] rom_code
+*    @return DS18X20_OK or DS18X20_START_FAIL
+*     @date 20/06/2011
+*/
+uint8_t DS18X20_start_meas( uint8_t with_power_extern, uint8_t id[]) {
+    ow_reset(); //**
+    if ( ow_test_pin() ) { // only send if bus is "idle" = high
+        ow_command( DS18X20_CONVERT_T, id );
+        if (with_power_extern != DS18X20_POWER_EXTERN)
+            ow_parasite_enable();
+        return DS18X20_OK;
+    }
+    return DS18X20_START_FAIL;
+
+}
+/**
+*   @brief start measurement (CONVERT_T) for all sensors if input id==NULL
+   or for single sensor. then id is the rom-code
+*    @param  [in] n num bus onewire
+*    @param  [in] with_power_extern
+*    @param  [in] rom_code
+*    @return DS18X20_OK or DS18X20_START_FAIL
+*     @date 06/09/2011
+*/
+uint8_t DS18X20_start_meas(uint8_t n, uint8_t with_power_extern, uint8_t id[]) {
+    ow_reset(n); //**
+    if ( ow_test_pin(n) ) { // only send if bus is "idle" = high
+        ow_command(n, DS18X20_CONVERT_T, id );
+        if (with_power_extern != DS18X20_POWER_EXTERN)
+            ow_parasite_enable(n);
+        return DS18X20_OK;
+    }
+    return DS18X20_START_FAIL;
+
+}
+//**********************************************************************************************************
+//*                                  DS18X20_read_meas
+//**********************************************************************************************************
+
+/**
+*   @brief reads temperature (scratchpad) of sensor with rom-code id
+   output: subzero==1 if temp.<0, cel: full celsius, mcel: frac
+   in millicelsius*0.1
+   i.e.: subzero=1, cel=18, millicel=5000 = -18,5000&#65533;C
+*    @param  [in] id[] = rom_code
+*    @param  [out] subzero
+*    @param  [out] cel
+*    @param  [out] cel_frac_bits
+*    @return DS18X20_OK or DS18X20_ERROR_CRC
+*     @date 20/06/2011
+*/
+uint8_t DS18X20_read_meas(uint8_t id[], uint8_t *subzero,
+                          uint8_t *cel, uint8_t *cel_frac_bits) {
+    uint8_t i;
+    uint8_t sp[DS18X20_SP_SIZE];
+
+    ow_reset();
+    ow_command(DS18X20_READ, id);
+    for ( i=0 ; i< DS18X20_SP_SIZE; i++ )
+        sp[i]=ow_byte_rd();
+    if ( crc8( &sp[0], DS18X20_SP_SIZE ) ){
+          if ((sp[DS18X20_SP_SIZE-1]==0xFF) && (sp[DS18X20_SP_SIZE-2]==0xFF))
+            return OW_ERROR;    // bus error
+        return DS18X20_ERROR_CRC;    // data error
+    }
+        
+    DS18X20_meas_to_cel(id[0], sp, subzero, cel, cel_frac_bits);
+    return DS18X20_OK;
+}
+/**
+*   @brief reads temperature (scratchpad) of sensor with rom-code id
+   output: subzero==1 if temp.<0, cel: full celsius, mcel: frac
+   in millicelsius*0.1
+   i.e.: subzero=1, cel=18, millicel=5000 = -18,5000&#65533;C
+*    @param  [in] n num bus onewire
+*    @param  [in] id[] = rom_code
+*    @param  [out] subzero
+*    @param  [out] cel
+*    @param  [out] cel_frac_bits
+*    @return DS18X20_OK or DS18X20_ERROR_CRC
+*     @date 06/09/2011
+*/
+uint8_t DS18X20_read_meas(uint8_t n,uint8_t id[], uint8_t *subzero,
+                          uint8_t *cel, uint8_t *cel_frac_bits) {
+    uint8_t i;
+    uint8_t sp[DS18X20_SP_SIZE];
+
+    ow_reset(n);
+    ow_command(n,DS18X20_READ, id);
+    for ( i=0 ; i< DS18X20_SP_SIZE; i++ )
+        sp[i]=ow_byte_rd(n);
+    if ( crc8( &sp[0], DS18X20_SP_SIZE ) ){
+          if ((sp[DS18X20_SP_SIZE-1]==0xFF) && (sp[DS18X20_SP_SIZE-2]==0xFF))
+            return OW_ERROR;    // bus error
+        return DS18X20_ERROR_CRC;    // data error
+    }
+        
+    DS18X20_meas_to_cel(id[0], sp, subzero, cel, cel_frac_bits);
+    return DS18X20_OK;
+}
+/**
+*   @brief convert raw value from DS18x20 to Celsius
+   input is:
+   - familycode fc (0x10/0x28 see header)
+   - scratchpad-buffer
+   output is:
+   - cel full celsius
+   - fractions of celsius in millicelsius*(10^-1)/625 (the 4 LS-Bits)
+   - subzero =0 positiv / 1 negativ
+   always returns  DS18X20_OK
+   TODO invalid-values detection (but should be covered by CRC)
+*    @param  [in] fc
+*    @param  [in] sp
+*    @param  [out] subzero
+*    @param  [out] cel
+*    @param  [out] cel_frac_bits
+*    @return DS18X20_OK
+*     @date 20/06/2011
+*/
+uint8_t DS18X20_meas_to_cel( uint8_t fc, uint8_t *sp,
+                             uint8_t* subzero, uint8_t* cel, uint8_t* cel_frac_bits) {
+    uint16_t meas;
+    uint8_t  i;
+
+    meas = sp[0];  // LSB
+    meas |= ((uint16_t)sp[1])<<8; // MSB
+    //meas = 0xff5e; meas = 0xfe6f;
+
+    //  only work on 12bit-base
+    if ( fc == DS18S20_ID ) { // 9 -> 12 bit if 18S20
+        /* Extended measurements for DS18S20 contributed by Carsten Foss */
+        meas &= (uint16_t) 0xfffe;    // Discard LSB , needed for later extended precicion calc
+        meas <<= 3;                    // Convert to 12-bit , now degrees are in 1/16 degrees units
+        meas += (16 - sp[6]) - 4;    // Add the compensation , and remember to subtract 0.25 degree (4/16)
+    }
+
+    // check for negative
+    if ( meas & 0x8000 )  {
+        *subzero=1;      // mark negative
+        meas ^= 0xffff;  // convert to positive => (twos complement)++
+        meas++;
+    } else *subzero=0;
+
+    // clear undefined bits for B != 12bit
+    if ( fc == DS18B20_ID ) { // check resolution 18B20
+        i = sp[DS18B20_CONF_REG];
+        if ( (i & DS18B20_12_BIT) == DS18B20_12_BIT ) ;
+        else if ( (i & DS18B20_11_BIT) == DS18B20_11_BIT )
+            meas &= ~(DS18B20_11_BIT_UNDF);
+        else if ( (i & DS18B20_10_BIT) == DS18B20_10_BIT )
+            meas &= ~(DS18B20_10_BIT_UNDF);
+        else { // if ( (i & DS18B20_9_BIT) == DS18B20_9_BIT ) {
+            meas &= ~(DS18B20_9_BIT_UNDF);
+        }
+    }
+
+    *cel  = (uint8_t)(meas >> 4);
+    *cel_frac_bits = (uint8_t)(meas & 0x000F);
+
+    return DS18X20_OK;
+}
+
+/**
+*   @brief converts to decicelsius
+   input is ouput from meas_to_cel
+    i.e.: sz=0, c=28, frac=15 returns 289 (=28.9&#65533;C)
+0    0    0
+1    625    625    1
+2    1250    250
+3    1875    875    3
+4    2500    500    4
+5    3125    125
+6    3750    750    6
+7    4375    375
+8    5000    0
+9    5625    625    9
+10    6250    250
+11    6875    875    11
+12    7500    500    12
+13    8125    125
+14    8750    750    14
+15    9375    375
+*    @param  [in]  subzero
+*    @param  [in]  cel
+*    @param  [in]  cel_frac_bits
+*    @return absolute value of temperatur in decicelsius
+*     @date 20/06/2011
+*/
+uint16_t DS18X20_temp_to_decicel(uint8_t subzero, uint8_t cel,
+                                 uint8_t cel_frac_bits) {
+    uint16_t h;
+    uint8_t  i;
+    uint8_t need_rounding[] = { 1, 3, 4, 6, 9, 11, 12, 14 };
+
+    h = cel_frac_bits*DS18X20_FRACCONV/1000;
+    h += cel*10;
+    if (!subzero) {
+        for (i=0; i<sizeof(need_rounding); i++) {
+            if ( cel_frac_bits == need_rounding[i] ) {
+                h++;
+                break;
+            }
+        }
+    }
+    return h;
+}
+/**
+*   @brief  compare temperature values (full celsius only)
+*    @param  [in] subzero1
+*    @param  [in] cel1
+*    @param  [in] subzero2
+*    @param  [in] cel2
+*    @return -1 if param-pair1 < param-pair2
+            0 if ==
+            1 if >
+*     @date 20/06/2011
+*/
+int8_t DS18X20_temp_cmp(uint8_t subzero1, uint16_t cel1,
+                        uint8_t subzero2, uint16_t cel2) {
+    int16_t t1 = (subzero1) ? (cel1*(-1)) : (cel1);
+    int16_t t2 = (subzero2) ? (cel2*(-1)) : (cel2);
+
+    if (t1<t2) return -1;
+    if (t1>t2) return 1;
+    return 0;
+}
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 DS18X20.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DS18X20.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,66 @@
