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Re: PIC or AVR
Well, lets see the AVR/PIC/8051/ARM7/TI benchmarks of a third party microcontroller manufacturer:
**broken link removed**, **broken link removed**
You can see that the 8-bit AVR is almost as powerfull as the the others' 16-bitters!
My personal choice is the 8-bit AVR, ecpecially...
The Painless Guide to Error Detection Algorithms, Part 2:
10. A Slightly Mangled Table-Driven Implementation
--------------------------------------------------
Despite the terse beauty of the line
r=0; while (len--) r = ((r << 8) | *p++) ^ t[(r >> 24) & 0xFF];
those optimizing hackers...
crctable.c crc_v3
I am sorry, but though I can download my attachment when editing my post, I cannot download it afterwards.
Anyway, here is the full document:
The Painless Guide to Error Detection Algorithms -Part 1:
A PAINLESS GUIDE TO CRC ERROR DETECTION ALGORITHMS...
Yes, almost all the AVR -exept the obsolete AT90S series- support bootloaders.
A bootloader is a special firmware algorithm you can create and load to a special program memory space of the MCU, and it can access and update all the internal memories of the chip (Flash/EEPROM/SRAM) using any...
Personally, I would certainly go with the mega series of the Atmel AVR.
For instance, ATmega644 comes on 40-PDIP package for $7.32 (at Digikey), has 64KB Flash, 4KB SRAM and 2KB EEPROM on chip, and its execution speed is up to 20 MIPS at 20 MHz.
George
04c11db7 example output
Hi,
Wikipedia has always been a good source.
Of course, there is the classic "Painless Guide to Error Detection Algorithms"
George
EDIT: Attachment re-uploaded.
Re: tiny12 lock bits
Hi Rooftop,
Since the SPIEN fuse is unprogrammed, the t12's ISP programming interface is disabled. You can only use HVSP to restore the SPIEN fuse. Erasing the chip resets the lock-bits but does not restore the fuses.
In order to re-enable the ISP programming interface...
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