frederic blanc
test MAX31850
Diff: OneWire/onewire.cpp
- Revision:
- 4:031e71e61e80
- Parent:
- 3:b4277f7c538e
--- a/OneWire/onewire.cpp Mon Jun 02 13:17:18 2014 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,575 +0,0 @@
-/**
-* @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