8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes : Forum / topic

8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes : Forum / topic http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2008 Rickey's World contact@nospam.com (Ajay Bhargav) contact@nospam.com (Ajay Bhargav) Thu, 08 Jan 2009 20:10:10 -0800 Thu, 08 Jan 2009 20:10:10 -0800 http://backend.userland.com/rss e107 (http://e107.org) 60 Search Search 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes query http://www.8051projects.net/search.php x10 home automation http://www.8051projects.net/forum-t846.html i have the code to run the x10 protocol for PIC16F877
I am having a hard time to change the code to run on
p89c51rd2 since they use totally different memory organization. is there any one one who can help me?
i have attached the code for the PIC.
Do you have any thing that can help me , a book on the 80c51 mcu family etc.....

1179627400_1142_FT0_an236.zip]]> Sat, 19 May 2007 19:16:40 -0700 http://www.8051projects.net/forum-t846.html Re: x10 home automation http://www.8051projects.net/forum-t846.html well i think you can help yourself in better way

before changing that code you must understand what X10 protocol is and how it works. for that i have few links for you. please go through them, they are very useful.

http://en.wikipedia.org/wiki/X10_(industry_standard)
http://www.x10.com/technology1.htm

please go through them. will be helpful for you.]]> contact@nospam.com (Ajay Bhargav) Sun, 20 May 2007 13:13:18 -0700 http://www.8051projects.net/forum-t846.html Re: x10 home automation http://www.8051projects.net/forum-t846.html i know the x10 protocol very well. i have gone through those pages that u posted. If you Know the P89C51RD2 mcu very well do you think that the relocatable module is possible? Do the 'udata' and 'res' directives work as in the pics? is there a concept of linker script in the 80c51 family?
]]> contact@nospam.com (Ajay Bhargav) Sun, 20 May 2007 13:52:22 -0700 http://www.8051projects.net/forum-t846.html Re: x10 home automation http://www.8051projects.net/forum-t846.html also.. you can make use of linker script. there are many things you can do with keil.]]> contact@nospam.com (Ajay Bhargav) Sun, 20 May 2007 14:28:47 -0700 http://www.8051projects.net/forum-t846.html Re: x10 home automation http://www.8051projects.net/forum-t846.html The 8051 Microcontroller
by - I. Scott MacKenzie or
The 8051 Microcontroller
by - James W. Stewart]]> contact@nospam.com (Ajay Bhargav) Sun, 20 May 2007 16:05:34 -0700 http://www.8051projects.net/forum-t846.html Re: x10 home automation http://www.8051projects.net/forum-t846.html 8051
i dont think the book are asking is there but there is another book, C and 8051 its a good book. try that and if you want any book then see the request a book forum.]]> contact@nospam.com (Ajay Bhargav) Sun, 20 May 2007 22:11:13 -0700 http://www.8051projects.net/forum-t846.html Re: x10 home automation http://www.8051projects.net/forum-t846.html contact@nospam.com (Ajay Bhargav) Mon, 04 Jun 2007 02:31:59 -0700 http://www.8051projects.net/forum-t846.html Re: x10 home automation http://www.8051projects.net/forum-t846.html

PC:
Program counter (PC) is a 13-bit register that contains the address of the instruction being executed. It is physically carried out as a combination of a 5-bit register PCLATH for the five higher bits of the address, and the 8-bit register PCL for the lower 8 bits of the address.

I dont know how much you understood from that... but i saw sample programs etc.. which shows that, PCL and PCLATH is used for making lookup tables, as PCL is directly associated with the program counter and in 8051 there is no direct access to PC.
also.. these two registers are used for making jumps etc.. like jump to some address, but usually as i said PCL and PCLATH is used for look up tables. coz normal jumps in PIC i.e. goto and call etc. are limited to some limit of memory (sorry donno much about this)
but in 8051 we can directly jump to the label with ljmp. Please try to read more in PIC books if you can get some information and do share it with me.
and regarding your use of register.. i think you can try using DPTR, labels and jumps hope you get desired result.]]> contact@nospam.com (Ajay Bhargav) Mon, 04 Jun 2007 04:01:15 -0700 http://www.8051projects.net/forum-t846.html