'this file sends commands to the serial port
'for testing the DDS5m module
' This example sweeps over a given input range
CLS
LOCATE 1, 1
'
' open port for communications, disable hardware control lines.
OPEN "com2:9600,n,8,1,cd0,cs0,ds0,op0,rs" FOR RANDOM AS #1
'
clock# = 0
INPUT "enter initial frequency (in MHz): ", freq1#
INPUT "enter final frequency (in MHz): ", freq2#
INPUT "enter number of steps: ", steps#

stepsize# = (freq2# - freq1#) / steps#

' scale all the values based upon the clock frequency
defclock# = 107.3741824#

IF clock# = 0# THEN GOTO 10

scale# = defclock# / clock#

freq1# = scale# * freq1#
freq2# = scale# * freq2#
stepsize# = scale# * stepsize#

10 PRINT #1, "e d"
LINE INPUT #1, resp$
PRINT "Response ", resp$

f# = freq1#

WHILE f# <= freq2#
    PRINT #1, "f ";
IF f# < 10 THEN PRINT #1, USING "#.#########"; f#
IF f# < 10 THEN PRINT , USING "#.#########"; f#
IF f# >= 10 THEN PRINT #1, USING "##.#########"; f#
IF f# >= 10 THEN PRINT , USING "##.#########"; f#
    LINE INPUT #1, resp$
    PRINT "Response "; resp$
'wait for 250 ms on each step
       t0 = TIMER
       WHILE TIMER - t0 < .25
       WEND
     f# = f# + stepsize#
WEND
'reset to enabled echo
PRINT #1, "e e"
PRINT "Done"
STOP