The "8051" is a (still) very popular chip in the Intel MCS-51 micro controller series.
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1answer
19 views
Connect 8051 serial port to multiple 8051s
I want to design a project in which one supervisor 8051 communicates with four other 8051s. I'd like the students to implement this project with some server-client view. That means that the TX port of ...
0
votes
1answer
18 views
wake up 8052 using external interupt : problems
Heres the procedure I followed
I set an edge triggered external interrupt.
SET IT0
SETB EX0
SETB EA
Then I set the PCON
...
0
votes
1answer
273 views
8051 Serial Communication
I am doing a project in which i have to serially communicate data from 8051 Micro-controller to PC. The problem is that when i transmit the data from 8051 and receive it over the Putty terminal it ...
-4
votes
0answers
39 views
I need an 8031 microcontroller programming for ADC0831 [closed]
I have been doing an Project on onload tap changers, And I am currently facing the issue of not getting digital signal from my 0831ADC , so as to feed to the Microcontroller(8051).
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1answer
56 views
Connecting the RESET pin of AT8051
How should I connect the RESET pin in a microcontroller (AT8051), and why in that particular way?
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2answers
82 views
8051 serial programmer issue
I am trying to implement this, but there are a few problems I am facing..
Should I connect PIN 5 of DB9 to Earth ground or the negative pin of the source.
When the serial Rx and Tx cables are ...
1
vote
2answers
60 views
Function called in ISR and Overlay Directive -Keil / 8051 core
My C code has an ISR, where a decision has to be made to execute a particular function "A". Now I know that its not good to run a function in an ISR. But in this case of my application, I do not see ...
2
votes
1answer
57 views
Fail to verify if watch dog timer works properly
I wrote a simple watch dog timer program. First I light up a LED, and I want to see if watch dog timer will reset the chip and the LED would be turned off(I didn't feed the watch dog).
...
2
votes
2answers
97 views
How to reduce Timer error of Atmel 89S51 microchip?
I wrote a simple code counting 30 seconds using Timer 0 (Mode 0, it's 13-bit counter) of Atmel 89S51, and I used Proteus to simulate. After 30 seconds the LED light should be turned on.
I found that ...
2
votes
1answer
91 views
Writing parameters into Code memory at Run time during Initializations - 8051
I need to make this possibly. I am using keil IDE and the AT89c51RD2 MCU.
At initialization, a function will be called to derive about 1500bytes. I want to write this byte to code memory (byte by ...
2
votes
1answer
176 views
Pressure/barometric sensor for coke can stirling engine
I'm working with a friend to provide instrumentation for a coke-can Stirling engine he's building (the kind you can see on Youtube).
As part of this, we'd like to measure revolutions per second of ...
4
votes
1answer
211 views
What is with the popularity of the 8051 Core?
I keep seeing the old 8051 architecture around a lot. But I can't see why people would want to use this old architecture in their products when there seem better alternatives around, such as ARM ...
3
votes
1answer
201 views
Is an ADC always necessary between 8051 and zero crossing detector?
I am making a SCR(Thyristor) trigger by using 8051 microcontroller.
I have a here is a zero cross detecting (ZCD) circuit which detects the zero points and this is conveyed to the 8051 which will do ...
7
votes
4answers
278 views
Can individual pins of different port of a microcontroller be mapped to a register and their values be changed when changing the register value?
Q: Can individual pins of different port of a micro-controller be mapped to a register and their values be changed when changing the register value?
Scenario: I have used up some pins from each ...
1
vote
2answers
221 views
Converting an ASCII string to bit stream
I am doing a project in which I am getting data from some switches and push buttons on the pins of 8051 uC. Now I have to transmit this data on the port pins serially to the PC.
At the PC end, I am ...
2
votes
1answer
468 views
How to communicate between 8051 microcontroller and PC
I am working on a project of mine in which I am getting data from multiple sensors into an 8051 microcontroller.
I'm building a car simulator in which I have various car components such as a steering ...
0
votes
1answer
234 views
Programming nRF24LE1 with an Amontec JTAG key
I'm a bit lost on how to program my nRF24LE1 with the Amontec JTAG key that I have. It seems as if it's possible, but I cant find any information on how to. On their website, on the contrary, there is ...
2
votes
1answer
718 views
Hardware and software to program AT89S52 chips with linux
Seeing that the ATMEL AT89S52 chips are so cheap (8 usd for 5 with free shipping from ebay!), are supposed to have a simple architecture and a lot of documentation available online, I would like to ...
2
votes
2answers
235 views
How can I reprogram a Megawin MPC89E52A?
I have a couple old gizmos that use the microcontroller Megawin MPC89E52A. I want to download the existing code, disassemble it, make my own changes and reprogram.
The datasheet seems pretty basic, ...
0
votes
2answers
248 views
controlling a 8051 microcontroller through bluetooth
My teacher wants to add Bluetooth communication to the electronic project in are school. He asked me to check out the possibility.
I tried googling, but I couldn't find anything I was sure about.
I ...
1
vote
2answers
405 views
PIC assembly code simplify
I need to convert the following PIC assembly code (below) to an 8051 assembly. It is an inline assembly code. Actually, I intend to convert it to C. I am not familiar with the PIC MCU so I do not ...
1
vote
2answers
327 views
8051 Dev Board?
I picked up a book about the 8051 Microprocessor. It's probably a school book, but I found it for cheap. It has lab manuals and it's pretty large and looks like it'll be a good learning tool.
...