+/* DS18X20 specific values (see datasheet www.maxim-ic.com/datasheet/index.mvp/id/2812) */
+#ifndef _DS18X20_
+#define _DS18X20_
+#define DS18S20_ID 0x10
+#define DS18B20_ID 0x28
+
+#define DS18X20_POWER_PARASITE 0x00
+#define DS18X20_POWER_EXTERN   0x01
+#define DS18X20_CONVERT_T    0x44
+#define DS18X20_READ        0xBE
+#define DS18X20_WRITE        0x4E
+#define DS18X20_EE_WRITE    0x48
+#define DS18X20_EE_RECALL    0xB8
+#define DS18X20_READ_POWER_SUPPLY 0xB4
+
+#define DS18X20_OK          0x00
+#define DS18X20_ERROR       0x01
+#define DS18X20_START_FAIL  0x02
+#define DS18X20_ERROR_CRC   0x03
+
+#define DS18B20_CONF_REG    4
+#define DS18B20_9_BIT       0
+#define DS18B20_10_BIT      (1<<5)
+#define DS18B20_11_BIT      (1<<6)
+#define DS18B20_12_BIT      ((1<<6)|(1<<5))
+
+// indefined bits in LSB if 18B20 != 12bit
+#define DS18B20_9_BIT_UNDF       ((1<<0)|(1<<1)|(1<<2))
+#define DS18B20_10_BIT_UNDF      ((1<<0)|(1<<1))
+#define DS18B20_11_BIT_UNDF      ((1<<0))
+#define DS18B20_12_BIT_UNDF      0
+
+// conversion times in ms
+#define DS18B20_TCONV_12BIT      750
+#define DS18B20_TCONV_11BIT      DS18B20_TCONV_12_BIT/2
+#define DS18B20_TCONV_10BIT      DS18B20_TCONV_12_BIT/4
+#define DS18B20_TCONV_9BIT       DS18B20_TCONV_12_BIT/8
+#define DS18S20_TCONV            DS18B20_TCONV_12_BIT
+
+// constant to convert the fraction bits to cel*(10^-4)
+#define DS18X20_FRACCONV         625
+
+#define DS18X20_SP_SIZE  9
+
+// DS18X20 EEPROM-Support
+#define DS18X20_WRITE_SCRATCHPAD  0x4E
+#define DS18X20_COPY_SCRATCHPAD   0x48
+#define DS18X20_RECALL_E2         0xB8
+#define DS18X20_COPYSP_DELAY      10 /* ms */
+#define DS18X20_TH_REG      2
+#define DS18X20_TL_REG      3
+
+void DS18X20_show_temp(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits,char *text);
+float DS18X20_temp(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits);                          
+uint8_t DS18X20_get_power_status(uint8_t id[]); 
+uint8_t DS18X20_get_power_status(uint8_t n,uint8_t id[]);
+uint8_t DS18X20_start_meas( uint8_t with_external, uint8_t id[]);
+uint8_t DS18X20_start_meas(uint8_t n, uint8_t with_external, uint8_t id[]);
+uint8_t DS18X20_read_meas(uint8_t id[], uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits);
+uint8_t DS18X20_read_meas(uint8_t n, uint8_t id[], uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits);
+uint8_t DS18X20_read_meas_single(uint8_t familycode, uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits);
+uint8_t DS18X20_meas_to_cel( uint8_t fc, uint8_t *sp, uint8_t* subzero, uint8_t* cel, uint8_t* cel_frac_bits);
+uint8_t DS18X20_read_meas(uint8_t n,uint8_t id[], float* temperature);
+uint16_t DS18X20_temp_to_decicel(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits);
+int8_t DS18X20_temp_cmp(uint8_t subzero1, uint16_t cel1, uint8_t subzero2, uint16_t cel2);
+#endif
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 DS2450.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DS2450.cpp	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,464 @@
+/**
+* @file DS2450.c
+* @brief library of DS2450 1-Wire Quad A/D Converter  (http://www.maxim-ic.com/datasheet/index.mvp/id/2921)
+* @author Frederic BLANC (Published 01/03/2012 www.mbed.org)
+*/
+#include "mbed.h"
+#include "onewire.h"
+#include "DS2450.h"
+#include "crc8.h"
+#include "crc16.h"
+#include "utils.h"
+//**********************************************************************************************************
+//*                                  DS2450_read_ADC
+//**********************************************************************************************************
+
+/**
+ *     @brief lancement lecture DS2450 ADC
+ *    @param  [in] id[] tableau d'identifiant OW
+ *    @param  [out] adc[] tableau des valeurs des adc
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 20/06/2011
+ *
+ */
+uint8_t DS2450_read_ADC(uint8_t id[], uint16_t adc[]) {
+    uint8_t i,j;
+    uint8_t error;
+    uint8_t sp[DS2450_SP_SIZE];
+    //waiting for convertion time ( nbchannel x resolution x 80&#65533;s +160&#65533;s)
+
+    error=DS2450_read_page(&id[0],DS2450_PAGE0,&sp[0]); //read data
+    if (error)
+        return error;
+    j=0;
+    for (i=0;i<8;i+=2)
+        adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+    return OW_OK;
+}
+
+
+/**
+ *     @brief lancement lecture DS2450 ADC
+ *    @param  [in] n num bus onewire
+ *    @param  [in] id[] tableau d'identifiant OW
+ *    @param  [out] adc[] tableau des valeurs des adc
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 07/09/2011
+ *
+ */
+uint8_t DS2450_read_ADC(uint8_t n,uint8_t id[], uint16_t adc[]) {
+    uint8_t i,j;
+    uint8_t error;
+    uint8_t sp[DS2450_SP_SIZE];
+    //waiting for convertion time ( nbchannel x resolution x 80&#65533;s +160&#65533;s)
+
+    error=DS2450_read_page(n,&id[0],DS2450_PAGE0,&sp[0]); //read data
+    if (error)
+        return error;
+    j=0;
+    for (i=0;i<8;i+=2)
+        adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+    return OW_OK;
+}
+//**********************************************************************************************************
+//*                                  DS2450_start_and_read_ADC
+//**********************************************************************************************************
+
+/**
+ *     @brief lancement & lecture DS2450 ADC
+ *    @param  [in] id[] tableau d'identifiant OW
+ *    @param  [out] adc[] tableau des valeurs des adc
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 20/06/2011
+ *
+ */
+uint8_t DS2450_start_and_read_ADC(uint8_t id[], uint16_t adc[]) {
+    uint8_t i,j;
+    uint8_t error;
+    uint8_t sp[DS2450_SP_SIZE];
+
+    error=DS2450_convert(&id[0],0x0F,0x00); //start convert
+    if (error)
+        return error;
+
+    wait_ms(15);                           //waiting for convertion time ( nbchannel x resolution x 80&#65533;s +160&#65533;s)
+
+    error=DS2450_read_page(&id[0],DS2450_PAGE0,&sp[0]); //read data
+    if (error)
+        return error;
+
+    j=0;
+    for (i=0;i<8;i+=2)
+        adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+    return OW_OK;
+}
+
+/**
+ *     @brief lancement & lecture DS2450 ADC
+ *    @param  [in] n num bus onewire
+ *    @param  [in] id[] tableau d'identifiant OW
+ *    @param  [out] adc[] tableau des valeurs des adc
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 07/09/2011
+ *
+ */
+uint8_t DS2450_start_and_read_ADC(uint8_t n,uint8_t id[], uint16_t adc[]) {
+    uint8_t i,j;
+    uint8_t error;
+    uint8_t sp[DS2450_SP_SIZE];
+
+    error=DS2450_convert(n,&id[0],0x0F,0x00); //start convert
+    if (error)
+        return error;
+
+    wait_ms(15);                           //waiting for convertion time ( nbchannel x resolution x 80&#65533;s +160&#65533;s)
+
+    error=DS2450_read_page(n,&id[0],DS2450_PAGE0,&sp[0]); //read data
+    if (error)
+        return error;
+
+    j=0;
+    for (i=0;i<8;i+=2)
+        adc[j++]=uint8_to_uint16(sp[i+3],sp[i+4]); //sp[i+3] LSB ,sp[i+4] MSB
+    return OW_OK;
+}
+
+//**********************************************************************************************************
+//*                                  DS2450_read_page
+//**********************************************************************************************************
+
+/**
+ *     @brief lancement lecture page DS2450 ADC
+ *    @param  [in]  id[] tableau d'identifiant OW
+ *    @param  [in]  adresse de la page a lire
+ *    @param  [out]  uint16_t sp tableau des valeurs de la page
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 20/06/2011
+ *
+ */
