SPI_connect
SPI_connect
SPI_connect, SPI_connect_ext - connect a C function to the SPI manager
Synopsis
int SPI_connect(void)
int SPI_connect_ext(int options)
Description
SPI_connect
opens a connection from a
C function invocation to the SPI manager. You must call this
function if you want to execute commands through SPI. Some utility
SPI functions can be called from unconnected C functions.
SPI_connect_ext
does the same but has an argument that
allows passing option flags. Currently, the following option values are
available:
-
SPI_OPT_NONATOMIC -
Sets the SPI connection to be nonatomic , which means that transaction control calls
SPI_commit,SPI_rollback, andSPI_start_transactionare allowed. Otherwise, calling these functions will result in an immediate error.
SPI_connect()
is equivalent to
SPI_connect_ext(0)
.
Return Value
-
SPI_OK_CONNECT -
on success
-
SPI_ERROR_CONNECT -
on error