max31856 - max31856 Thermocouple temperature detection

Adaptation status unknown

Note

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Example

--Note: due to the use of sys.wait() all api need to be used in the coroutine
--Note: The configuration of the ads1115 needs to be configured according to the project requirements. You need to reconfigure the ADS1115_CONF_HCMD and ADS1115_CONF_LCMD !!!
-- Usage Examples
max31856 = require("max31856")

sys.taskInit(function()
    max31856_spi_device = spi.deviceSetup(1,pin.PB11,1,1,8,5*1000*1000,spi.MSB,1,0)
    max31856.init(max31856_spi_device)
    while 1 do
        local cj_temp = max31856.read_cj_temp()
        if cj_temp then
            log.info("max31856 cj_temp: ", cj_temp)
        end
        local tc_temp = max31856.read_tc_temp()
        if tc_temp then
            log.info("max31856 tc_temp: ", tc_temp)
        end
        log.info("max31856 fault: ", max31856.read_fault())
        sys.wait(1000)
    end
end)

max31856.set_tc_type(type)

Setting the Thermocouple Type

Parameters

Incoming Value Type	Explanation
number	type max31856.TCTYPE_B max31856.TCTYPE_E max31856.TCTYPE_J max31856.TCTYPE_K max31856.TCTYPE_N max31856.TCTYPE_R max31856.TCTYPE_S max31856.TCTYPE_T

Return Value

None

Examples

max31856.set_tc_type(max31856.TCTYPE_K) -- Set the type K

---

max31856.set_avgsel(sample_count)

Setting the Thermocouple Voltage Transition Averaging Mode

Parameters

Incoming Value Type	Explanation
number	sample_count max31856.SAMPLE1 max31856.SAMPLE2 max31856.SAMPLE4 max31856.SAMPLE8 max31856.SAMPLE16

Return Value

None

Examples

max31856.set_avgsel(max31856.SAMPLE1) -- Set the average mode to 1 sample

---

max31856.set_cmode(type)

Set conversion mode

Parameters

Incoming Value Type	Explanation
number	type max31856.ONESHOT max31856.CONTINUOUS

Return Value

None

Examples

max31856.set_cmode(max31856.ONESHOT) -- Set the conversion mode to single conversion

---

max31856.read_fault()

Read error code

Parameters

None

Return Value

return value type	explanation
number	Error Code

Examples

local fault = max31856.read_fault()

---

max31856.read_cj_temp()

Read cold junction temperature

Parameters

None

Return Value

return value type	explanation
number	Cold End Temperature

Examples

local cj_temp = max31856.read_cj_temp()

---

max31856.read_tc_temp()

Read tc temperature

Parameters

None

Return Value

return value type	explanation
number	tc Temperature

Examples

local tc_temp = max31856.read_tc_temp()

---

max31856.init(spi_device)

max31856 Initialization

Parameters

Incoming Value Type	Explanation
userdata	spi_device spi Device Handle

Return Value

return value type	explanation
boolean	Initialization successful return true

Examples

max31856.init(spi_device)

---