ClearOne Writing StreamNet User Manual

Page 54

Writing StreamNet Device Drivers

D-2

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Get and Process Input from Serial Port

-- function PerformReset()

Perform a soft reset of the zTuner when we seem to have lost

communications

-- function QueryStatus()

Periodically query for the frequency of the tuner. This is more

important with V1 tuners that have no unsolicited messages

-- function RefreshFrequency()

Send command to get the frequency from tuner

-- function RequestV2Status()

Send command to refresh the V2 tuner's status info

-- function SendPower(bOn)

Send command to power the tuner on (or off)

-- function WriteMessage(message)

Decode and send commands to the tuner

-- uncomment the next line for any hope of debugging startup issues

-- setDebug("all", "on")

setDebug("error", "on")

debug("Driver loading")

-- setup our constants

IDLE = 0

FREQUENCY_FIRST = 1

FREQUENCY_LAST = 2

BAND = 3

POWER_STATE = 4

FM = 0

AM = 1

BANDNAME = {

[FM] = "FM ",

[AM] = "AM "

}

-- setup our module variables

serialPort = nil

bIsV2 = false;

szFreq = "---.-"

nResponseTimeout = 0

nExpectedRX = IDLE

nRefreshPowerTimeout = 5

nRefreshFreqTimeout = 0

nTimeouts = 0

nBand = FM

szInput = ""

szPwrOn = "0"

-- We have to create our functions first then we can use them below