From: <wa...@wa...> - 2007-01-04 17:56:34
|
I bought an 8051 (89C2051) development board off of ebay a couple of weeks ago, and I got burned pretty bad. The onboard 8051 has no bootloader and has no method of writing the eeprom without building a circuit just to add software! I spent the shipping time learning about the 8051 and am very intrigued. I'd like to continue playing with the chip, but I'm kind of stuck with emulators for now. Anyways, does anyone have any unused 8051-based development boards they can part with for cheap? I'd like something with at least 4k of flash, and either an ISP builtin or at least a bootloader so I can copy software. -Warren |
From: Richard E. <ed...@id...> - 2007-01-04 18:40:29
|
Hi! I'd recommend you visit 8052.com and look around, and maybe ask some questions there. Note that the "chat" forum is NOT a real-time chat environment as has become popular in recent years. One word of caution ... do NOT use SMS-style abbreviations there, but, rather take the extra few milliseconds to type out the words in your questions. In fact, read ALL the instructions at the beginning of your session before you attempt to post anything, and be sure to search thoroughly before posting what may well be a repeatedly-answered question. There are lots of opinions offerred there, including mine, and I suggest you take all of them with the proverbial "grain of salt." One relatively cheap board that gets little mention these days, is the NMIY-0031, which costs about $39.00 US. I've used this from time to time without being disappointed. Just search for NMIY-0031 on GOOGLE, and you'll find it. Read the fine print, though. This one has sockets for external memory, but will execute internal code if you "un-ground" the /EA signal, which you have to do surgically. I've been using one with a modified GAL that allows me to use a battery-backed RAM in place of a PROM. That's very convenient for many things. regards, Richard Erlacher ----- Original Message ----- From: <wa...@wa...> To: <sdc...@li...> Sent: Thursday, January 04, 2007 10:56 AM Subject: [Sdcc-user] Cheap Used Devel Board > > I bought an 8051 (89C2051) development board off of ebay a couple of weeks > ago, and I got burned pretty bad. The onboard 8051 has no bootloader and > has no method of writing the eeprom without building a circuit just to add > software! I spent the shipping time learning about the 8051 and am very > intrigued. I'd like to continue playing with the chip, but I'm kind of > stuck with emulators for now. > > Anyways, does anyone have any unused 8051-based development boards they > can part with for cheap? I'd like something with at least 4k of flash, and > either an ISP builtin or at least a bootloader so I can copy software. > > -Warren > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Sdcc-user mailing list > Sdc...@li... > https://lists.sourceforge.net/lists/listinfo/sdcc-user |
From: <wa...@wa...> - 2007-01-04 19:44:07
|
Thanks Richard! That NMIY-0031 seems like an awesome deal for a complete 8051 environment with everything. Documentation, software, programmer, monitor; the works. -Warren ----- Original Message ----- From: Richard Erlacher <ed...@id...> To: sdc...@li... Sent: Thursday, January 4, 2007 12:40:18 PM GMT-0600 US/Central Subject: Re: [Sdcc-user] Cheap Used Devel Board Hi! I'd recommend you visit 8052.com and look around, and maybe ask some questions there. Note that the "chat" forum is NOT a real-time chat environment as has become popular in recent years. One word of caution ... do NOT use SMS-style abbreviations there, but, rather take the extra few milliseconds to type out the words in your questions. In fact, read ALL the instructions at the beginning of your session before you attempt to post anything, and be sure to search thoroughly before posting what may well be a repeatedly-answered question. There are lots of opinions offerred there, including mine, and I suggest you take all of them with the proverbial "grain of salt." One relatively cheap board that gets little mention these days, is the NMIY-0031, which costs about $39.00 US. I've used this from time to time without being disappointed. Just search for NMIY-0031 on GOOGLE, and you'll find it. Read the fine print, though. This one has sockets for external memory, but will execute internal code if you "un-ground" the /EA signal, which you have to do surgically. I've been using one with a modified GAL that allows me to use a battery-backed RAM in place of a PROM. That's very convenient for many things. regards, Richard Erlacher ----- Original Message ----- From: <wa...@wa...> To: <sdc...@li...> Sent: Thursday, January 04, 2007 10:56 AM Subject: [Sdcc-user] Cheap Used Devel Board > > I bought an 8051 (89C2051) development board off of ebay a couple of weeks > ago, and I got burned pretty bad. The onboard 8051 has no bootloader and > has no method of writing the eeprom without building a circuit just to add > software! I spent the shipping time learning about the 8051 and am very > intrigued. I'd like to continue playing with the chip, but I'm kind of > stuck with emulators for now. > > Anyways, does anyone have any unused 8051-based development boards they > can part with for cheap? I'd like something with at least 4k of flash, and > either an ISP builtin or at least a bootloader so I can copy software. > > -Warren > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Sdcc-user mailing list > Sdc...@li... > https://lists.sourceforge.net/lists/listinfo/sdcc-user ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Sdcc-user mailing list Sdc...@li... https://lists.sourceforge.net/lists/listinfo/sdcc-user |