0
votes
1answer
199 views
Frequency modulation and communication between two microcontrollers
I have good progamming skills and concepts on 8051 microncontroller. People suggest me to work on PIC and ARM micro-controllers but I want to make some small projects on 8051 and later move on to ...
4
votes
1answer
166 views
Read analog envelope by 8051
I am having a serious issue here. I've bought a Maxbotix XL ultrasonic sensor but I didn't know that it is the AE version, that does not come with pulse width, it comes with Analog Envelope. I have a ...
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votes
1answer
135 views
Internal circuits in 8051 to handle an External interrupts0 and External interrupts1 [closed]
Can you explain me the internal circuits in 8051 to handle interrupts in 8051
external interrupt0
external interrrupt1
timer0
timer1
serial interrupt
and also for reset with respect to 8051.
hope, i ...
1
vote
1answer
375 views
8051 SMARTCARD DESIGN
I'm trying to design a smart card interface using one 8051 UART and a Pierce oscillator circuit.
The project seems to be working, because I'm getting response from the smart card. However, I'm having ...
1
vote
0answers
568 views
Proteus 8051 microcontroller and lcd [closed]
I have just started using Proteus 7.7. I needed to build something like MDE 8051 Trainer from Digilent.. However, I could not build any components in Proteus because, in my opinion, is too complex. ...
4
votes
2answers
1k views
Baud-rate for 8051 Microcontroller
I will like to know if a baud-rate of 9600 is so fast for an 8051 MCU using an 11.0952Mhz crystal. Why? I have observed some inconsistency in the behavior of my MCU, in that when I send a set of ...
-1
votes
2answers
277 views
How can I control braking system electronically?
Is it possible to control the braking system and speed limiting of a car using a microcontroller? Please explain.
1
vote
2answers
474 views
How to control interrupt using timer in microcontroller
Hi I am using 8051 microcontroller. I do have a digital Water Meter which gives binary 0 1 0 1 type data.
I attached it with 8051 INT1 so that i can get interrupt. Now when ever water flow through ...
2
votes
1answer
154 views
8051 chip with USB
I need a 8051 chip with the following features.
SPI programmable. [ software supported on linux or windows]
With a internal configurable USB module.[with usb SIB]
5V electrical configuration.
Chip ...
1
vote
1answer
445 views
Simple open source ALU written in Verilog
I am working on a control unit as a project in my Verilog class. To get some burden off of me, I want to designed everything considering I have a 8051 type simple ALU already with me so I can work on ...
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votes
0answers
81 views
Book recommendations for 8051 [closed]
I was wondering if there are any recommendations out there for books for beginners on the 8051?
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vote
2answers
445 views
Programming nRF24LE1 with the AVRISP
Is it possible to program the nRF24LE1 with an AVRISP mkII? It has an Intel 8051, and I've noticed that AVR also supports this instruction set, so perhaps they already have a compiler in AVR Studio? ...
4
votes
1answer
292 views
Texas Instruments Compiler
I am working with TI's CC2533 SoC Low Power RF
I bought a few chips and assembled a few PCBs.. Using TI's debugger I confirmed that I can send and receive packets using the basic RF using the ...
-2
votes
1answer
199 views
Assembly Packed Bcd
I was trying to make a subroutine called count that will count the number of
occurences of the string ‘hello’ in the 64 KB external memory with 8051 microprocessor. What i wanted to make is that ...
0
votes
1answer
402 views
How to connect printer port with rs232 and usb in 8051 circuit?
I follow this link: http://m955.com/wp/archives/142
I will buy:
1.printer port
2.a line has both printer port and rs232
3.a line has both rs232 and usb
Is these ok for sending computer signal ...
1
vote
1answer
163 views
Is it possible to simulate ISP loader?
If I want to make ISP loader for 89Sxxxx(8051),can I simulate it by multisim or others before I really build it?
I follow this link:
http://m955.com/wp/archives/142
I found it has a little hard to ...
4
votes
2answers
530 views
8051 serial debug monitors
I'm working with an 8051 (Cypress FX2LP) that doesn't have jtag/bdm capability. Typically, developers on this project have been using ad-hoc serial printfs for debugging. I'm looking into options for ...
2
votes
1answer
248 views
need help “hacking” LED display
The display is a scrolling LED sign which looks like this:
It is also distributed in the US by Grandwell (SLC16H-IR). The messaging software that it comes with does not allow full control of the ...
5
votes
3answers
518 views
Project ideas for five hundred AT89C52s?
I happen to have some 500 old AT89C52 controllers and am looking for ideas how to use them in a project. That's an 8051-based controller with 8K Flash, so you get an idea. And no, trashing them is ...
5
votes
1answer
472 views
What is a good way to in-circuit update the program on a SyncMOS 5964?
I want something that can re-program a PQFP SyncMOS SM5964 chip already soldered to the target circuit board.
I picture a ribbon cable that I plug between some sort of 2x8 or so header connector ...
2
votes
1answer
583 views
Can I download a new program to a Silicon Labs C8051F311 with a JTAG programmer?
Or does that chip require a bunch of weird voltages that can only be generated by a "special" expensive device programmer?
5
votes
2answers
3k views
Beginner 8051 microcontroller kit recommendation?
I'm reposting this from stackoverflow, as the question is better suited here.
I'm a first year Computer Science student looking to get started with development for micro-controllers. I'd like to use ...
4
votes
4answers
268 views
New to embedded systems: help selecting the right chip for 8051 project?
We are to create an 8051 microcontroller based system as a university project. We have the specs, which says we need an Atmel 89C51 chip. But Atmel recommends that we use AT89S51 instead of AT89C51. ...
