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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