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Hi....thanks for taking an interest,,,,my problem is that the ADC is giving zero values for all input. The programming is correct as the onboard adc is working correctly.....
you want an illustration? as in ckt diagram?
Hi all,
As a part of a larger project, I have to read analog data through ADC 0809, send the data to 8051 microcontroller and then to PC(MATLAB) serially. Everythings fine wen I am using the evaluation board in our lab...but the ADC n this board has only 1 channel available and i need 6....so I...
Re: matlab serial communication
In case ur problem is still not solved.....try using fread command instead of fscan to recieve data and fwrite to send data.......I faced the same problem and now it works :)
Hi....thanks for helping! I am looking into the software flow control....
I am also thinking this: since I am not using the Rx pin on my microcotroller or any other purpose, I can use this to notify the microcontroller when the MTLAb programme has completed one run and is ready to recieve more...
Hi thanks for replying....but my book says tht the 8051 UART doesnt support handshaking signals in RS232,,,,,,that is only the Rx, Tx and ground lines are connected between the microcontroller and the RS 232 pin connector in my microcontroller evaluation board.......
So is there any other way to...
Hi All,
I have interfaced my data aquisition system consisting of a AT89C51 microcontroller with MATLAB on my PC for real time Harmonic analysis of power signals( continuous monitoring). My question is is there a way to notify my microcontroller tht the input buffer of the MATLAB is full so...
Can someone please suggest a sample and hold ic tht is to be used in conjuction with an ADC 0809 and 8051 microcontroller....
also can u tell me wat exactly is the role of a crystal oscillator....how do iconnect it to a S/H ic?
Hi...
ya I tried with a limited lenght of data and it works fine :) .....now i need to work out for a continuos real time analysis of my power signal...
My 'data' is a continuos stream of 8-bit-wide digital inputs.....therefore 'number of elements in the file' is infinite.....My 'time out error' has been resolved (there was a problem with the physical interfacing)....but the loop is still not working...(as in there is a size mismatch which u...
Hi all,
I am doing a project which involves the calculation of harmonics of a digital signal(from a microcontroller) connected serially to MATLAB through COM1 port.
The code is as follows:
Fs = 1000; % Sampling frequency
T = 1/Fs; % Sample time
L = 1000...
Yes, I agree....for better resolution N should be higher....but too high valuhat of N will slow down my microcontroller,,,,as the end application is for fault detectin and clearing of power circuits...time is crucial....
Having to take care of time delay, accuracy, and bound to use 8051...is...
The sampling frequency is 12 khz... it follows the Nyquist theorum...N=250, required frequencies are 50 Hz(fundamental) and its second harmonic.......this gives k=1.04(k=N*Fs/Fk)
This is the Goertzel code being used(not running)
static int N=0;
static int goertzel value=0;
int...
Hi....thanks for your reply....i will try this... :)
---------- Post added at 08:16 ---------- Previous post was at 08:07 ----------
Hi....the only available 8051 microcontroller board in my lab is one that is using Atmel 89c51ed2 or intel 8051....cant really change the clock frequency....
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