VeriFone MX800 Series - Ecropen

DEVICE DRIVERS
ecrOpen
M
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800 SERIES PROGRAMMERS GUIDE 101
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. erno = -EINVAL
-1 Device driver not installed errno = -ENXIO
-2 L4683 environment variable NOT found. erno = -EINVAL
-3 Invalid port number in L4683. erno = -EINVAL
-4 Invalid port name argument. erno = -EINVAL
-5 Invalid L4683 environment variable length. erno = -EINVAL
-6 Invalid I4683 slot specified or not initialized. erno = -EBADSLT
-7 Visa protocol NOT started. erno = -EPROTO
-8 Initialization failed of Polling semaphore. erno = -EPERM