Sensoray 2253 Windows - Manual (Page 43)

int gpioId,
int *value,
S2253P_MODE mode);
This function reads a gpio. This requires two transactions, an “update”
request, and a “read” reply. The transactions may be performed
independently, or together. Any read transaction will cause this function to
block until the reply is received.
devid
device id in the system (use 0 with a single board installed).
gpioId
gpio identifier 0 or 1.
value
pointer to variable receiving the value: 0 or 1 (active low)
mode
S2253P_MODE_UPDATE: send gpio update transaction
S2253P_MODE_READ: read gpio reply
S2253P_MODE_UPDATE_READ: both
S2253P_EnableXIOAsync
MID2253_API int __stdcall S2253P_EnableEncoderAsync (
int devid,
int xioId,
int enable);
This function controls enabling asynchronous XIO updates internally on the
board. When asynchronous mode is enabled, XIO reads do not require update
first, and XIO triggers may be used to pause streaming.
devid
device id in the system (use 0 with a single board installed).
xioId
xio identifier 0 to 3.
enable
0=disabled, 1=enable asynchronous updates
S2253P_ReadXIO
MID2253_API int __stdcall S2253P_ReadXIO (
int devid,
int xioId,
int *value,
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