SM_Close SM_ConfigureSerialConnection SM_ConfigureSerialTimeouts SM_CustomMessage SM_GetAnalogConfig SM_GetAnalogInputConfig SM_GetAnalogInputRanges SM_GetAnalogOutputRanges SM_GetDeviceConfig SM_GetFirmwareVersion SM_GetLastError SM_GetLastFTDIError SM_GetLastWin32Error SM_GetPIODirection SM_GetPIOPresets SM_GlobalCommsReset SM_NotifyInputState SM_NotifyOnInputChange SM_Open SM_OpenSecure SM_ReadAnalogInputs SM_ReadAnalogOutputs SM_ReadDigitalInputs SM_ReadDigitalOutputs SM_ReadPIO SM_SelectDevice SM_SetAnalogConfig SM_SetAnalogInputConfig SM_SetAnalogInputRanges SM_SetCommunications SM_SetPIODirection SM_SetPIOPresets SM_SetPolarity SM_SetSoftwareAddress SM_Version SM_WriteAnalogOutputs SM_WriteDigitalOutputs SM_WritePIO

int __stdcall SM_SetPolarity ( SM_HANDLE  handle, bool  activeLow  ) Configures the polarity of all Digital IO reads and writes. Parameters [in] handle Valid handle returned by SM_Open(). [in] activeLow Use active-low polarity instead of typical active-high. Return values 0 Success. -1 Invalid SeaMAX handle. -2 No module detected. Calling this modifier will cause all read and write Digital IO requests to be mutated to use the indicated polarity. Set the boolean value FALSE to use typical active-high logic states i.e. a logic high is representative of a physical high signal. Likewise set the boolean value TRUE to use the reverse logic i.e. a logic low is representative of a physical low or grounded signal. When using Form C relays this will have the effect of reversing the NC and NO contacts. Note If a different device is selected at a future time, it is possible that the polarity could change again depending on the configuration of the selected device. Therefore, it is necessary to re-issue this call whenever selecting a new device to ensure consistency. References SM_GetConfig().