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vineesh.1
Joined: 28 May 2006
Posts: 8
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 11 Oct 2006 14:56 Help: Deciding hardware 4 project |
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I intend to make a project on an embedded system.
I shall be using a thermal printer, handheld bar code scanners with USB interface and a basic kaypad. I need help in deciding wat system do I use as a base. I cud do the proj using a comp, but the system needs to be compact. So shud I go in for a cpld or an fpga or sm microcontroller?
I'd be grateful to u for ur help.
Thnx in advance.
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lambtron
Joined: 02 Nov 2005
Posts: 256
Helped: 26
Location: Portland, OR
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11 Oct 2006 22:31 Re: Help: Deciding hardware 4 project |
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| I'd use a microcontroller that has plenty of i/o for the peripheral devices you will connect to. This will cost less than fpga and is easier to develop.
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mansoorahmed
Joined: 25 Mar 2006
Posts: 47
Location: Pakistan
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12 Oct 2006 5:40 Re: Help: Deciding hardware 4 project |
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| Use FPGA
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12 Oct 2006 5:40 Ads |
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ivar4ever
Joined: 12 Jun 2006
Posts: 309
Helped: 72
Location: India
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12 Oct 2006 5:52 Re: Help: Deciding hardware 4 project |
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| micorcontroller wud be better
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dipal_z
Joined: 21 Apr 2005
Posts: 292
Helped: 32
Location: India
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12 Oct 2006 8:23 Help: Deciding hardware 4 project |
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| If your objective is to learn, why not combine both microcontroller and FPGA?
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vineesh.1
Joined: 28 May 2006
Posts: 8
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12 Oct 2006 12:21 Re: Help: Deciding hardware 4 project |
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Thnx a lot 4 the reply frnds, but my confusion remains at the same pt where it started.
@dipal_z : I intend to make a project wich is a wrking prototype for demonstration, so it is not jus gonna have learning as an objective though it is certainly an important aim.
I have experience in wrking wid sm microcontrollers, but none had as many i/o ports as we need.
@lambtron: If possible cud u plz suggest me any micro-controller wid many i/o ports.
I need help not only wid jus the choice b/w micro-controllers, FPGA, comp or a CPLD but plz also help me by giving me a name/type of the choice too.
Thnq for the responses and luking 4wrd to sm more replies.
Thnx a lot in advance.
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lambtron
Joined: 02 Nov 2005
Posts: 256
Helped: 26
Location: Portland, OR
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12 Oct 2006 14:07 Re: Help: Deciding hardware 4 project |
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You might use something like Freecell's MCF52235 Coldfire microcontroller (approx $9 USD). This has three uarts, some parallel i/o, spi, plenty of internal ram and flash, plus ethernet mac/phy if you want networking capability either now or later.
If there isn't enough parallel i/o you can add a Lattice LC4064 (approx $3 USD) and program it to implement an spi-to-digital-i/o interface. This can be quickly developed and will give you up to 71 digital i/o's with a simple 3-wire connection to the microcontroller.
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vineesh.1
Joined: 28 May 2006
Posts: 8
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13 Oct 2006 9:16 Re: Help: Deciding hardware 4 project |
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Thnx a million Lambtron, but one last ques tat I have is abt how to port USB devices onto the MCF52235. Hv downloaded the data sheet 4 MCF52235 Coldfire. I guess it wud more than suffice , but the USB core is wat I am having a lil prob wid.
Thnx once again 4 the help, but still need a lil bit more.
Added after 8 minutes:
Also can smone plz suggest sm suppliers of thermal printers for embedded design (coz I need to do bar code printing) and ne barcode reader wich can be used with micro-controllers.
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lambtron
Joined: 02 Nov 2005
Posts: 256
Helped: 26
Location: Portland, OR
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13 Oct 2006 14:15 Re: Help: Deciding hardware 4 project |
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Have a look at Cypress Semiconductor's EZ USB devices. These are not quite as "well endowed" as the Coldfire parts, but they have built-in usb and lots of reference designs and software support. In a pinch you could use this with a MCF5223x.
Most any barcode scanner will work. Just choose one that has a RS232 interface (most scanners are available with RS232) and connect it to the microcontroller's serial interface (with appropriate RS232 transceiver). Check out Symbol Technologies.
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vineesh.1
Joined: 28 May 2006
Posts: 8
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13 Oct 2006 15:38 Re: Help: Deciding hardware 4 project |
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| Thnx once again lambtron. Wud get bak to the forum wid my other queries.
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vineesh.1
Joined: 28 May 2006
Posts: 8
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17 Oct 2006 16:30 Re: Help: Deciding hardware 4 project |
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The microcontroller is not in prodn in India and Freescale doesnt offer them as samples. Can u suggest any other chip with the Crypto Accelerator Unit as tat wud be very useful 4 my proj?? I cudnt find ne with Freescale!!
Even widout the CAU wud do, but smthng close to MCF52235 wud do!!
Thnx in advance!!
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