+uint8_t DS2450_read_page(uint8_t id[], uint8_t adresse,
+                         uint8_t *sp) {
+    uint8_t i;
+    if (id[0] == DS2450_ID) {
+        if (ow_reset())                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_READ_MEMORY;   // command
+        sp[1]=adresse;              //adress page LSB
+        sp[2]=0;                    //adress page MSB
+        ow_command(sp[0], &id[0]);
+        ow_byte_wr(sp[1]);
+        ow_byte_wr(sp[2]);
+
+        for ( i=3 ; i< DS2450_SP_SIZE; i++ ) { //read 8xdata + CRC16
+            sp[i]=ow_byte_rd();
+        }
+
+        if (ctrl_crc16( &sp[0], DS2450_SP_SIZE ) ) { //CRC16 (command+adress page LSB+adress page MSB+8xdata)
+            wait_ms(100);                   //wait 100ms if error
+            if ((sp[DS2450_SP_SIZE-1]==0xFF) && (sp[DS2450_SP_SIZE-2]==0xFF))
+                return OW_ERROR;    // bus error
+            if ((sp[DS2450_SP_SIZE-1]==0x00) && (sp[DS2450_SP_SIZE-2]==0x00))
+                return OW_BUSY;
+    
+            return OW_ERROR_CRC;    // data error
+        }
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+/**
+ *     @brief lancement lecture page DS2450 ADC
+  *    @param  [in] n num bus onewire
+ *    @param  [in]  id[] tableau d'identifiant OW
+ *    @param  [in]  adresse de la page a lire
+ *    @param  [out]   sp tableau des valeurs de la page
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 07/09/2011
+ *
+ */
+uint8_t DS2450_read_page(uint8_t n,uint8_t id[], uint8_t adresse,
+                         uint8_t *sp) {
+    uint8_t i;
+    if (id[0] == DS2450_ID) {
+        if (ow_reset(n))                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_READ_MEMORY;   // command
+        sp[1]=adresse;              //adress page LSB
+        sp[2]=0;                    //adress page MSB
+        ow_command(n,sp[0], &id[0]);
+        ow_byte_wr(n,sp[1]);
+        ow_byte_wr(n,sp[2]);
+
+        for ( i=3 ; i< DS2450_SP_SIZE; i++ ) { //read 8xdata + CRC16
+            sp[i]=ow_byte_rd(n);
+        }
+
+        if (ctrl_crc16( &sp[0], DS2450_SP_SIZE ) ) { //CRC16 (command+adress page LSB+adress page MSB+8xdata)
+            wait_ms(100);                   //wait 100ms if error
+            if ((sp[DS2450_SP_SIZE-1]==0xFF) && (sp[DS2450_SP_SIZE-2]==0xFF))
+                return OW_ERROR;    // bus error
+            if ((sp[DS2450_SP_SIZE-1]==0x00) && (sp[DS2450_SP_SIZE-2]==0x00))
+                return OW_BUSY;
+    
+            return OW_ERROR_CRC;    // data error
+        }
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+//**********************************************************************************************************
+//*                                  DS2450_convert
+//**********************************************************************************************************
+
+/**
+ *     @brief lancement convertion DS2450 ADC
+ *    @param  [in] uint8_t id[] tableau d'identifiant OW
+ *    @param  [in] uint8_t input_select_mask
+ *    @param  [in] uint8_t read_out_control
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 20/06/2011
+ *
+ */
+uint8_t DS2450_convert(uint8_t id[], uint8_t input_select_mask,uint8_t read_out_control) {
+    uint8_t i;
+    uint8_t sp[5];
+    if (id[0] == DS2450_ID) {
+        if (ow_reset())                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_CONVERT;       // command
+        sp[1]=input_select_mask;    //mask
+        sp[2]=read_out_control;     //control
+        ow_command(sp[0], &id[0]);
+        ow_byte_wr(sp[1]);
+        ow_byte_wr(sp[2]);
+        for ( i=3 ; i< 5; i++ ) {   // read CRC16
+            sp[i]=ow_byte_rd();
+        }
+
+        if (ctrl_crc16( &sp[0], 5 ) ) { //CRC16 (command+mask LSB+control)
+            if ((sp[3]==0xFF) && (sp[3]==0xFF))
+                return OW_ERROR;
+            return OW_ERROR_CRC;
+        }
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+/**
+ *     @brief lancement convertion DS2450 ADC
+ *    @param  [in] n num bus onewire
+ *    @param  [in] uint8_t id[] tableau d'identifiant OW
+ *    @param  [in] uint8_t input_select_mask
+ *    @param  [in] uint8_t read_out_control
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 07/09/2011
+ *
+ */
+uint8_t DS2450_convert(uint8_t n,uint8_t id[], uint8_t input_select_mask,uint8_t read_out_control) {
+    uint8_t i;
+    uint8_t sp[5];
+    if (id[0] == DS2450_ID) {
+        if (ow_reset(n))                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_CONVERT;       // command
+        sp[1]=input_select_mask;    //mask
+        sp[2]=read_out_control;     //control
+        ow_command(n,sp[0], &id[0]);
+        ow_byte_wr(n,sp[1]);
+        ow_byte_wr(n,sp[2]);
+        for ( i=3 ; i< 5; i++ ) {   // read CRC16
+            sp[i]=ow_byte_rd(n);
+        }
+
+        if (ctrl_crc16( &sp[0], 5 ) ) { //CRC16 (command+mask LSB+control)
+            if ((sp[3]==0xFF) && (sp[3]==0xFF))
+                return OW_ERROR;
+            return OW_ERROR_CRC;
+        }
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+
+//**********************************************************************************************************
+//*                                  DS2450_configure_channel_ADC
+//**********************************************************************************************************
+
+/**
+ *     @brief configure canal ADC  DS2450
+ *    @param  [in] id[] tableau d'identifiant OW
+ *    @param  [in] channel
+ *  @param  [in] conflsb configuration OE-A OC-A 0 0 RC3-A RC2-A RC1-A RC0-A
+ *  @param  [in] confmsb configuration POR 0 AFH-A AFL-A AEH-A AEL-A 0 IR-A
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 20/06/2011
+ *
+ */
+uint8_t DS2450_configure_channel_ADC(uint8_t id[],uint8_t channel,uint8_t conflsb,uint8_t confmsb) {
+    uint8_t i;
+    uint8_t sp[7];
+    if (id[0] == DS2450_ID) {
+        if (ow_reset())                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_WRITE_MEMORY;  // command
+        sp[1]=DS2450_PAGE1+channel; //adress page LSB
+        sp[2]=0x00;                 //adress page MSB
+        sp[3]=conflsb;              //databyte
+        ow_command(sp[0], &id[0]);
+        ow_byte_wr(sp[1]);
+        ow_byte_wr(sp[2]);
+        ow_byte_wr(sp[3]);
+        for ( i=4 ; i< 7; i++ ) {   //read CRC16+databyte
+            sp[i]=ow_byte_rd();
+        }
+
+        if (ctrl_crc16( &sp[0], 6 ) ) //CRC16 (command+adress page LSB+adress page MSB+databyte)
+            return OW_ERROR_CRC;
+        sp[3]=confmsb;                //databyte
+        ow_byte_wr(sp[3]);
+        for ( i=4 ; i< 7; i++ ) {   //read CRC16+databyte
+            sp[i]=ow_byte_rd();
+        }
+
+        if (sp[3]!=sp[6] ) //control data
+            return OW_ERROR_CRC;
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+/**
+ *     @brief configure canal ADC  DS2450
+ *    @param  [in] n num bus onewire
+ *    @param  [in] id[] tableau d'identifiant OW
+ *    @param  [in] channel
+ *  @param  [in] conflsb configuration OE-A OC-A 0 0 RC3-A RC2-A RC1-A RC0-A
+ *  @param  [in] confmsb configuration POR 0 AFH-A AFL-A AEH-A AEL-A 0 IR-A
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 20/06/2011
+ *
+ */
+uint8_t DS2450_configure_channel_ADC(uint8_t n,uint8_t id[],uint8_t channel,uint8_t conflsb,uint8_t confmsb) {
+    uint8_t i;
+    uint8_t sp[7];
+    if (id[0] == DS2450_ID) {
+        if (ow_reset(n))                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_WRITE_MEMORY;  // command
+        sp[1]=DS2450_PAGE1+channel; //adress page LSB
+        sp[2]=0x00;                 //adress page MSB
+        sp[3]=conflsb;              //databyte
