A working MEMKey program for BS2P40???

$WMc%

Hello All

····· I'm looking for a simple little program that will interface the MEMKey to the BSp????


· ___________Thanks_________$WMc%___________

Beau Schwabe

The code here within the PDF document should also work with the BS2P40 ... see page 11

www.parallax.com/Portals/0/Downloads/docs/prod/datast/memkey.pdf
www.parallax.com/Store/Sensors/CustomKits/tabid/134/txtSearch/MEMkEY/List/1/ProductID/192/Default.aspx?SortField=ProductName%2cProductName

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

$WMc%

Mr.Schwabe

·I thank you for Your reply!!!...I am useing the programs used in the links You included.They work great w/ the BS2...Thier seems to be a "timing" issue w/ the BS2p...I can't seem to pin point.?...It seems to be in the serial protocal. I looked in the Manule (pg 396~ to 420~) the chart shows that ( 1021 ) should be the CON value for the serial protocal for the BS2p but It doesn't work...I did the math and came up w/ (1021).When the MATH doesn't work the Formula must be wrong!?!?......."(396) works perfict for the BS2"....(1021) should work for the BS2p But it doesn't....AN-302 is the program I mod. for the BS2p..All I changed was the "CON" statment to "1021" from "396"......What am I missing???????????????.........

I'll take any help,,I'm @ My wits end_______________%WMc$____________

Post Edited ($WMc%) : 10/25/2008 4:51:55 AM GMT

Beau Schwabe

$WMc%,

Can you post the exact code that you are using?

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

$WMc%

Mr. Schwabe

·· Here is the code I Mod. from AN-302



____Thanks for the help________$WMc%__________________


Post Edited ($WMc%) : 10/26/2008 5:53:06 PM GMT

kelvin james

I would highly doubt you had this working with a bs2, if so, lets see the code. For one thing, the memkey is communicating in hex, so if you are looking for a keypress of decimal 00, take a quess of what the result is. You should be able to figure it out from here.

$WMc%

Mr. James

I have used this porgram w/ the BS2 and it works great. The program I used is AN-302 for the BS2....This is the genearic Program from MEMKey...I thank You for Your post....My Problem is w/ the BS2P!!!!!!!!!!!!!!......I don't know if the problem is in timing or compiler directive?I have other members of this FORUM asking Me for help on this topic w/ the BS2P....We would all like a fix to the problem..

_____________________$WMc%____________________Think Posative++++++++++++

kelvin james

I have used the memkey with a bsp24 with no problem using the 3 wire setup. I have not tried the one wire approach. All that i know is the baud rate of 1021 works. From my previous post, the key read values are sent in hex, so either you read them that way, or use a dec formatter with serin.

I use the initialization code to set the parameters first, some of your previous code may have changed the default settings. I would try going back to the 3 wire approach with the initialization, you will have to change all the 396 to 1021, and see if that works.

If not, you have a hardware problem somewhere, either wiring or with the mcu itself. If i have some time tomorrow, i will try the one wire thing to see if it works.

$WMc%

Mr. James

· I Thank You for Your reply.I have cleaned up the Progam to make it a lil. clearer.This program works great w/ the BS2 and (Baud CON· 396),But it doesn't work w/ the BS2p40 and (1021)??? :I get values that are out of range like 55,57,49.....I see the argument You have·w/ "DEC2" and I'm not sure why this works w/ BS2 but it does. One otherthing I have done is switch to Editor v2.4 from v2.2...What Editor Ver. are You useing????



_______________$WMc%__________________Thanks Again____

$WMc%

Hello again

········ Mr. James I tried the 3 wire setup and used AN-300 w/ a Baud value of 396 and the BS2. This worked w/ the BS2...I shut down the power removed the BS2 and installed the BS2p40/changed the Baud to 1021 and the Stamp directive·; downloaded to the BS2p40 and nothing. All I get is the blank blue " debug " screen·of nothingness...I have used this BS2p40 w/ a serial LCD @ 19.2kBaud and it·was pretty fast,So I still don't think this is faulty hardware. I'm useing the PRO.DEV.Board for these test.



____________________$WMc%________________??????____

kelvin james

I don't have a dev board, but the manual states that there is a pin conflict if you try and use a bs2p40 with the sx28 in its socket at the same time. Maybe this is the problem?


I suppose you realize that the bsp40 and the 24 versions are not pin compatible, so a wiring change would be required also. It looks if you just used P0 to P7 you would be okay to do a quick switch.

Post Edited (kelvin james) : 10/28/2008 4:28:16 PM GMT

$WMc%

Hello All

··· The First thing I have to say is I AM NOT smarter than a 5th grader.Sure enough I was on the wrong·I/O pin X15 and not P15.Whats even worse is I added the AUX. socket to the Pro.Dev.Board about 6 months ago so I could get to all 32 I/O pins w/ the BS2P40.When Mr James pointed out the too where NOT pin for pin compa. it hit Me like a ton of Bricks. I don't know where My heads been the last couple of weeks But it was dark and smelled funny.....I have attch. A working code for the Pro.Dev.Board w/ the ser. pin on PIN 0, hopfully this will save some confusion.

______ManyThanks_______________________$WMc%___________________out________

·· Heres the pinout everybodys asked for...It's for use w/ the Matrix keypad on A OneWireBus..
·· Don't forget the resize ICON @ the lower rigth of the screen,to resize a jpeg.....

Post Edited ($WMc%) : 11/1/2008 9:19:43 PM GMT