# GRASS Help System

Installing a Kurta Series 3 Digitizer.

This file covers how to set up the hardware for a Kurta digitizer.

To prepare the Kurta digitizer for map development use.

There are two sets of switches on the back. The set of 8 switches should be set to this:

switches: 12345678
setting: 11000000 1 is up, 0 is down

The second set of switches controls the baud rate and should be this:

switches: 1234
setting: 1000 1 is up, 0 is down

The cabling between the digitizer and the computer differ for different computers. Some known cable configurations that have worked:

AT&T 3B2:

3B2 Kurta

    	---        -----

## 2 3

## 3 2

## 4 5

## 5 4

## 6 20

## 7 7

## 20 6

2 and 3 switched. 4 and 5 switched. 7 straight thru.
6 and 20 switched.

## MASSCOMP:

MASS Kurta

    	----       -----

## 2 2

## 3 3

## 5 5

## 7 7

A straight thru ribbon cable will work on the Masscomp or just the pins listed above 2, 3, 5, 7.

If the v.digit program isn't working, make sure that the tty the digitizer is on has the getty off, the tty permissions are set to 'crw-rw-rw', the 'digitcap' file is correct for your system configuration, and the switch settings on the digitizer are correct. There are some diagnostic programs under $GISBASE/src/mapdev/digitizers/kurta/Diagnostics. Read the README file in the Diagnostics directory for specific information on the programs. If none of the programs work, then there is something wrong with either the cabling or the digitizer.

    ---------------------------------------------------------------------

Additional Documentation for Kurta Digitizers:

KURTA Corporation 4610 South 35th Street Phoenix, Arizona 85040 ph. (602) 276 - 5533

Documentation for Kurta series III. 16 button cursor.

'v.digit' is using the Kurta output binary format 2. Cursor buttons are used in this device driver.

Switch settings of kurta digitizer for 'v.digit'.
These are for series III.
PROGRAM switches: 1100 0000 (1 - on/up, 0 - off/down)
Mode/Baud: 1000

These settings give remote (request), 1000 PPI, english, and binary
output format 2, at 9600 baud.

Data Output Resolution: pg. 9

English Metric

(low) 'E': 200 PPI 203.2 PPI (80 points per centimeter)
(high) 'F': 1000 PPI 1016 PPI (400 points per centimeter)

default is 1000 PPI.

Request Output:

When in request mode (which v.digit runs), prompt the digitizer for
output by sending it a "2" .

Output Rate: pg. 11

Max of 50 X Y pairs per second at 9600 baud.
Max of 100 X Y pairs per second at 19.2K baud.

Origin Selection: pg. 11

Origin will be in the lower left corner and is fixed in this position
unless a set origin control input character is sent to the digitizer.

Accuracy (+ 1 LSB): pg. 14

Standard is +/- .01 inch with cursor.

Notes: Kurta does not remember any programmable commands after a reset or the power is turned off.

ASCII output bytes are multiplied by a power of 10. Binary output is multiplied by power of 2.

X and Y are same resolution.

Status is the number of the button pushed on the cursor, unless the digitizer is in remote (request) mode; then its always 0.

Problems:

Can only get output from Kurta for format 8 in remote (request) mode.

Format 7 is sporadic in point mode. Meaning that the characters read have no pattern.

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README file:

There are diagnostic programs for the Kurta in the sub-directory Diagnostics.

The code in the B directory is for the ucb universe before it was rewritten for the ATT universe.

The file DOC contains documentation for the Kurta digitizer (for programmers who wish to expand the capabilities of the device driver).

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Automatically created on: Wed Oct 12 14:08:41 2005