+        ow_command(n,sp[0], &id[0]);
+        ow_byte_wr(n,sp[1]);
+        ow_byte_wr(n,sp[2]);
+        ow_byte_wr(n,sp[3]);
+        for ( i=4 ; i< 7; i++ ) {   //read CRC16+databyte
+            sp[i]=ow_byte_rd(n);
+        }
+
+        if (ctrl_crc16( &sp[0], 6 ) ) //CRC16 (command+adress page LSB+adress page MSB+databyte)
+            return OW_ERROR_CRC;
+        sp[3]=confmsb;                //databyte
+        ow_byte_wr(n,sp[3]);
+        for ( i=4 ; i< 7; i++ ) {   //read CRC16+databyte
+            sp[i]=ow_byte_rd(n);
+        }
+
+        if (sp[3]!=sp[6] ) //control data
+            return OW_ERROR_CRC;
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+//**********************************************************************************************************
+//*                                  DS2450_configure_channel_ADC
+//**********************************************************************************************************
+
+/**
+ *     @brief configure PAGE
+ *    @param  [in] id[] tableau d'identifiant OW
+  *    @param  [in] uint8_t adresse de la page a ecrire
+ *  @param  [in] config_page tableau de 8 byte
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 20/06/2011
+ *
+ */
+uint8_t DS2450_configure_page(uint8_t id[], uint8_t adresse,uint8_t configpage[]) {
+    uint8_t i,j;
+    uint8_t sp[7];
+    if (id[0] == DS2450_ID) {
+        if (ow_reset())                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_WRITE_MEMORY;      // command
+        sp[1]=adresse;                  //adress page LSB
+        sp[2]=0x00;                     //adress page MSB
+        sp[3]=configpage[0];            //databyte
+        ow_command(sp[0], &id[0]);
+        ow_byte_wr(sp[1]);
+        ow_byte_wr(sp[2]);
+        ow_byte_wr(sp[3]);
+        for ( i=4 ; i< 7; i++ ) {       //read CRC16+databyte
+            sp[i]=ow_byte_rd();
+        }
+
+        if (sp[3]!=sp[6] ) //control data
+            return OW_ERROR_CRC;
+
+        for ( j=1 ; j< 7; j++ ) {
+            sp[3]=configpage[j];        //databyte
+            ow_byte_wr(sp[3]);
+            for ( i=4 ; i< 7; i++ ) {   //read CRC16+databyte
+                sp[i]=ow_byte_rd();
+            }
+            if (sp[3]!=sp[6] ) //control data
+                return OW_ERROR_CRC;
+
+        }
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+/**
+ *     @brief configure PAGE
+  *    @param  [in] n num bus onewire
+ *    @param  [in] id[] tableau d'identifiant OW
+  *    @param  [in] uint8_t adresse de la page a ecrire
+ *  @param  [in] config_page tableau de 8 byte
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *     @date 07/09/2011
+ *
+ */
+uint8_t DS2450_configure_page(uint8_t n,uint8_t id[], uint8_t adresse,uint8_t configpage[]) {
+    uint8_t i,j;
+    uint8_t sp[7];
+    if (id[0] == DS2450_ID) {
+        if (ow_reset(n))                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=DS2450_WRITE_MEMORY;      // command
+        sp[1]=adresse;                  //adress page LSB
+        sp[2]=0x00;                     //adress page MSB
+        sp[3]=configpage[0];            //databyte
+        ow_command(n,sp[0], &id[0]);
+        ow_byte_wr(n,sp[1]);
+        ow_byte_wr(n,sp[2]);
+        ow_byte_wr(n,sp[3]);
+        for ( i=4 ; i< 7; i++ ) {       //read CRC16+databyte
+            sp[i]=ow_byte_rd(n);
+        }
+
+        if (sp[3]!=sp[6] ) //control data
+            return OW_ERROR_CRC;
+
+        for ( j=1 ; j< 7; j++ ) {
+            sp[3]=configpage[j];        //databyte
+            ow_byte_wr(n,sp[3]);
+            for ( i=4 ; i< 7; i++ ) {   //read CRC16+databyte
+                sp[i]=ow_byte_rd(n);
+            }
+            if (sp[3]!=sp[6] ) //control data
+                return OW_ERROR_CRC;
+
+        }
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 DS2450.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DS2450.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,47 @@
+/* DS2450 specific values (see datasheet www.maxim-ic.com/datasheet/index.mvp/id/2921) */
+#ifndef _DS2450_
+#define _DS2450_
+#define DS2450_ID           0x20
+#define DS2450_READ_MEMORY  0xAA
+#define DS2450_WRITE_MEMORY 0x55
+#define DS2450_CONVERT      0x3C
+
+#define DS2450_SP_SIZE 13
+#define DS2450_PAGE0 0x00
+#define DS2450_PAGE1 0x08
+#define DS2450_PAGE2 0x10
+#define DS2450_PAGE3 0x18
+
+#define DS2450_ADCA 0x00 //channel A
+#define DS2450_ADCB 0x02 //channel B
+#define DS2450_ADCC 0x04 //channel C
+#define DS2450_ADCD 0x06 //channel D
+
+#define DS2450_IR_2V5          0x00 //input voltage range 2.55V
+#define DS2450_IR_5V1          0x01 //input voltage range 5.1V
+#define DS2450_AFH              0x20 //flag alarm value higher
+#define DS2450_AFL              0x10 //flag alarm value lower
+#define DS2450_AEH_ENABLE       0x08 //alarm value higher enable  
+#define DS2450_AEL_ENABLE       0x04 //alarm value lower enable
+
+#define DS2450_DISABLE_OUT  0x00 //disable ouput
+#define DS2450_ENABLE_OUT   0x80//enable ouput
+
+#define DS2450_16_BIT       0x00 //ADC 16bits enable ouput
+#define DS2450_15_BIT       0x0F //ADC 15bits enable ouput
+#define DS2450_12_BIT       0x0C //ADC 12bits enable ouput
+#define DS2450_8_BIT        0x08   //ADC 8bits enable ouput
+#define DS2450_1_BIT        0x01   //ADC 1bits enable ouput
+uint8_t DS2450_read_page(uint8_t id[], uint8_t adresse, uint8_t *val);
+uint8_t DS2450_read_page(uint8_t n,uint8_t id[], uint8_t adresse, uint8_t *val);
+uint8_t DS2450_convert(uint8_t id[], uint8_t input_select_mask,uint8_t read_out_control);
+uint8_t DS2450_convert(uint8_t n,uint8_t id[], uint8_t input_select_mask,uint8_t read_out_control);
+uint8_t DS2450_read_ADC(uint8_t id[], uint16_t adc[]);
+uint8_t DS2450_read_ADC(uint8_t n,uint8_t id[], uint16_t adc[]);
+uint8_t DS2450_start_and_read_ADC(uint8_t id[], uint16_t adc[]);
+uint8_t DS2450_start_and_read_ADC(uint8_t n,uint8_t id[], uint16_t adc[]);
+uint8_t DS2450_configure_channel_ADC(uint8_t id[],uint8_t channel,uint8_t conflsb,uint8_t confmsb);
+uint8_t DS2450_configure_channel_ADC(uint8_t n,uint8_t id[],uint8_t channel,uint8_t conflsb,uint8_t confmsb);
+uint8_t DS2450_configure_page(uint8_t id[], uint8_t adresse,uint8_t configpage[]);
+uint8_t DS2450_configure_page(uint8_t n,uint8_t id[], uint8_t adresse,uint8_t configpage[]);
+#endif
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 Horner_ITS90.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Horner_ITS90.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,49 @@
+#ifndef __Horner_ITS90_H__
+#define __Horner_ITS90_H__
+
+const double ITS90_TCK_subzero[] =
+{
+  
+
+0.0,
+2.5173462E-2,
+-1.1662878E-6,
+-1.0833638E-9,
+-8.9773540E-13,
+-3.7342377E-16,
+-8.6632643E-20,
+-1.0450598E-23,
+-5.1920577E-28,
+0.0
+
+};
+const double ITS90_TCK_sub500[] =
+{
+0.0,
+2.508355E-02,
+7.860106E-08,
+-2.503131E-10,
+8.315270E-14,
+-1.228034E-17,
+9.804036E-22,
+-4.413030E-26,
+1.057734E-30,
+-1.052755E-35
+};
+
+const double ITS90_TCK_sub1372[] =
+{
+-1.318058E+02,
+4.830222E-02,
+-1.646031E-06,
+5.464731E-11,
+-9.650715E-16,
+8.802193E-21,
+-3.110810E-26,
+0.0,
+0.0,
+0.0
+
+};
+
+#endif
diff -r 000000000000 -r 9acbbb021a43 MAX31850.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX31850.cpp	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,125 @@
+/**
+* @file MAX31850.cpp
+* @brief library of MAX31850  1-Wire Thermocouple-to-Digital Converters,Cold-Junction Compensated  (http://www.maximintegrated.com/datasheet/index.mvp/id/7953)
+* @author Frederic BLANC
+* @date 2014_01_15
+*/
+#include "mbed.h"
+#include "onewire.h"
+#include "MAX31850.h"
+#include "crc8.h"
