FORUM.M.NU

Kod: Markera allt

Read_TC_Volts:
  OWOUT OW, %0001, [SkipNet, RdReg, $0E]      ' read current register
  OWIN OW, %0010, [tCuV.BYTE1, tCuV.BYTE0]
  sign = tCuV.BIT15                                           ' save sign bit
  tCuV = tCuV >> 3                                            ' correct alignment
  IF sign THEN
    tCuV = tCuV | $F000 ' pad 2's-compliment bits
  ENDIF
  tCuV = ABS tCuV */ 4000                                 ' x 15.625 uV
  RETURN

Kod: Markera allt

#include <OneWire.h>
#include <DallasTemperature.h>
#include <DS2762.h>
#include <thermocouple.h>

#define MAX_NAME_LEN
#define MAX_TEMP_SENSORS 16
#define ONE_WIRE_BUS 2
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

typedef enum sensor_type_e
{
    SENSOR_DS18B20,
    SENSOR_DS2762
} sensor_type_t;

typedef struct TempSensor
{
    DeviceAddress addr;
    char name[MAX_NAME_LEN];
    float temp;
    sensor_type_t type;
} TempSensor;

TempSensor temps[MAX_TEMP_SENSORS];
int temp_count;

...

void get_name(TempSensor *s)
{
    // Read names from eeprom.
    ...
}


void setup()
{
    ...

    // Find all sensors on onewire bus.
    sensors.begin();
    temp_count = sensors.getDeviceCount();

    for (int i = 0; i < temp_count; i++)
    {
        // Save addresses.
        sensors.getAddress(temps[i].addr, i);

        // Only use the dallas API towards D18B20 sensors.
        if (sensors.validFamily())
        {
            temps[i].type = SENSOR_DS18B20;
        }
        else
        {
            temps[i].type = SENSOR_DS2762;
        }

        get_name(&temps[i]);
    }
}

void loop()
{
    ...
    for (int i = 0; i < temp_count; i++)
    {
        // Just for convenience...
        TempSensor *s = &temps[i];

        if (s->type == )
        {
            sensors.requestTemperaturesByAddress(s->addr);
            s->temp = sensors.getTempC(s->addr);
        }
        else
        {
            DS2762 ds(&oneWire, s->addr);

            // Each raw value count equals 15.625 microVolt, we want it in milivolts.
            unsigned long current = (unsigned long)ds.readCurrentRaw() * 15.625;

            // Each raw value count equals 0.125C, 
            // The thermocouple lib wants it x1000.
            // So 0.125*1000 = 125.
            unsigned long ambient_temp = ds.readTempRaw() * 125ul;
            long raw_temp = thermocoupleConvertWithCJCompensation(current, ambient_temp);

            s->temp = (double)raw_temp / 1000;
        }
    }
}