Discussion in "Project Addition or Changes" started by    wiresolder    Mar 7, 2015.
Sat Mar 07 2015, 04:37 AM
#1
Hello!

I am tinkering with a hobby project of 8051 toll plaza here:
engineersgarage.com/microcontroller/8051projects/simple-toll-plaza-rfid-interface-at89c51-circuit.

Where should I add the code to control a dc motor after the main code executes?

here's the code: http://textdump.net/read/6881/

Best Regards,
Sat Mar 07 2015, 06:06 AM
#2
You can add it anywhere inside this loop:
if(tool==0)
{
	// You can add it here...
	lcd_string("Thank you User ");
	lcd_command(0x8F);
	lcd_data(49+i);
	delay(250);
	lcd_command(0x01);
	lcd_string("Charges 10.00");
	amount[i]=amount[i]-10;
	lcd_command(0xC0);
	lcd_string("Amt left  ");
	balance=amount[i];
	lcd_display(balance);
	lcd_command(0xCD);
	lcd_string(".00");
	// or anywhere above this comment
	delay(250);
	lcd_command(0x01);
	// Rest of the code..
Sun Mar 08 2015, 11:04 AM
#3
thanks
Sun Mar 15 2015, 05:12 AM
#4
Hi!!

I am using a simple LED program to test my idea for the toll plaza

here:
http://codepaste.net/eon5o1

but i get the following error

Line 285 ATP.C(285): error C141: syntax error near 'sbit'
Line 287 ATP.C(287): error C141: syntax error near 'void'

How can I correct this?
Sun Mar 15 2015, 07:56 PM
#5
You cannot define sbit (special bit) variable inside a loop or a function. You have to do it outside or say a global variable instead.
Sun Mar 15 2015, 08:03 PM
#6
There are several other errors as well, caused by trying to 'hack' the original program.

You have repeat definitions for Led, delay() and Main().
there are probably miss placed brackets as well.

It may be better to create a fresh program for your test code.


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Sun Oct 13 2019, 07:32 AM
Aline Hutchinson
Hey there,
ExperimenterUK
Sun Oct 13 2019, 03:53 AM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 03:48 PM
Bhadra Sajikumar
i am doing a countdown timer with 8051 for my project, unfortunately our professor had to take a leave of absence before he could teach us most of it.. can someone explain the .asm code of it for me?
Mon Sep 23 2019, 01:07 PM
Nathaniel
I am doing a project for my schools wireless security system with cameras,sensors and spot lights using 8051 micro controller, could you help me out with the design and its source code.
Thu Sep 19 2019, 02:18 AM
Caryn Kover
Thank you for your time,
ExperimenterUK
Tue Aug 06 2019, 12:39 AM
@Ismail ..post in forum, give details
Mon Aug 05 2019, 10:03 PM
Ismail balghmi
Hello. Please I won't download
ExperimenterUK
Wed Jul 24 2019, 06:17 AM
@BUSTER123 Please post in the forum
Tue Jul 23 2019, 11:43 PM
BUSTER123
hello! newbie here. i am kind of a guy who hates using ready - made existing libraries, so this helped a lot as i was trying to control and write to a character lcd display. however, i can't figure out how to set the cursor position. for example, i want to set it to the 5th column in the first row, so position 5. so according to the table, i am sending 10000101 on the 8 data lines of the lcd (register select pulled low). the cursor does not move there however. and i cant move the cursor left or right too. is it something wrong that i am doing? thank you.
ExperimenterUK
Fri Jul 12 2019, 01:25 AM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html

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