+#include "Horner_ITS90.h"
+int MAX31850_Read_Scratch(uint8_t id[],uint8_t sp[],uint8_t n)
+{
+    if (id[0] == MAX31850_ID) {
+        if (ow_reset(n))                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        sp[0]=MAX31850_READ;   // command
+        ow_command(n,sp[0], &id[0]);
+        for ( int i=0 ; i< MAX31850_SP_SIZE; i++ ) { //read 8xdata + CRC16
+            sp[i]=ow_byte_rd(n);
+        }
+        if(sp[8]!=crc8(sp,8))
+            return OW_ERROR_CRC;
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
+
+int MAX31850_Temp_TRUE(uint8_t *sp,double *temp)
+{
+
+
+    float temp_cj,temp_tc;
+    double vtc;
+    int err; 
+    
+    err = MAX31850_Temp_TC(sp,&temp_tc);
+    if(err) {
+        return err;
+    }
+    MAX31850_Temp_CJ(sp,&temp_cj);
+
+    vtc = MAX31850_K * temp_tc ;
+    *temp=0;
+    if(temp_tc < 0.0) {
+        for(int i=0;i<10;++i)
+        {
+        
+        *temp+=ITS90_TCK_subzero[i]*pow(vtc,i);
+        }
+    } else if(temp_tc < 500.0) {
+        for(int i=0;i<10;++i)
+        {
+        
+        *temp+=ITS90_TCK_sub500[i]*pow(vtc,i);
+        }
+    } else {
+        for(int i=0;i<10;++i)
+        {
+        
+        *temp+=ITS90_TCK_sub1372[i]*pow(vtc,i);
+        }
+    }
+    return OW_OK;
+}
+
+
+int MAX31850_Temp_TC(uint8_t *sp,float *temp)
+{
+
+    uint8_t *ptr_meas;
+    uint16_t meas;
+
+    if(sp[0]& 1)
+        return MAX31850_ERR_FAULT;
+    if(sp[2]& (1<<1))
+        return MAX31850_ERR_OPEN_CIRCUIT;
+    if(sp[2]& (1<<2))
+        return MAX31850_ERR_SHORT2GND;
+    if(sp[2]& (1<<3))
+        return MAX31850_ERR_SHORT2VDD;
+    ptr_meas=(uint8_t*) &meas;
+    *ptr_meas = sp[0]  ;  // LSB
+    *++ptr_meas = sp[1]; // MSB
+    if ( meas & 0x8000 )  {
+
+        meas ^= 0xffff;  // convert to positive => (twos complement)++
+        meas++;
+        *temp= -1.0 * MAX31850_ADC_TEMP_TC_UNIT * (float)(meas>>2);
+    } else {
+        *temp=  MAX31850_ADC_TEMP_TC_UNIT * (float)(meas>>2);
+    }
+
+    return OW_OK;
+}
+
+int MAX31850_Temp_CJ(uint8_t *sp,float *temp)
+{
+    uint8_t *ptr_meas;
+    uint16_t meas;
+
+    ptr_meas=(uint8_t*) &meas;
+    *ptr_meas = sp[2]  ;  // LSB
+    *++ptr_meas = sp[3]; // MSB
+    if ( meas & 0x8000 )  {
+
+        meas ^= 0xffff;  // convert to positive => (twos complement)++
+        meas++;
+        *temp= -1.0 * MAX31850_ADC_TEMP_CJ_UNIT * (float)(meas>>4);
+    } else {
+        *temp=  MAX31850_ADC_TEMP_CJ_UNIT * (float)(meas>>4);
+    }
+    return OW_OK;
+}
+
+int MAX31850_Start_meas(uint8_t id[],uint8_t n=0)
+{
+    if (id[0] == MAX31850_ID) {
+        if (ow_reset(n))                 //reset OW
+            return OW_SHORT_CIRCUIT;
+        ow_command(n,MAX31850_CONVERT_T, &id[0]);
+        return OW_OK;
+    }
+    return OW_ERROR_BAD_ID;
+}
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 MAX31850.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX31850.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,69 @@
+/* DS2450 specific values (see datasheet http://www.maximintegrated.com/datasheet/index.mvp/id/7953) */
+#ifndef __MAX31850_H__
+#define __MAX31850_H__
+#define MAX31850_ID 0x3B
+#define MAX31850_SP_SIZE 9
+
+#define MAX31850_CONVERT_T    0x44   //  0x44
+#define MAX31850_READ_POWER_SUPPLY    0xB4
+#define MAX31850_READ           0xBE
+
+#define MAX31850_ADC_TEMP_TC_UNIT   0.25
+#define MAX31850_ADC_TEMP_CJ_UNIT   0.0625
+#define MAX31850_K               41.276//41.276µV/C
+
+#define MAX31850_ERR_FAULT -10;
+#define MAX31850_ERR_SHORT2VDD -12;
+#define MAX31850_ERR_SHORT2GND -13;
+#define MAX31850_ERR_OPEN_CIRCUIT -14;
+/**
+ *    @brief  lecture  registre MAX31850
+ *    @param  [in] uint8_t id[] tableau d'identifiant OW
+ *    @param  [out] uint8_t  sp[] tableau de registre
+ *    @param  [in] uint8_t n bus ow
+ *    @return OW_OK si erreur retourne OW_ERROR_CRC
+ *    @date 02/12/2013
+ *
+ */
+int MAX31850_Read_Scratch(uint8_t id[],uint8_t sp[],uint8_t n) ;
+
+/**
+ *    @brief  lecture  temperature thermocouple Linearized MAX31850
+ *    @param  [in] uint8_t sp[] tableau registre MAX31850
+ *    @param  [out] float temperature thermocouple Linearized degre Celsuis
+ *    @return OW_OK si erreur retourne ERROR
+ *    @date 04/12/2013
+ *
+ */
+ int MAX31850_Temp_TRUE(uint8_t *sp,double *temp);
+ 
+/**
+ *    @brief  lecture  temperature thermocouple MAX31850
+ *    @param  [in] uint8_t sp[] tableau registre MAX31850
+ *    @param  [out] float temperature thermocouple degre Celsuis
+ *    @return OW_OK si erreur retourne ERROR
+ *    @date 04/12/2013
+ *
+ */
+ int MAX31850_Temp_TC(uint8_t *sp,float *temp) ;
+ 
+/**
+ *    @brief  lecture  temperature cold junction MAX31850
+ *    @param  [in] uint8_t sp[] tableau registre MAX31850
+ *    @param  [out] float temperature cold junction degre Celsuis
+ *    @return OW_OK si erreur retourne ERROR
+ *    @date 04/12/2013
+ *
+ */
+int MAX31850_Temp_CJ(uint8_t *sp,float *temp) ;
+
+/**
+ *    @brief  start convertion MAX31850
+ *    @param  [in] uint8_t id[] tableau d'identifiant OW
+ *    @param  [in] uint8_t n bus ow
+ *    @return OW_OK 
+ *    @date 02/12/2013
+ *
+ */
+int MAX31850_Start_meas(uint8_t id[],uint8_t n);
+#endif 
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 crc16.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crc16.cpp	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,56 @@
+#include <inttypes.h>
+#include "mbed.h"
+#include "onewire.h"
+
+#define CRC16INIT    0x0000
+//#define CRC16POLY    0x8005; // Polynome =x^16 + x^15 + x^2 + x^0 = 0x18005
+#define CRC16POLY    0xA001;
+
+uint16_t crc16(uint8_t* octets, uint16_t nboctets)
+{
+uint16_t crc = CRC16INIT;
+int i, done = 0;
+uint8_t todo;
+    if (nboctets != 0) {
+        do {
+            todo = octets[done];
+            crc ^= todo;
+            for (i = 0; i < 8; i++) {
+                if (crc % 2 != 0) {
+                    crc = (crc >> 1) ^ CRC16POLY;
+                } else {
+                    crc = crc >> 1;
+                }
+            }
+            done++;
+        } while (done < nboctets);
+        
+        
+    }
+
+return crc;
+}
+//CRC16 byte, always two bytes, bit inverted, LSByte first 
+uint8_t ctrl_crc16(uint8_t* octets, uint16_t nboctets)
+{
+    uint16_t crc;
+    uint8_t *ptr;
+#ifdef DEBUG
+    printf( "\nCRC16 : " );
+    for ( uint8_t i=0 ; i< nboctets; i++ )
+        printf(":%2.2X",octets[i]);
+    printf( "\n" );
+#endif
+    crc =~crc16(octets, nboctets-2);
+    ptr=(uint8_t*)&crc;
+#ifdef DEBUG
+    printf( "\n" );
+    printf("CRC16:%X",crc);
+    printf( "\n" );
+#endif
+    if(*ptr==octets[nboctets-2])
+        if(*++ptr==octets[nboctets-1])
+            return 0;
+
+    return 1;
+ } 
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 crc16.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crc16.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,5 @@
+#ifndef _CRC16_
+#define _CRC16_
+uint16_t crc16(uint8_t* octets, uint16_t nboctets);
+uint8_t ctrl_crc16(uint8_t* octets, uint16_t nboctets);
+#endif
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 crc8.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crc8.cpp	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,39 @@
+#include <inttypes.h>
+
+#define CRC8INIT    0x00
+#define CRC8POLY    0x18              //0X18 = X^8+X^5+X^4+X^0
+
+uint8_t    crc8 ( uint8_t *data_in, uint16_t number_of_bytes_to_read )
+{
+    uint8_t     crc;
+    uint16_t loop_count;
+    uint8_t  bit_counter;
+    uint8_t  data;
+    uint8_t  feedback_bit;
+    
+    crc = CRC8INIT;
+
+    for (loop_count = 0; loop_count != number_of_bytes_to_read; loop_count++)
+    {
