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Thanks for all suggestions. So how do I make sure that I eliminated the chance of microcontroller being trigger twice due to the button's behavior? Or how should I connect my button to the controller, directly to the pin or with something in between? Please advice, thanks
The button for reset is connected direct to the reset pin of the controller, the button for interrupt is connected to int0 pin. Both button allows me to toggle between a logic 1 and a logic 0.
int1 is enabled for future use, i have not written the code for that yet.
I used leds to help me...
When I run the code on the actual hardware. The controller interrupt always trigger twice when I press the interrupt trigger button once, or when I do a hardware reset. Below is the code. Please advice how I can overcome this problem, thanks.
I am using a Atmel 89S51 controller with some leds...
Re: Timer problem(solved), new interrupt problem.
Hi, sorry to trouble you, but I have got the problem sloved. Looks like the software does not handle values in formats other than hex. I changed the decimals to hex format, it assembles without problem.
Thanks for your help.
I have got another...
reads 51
Sorry about that typo error, but that is not the problem. There is no such error in my actual code. Had reconfirmed by typing over with zero. Still has the same problem, please advice.
using lcall in reads51
Hi, I am trying to assemble the following, but I keep getting error. Please help. Thanks.
#include <sfr51.inc>
ORG OOOOH
LJMP MAIN
ORG 0100H
MAIN: MOV R6,#60D
MOV TMOD,#10H
MOV R1,#100D
NEXT: MOV TH1,#B1H...
A modem is a modem, all you need is another modem that uses the same technology that your current modem uses. For example, if your current modem uses v.90, you find another modem that supports v.90 . Other than that most modems are the same.
Speed Conversion
Hi, I've got this problem that maybe someone here can help. I've got incoming data at 64Kbps and I want to reduce the speed to 9600bps. Anyone has any idea how I can do this? Thanks
Hi, I need to determined a square digital waveform's frequency. Any suggestions on how to do that?? I am thinking of using one of the i/o pins as input from and external source and determining that the frequency of the waveform on that input is 424hz. Please advice...
measurement npn transistors with multimeter
Hi,
is there anyway we can check whether a transistor is NPN or PNP using a digital multimeter?
please advice, thank you.
For those who see this thread. I have got this method that works for me. Apply some solder on the tip and wipe them off using the moist sponge. that might help.
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