From: Richard E. <ed...@id...> - 2007-01-04 19:56:22
|
Just a minute ... what do you mean by "programmer?" This thing is EPROM based, hence, doesn't provide programming capability for your single-chipper. In fact, mine, at least, uses a PLCC-44 8031. If you replace that with a PLCC-based 805x, it will still have its /EA signal grounded, which turns it into an 8031. If you get out your XACTO knife and a pullup resistor, you can modify it to use internal program memory, but I'd read the find print before endeavoring to do any of that. As I said, I use a modified SPLD, one of two on the board, which allows me to substitute a DS1230Y for the program-memory EPROM, and use that as read-write memory. That way I can use a resident debug monitor that allows me to patch the code in the DS1230Y if that's what I want to do, or to run a trace, or set breakpoints. Their monitor doesn't allow that, since it assumes EPROM contains the code space. As I said ... read the fine print. Look at the schematic diagram. Read the configuration options in the doc files. It is a remarkably good buy, but you should go in with your eyes open. Even a mere $40 is too much to spend if you don't know what you're getting. You'll be disappointed if you don't understand what it is and can do. I find it a very useful board, but it doesn't support internal code usage without some surgical modification, AFAIK. regards, Richard Erlacher ----- Original Message ----- From: <wa...@wa...> To: <sdc...@li...> Sent: Thursday, January 04, 2007 12:44 PM Subject: Re: [Sdcc-user] Cheap Used Devel Board > Thanks Richard! > > That NMIY-0031 seems like an awesome deal for a complete 8051 environment > with everything. Documentation, software, programmer, monitor; the works. > > -Warren > > ----- Original Message ----- > From: Richard Erlacher <ed...@id...> > To: sdc...@li... > Sent: Thursday, January 4, 2007 12:40:18 PM GMT-0600 US/Central > Subject: Re: [Sdcc-user] Cheap Used Devel Board > > Hi! > > I'd recommend you visit 8052.com and look around, and maybe ask some > questions there. Note that the "chat" forum is NOT a real-time chat > environment as has become popular in recent years. One word of caution > ... > do NOT use SMS-style abbreviations there, but, rather take the extra few > milliseconds to type out the words in your questions. In fact, read ALL > the > instructions at the beginning of your session before you attempt to post > anything, and be sure to search thoroughly before posting what may well be > a > repeatedly-answered question. > > There are lots of opinions offerred there, including mine, and I suggest > you > take all of them with the proverbial "grain of salt." > > One relatively cheap board that gets little mention these days, is the > NMIY-0031, which costs about $39.00 US. I've used this from time to time > without being disappointed. Just search for NMIY-0031 on GOOGLE, and > you'll > find it. Read the fine print, though. This one has sockets for external > memory, but will execute internal code if you "un-ground" the /EA signal, > which you have to do surgically. I've been using one with a modified GAL > that allows me to use a battery-backed RAM in place of a PROM. That's > very > convenient for many things. > > regards, > > Richard Erlacher > > ----- Original Message ----- > From: <wa...@wa...> > To: <sdc...@li...> > Sent: Thursday, January 04, 2007 10:56 AM > Subject: [Sdcc-user] Cheap Used Devel Board > > >> >> I bought an 8051 (89C2051) development board off of ebay a couple of >> weeks >> ago, and I got burned pretty bad. The onboard 8051 has no bootloader and >> has no method of writing the eeprom without building a circuit just to >> add >> software! I spent the shipping time learning about the 8051 and am very >> intrigued. I'd like to continue playing with the chip, but I'm kind of >> stuck with emulators for now. >> >> Anyways, does anyone have any unused 8051-based development boards they >> can part with for cheap? I'd like something with at least 4k of flash, >> and >> either an ISP builtin or at least a bootloader so I can copy software. >> >> -Warren >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share >> your >> opinions on IT & business topics through brief surveys - and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Sdcc-user mailing list >> Sdc...@li... >> https://lists.sourceforge.net/lists/listinfo/sdcc-user > > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Sdcc-user mailing list > Sdc...@li... > https://lists.sourceforge.net/lists/listinfo/sdcc-user > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Sdcc-user mailing list > Sdc...@li... > https://lists.sourceforge.net/lists/listinfo/sdcc-user |