NI DAQMX Write Attributes - ni/grpc-device GitHub Wiki
See how to get and set attributes.
- DAQmx_Write_RelativeTo
- DAQmx_Write_Offset
- DAQmx_Write_RegenMode
- Status
- Advanced
Data Type: | int32 |
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Description: | Specifies the point in the buffer at which to write data. If you also specify an offset with DAQmx_Write_Offset, the write operation begins at that offset relative to this point you select with this property. |
Valid values
DAQmx_Val_FirstSample | 10424 | Write samples relative to the first sample. |
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DAQmx_Val_CurrWritePos | 10430 | Write samples relative to the current position in the buffer. |
You can get/set/reset this attribute using:
DAQmxGetWriteAttribute
DAQmxSetWriteAttribute
DAQmxResetWriteAttribute
Data Type: | int32 |
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Description: | Specifies in samples per channel an offset at which a write operation begins. This offset is relative to the location you specify with DAQmx_Write_RelativeTo. |
You can get/set/reset this attribute using:
DAQmxGetWriteAttribute
DAQmxSetWriteAttribute
DAQmxResetWriteAttribute
Data Type: | int32 |
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Description: | Specifies whether to allow NI-DAQmx to generate the same data multiple times. |
Valid values
DAQmx_Val_AllowRegen | 10097 | Allow NI-DAQmx to regenerate samples that the device previously generated. When you choose this value, the write marker returns to the beginning of the buffer after the device generates all samples currently in the buffer. |
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DAQmx_Val_DoNotAllowRegen | 10158 | Do not allow NI-DAQmx to regenerate samples the device previously generated. When you choose this value, NI-DAQmx waits for you to write more samples to the buffer or until the timeout expires. |
You can get/set/reset this attribute using:
DAQmxGetWriteAttribute
DAQmxSetWriteAttribute
DAQmxResetWriteAttribute
Data Type: | uInt64 |
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Description: | Indicates the position in the buffer of the next sample to generate. This value is identical for all channels in the task. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates if the device(s) detected an overcurrent condition for any channel in the task. Reading this property clears the overcurrent status for all channels in the task. You must read this property before you read DAQmx_Write_OvercurrentChans. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates a list of names of any virtual channels in the task for which an overcurrent condition has been detected. You must read DAQmx_Write_OvercurrentChansExist before you read this property. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates if the device(s) detected an overtemperature condition in any virtual channel in the task. Reading this property clears the overtemperature status for all channels in the task. You must read this property before you read DAQmx_Write_OvertemperatureChans. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates a list of names of any overtemperature virtual channels. You must read DAQmx_Write_OvertemperatureChansExist before you read this property. Otherwise, you will receive an error. The list of names may be empty if the device cannot determine the source of the overtemperature. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates if the device(s) detected an External Overvoltage condition for any channel in the task. Reading this property clears the External Overvoltage status for all channels in the task. You must read this property before you read External OvervoltageChans. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates a list of names of any virtual channels in the task for which an External Overvoltage condition has been detected. You must read External OvervoltageChansExist before you read this property. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates if the device(s) detected an overload in any virtual channel in the task. Reading this property clears the overload status for all channels in the task. You must read this property before you read DAQmx_Write_OverloadedChans. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates a list of names of any overloaded virtual channels in the task. You must read DAQmx_Write_OverloadedChansExist before you read this property. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates if the device(s) detected an open current loop for any channel in the task. Reading this property clears the open current loop status for all channels in the task. You must read this property before you read DAQmx_Write_OpenCurrentLoopChans. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates a list of names of any virtual channels in the task for which the device(s) detected an open current loop. You must read DAQmx_Write_OpenCurrentLoopChansExist before you read this property. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates if the device(s) detected a power supply fault for any channel in the task. Reading this property clears the power supply fault status for all channels in the task. You must read this property before you read DAQmx_Write_PowerSupplyFaultChans. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates a list of names of any virtual channels in the task that have a power supply fault. You must read DAQmx_Write_PowerSupplyFaultChansExist before you read this property. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates whether the target is currently locked to the grand master. Devices may report PLL Unlock either during acquisition or after acquisition. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates the channels from devices in an unlocked target. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | uInt32 |
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Description: | Indicates in samples per channel the amount of available space in the buffer. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | uInt64 |
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Description: | Indicates the total number of samples generated by each channel in the task. This value is identical for all channels in the task. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | bool32 |
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Description: | Indicates if any devices in the task detected the insertion or removal of an accessory since the task started. Reading this property clears the accessory change status for all channels in the task. You must read this property before you read DAQmx_Write_DevsWithInsertedOrRemovedAccessories. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | char* |
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Description: | Indicates the names of any devices that detected the insertion or removal of an accessory since the task started. You must read DAQmx_Write_AccessoryInsertionOrRemovalDetected before you read this property. Otherwise, you will receive an error. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | uInt32 |
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Description: | Indicates in bytes the required size of a raw sample to write to the task. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | uInt32 |
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Description: | Indicates the number of channels that an NI-DAQmx Write function writes to the task. This value is the number of channels in the task. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute
Data Type: | int32 |
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Description: | Specifies how an NI-DAQmx Write function waits for space to become available in the buffer. |
Valid values
DAQmx_Val_Poll | 12524 | Repeatedly check for available buffer space as fast as possible. This mode allows for the highest sampling rates at the expense of CPU efficiency. |
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DAQmx_Val_Yield | 12525 | Repeatedly check for available buffer space, but yield control to other threads after each check. This mode offers a balance between sampling rate and CPU efficiency. |
DAQmx_Val_Sleep | 12547 | Check for available buffer space once per the amount of time specified in DAQmx_Write_SleepTime. |
You can get/set/reset this attribute using:
DAQmxGetWriteAttribute
DAQmxSetWriteAttribute
DAQmxResetWriteAttribute
Data Type: | float64 |
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Description: | Specifies in seconds the amount of time to sleep after checking for available buffer space if DAQmx_Write_WaitMode is DAQmx_Val_Sleep. |
You can get/set/reset this attribute using:
DAQmxGetWriteAttribute
DAQmxSetWriteAttribute
DAQmxResetWriteAttribute
Data Type: | uInt32 |
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Description: | Indicates the number of Boolean values expected per channel in a sample for line-based writes. This property is determined by the channel in the task with the most digital lines. If a channel has fewer lines than this number, NI-DAQmx ignores the extra Boolean values. |
Restrictions: | Not Settable |
You can get this attribute using:
DAQmxGetWriteAttribute