Documentation
¶
Overview ¶
Package daq provides a generic HTTP interface to ADC and DAC devices
This is not the last word in speed, due to HTTP having reasonable latency in most client languages, but it is the last word in ease of use.
Index ¶
- func GetOperatingMode(d WaveformDAC) http.HandlerFunc
- func GetOutputSimultaneous(d ExtendedDAC) http.HandlerFunc
- func GetRange(d ExtendedDAC) http.HandlerFunc
- func GetTimerPeriod(t Timer) http.HandlerFunc
- func GetTriggerDirection(t TriggerExport) http.HandlerFunc
- func GetTriggerMode(d WaveformDAC) http.HandlerFunc
- func HTTPBasicDAC(iface DAC, table generichttp.RouteTable)
- func HTTPExtended(iface ExtendedDAC, table generichttp.RouteTable)
- func HTTPMultiChannel(iface MultiChannelDAC, table generichttp.RouteTable)
- func HTTPTimer(iface Timer, table generichttp.RouteTable)
- func HTTPWaveform(iface WaveformDAC, table generichttp.RouteTable)
- func LoadCSVFloats(d TimerDAC, r io.Reader, periodNano uint32) error
- func Output(d DAC) http.HandlerFunc
- func OutputDN16(d DAC) http.HandlerFunc
- func OutputMulti(d MultiChannelDAC) http.HandlerFunc
- func OutputMultiDN16(d MultiChannelDAC) http.HandlerFunc
- func SetOperatingMode(d WaveformDAC) http.HandlerFunc
- func SetOutputSimultaneous(d ExtendedDAC) http.HandlerFunc
- func SetRange(d ExtendedDAC) http.HandlerFunc
- func SetTimerPeriod(t Timer) http.HandlerFunc
- func SetTriggerDirection(t TriggerExport) http.HandlerFunc
- func SetTriggerMode(d WaveformDAC) http.HandlerFunc
- func StartWaveform(d WaveformDAC) http.HandlerFunc
- func StopWaveform(d WaveformDAC) http.HandlerFunc
- func UploadWaveformFloatCSV(d WaveformDAC) http.HandlerFunc
- type ChannelWaveformDN
- type ChannelWaveformVolt
- type DAC
- type ExtendedDAC
- type HTTPDAC
- type MultiChannelDAC
- type Timer
- type TimerDAC
- type TriggerExport
- type WaveformDAC
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func GetOperatingMode ¶
func GetOperatingMode(d WaveformDAC) http.HandlerFunc
GetOperatingMode retrieves whether the dac is in "single" or "waveform" mode
func GetOutputSimultaneous ¶
func GetOutputSimultaneous(d ExtendedDAC) http.HandlerFunc
GetOutputSimultaneous retrieves if the output of a channel of a DAC is simultaneous
func GetRange ¶
func GetRange(d ExtendedDAC) http.HandlerFunc
GetRange configures the output range of one channel of a DAC
func GetTimerPeriod ¶
func GetTimerPeriod(t Timer) http.HandlerFunc
GetTimerPeriod invokes the function of the same name on a timer
func GetTriggerDirection ¶
func GetTriggerDirection(t TriggerExport) http.HandlerFunc
GetTriggerDirection invokes the function of the same name on a Trigger
func GetTriggerMode ¶
func GetTriggerMode(d WaveformDAC) http.HandlerFunc
GetTriggerMode retrieves whether the dac is in "single" or "waveform" mode
func HTTPBasicDAC ¶
func HTTPBasicDAC(iface DAC, table generichttp.RouteTable)
HTTPBasicDAC adds routes for basic DAC operation to a table
func HTTPExtended ¶
func HTTPExtended(iface ExtendedDAC, table generichttp.RouteTable)
HTTPExtended adds routes for multi channel output to the table
func HTTPMultiChannel ¶
func HTTPMultiChannel(iface MultiChannelDAC, table generichttp.RouteTable)
HTTPMultiChannel adds routes for multi channel output to the table
func HTTPTimer ¶
func HTTPTimer(iface Timer, table generichttp.RouteTable)
HTTPTimer adds routes for basic Timer operation to a table
func HTTPWaveform ¶
func HTTPWaveform(iface WaveformDAC, table generichttp.RouteTable)
HTTPWaveform adds routes for multi channel output to the table
func LoadCSVFloats ¶
LoadCSVFloats populates the waveform table of a DAC and sets the sampling period in nanoseconds. r is not closed and must be managed by the caller. Playback is not started.