+        data = data_in[loop_count];
+        
+        bit_counter = 8;
+        do {
+            feedback_bit = (crc ^ data) & 0x01;
+    
+            if ( feedback_bit == 0x01 ) {
+                crc = crc ^ CRC8POLY;
+            }
+            crc = (crc >> 1) & 0x7F;
+            if ( feedback_bit == 0x01 ) {
+                crc = crc | 0x80;
+            }
+        
+            data = data >> 1;
+            bit_counter--;
+        
+        } while (bit_counter > 0);
+    }
+    
+    return crc;
+}
diff -r 000000000000 -r 9acbbb021a43 crc8.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crc8.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,4 @@
+#ifndef _CRC8_
+#define _CRC8_
+uint8_t    crc8 (uint8_t* data_in, uint16_t number_of_bytes_to_read);
+#endif
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 onewire.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/onewire.cpp	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,575 @@
+/**
+* @file onewire.c
+* @brief library 1-Wire(www.maxim-ic.com)
+* @author Maciej Rajtar (Published 10 May 2010 www.mbed.org)
+* @author Frederic BLANC (Published 01/03/2012 www.mbed.org)
+*/
+
+#include "mbed.h"
+#include "onewire.h"
+
+DigitalInOut ow_pin(p21);
+DigitalInOut ow_0(p21);
+DigitalInOut ow_1(p22);
+DigitalInOut ow_2(p23);
+DigitalInOut ow_3(p24);
+DigitalInOut* t_ow[4]={&ow_0,&ow_1,&ow_2,&ow_3}; 
+
+//**********************************************************************************************************
+//*                                  show_id
+//**********************************************************************************************************
+  
+
+/**
+*     @brief show_id
+*    @param  [in] id[] = rom_code
+*    @param  [out] text id
+*     @date 02/12/2013
+*/
+char* ow_show_id( uint8_t id[],char *text) {
+
+    char hex[4];
+    sprintf(text,"");
+    sprintf(hex,"%2.2X",id[0]);
+        strcat(text,hex);   
+    for (int i = OW_ROMCODE_SIZE-2; i >=1 ; --i ) {
+        sprintf(hex,"%2.2X",id[i]);
+        strcat(text,hex);       
+    }
+    sprintf(hex,"%2.2X",id[OW_ROMCODE_SIZE-1]);
+        strcat(text,hex); 
+        return text; 
+    
+}
+//**********************************************************************************************************
+//*                                  show_id
+//**********************************************************************************************************
+  
+
+/**
+*     @brief uint64_id
+*    @param  [in] id[] = rom_code
+*    @return  [out] uint64_t id
+*     @date 28/03/2011
+*/
+uint64_t uint64_id( uint8_t id[]) {
+
+    uint64_t *ptr;
+    
+    ptr=(uint64_t *) &id[0];
+    
+    return *ptr;
+}
+//**********************************************************************************************************
+//*                                  search_sensors
+//**********************************************************************************************************
+
+/**
+*     @brief search_sensors
+*    @param  [out] nSensors number of device onewire
+*    @param  [out] gSensorIDs[][] array of id romcode
+*    @return OW_OK or OW_PRESENCE_ERR or OW_DATA_ERR
+*     @date 20/06/2011
+*/
+uint8_t search_sensors(uint8_t *nSensors,uint8_t gSensorIDs[][OW_ROMCODE_SIZE] ) {
+    
+
+    uint8_t i;
+    uint8_t id[OW_ROMCODE_SIZE];
+    uint8_t diff;
+    //printf( "Scanning Bus\r\n" );
+    diff = OW_SEARCH_FIRST;
+    for (*nSensors = 0 ; (diff != OW_LAST_DEVICE) && (*nSensors < MAXSENSORS) ;++(*nSensors) ) {
+        ow_find_sensor( &diff, &id[0] );
+        if ( diff == OW_PRESENCE_ERR ) {
+            //printf( "No Sensor found\r\n" );
+            return diff;
+        }
+        if ( diff == OW_DATA_ERR ) {
+            //printf( "Bus Error\r\n" );
+            return diff;
+        }
+        for (i=0;i<OW_ROMCODE_SIZE;i++)
+            gSensorIDs[*nSensors][i]=id[i];
+
+    }
+    return OW_OK;
+}
+/**
+*     @brief search_sensors
+*   @param [in] n num bus onewire
+*    @param  [out] nSensors number of device onewire
+*    @param  [out] gSensorIDs[][][] array of id romcode
+*    @return OW_OK or OW_PRESENCE_ERR or OW_DATA_ERR
+*     @date 02/09/2011
+*/
+uint8_t search_sensors(uint8_t n,uint8_t *nSensors,uint8_t gSensorIDs[][MAXSENSORS][OW_ROMCODE_SIZE] ) {
+    
+
+    uint8_t i;
+    uint8_t id[OW_ROMCODE_SIZE];
+    uint8_t diff;
+    //printf( "Scanning Bus %d\r\n",n );
+    diff = OW_SEARCH_FIRST;
+    for (*nSensors = 0 ; (diff != OW_LAST_DEVICE) && (*nSensors < MAXSENSORS) ;++(*nSensors) ) {
+        ow_find_sensor(n, &diff, &id[0] );
+        if ( diff == OW_PRESENCE_ERR ) {
+            //printf( "No Sensor found\r\n" );
+            return diff;
+        }
+        if ( diff == OW_DATA_ERR ) {
+            //printf( "Bus Error\r\n" );
+            return diff;
+        }
+        for (i=0;i<OW_ROMCODE_SIZE;i++){
+            gSensorIDs[n][*nSensors][i]=id[i];
+            //printf( "id[%d]=%d\r\n" ,i,id[i]);
+        }
+
+    }
+    return OW_OK;
+}
+//**********************************************************************************************************
+//*                                  find Sensors on 1-Wire-Bus
+//**********************************************************************************************************
+
+/**
+*     @brief find Sensors on 1-Wire-Bus
+*    @param  [in/out] diff is the result of the last rom-search
+*    @param  [out] is the rom-code of the sensor found
+*    @return  OW_OK or OW_ERROR 
+*     @date 20/06/2011
+*/
+uint8_t ow_find_sensor(uint8_t *diff, uint8_t id[]) {
+    for (;;) 
+    {
+        *diff = ow_rom_search( *diff, &id[0] );
+        if ( *diff==OW_PRESENCE_ERR)
+            return OW_ERROR;
+        if ( *diff==OW_DATA_ERR )
+            return OW_ERROR;
+        if ( *diff == OW_LAST_DEVICE )
+            return OW_OK ;
+        if ( id[0] == DS18B20_ID || id[0] == DS18S20_ID ) 
+            return OW_OK ;
+        if ( id[0] == DS2450_ID ) 
+            return OW_OK ;
+        if ( id[0] == MAX31850_ID ) 
+            return OW_OK ;
+    }
+}
+
+/**
+*     @brief find Sensors on 1-Wire-Bus
+*    @param  [in] num bus onewire
+*    @param  [in/out] diff is the result of the last rom-search
+*    @param  [out] is the rom-code of the sensor found
+*    @return  OW_OK or OW_ERROR
+*     @date 30/08/2011 
+*/
+uint8_t ow_find_sensor(uint8_t n,uint8_t *diff, uint8_t id[]) {
+    for (;;) 
+    {
+        *diff = ow_rom_search(n, *diff, &id[0] );
+        if ( *diff==OW_PRESENCE_ERR)
+            return OW_ERROR;
+        if ( *diff==OW_DATA_ERR )
+            return OW_ERROR;
+        if ( *diff == OW_LAST_DEVICE )
+            return OW_OK ;
+        if ( id[0] == DS18B20_ID || id[0] == DS18S20_ID ) 
+            return OW_OK ;
+        if ( id[0] == DS2450_ID ) 
+            return OW_OK ;
+        if ( id[0] == MAX31850_ID ) 
+            return OW_OK ;
+    }
+}
+//**********************************************************************************************************
+//*                                  search romcode
+//**********************************************************************************************************
+
+/**
+*     @brief search romcode
+*    @param  [in] uint8_t diff
+*    @param  [out] id romcode
+*    @return next_diff or OW_LAST_DEVICE or OW_DATA_ERR or OW_PRESENCE_ERR
+*     @date 20/06/2011
+*/
+uint8_t ow_rom_search( uint8_t diff, uint8_t id[] ) {
+    uint8_t i, j, next_diff;
+    uint8_t b;
+
+    if ( ow_reset() )
+        return OW_PRESENCE_ERR;    // error, no device found
+    ow_byte_wr( OW_SEARCH_ROM );            // ROM search command
