diff options
| author | Guido Kiener <guido@kiener-muenchen.de> | 2018-07-18 11:45:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-21 09:22:15 +0300 |
| commit | fe78a7c637057070f20ac9460608a18d775e6349 (patch) | |
| tree | 491cf3b086372c8186c6e749dc46049a3e0be5de /include/uapi/linux/usb | |
| parent | 048c6d88a0214757926f264823829e79154fcd4f (diff) | |
| download | linux-fe78a7c637057070f20ac9460608a18d775e6349.tar.xz | |
usb: usbtmc: Add ioctl for trigger
add USBTMC488_IOCTL_TRIGGER to send TRIGGER Bulk-OUT header
according to Subclass USB488 Specification
The usbtmc trigger command is equivalent to the IEEE 488 GET (Group
Execute Trigger) action. While the "*TRG" command can be sent as
data to perform the same operation, in some situations an instrument
will be busy and unable to process the data immediately in which
case the USBTMC488_IOCTL_TRIGGER can be used to trigger the
instrument with lower latency.
Reviewed-by: Steve Bayless <steve_bayless@keysight.com>
Tested-by: Dave Penkler <dpenkler@gmail.com>
Signed-off-by: Dave Penkler <dpenkler@gmail.com>
Signed-off-by: Guido Kiener <guido.kiener@rohde-schwarz.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/linux/usb')
| -rw-r--r-- | include/uapi/linux/usb/tmc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/usb/tmc.h b/include/uapi/linux/usb/tmc.h index a89ffc33532e..c61bad7150dd 100644 --- a/include/uapi/linux/usb/tmc.h +++ b/include/uapi/linux/usb/tmc.h @@ -55,6 +55,7 @@ #define USBTMC488_IOCTL_REN_CONTROL _IOW(USBTMC_IOC_NR, 19, unsigned char) #define USBTMC488_IOCTL_GOTO_LOCAL _IO(USBTMC_IOC_NR, 20) #define USBTMC488_IOCTL_LOCAL_LOCKOUT _IO(USBTMC_IOC_NR, 21) +#define USBTMC488_IOCTL_TRIGGER _IO(USBTMC_IOC_NR, 22) /* Driver encoded usb488 capabilities */ #define USBTMC488_CAPABILITY_TRIGGER 1 |