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Hi guys
I am trying to interface the 4*4 matrix keyboard with lpc2148, I wrote the code for that, and to display the key pressed in the lcd, but it didn't work.
The keyboard connections:
columns: column 1 to column 4 connected to P1.21 to P1.24
rows: row 1 to row 4 connected to P1.17 to P1.20...
Hey guys I found that I have some problem with the Keil settings, as in the image attached, when this "use memory layout for target dialog" is ticked I got something in the LCD, even though I got weird characters rather than the expected ones, but at least there is something there. I don't know...
1\ IOCLR0 = 0x00003000; //here I cleared RW and RS
2\ IOSET0 = 0x00000400; //here I made En = 1
3\ IOCLR0 = 0x00780000; //here I cleared p.19 to p.22 for the data
4\ IOSET0 = a; //the command will be sent here
5\ delay(10000); //now En = 1, this delay is...
Sorry Ravi I just saw your comment, yeah I succeeded in glowing a LED and I wish I could help you with your project. So what do you need to know, and I can send you my thesis if you need.
Sorry for the latency again.
Thanks for your quick reply.
yeah I got black boxes which means nothing went to the lcd, not even the commands. In fact I tried another code ( which came with the kit for interfacing the lcd) and it worked fine.
I need to figure out what the problem with my code.
Hi guys
I am trying to interface LPC2148 with 16*2 LCD and I got nothing at all in the LCD, I don't know why, here is my code -I thought that it should work -
Note: Data connected to P0.19 P0.20 P0.21 P0.22
Enable P0.10
RS P0.13
RW P0.12
#include <LPC214X.H>...
hello wimRFP, sorry again for latency but i just finished my exams.
now am writing my thesis about the wireless transmission of power through inductively coupled resonators if you remember.
practically i used an ordinary signal generator instead of the suggested colpitts oscillator, and i came...
am trying to understand the impedance matching technique and having some problems.
for the circuit attached, what is the load impedance that achieve maximum power to it ?
thanx WimRFP.
but why the input is square wave ? and in which frequency should the oscillation be ? because the maximum amplitude got in 500 KHz -not the rsonant frequency of any LC circuit- ?
i asked you earlier about the rectifier circuit and why do i need it ?
@FvM: as i mentioned am using the parasitic capacitance of the coil to hit the resonance, you are right i didn't use a seperate capacitance in the simulation since i am now concerned only with building a suitable oscillator.
@WimRFP: i didn't get the matching you're trying to explain ! since...
hello
thanx again for make it easier, i got the components of the circuit and will construct it soon, then will reply.
now i have another question,not related to the oscillator circuit nor amplification. it is about the impedance matching and how can i use it to obtain better results ?
i read...
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