DCM-8 Motor driver circuit

Robobuzz

Does anybody know hot to inferace the DCM-8 Motor driver circuit to a stamp. From the specs:

Serial communication with the DCM-8 is done at 9600 baud, 8 data bits, no parity and 1 stop bit (9600-8N1) for TTL seial interfaces.

Command: FF# FF= both motors forward #=(0-9) speed

Im using a stamp stack 2SX so Im using the following code but nothing works:

serStr· VAR···· Byte(3)························

Main:
· serStr(0) = "F"
· serStr(1) = "F"
· serStr(2) = "5"

START
· SEROUT 1, 16468, [noparse][[/noparse]STR serStr\3]
· GOTO START

Jon Williams

True or Inveted data? How about a link to the documentation....

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Jon Williams
Applications Engineer, Parallax

Robobuzz

The documentation is attached the explanation is on pg5 or here is a link to the suppliers manual:

http://www.hvwtech.com/resources.asp?strSearch=&Mode=anywords&rCatID=1&CurPage=1

[url=:startDownload(25)]DMC-8 User Manual (.pdf)[/url]··220KB

Jon Williams

Well, they don't seem to give any clues.· So, add this to the top of your program:

#SELECT $STAMP
· #CASE BS2, BS2E, BS2PE
··· T9600······ CON···· 84
· #CASE BS2SX, BS2P
··· T9600······ CON···· 240
· #CASE BS2PX
··· T9600······ CON···· 396
#ENDSELECT

SevenBit······· CON···· $2000
Inverted······· CON···· $4000
Open··········· CON···· $8000

Baud··········· CON···· T9600


Now you can try a test statement, something like:

· SEROUT Motor, Baud, [noparse][[/noparse]"FF9"]


That should make both motors move forward at full speed.· If it doesn't, change the Baud definition to this:

Baud··········· CON···· T9600 + Inverted

... and try again.· Do make sure that you have configured the board for TTL serial input.

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Jon Williams
Applications Engineer, Parallax