What microcontroller to buy?

Try the 8052. There are lots of variants but they all share a common basic tion set architecture and instruction set. There are lots of cheap develpment kits around most of which include a free compiler/assembler for programs up to 4K bytes in size.

You could start at

Ian

Sounds like a job for MSP430.

:(

Some versions have 2 serial ports.

Some people have integrated mpsgcc with Eclipse and the jtag debugger, though I use a plain text editor and makefiles. I also tend to use serial for the loader and old- fashioned output lines and printfs to debug.

mspgcc, there are various JTAG interfaces available, or make it yourself (details readily available from mspgcc site).

Depends how quickly you need to access the data. Perhaps a serial EEPROM will do the job.

Paul Burke

If you get an AT91SAM7S128 you get USB and Mass Storage Code which uses the internal Flash as file storage.

64 Pin LQFP (QFN-64 coming)

By connecting to the PC; you can drag and drop the log data. Probably you will get about 100 kB data here. A possibility would be to add a small (SO-8) Dataflash externally on the SPI bus. This would allow between 1-64 MBit Data. One of the problems with using on chip flash for storage is that you must not write the flash while executing out of it. You will require a chip which either stops executing while programming the flash or has an additional memory area from where you can execute. The AT91SAM7S128 has 32 kB of SRAM which can be used to store both program and data. Upgrading to an AT91SAM7S256 will allow even more data and 64 kB SRAM for program and data.

The IAR C compiler is free of charge for up to 32 kB C-Code (you can link more assembly code) There is a low cost dev kit from

or you can get the Atmel one. Atmel also supplies a JTAG Emulator (SAM-ICE) at low cost.

--
Best Regards,
Ulf Samuelsson
This is intended to be my personal opinion which may,
or may not be shared by my employer Atmel Nordic AB

You have not said what you are logging ? Using CODE space for data storage is expensive, and inflexible,so use

8 pin SPI memory. After that, almost any uC with a UART will do - if you want to log analog, then select a uC that has a matching ADC. Look at Silabs ToolStick, uses their C8051F300 series, or their C8051F064DK, depending on your volumes.

-jg

PS. Please cross-post (the same posting to (a few) multiple groups) rather than multi-posting (copies of the message to multiple groups).

--
Rich Webb   Norfolk, VA

The Renesas M16C familly is having low power members with enough on chip code and data flash and all the periphals you are after. Also the other requierements are IMHO met. Use their product selector page to decide which chip out of this familly meets your requierements best.

Many distributors around the globe produce eval boards and also Renesas is producing their own low cost eval boards. They usually come along with an downlaodable debugger (KD30) and a free C compiler which is suficient for what you need.

HTH

Markus

You mentioned that the IAR C compiler is free of charge. I couldn't find any information about this on IAR's web site nor could I even find a download for just the compiler. Can you provide more information please.

Thanks Johann

skrev i meddelandet news: snipped-for-privacy@g44g2000cwa.googlegroups.com...

Yes, if you dont know what you are looking for you would have a hard time... Link to the SAM7 Kickstart kit

Check for the ARM Kickstart edition.

--
Best Regards,
Ulf Samuelsson
This is intended to be my personal opinion which may,
or may not be shared by my employer Atmel Nordic AB


> Thanks
> Johann
>

MCF5282 eval board from axman.com

*< 1w *64k ram on chip + flash *rs232, CAN Ethernet *gdb from ocdemon.com with insight tcl/tk wrapper *gcc *$149 wiggler cable for flashing microcontroller and debugging

I very much would not recommend using any 8051 variant, considering what is now available. Those are very inefficient processors that offer nothing other than their ubiquity.

The MSP suggested below is a good choice for low power apps, but runs at >

Is there a MSP430 with USB ? - plenty of 80C51 variants with USB, at

1/12/480Mbd.....

Also, you'll find SPI _and_ UART are sparse/non existant on the smaller MSP430's

-jg

First, please do not top post.

Second the 8051, despite its age, is still the most used 8 bit microcontroller. It is not inefficient - it has many bit level instructions ideal for embedded applications and the fastest variants are capable of 100 MIPS.

Ian

Whick 80c51 variant has 480Mb ??

Cypress FX2 has full 480Mbit/sec

WOW, thank you.

donald