Embedded

HP calculator is back
Hello Folks, Usually I discard all the ad pages but this morning something caught my eye and almost left me in disbelief: Ye olde HP12C is back. 25th anniversary edition and on sale for under $80. Ok, it's the financial version and not the 11C. But still, amazing. Almost as if GM would have brought the EV-1 ... 22 Sep 2006 10:10

LPC3180
Anyody knows where I can buy an LPC3180 development board? I also need embedded linux for it with USB host and HID support, also I need the GNU C++ compiler for it that supports the co-processor built into the LPC3180. I been looking for weeks cant find none of those. I keep reading everywhere on the net tha... 7 Oct 2006 20:46

wiegand protocol
Hey evryOne! How about wiegand protocol? Did some search with my web archive engine and there is lot of info available out there;-) But I could not understand how a MCU and RS232 can communicate over this protocol? I mean that there are tow data lines representing '0' and '1' in wiegand, where... 13 Sep 2006 12:41

SPI Bus Specification
I searched this group and could not find much on an actual spec for the SPI bus. I know that this bus is very loose. One of my coworkers refers to it as a non-standard standard. But I will be doing some strange things to a couple of SPI bus interfaces to pass them through a cable using fewer pins than otherwise ... 9 Sep 2006 13:43

DTMF decoder
Hi everyone, I am designing a dtmf decoder using the Goertzel algoritm, the problem is that I have +/-5% error on my sampling rate timing. Does anyone know if this is going to be a problem when calculating the results? Thanks in advance ivan ... 8 Sep 2006 11:00

SD Card FAT support issues (dosfs, fatfs,fatlib)
OK, firstly I should say that I'm aware there has been recent discussion of embedded FAT here. I have looked at Lewin Edwards' DOSFS 1.01, FatFS R0.02a and Sham's Fatlib v2.0. I have an ARM7 based instrument that already is in production but would like to a support for external memory cards to store measurement d... 18 Sep 2006 05:10

Ethernet converter RTL8019AS
Hello friends, I m working as a R & D embedded Engineer. I would like to know how ethernet converter RTL8019AS actually works... If possible please send me detail links... My current application uses RTL8019AS externally and now we are planning to design it on board with my present 8 bit controller.. Thanks... 5 Sep 2006 14:46

slow response of DS1307
Hi all I am interfacing the DS1307 chip with AT89c51 and i have a problem in reading RTC registers.While reading the seconds register, it increments after every 4 seconds.Since i am not using the battery backup, i have grounded the corresponding pins (VBat),Could anyone of you suggest me how to overcome this pr... 5 Sep 2006 10:59

ARM Eval board "Mate" to a PDA !!!
www.littlechips.com has a $300 Eval board using the PDA CPU ARM / Samsung 2410 ( aka 920T) 256BGA !! Samsung wanted $1000 a year ago ! -------------------------------------------- This board has all h/w needed to upgrade . 2.5" HDD (IDE)/ CD-ROM support USB A/B cnntr with Host/Dev ( a... 3 Sep 2006 01:13

Luminary Micro
I have been watching Luminary the last couple of months and I am impressed with how they have brought out a number of chips using the new Cortex M3 ARM core. The chips have some nice features, such as executing at the full 50 MHz from flash and being available in the small 48 pin QFP. They offer up to 64 KB of Fl... 10 Sep 2006 13:29