+    next_diff = OW_LAST_DEVICE;            // unchanged on last device
+    i = OW_ROMCODE_SIZE * 8;                    // 8 bytes
+    do {
+        j = 8;                                // 8 bits
+        do {
+            b = ow_bit_io( 1 );                // read bit
+            if ( ow_bit_io( 1 ) ) {            // read complement bit
+                if ( b )                    // 11
+                    return OW_DATA_ERR;        // data error
+            } else {
+                if ( !b ) {                    // 00 = 2 devices
+                    if ( diff > i || ((*id & 1) && diff != i) ) {
+                        b = 1;                // now 1
+                        next_diff = i;        // next pass 0
+                    }
+                }
+            }
+            ow_bit_io( b );                 // write bit
+            *id >>= 1;
+            if ( b ) 
+                *id |= 0x80;            // store bit
+            --i;
+        } while ( --j );
+        id++;                                // next byte
+    } while ( i );
+    return next_diff;                // to continue search
+}
+/**
+*     @brief search romcode
+*    @param  [in]n num bus onewire
+*    @param  [in] uint8_t diff
+*    @param  [out] id romcode
+*    @return next_diff or OW_LAST_DEVICE or OW_DATA_ERR or OW_PRESENCE_ERR
+*     @date 30/08/2011
+*/
+uint8_t ow_rom_search(uint8_t n, uint8_t diff, uint8_t id[] ) {
+    uint8_t i, j, next_diff;
+    uint8_t b;
+    if ( ow_reset(n) )
+        return OW_PRESENCE_ERR;    // error, no device found
+    ow_byte_wr(n, OW_SEARCH_ROM );            // ROM search command 
+    next_diff = OW_LAST_DEVICE;            // unchanged on last device
+    i = OW_ROMCODE_SIZE * 8;                    // 8 bytes
+    do {
+        j = 8;                                // 8 bits
+        do {
+            b = ow_bit_io(n, 1 );                // read bit
+            if ( ow_bit_io(n, 1 ) ) {            // read complement bit
+                if ( b )                    // 11
+                {
+                   
+                    return OW_DATA_ERR;        // data error
+                }
+            } else {
+                if ( !b ) {                    // 00 = 2 devices
+                    if ( diff > i || ((*id & 1) && diff != i) ) {
+                        b = 1;                // now 1
+                        next_diff = i;        // next pass 0
+                    }
+                }
+            }
+            ow_bit_io(n, b );                 // write bit
+            
+            *id >>= 1;
+            if ( b ) 
+                *id |= 0x80;            // store bit
+            --i;
+        } while ( --j );
+        id++;                                // next byte
+        
+    } while ( i );
+
+
+    return next_diff;                // to continue search
+}
+
+
+//**********************************************************************************************************
+//*                                  test pin onewire bus
+//**********************************************************************************************************
+/**
+*     @brief test pin onewire bus
+*    @return etat pin ow
+*     @date 20/06/2011
+*/
+uint8_t ow_test_pin (void){
+    if (ow_pin)
+        return 1;
+return 0;   
+}
+
+/**
+*     @brief test pin onewire bus
+*       @param [in] num bus one wire
+*    @return etat pin ow
+*     @date 30/08/2011
+*/
+uint8_t ow_test_pin (uint8_t n){
+
+       if (*t_ow[n])
+            return 1;
+return 0; 
+}
+
+//**********************************************************************************************************
+//*                                  onewire reset bus
+//**********************************************************************************************************
+/**
+*     @brief onewire reset bus
+*    @return pin ow or OW_SHORT_CIRCUIT
+*     @date 20/06/2011
+*/
+uint8_t ow_reset(void) { // reset.  Should improve to act as a presence pulse
+    uint8_t err;
+
+    ow_pin.output();
+    ow_pin = 0;     // bring low for 500 us
+    wait_us(500);
+    ow_pin.input();
+    wait_us(60);
+    err = ow_pin;
+    wait_us(240);
+    if ( ow_pin == 0 )    {    // short circuit
+        err = OW_SHORT_CIRCUIT;
+    }
+    return err;
+}
+
+/**
+*     @brief onewire reset bus
+*       @param [in] num bus onewire
+*    @return pin ow or OW_SHORT_CIRCUIT
+*     @date 30/08/2011
+*/
+uint8_t ow_reset(uint8_t n) { // reset.  Should improve to act as a presence pulse
+    uint8_t err;
+    
+    t_ow[n]->output();
+    *t_ow[n] = 0;     // bring low for 500 us
+    wait_us(500);
+    t_ow[n]->input();
+    wait_us(60);
+    err = *t_ow[n];
+    wait_us(240);
+    if ( *t_ow[n] == 0 )    {    // short circuit
+        err = OW_SHORT_CIRCUIT;
+        
+    }
+    return err;
+}
+//**********************************************************************************************************
+//*                                  read write onewire
+//**********************************************************************************************************
+/**
+*     @brief read write onewire
+*    @param  [in/out] b data
+*    @return data
+*     @date 20/06/2011
+*/
+uint8_t ow_bit_io( uint8_t b ) {
+
+    ow_pin.output(); // drive bus low
+    ow_pin = 0;
+    wait_us(1); // Recovery-Time wuffwuff was 1
+    
+    if ( b ) 
+        ow_pin.input(); // if bit is 1 set bus high (by ext. pull-up)
+    //  delay was 15uS-1 see comment above
+    wait_us(15-1);
+    if ( ow_pin == 0 ) b = 0; // sample at end of read-timeslot
+    wait_us(60-15);
+    ow_pin.input();
+    return b;
+}
+/**
+*     @brief read write onewire
+*    @param  [in] n num bus onewire
+*    @param  [in/out] b data
+*    @return data
+*     @date 30/08/2011
+*/
+uint8_t ow_bit_io(uint8_t n, uint8_t b ) {
+
+    t_ow[n]->output(); // drive bus low
+    *t_ow[n] = 0;
+    wait_us(1); // Recovery-Time wuffwuff was 1
+    
+    if ( b ) 
+        t_ow[n]->input(); // if bit is 1 set bus high (by ext. pull-up)
+    //  delay was 15uS-1 see comment above
+    wait_us(15-1);
+    if ( *t_ow[n] == 0 ) b = 0; // sample at end of read-timeslot
+    wait_us(60-15);
+    t_ow[n]->input();
+   // printf("ow_bit_io n=%d b=%X\n",n,b);
+    return b;
+}
+//**********************************************************************************************************
+//*                                  byte write on onewire
+//**********************************************************************************************************
+/**
+*     @brief byte write on onewire
+*    @param  [in] b data
+*    @return data
+*     @date 20/06/2011
+*/
+uint8_t ow_byte_wr( uint8_t b ) {
+    uint8_t i = 8, j;
+
+    do {
+        j = ow_bit_io( b & 1 );
+        b >>= 1;
+        if ( j )
+            b |= 0x80;
+    } while ( --i );
+    return b;
+}
+/**
+*     @brief byte write on onewire
+*    @param  [in] n num bus onewire
+*    @param  [in] b data
+*    @return data
+*     @date 30/08/2011
+*/
+uint8_t ow_byte_wr(uint8_t n, uint8_t b ) {
+    uint8_t i = 8, j;
+
+    do {
+        j = ow_bit_io(n, b & 1 );
+        b >>= 1;
+        if ( j )
+            b |= 0x80;
+    } while ( --i );
+    return b;
+}
+//**********************************************************************************************************
+//*                                  byte write on onewire
+//**********************************************************************************************************
+/**
+*     @brief byte read on onewire
+*       @return data
+*     @date 20/06/2011
+*/
+uint8_t ow_byte_rd( void ) {
+    // read by sending 0xff (a dontcare?)
