OPPSUMMERING
loadrt streamer depth=depth1[,depth2…] cfg=string1[,string2…]
BESKRIVELSE
streamer and halstreamer(1) are used together to stream data from a file into the HAL in real time. streamer is a realtime HAL component that exports HAL pins and creates a FIFO in shared memory. hal_streamer is a non-realtime program that copies data from stdin into the FIFO, so that streamer can write it to the HAL pins.
VALGMULIGHETER
- depth=depth1[,depth2…]
-
Sets the depth of the FIFO that the realtime streamer creates to receive data from the non-realtime hal-streamer. Multiple values of depth (separated by commas) can be specified if you need more than one FIFO (for example if you want to stream data to two different realtime threads).
- cfg=string1[,string2…]
-
Defines the set of HAL pins that streamer exports and later writes data to. One string must be supplied for each FIFO, separated by commas. streamer exports one pin for each character in string. Legal characters are:
-
F, f (float pin)
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B, b (bit pin)
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S, s (s32 pin)
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U, u (u32 pin)
-
FUNKSJONER
- streamer.N
-
One function is created per FIFO, numbered from zero.
PINNER
- streamer.N.pin.M output
-
Data from column M of the data in FIFO N appears on this pin. The pin type depends on the config string.
- streamer.N.curr-depth s32 output
-
Current number of samples in the FIFO. When this reaches zero, new data will no longer be written to the pins.
- streamer.N.empty bit output
-
TRUE when the FIFO N is empty, FALSE when valid data is available.
- streamer.N.enable bit input
-
When TRUE, data from FIFO N is written to the HAL pins. When false, no data is transferred. Defaults to TRUE.
- streamer.N.underruns s32 read/write
-
The number of times that sampler has tried to write data to the HAL pins but found no fresh data in the FIFO. It increments whenever empty is true, and can be reset by the setp command.
- streamer.N.*clock bit input
-
Clock for data as specified by the clock-mode pin.
- streamer.N.*clock-mode s32 input
-
Defines behavior of clock pin:
-
0 (default) free run at every iteration
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1 clock on falling edge of clock pin
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2 clock on rising edge of clock pin
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3 clock on any edge of clock pin
-
SE OGSÅ
halstreamer(1), sampler(9), halsampler(1)
FEIL
Should an enable HAL pin be added, to allow streaming to be turned on and off?
FORFATTER
Opprinnelig versjon av John Kasunich, som del av LinuxCNC-prosjektet. Forbedringer av flere andre medlemmer av LinuxCNC-utviklingsgruppen.
FEILRAPPORTERING
Report bugs at https://github.com/LinuxCNC/linuxcnc/issues.
ÅNDSVERKSRETTIGHETER
Copyright © 2006 John Kasunich.
Dette er fri programvare. Se kilden forbruksvilkår. Det er INGEN garanti, ikke engang når det gjelder SALGBARHET eller EGNETNET FOR ET BESTEMT FORMÅL.