Rainer Raul / Mbed 2 deprecated OneWireDrv

Test 1-wire , working wtih parasite power and few sensors with mixed power supply.

Dependencies:   mbed

main.cpp@0:1197076b78f4, 2010-05-10 (annotated)

Committer:
macraj
Date:
Mon May 10 08:14:32 2010 +0000
Revision:
0:1197076b78f4

        

        
Who changed what in which revision?

        

            
                
UserRevisionLine numberNew contents of line

            
            


macraj

0:1197076b78f4


     1

#include "mbed.h"





macraj

0:1197076b78f4


     2

#include "onewire.h"





macraj

0:1197076b78f4


     3







macraj

0:1197076b78f4


     4







macraj

0:1197076b78f4


     5







macraj

0:1197076b78f4


     6

BYTE gSensorIDs[MAXSENSORS][OW_ROMCODE_SIZE];





macraj

0:1197076b78f4


     7







macraj

0:1197076b78f4


     8

Serial pc(USBTX, USBRX); // tx, rx





macraj

0:1197076b78f4


     9







macraj

0:1197076b78f4


    10

BYTE search_sensors(void) {





macraj

0:1197076b78f4


    11

    BYTE i;





macraj

0:1197076b78f4


    12

    BYTE id[OW_ROMCODE_SIZE];





macraj

0:1197076b78f4


    13

    BYTE diff, nSensors;





macraj

0:1197076b78f4


    14







macraj

0:1197076b78f4


    15

    printf( "Scanning Bus for DS18X20\n" );





macraj

0:1197076b78f4


    16







macraj

0:1197076b78f4


    17

    nSensors = 0;





macraj

0:1197076b78f4


    18







macraj

0:1197076b78f4


    19

    for ( diff = OW_SEARCH_FIRST;





macraj

0:1197076b78f4


    20

            diff != OW_LAST_DEVICE && nSensors < MAXSENSORS ; ) {





macraj

0:1197076b78f4


    21

        DS18X20_find_sensor( &diff, &id[0] );





macraj

0:1197076b78f4


    22







macraj

0:1197076b78f4


    23

        if ( diff == OW_PRESENCE_ERR ) {





macraj

0:1197076b78f4


    24

            printf( "No Sensor found\n" );





macraj

0:1197076b78f4


    25

            break;





macraj

0:1197076b78f4


    26

        }





macraj

0:1197076b78f4


    27







macraj

0:1197076b78f4


    28

        if ( diff == OW_DATA_ERR ) {





macraj

0:1197076b78f4


    29

            printf( "Bus Error\n" );





macraj

0:1197076b78f4


    30

            break;





macraj

0:1197076b78f4


    31

        }





macraj

0:1197076b78f4


    32







macraj

0:1197076b78f4


    33

        for (i=0;i<OW_ROMCODE_SIZE;i++)





macraj

0:1197076b78f4


    34

            gSensorIDs[nSensors][i]=id[i];





macraj

0:1197076b78f4


    35







macraj

0:1197076b78f4


    36

        nSensors++;





macraj

0:1197076b78f4


    37

    }





macraj

0:1197076b78f4


    38







macraj

0:1197076b78f4


    39

    return nSensors;





macraj

0:1197076b78f4


    40

}





macraj

0:1197076b78f4


    41







macraj

0:1197076b78f4


    42

void uart_put_temp(const uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits) {





macraj

0:1197076b78f4


    43

//   uint8_t buffer[sizeof(int)*8+1];





macraj

0:1197076b78f4


    44

    uint16_t decicelsius;





macraj

0:1197076b78f4


    45







macraj

0:1197076b78f4


    46

    float temperature;





macraj

0:1197076b78f4


    47

    pc.printf("[%s", (subzero)?"-":"+");





macraj

0:1197076b78f4


    48

//    pc.printf("%d.",cel);





macraj

0:1197076b78f4


    49

    //itoa((cel_frac_bits*DS18X20_FRACCONV),buffer,10);





macraj

0:1197076b78f4


    50

    //sprintf(buffer, "%d",(cel_frac_bits*DS18X20_FRACCONV));





macraj

0:1197076b78f4


    51

    //j=4-strlen(buffer);





macraj

0:1197076b78f4


    52

    //for (i=0;i<j;i++) pc.printf("0");





macraj

0:1197076b78f4


    53

    //pc.printf("%s °C [",buffer);





macraj

0:1197076b78f4


    54

//    pc.printf("  freak %d ::", (cel_frac_bits*DS18X20_FRACCONV));





macraj

0:1197076b78f4


    55

    // "rounding"





macraj

0:1197076b78f4


    56

    //pc.printf((subzero)?'-':'+');





macraj

0:1197076b78f4


    57

    decicelsius = DS18X20_temp_to_decicel(subzero, cel, cel_frac_bits);





macraj

0:1197076b78f4


    58

    temperature = decicelsius;





macraj

0:1197076b78f4


    59

    temperature = temperature/10;





macraj

0:1197076b78f4


    60

    pc.printf("%4.1f C]\n", temperature);





macraj

0:1197076b78f4


    61







macraj

0:1197076b78f4


    62

    //pc.printf( "%d 0°C]\n",decicelsius);





macraj

0:1197076b78f4


    63







macraj

0:1197076b78f4


    64

}





macraj

0:1197076b78f4


    65







macraj

0:1197076b78f4


    66







macraj

0:1197076b78f4


    67







macraj

0:1197076b78f4


    68







macraj

0:1197076b78f4


    69

int main(void) {





macraj

0:1197076b78f4


    70







macraj

0:1197076b78f4


    71

    pc.printf("Qantum 1 wire interface test!\n");