+    return ow_byte_wr( 0xFF );
+}
+
+/**
+*     @brief byte read on onewire
+*    @param  [in] n num onewire
+*    @return data
+*     @date 30/08/2011
+*/
+uint8_t ow_byte_rd( uint8_t n) {
+    // read by sending 0xff (a dontcare?)
+    return ow_byte_wr(n, 0xFF );
+}
+//**********************************************************************************************************
+//*                                  byte write on onewire
+//**********************************************************************************************************
+/**
+*     @brief write command
+*    @param  [in] command
+*    @param  [in] id romcode
+*     @date 20/06/2011
+*/
+uint8_t ow_command( uint8_t command, uint8_t id[] ) {
+    uint8_t i;
+
+    ow_reset();
+    if ( id ) {
+        ow_byte_wr( OW_MATCH_ROM );            // to a single device
+        i = OW_ROMCODE_SIZE;
+        do {
+            ow_byte_wr( *id );
+            ++id;
+        } while ( --i );
+    } else {
+        ow_byte_wr( OW_SKIP_ROM );            // to all devices
+    }
+    ow_byte_wr( command );
+    return 0;
+}
+/**
+*     @brief write command
+*    @param  [in] n num bus onewire
+*    @param  [in] command
+*    @param  [in] id romcode
+*     @date 30/08/2011
+*/
+uint8_t ow_command(uint8_t n, uint8_t command, uint8_t id[] ) {
+    uint8_t i;
+
+    ow_reset(n);
+    if ( id ) {
+        ow_byte_wr( n,OW_MATCH_ROM );            // to a single device
+        i = OW_ROMCODE_SIZE;
+        do {
+            ow_byte_wr(n, *id );
+            ++id;
+        } while ( --i );
+    } else {
+        ow_byte_wr(n, OW_SKIP_ROM );            // to all devices
+    }
+    ow_byte_wr(n, command );
+    return 0;
+}
+//**********************************************************************************************************
+//*                                  ow mode
+//**********************************************************************************************************
+/**
+*     @brief parasite enable
+*     @date 20/06/2011
+*/
+uint8_t ow_parasite_enable(void) {
+    ow_pin.output();
+    ow_pin = 1;
+    return 0;
+}
+/**
+*     @brief parasite disable
+*     @date 20/06/2011
+*/
+uint8_t ow_parasite_disable(void) {
+
+    ow_pin.input();
+    return 0;
+}
+
+/**
+*     @brief parasite enable
+*    @param  [in] n num bus onewire
+*     @date 30/08/2011
+*/
+uint8_t ow_parasite_enable(uint8_t n) {
+    t_ow[n]->output();
+    *t_ow[n] = 1;
+    return 0;
+}
+/**
+*     @brief parasite disable
+*    @param  [in] n num bus onewire
+*     @date 30/08/2011
+*/
+uint8_t ow_parasite_disable(uint8_t n) {
+    t_ow[n]->input();
+    return 0;
+}
+/**
+*     @brief PUL-UP bus OW
+*    @return OW_OK
+*     @date 20/06/2011
+*/
+uint8_t ow_PullUp(void)
+{
+    ow_pin.mode(PullUp); //PULL-UP bus OW
+return OW_OK;
+}
+/**
+*     @brief PUL-UP bus OW
+*    @param  [in] n num bus onewire
+*    @return OW_OK
+*     @date 30/08/2011
+*/
+uint8_t ow_PullUp(uint8_t n)
+{
+    t_ow[n]->mode(PullUp); //PULL-UP bus OW
+return OW_OK;
+}
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 onewire.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/onewire.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,79 @@
+/**
+* @file onewire.h
+* @brief library 1-Wire(www.maxim-ic.com)
+* @author Maciej Rajtar (Published 10 May 2010 www.mbed.org)
+* @author Frederic BLANC (Published 01/03/2012 www.mbed.org)
+*/
+
+#ifndef _onewire_
+#define _onewire_
+#include "DS2450.h"
+#include "DS18X20.h"
+#include "MAX31850.h"
+#include "crc8.h"
+#include "crc16.h"
+//#define DEBUG 1
+//#define DEBUG_L1 1
+#define ONEWIRE_PIN  p21
+
+#define MAXSENSORS 8
+#define MAXBUS 4
+// rom-code size including CRC
+#define OW_ROMCODE_SIZE 8
+
+#define OW_OK          0x00
+#define OW_ERROR       0x01
+#define OW_START_FAIL  0x02
+#define OW_ERROR_CRC   0x03
+#define OW_ERROR_BAD_ID 0x04
+#define OW_BUSY          0x05
+
+#define OW_MATCH_ROM    0x55
+#define OW_SKIP_ROM     0xCC
+#define OW_SEARCH_ROM   0xF0
+#define OW_READ_ROM     0x33
+#define OW_CONDITIONAL_SEARCH     0xEC
+#define OW_OVERDRIVE_SKIP_ROM     0x3C
+#define OW_OVERDRIVE_MATCH_ROM    0x69
+
+#define OW_SHORT_CIRCUIT   0xFF
+#define OW_SEARCH_FIRST    0xFF        // start new search
+#define OW_PRESENCE_ERR    0x01
+#define OW_DATA_ERR        0xFE
+#define OW_LAST_DEVICE     0x00        // last device found
+//            0x01 ... 0x40: continue searching
+
+
+
+char* ow_show_id( uint8_t id[],char *text); 
+uint64_t uint64_id( uint8_t id[]);
+
+uint8_t search_sensors(uint8_t *nSensors,uint8_t id[][OW_ROMCODE_SIZE] );
+uint8_t search_sensors(uint8_t n,uint8_t *nSensors,uint8_t gSensorIDs[][MAXSENSORS][OW_ROMCODE_SIZE] );
+uint8_t ow_PullUp(void);
+uint8_t ow_PullUp(uint8_t n);
+
+
+uint8_t ow_test_pin (void);
+uint8_t ow_test_pin (uint8_t n);
+uint8_t ow_reset(void);
+uint8_t ow_reset(uint8_t n);
+uint8_t ow_rom_search( uint8_t diff, uint8_t id[] );
+uint8_t ow_rom_search(uint8_t n, uint8_t diff, uint8_t id[] );
+uint8_t ow_command( uint8_t command, uint8_t id[] );
+uint8_t ow_command(uint8_t n, uint8_t command, uint8_t id[] );
+uint8_t ow_find_sensor(uint8_t *diff, uint8_t id[]);
+uint8_t ow_find_sensor(uint8_t n,uint8_t *diff, uint8_t id[]);
+uint8_t ow_parasite_enable(void);
+uint8_t ow_parasite_enable(uint8_t n);
+uint8_t ow_parasite_disable(void);
+uint8_t ow_parasite_disable(uint8_t n);
+uint8_t ow_bit_io( uint8_t b );
+uint8_t ow_bit_io(uint8_t n, uint8_t b);
+uint8_t ow_byte_wr( uint8_t b );
+uint8_t ow_byte_wr(uint8_t n, uint8_t b );
+uint8_t ow_byte_rd( void );
+uint8_t ow_byte_rd( uint8_t n);
+
+
+#endif
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 utils.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utils.cpp	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,12 @@
+#include <stdint.h>
+
+uint16_t uint8_to_uint16(uint8_t lsb, uint8_t msb)
+{
+    uint16_t data;
+    uint8_t *ptr;
+    
+    ptr=(uint8_t*)&data;
+    *ptr=lsb;
+    *++ptr=msb;
+    return data;
+}
\ No newline at end of file
diff -r 000000000000 -r 9acbbb021a43 utils.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utils.h	Thu Feb 12 14:03:55 2015 +0000
@@ -0,0 +1,4 @@
+#ifndef _utils_
+#define _utils_
+uint16_t uint8_to_uint16(uint8_t lsb, uint8_t msb);
+#endif
\ No newline at end of file