Post by thread:[SX] Storing Info in the SX

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:I need a way to store setting in the SX28. I can create Data Statements to create the Default, but I want to be able to configure the setup using the serial connection I have. I am Sending "!CMD" then I will send a Command number and a setting and I want to store it in the SX28 even if power is removed I want it to stay.

Can someone help...Again.. :) Regards, Eric ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:You're going to have to attach an external EEPROM. SX/B has I2C functions that make using them pretty straightforward.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Eric, The flash memory on the SX doesn't work like EEPROM. It requires a high voltage to program (that the SX-Key/SX-Blitz provides). There is no way the SX can change it own flash memory. Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:OK... Thanks...Which EEPROM works well with the SX-28.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, mgreen wrote:Any I2C EEPROM should do. Whatever is large enough for the amount of data you need to store. The part numbers mostly start with 24LC, then a number like 16, 32, 64, 128, 256, 512, 1024. This number is the number of bits in the device. Divide by 8 to get the number of bytes. The largest current devices are 128K bytes. The theoretical maximum using the current addressing scheme (8 device addresses, each with a two byte address) is 512K bytes.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:If you look in the help file under any of the I2C commands there's a circuit and demo code for the 24LC16, a 2K device that you can get from Parallax.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:OK thanks... I hope the 24LC16 comes in a SMT design.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Eric, You don't say how many bytes you want to store, but I have a bunch of 24C00 EEPROMs. They only hold 16 bytes though. I'll mail you some if you can use them.

Bean ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m176815 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:Bean, Are you serious? Yeah for this project I'm only gonna need a few bytes. I'll PM you a mailing Address.

Regards, Eric ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m176822 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Eric, How many do you need ? You don't need to pay me anything for them, I'll just pop them in an envelope. Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:Bean, I don't feel right about taking them... How about 5 or 10... They seem like they are going to be handy. Thanks for this, If I need more how much are you asking?

Eric ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m176843 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Eric, I got a reel of several thousand from Ebay for cheap. I'll send you a bunch, the postage stamp would cost more than 10 pcs ;) Bean ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m176860 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:OK thanks... :) I'll look for them.

Eric ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m176878 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Casson wrote:Most likely this is a dumb question. Can this sort of external memory allow the SX28 to run a program longer than can fit in the existing memory ? Henry.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, PJ Allen wrote:Can this sort of external memory allow the SX28 to run a program longer than can fit in the existing memory? No, but if your program involves using DATA/WDATA then that all can be stored in an external memory leaving more EE/Flash available.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:Bean, Do you have sample code that works with these and the SX-28?

Regards, Eric ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m177389 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, robotworkshop wrote:Hello Eric, Have you seen the EEPROM sample code in SX/B on the following post: http://forums.parallax.com/forums/default.aspx?f=7&m=172860&p=1&ord=a It may help you get the external EEPROM up and running a bit faster. You should be able to prototype and test with a DIP version of the chip and then go to a surface mount part for your final design.

Best Regards, Robert ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m177424 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Details can be found in here: http://www.robotstore.com/download/276568catalyst.pdf The help file code can be adapted easily -- it looks like the only change is that the 24C00 just uses one address bytes versus two in the 24LC16B.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Eric, They are pretty standard. Here is the datasheet http://ww1.microchip.com/downloads/en/DeviceDoc/21178F.pdf They are 24LC00T/OT devices and I sent you 50 or so. For a write you do: START SEND $A0 SEND addr ' 0 to 15 SEND data ' 0 to 255 STOP For a read you do: START SEND $A0 SEND addr ' 0 to 15 START SEND $A1 READ bytevar STOP Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:Thanks all... It was a little odd in reading an Address... Thanks for clearing that up. Bean... Thanks for everything.

Eric ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=176744#m177432 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, egprentice wrote:Bean, I'm wondering if I sent you some stamps to cover postage, would you be willing to send me some of those 24LC00T/OT devices? If so, send me an email to (egp at egp dot net) with your snail mail address, and I'll send you some stamps and my snail mail address.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Send me a private message with your mailing address. Just consider it a early birthday present ;) Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, egprentice wrote:Thanks, Bean, that's very generous of you. I sent you a separate email with my snail mail address.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:OK I believe that I jumped too Quick... I laid out my circuit and etch a board with the SX and a 24C00 Eeprom... I'm, guessing it's not working because I don't have Pull up resistors on the SCL and SDA line... Would this be a good assumption?

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Yes, I2C requires pull-ups (usually 4.7K) on the SCL and SCA lines. The idea behind I2C is that the transmitting device pulls the line low, the pull-up handles the high. That way if two devices transmit at the same time there is no electrical problem (as there would be if the transmitter drove the line high).

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:That's what I thought... Darn!!! All of those darn holes drilled. Hahahaha Thanks for confirming that.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Eric, Depending on many factors you MIGHT get away with just enabling the internal pull-ups on the SDA and SCL pins. I don't recommend depending on it, but with some devices it does work. Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:I'm using the SX48 with one 24C00 that you sent me... I will try that. Good Idea as usual.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:I am Using a 24C00 and I have SDA Connected to RD.4 and SCL Connected to RD.5 on the SX48 I am trying to run this code. An LED will flash if the Code written to and returned from the EEProm is the same. I don't have external Pull up resistor connected only the internal. Should the Code below work? If so I'm going to have to redesign my circuit. Thanks in Advance, Eric DEVICE SX48, OSCHS2, BOR42 FREQ 4_000_000 ID "24C00" Pullup RD.4 Pullup RD.5 Sample Var Byte PROGRAM Start NOSTARTUP Start: I2CStart RD.4 I2CSend RD.4,$A0 I2CSend RD.4,0 I2CSend RD.4,128 I2CStop RD.4 Pause 50 Do I2CStart RD.4 I2CSend RD.4,$A0 I2CSend RD.4,0 I2CStart RD.4 I2CSend RD.4,$A1 I2CRecv RD.4,Sample,1 I2CStop RD.4 If Sample=128 Then Toggle RD.7 Pause 100 Endif Loop ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=2&m=176744#m179905 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Check your connections. And I think your NAK bit is set incorrectly -- on the final byte read it should be 1, not 0 as in your listing. And... it is very dangerous to embed "magic numbers" -- including pin numbers -- into your listings; HUGE bug generator. Try this version: DEVICE SX48, OSCHS2, BOR42 FREQ 4_000_000 ID "24C00" SDA PIN RD.4 SCL PIN RD.5 Led PIN RD.7 sample VAR Byte PROGRAM Start NOSTARTUP Start: PULLUP SDA PULLUP SCL Main: I2CSTART SDA I2CSEND SDA, $A0 I2CSEND SDA, 0 I2CSEND SDA, 170 I2CSTOP SDA PAUSE 10 DO sample = 0 I2CSTART SDA I2CSEND SDA, $A0 I2CSEND SDA, 0 I2CSEND SDA, $A1 I2CRECV SDA, sample, 1 I2CSTOP SDA IF sample = 170 THEN TOGGLE Led PAUSE 100 ENDIF LOOP END ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=2&m=176744#m179932 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ems1965 wrote:I am usually careful about my wiring, but I totally missed a ground jumper. Ugh! Works now...I could just slap myself silly now!!!!

Thanks Jonny ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=2&m=176744#m179941 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)