macraj

0:1197076b78f4


    72

    uint8_t nSensors, i;





macraj

0:1197076b78f4


    73

    uint8_t subzero, cel, cel_frac_bits;





macraj

0:1197076b78f4


    74







macraj

0:1197076b78f4


    75

    nSensors = search_sensors();





macraj

0:1197076b78f4


    76







macraj

0:1197076b78f4


    77

    ow_command( DS18X20_CONVERT_T, 0);





macraj

0:1197076b78f4


    78







macraj

0:1197076b78f4


    79

    pc.printf("Sensors found : %d\n", nSensors);





macraj

0:1197076b78f4


    80

    if (nSensors > 0) {





macraj

0:1197076b78f4


    81

        for (i=0; i<nSensors; i++) {





macraj

0:1197076b78f4


    82

            pc.printf("Sensor # %d is a ", i+1);





macraj

0:1197076b78f4


    83

            if ( gSensorIDs[i][0] == DS18S20_ID) {





macraj

0:1197076b78f4


    84

                pc.printf("DS18S20/DS1820 ");





macraj

0:1197076b78f4


    85

            } else pc.printf("DS18B20 ");





macraj

0:1197076b78f4


    86

            if ( DS18X20_get_power_status( &gSensorIDs[i][0] ) ==





macraj

0:1197076b78f4


    87

                    DS18X20_POWER_PARASITE )





macraj

0:1197076b78f4


    88

                pc.printf( "parasite" );





macraj

0:1197076b78f4


    89

            else pc.printf( "externally" );





macraj

0:1197076b78f4


    90

            pc.printf( " powered\n" );





macraj

0:1197076b78f4


    91

            DS18X20_show_id_uart( &gSensorIDs[i][0], OW_ROMCODE_SIZE );





macraj

0:1197076b78f4


    92

        }





macraj

0:1197076b78f4


    93

    }





macraj

0:1197076b78f4


    94







macraj

0:1197076b78f4


    95

    pc.printf( "Convert_T and Read Sensor by Sensor (reverse order)\n" );





macraj

0:1197076b78f4


    96

    for ( i=nSensors; i>0; i-- ) {





macraj

0:1197076b78f4


    97

        if ( DS18X20_start_meas( DS18X20_POWER_PARASITE, &gSensorIDs[i-1][0] ) == DS18X20_OK ) {





macraj

0:1197076b78f4


    98

            wait_ms(DS18B20_TCONV_12BIT);





macraj

0:1197076b78f4


    99

            pc.printf("Sensor# %d = ", i);





macraj

0:1197076b78f4


   100

            if ( DS18X20_read_meas( &gSensorIDs[i-1][0], &subzero, &cel, &cel_frac_bits) == DS18X20_OK ) {





macraj

0:1197076b78f4


   101

                uart_put_temp(subzero, cel, cel_frac_bits);





macraj

0:1197076b78f4


   102

            } else pc.printf("CRC Error (lost connection?)\n");





macraj

0:1197076b78f4


   103







macraj

0:1197076b78f4


   104

        } else pc.printf("Start meas. failed (short circuit?)\n");





macraj

0:1197076b78f4


   105

    }





macraj

0:1197076b78f4


   106







macraj

0:1197076b78f4


   107

    while (1) {





macraj

0:1197076b78f4


   108

        for ( i=nSensors; i>0; i-- ) {





macraj

0:1197076b78f4


   109

            // if ( DS18X20_start_meas( DS18X20_POWER_PARASITE, &gSensorIDs[i-1][0] ) == DS18X20_OK ) {





macraj

0:1197076b78f4


   110

            pc.printf("Sensor# %d = ", i);





macraj

0:1197076b78f4


   111

            if ( DS18X20_read_meas( &gSensorIDs[i-1][0], &subzero, &cel, &cel_frac_bits) == DS18X20_OK ) {





macraj

0:1197076b78f4


   112

                uart_put_temp(subzero, cel, cel_frac_bits);





macraj

0:1197076b78f4


   113

            } else pc.printf("CRC Error (lost connection?)\n");





macraj

0:1197076b78f4


   114

           





macraj

0:1197076b78f4


   115

            //if ( DS18X20_start_meas( DS18X20_POWER_PARASITE, &gSensorIDs[i-1][0] ) == DS18X20_OK ) {





macraj

0:1197076b78f4


   116

            //} else pc.printf("Start meas. failed (short circuit?)\n");





macraj

0:1197076b78f4


   117

        }





macraj

0:1197076b78f4


   118

            ow_command( DS18X20_CONVERT_T, 0);





macraj

0:1197076b78f4


   119

            ow_parasite_enable();





macraj

0:1197076b78f4


   120







macraj

0:1197076b78f4


   121







macraj

0:1197076b78f4


   122

        //  ow_reset();





macraj

0:1197076b78f4


   123

        //   ow_command( DS18X20_CONVERT_T, 0);





macraj

0:1197076b78f4


   124

        //   ow_parasite_enable();





macraj

0:1197076b78f4


   125

        wait(10);





macraj

0:1197076b78f4


   126

        //   ow_parasite_disable();





macraj

0:1197076b78f4


   127







macraj

0:1197076b78f4


   128

    }





macraj

0:1197076b78f4


   129







macraj

0:1197076b78f4


   130

}





macraj

0:1197076b78f4


   131