Ecropen - VeriFone MX800 series Programmer's Manual

ecrOpen

This function opens the port and initializes it according to the I4683 variable. If the
visa_sel is non zero, the port is configured for VISA 2 processing. If port_name
is specified, then it overrides the setting in the L4683 environment variable. If
port_name is not specified, then a null terminated string ("") should be passed and
the value in the L4683 environment variable will be used. The function returns the
handle to the port. or a negative value upon error and errno set.
Prototype
short hEcr = ecrOpen(char *port_name, short visa_sel);
Return Values
Negative return values are defined as follows:
-0 I4683 environment variable NOT found.
-1 Device driver not installed
-2 L4683 environment variable NOT found.
-3 Invalid port number in L4683.
-4 Invalid port name argument.
-5 Invalid L4683 environment variable length.
-6 Invalid I4683 slot specified or not initialized.
-7 Visa protocol NOT started.
-8 Initialization failed of Polling semaphore.
D
erno = -EINVAL
errno = -ENXIO
erno = -EINVAL
erno = -EINVAL
erno = -EINVAL
erno = -EINVAL
erno = -EBADSLT
erno = -EPROTO
erno = -EPERM
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ERIES ROGRAMMERS
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EVICE RIVERS
ecrOpen
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