func Output ¶
func Output(d DAC) http.HandlerFunc
Output returns an HTTP handlerfunc that will write a voltage to a channel
func OutputDN16 ¶
func OutputDN16(d DAC) http.HandlerFunc
OutputDN16 returns an HTTP handlerfunc that will write a data number to a channel
func OutputMulti ¶
func OutputMulti(d MultiChannelDAC) http.HandlerFunc
OutputMulti returns an HTTP handlerfunc that will write a voltage to a channel
func OutputMultiDN16 ¶
func OutputMultiDN16(d MultiChannelDAC) http.HandlerFunc
OutputMultiDN16 returns an HTTP handlerfunc that will write a data number to a channel
func SetOperatingMode ¶
func SetOperatingMode(d WaveformDAC) http.HandlerFunc
SetOperatingMode configures the operating mode of a DAC between "single" and "waveform" modes
func SetOutputSimultaneous ¶
func SetOutputSimultaneous(d ExtendedDAC) http.HandlerFunc
SetOutputSimultaneous configures the output channel of a DAC to be simultaneous
func SetRange ¶
func SetRange(d ExtendedDAC) http.HandlerFunc
SetRange configures the output range of one channel of a DAC
func SetTimerPeriod ¶
func SetTimerPeriod(t Timer) http.HandlerFunc
SetTimerPeriod invokes the function of the same name on a timer
func SetTriggerDirection ¶
func SetTriggerDirection(t TriggerExport) http.HandlerFunc
SetTriggerDirection causes the device to export a trigger if True, else import
func SetTriggerMode ¶
func SetTriggerMode(d WaveformDAC) http.HandlerFunc
SetTriggerMode configures the operating mode of a DAC between "single" and "waveform" modes
func StartWaveform ¶
func StartWaveform(d WaveformDAC) http.HandlerFunc
StartWaveform commences waveform playback
func StopWaveform ¶
func StopWaveform(d WaveformDAC) http.HandlerFunc
StopWaveform ceases waveform playback
func UploadWaveformFloatCSV ¶
func UploadWaveformFloatCSV(d WaveformDAC) http.HandlerFunc
UploadWaveformFloatCSV is an HTTP interface to multiple PopulateWaveform calls from one CSV file
Types ¶
type ChannelWaveformDN ¶
type ChannelWaveformDN struct {
// contains filtered or unexported fields
}
ChannelWaveformDN is a combination of a channel index and waveform data
func CSVToWaveformDN ¶
func CSVToWaveformDN(r io.Reader) ([]ChannelWaveformDN, error)
CSVToWaveformDN reads a csv file in r to a list of channel-waveform combinations the columns of r are to be 16 bit DNs, 0 to 2^16. The header row is to specify channel numbers. A sample file has head: 0,1,2 0,32768,65535
where 0,1,2 are channel #s on the DAC
type ChannelWaveformVolt ¶
type ChannelWaveformVolt struct {
// contains filtered or unexported fields
}
ChannelWaveformVolt is a combination of a channel index and waveform data
func CSVToWaveformFloat ¶
func CSVToWaveformFloat(r io.Reader) ([]ChannelWaveformVolt, error)
CSVToWaveformFloat reads a csv file in r to a list of channel-waveform combinations the columns of r are to be floating point voltages. The header row is to specify channel numbers. A sample file has head: 0,1,2 -10,0,10
where 0,1,2 are channel #s on the DAC
type DAC ¶
type DAC interface {
// Output sends a voltage on a given channel
Output(int, float64) error
// OutputDN sends a data number on a given channel
OutputDN16(int, uint16) error
}
DAC is a model for simple digital to analog converter
type ExtendedDAC ¶
type ExtendedDAC interface {
MultiChannelDAC
// SetRange sets the output range of a DAC channel
SetRange(int, string) error
// GetRange returns the output range of a DAC channel
GetRange(int) (string, error)
// SetOutputSimultaneous configures a channel for simultaneous output
SetOutputSimultaneous(int, bool) error
// GetOutputSimultaneous returns true if a channel is configured for simultaneous output
GetOutputSimultaneous(int) (bool, error)
}
ExtendedDAC is a larger part of the interface to the AP236 from Acromag
type HTTPDAC ¶
type HTTPDAC struct {
RouteTable generichttp.RouteTable
// contains filtered or unexported fields
}
HTTPDAC is a type that allows setting up a DAC satisfying any combination of the interfaces in this package to an HTTP interface
type MultiChannelDAC ¶
type MultiChannelDAC interface {
DAC
// OutputMulti writes a sequence of voltages to a sequence of channels
OutputMulti([]int, []float64) error
// OutputMultiDN16 outputs a sequence of data numbers to a sequence of channels
OutputMultiDN16([]int, []uint16) error
}
MultiChannelDAC allows multiple channels to be written at once
type TimerDAC ¶
type TimerDAC interface {
WaveformDAC
Timer
}
TimerDAC is the union of WaveformDAC and Timer
type TriggerExport ¶
type TriggerExport interface {
SetTriggerDirection(bool) error
GetTriggerDirection() (bool, error)
}
TriggerExport describes a piece of hardware which imports or exports a trigger
type WaveformDAC ¶
type WaveformDAC interface {
ExtendedDAC
SetOperatingMode(int, string) error
GetOperatingMode(int) (string, error)
SetTriggerMode(int, string) error
GetTriggerMode(int) (string, error)
PopulateWaveform(int, []float64) error
StartWaveform() error
StopWaveform() error
}
WaveformDAC is a DAC which allows waveform playback
Source Files