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Hi,I know this is going to sound like a very lame question. In my country we only have 1 public channel. I recently discovered my television can pick up other channels, which have the same numbering as the cable channels. Certain channels I get great audio but poor visual,and on some channels I...
openusart
I got it to work. I will show both sets of my working code. I still need help with something.
code of the transmitting device
#include <p18f452.h>
#include <timers.h>
#include <xlcd.h>
#include <delays.h>
#include <stdlib.h>
#include <usart.h>
#include <string.h>
/* Set...
openusart
Hi,I'm using two PIC 18F452 microcontrollers in two devices that I'm building. One microcontroller has to transmit a reading to the second microcontroller. I'm using USART implementing rs-232. The first device transmits well,I checked the output using the hyperterminal of the pc.
I...
Do I have to clear the TMR0IE in the ISR? Do I have to do anything to renable the timer to interrupt? Do I have to reset the timer or after it overflows it resets itself automatically? Is there anything that looks wrong in my code?
I'm using a 4MHz clock. Internal clock source,therefore using...
thank you for your help flatulent.
Why does the time constant with one half of a resistor value have to be several times the slowest rotation pulse period?
OK,I just realised that the timers can operate independently of the operations of the rest of the PIC. I need the pic to do a certain task every 2 seconds,it has to be every 2 seconds.Can I used timer0 on the PIC18f452 to do this.I'm really pressed for time,could someone help me do this.I"m...
Thank you for all your help.I've attached the spec sheet for the sensor. The sensor can measure +/-600Amps. The output is +/-6V. If I'm measuring only 0-600Amps, should I cater for the -600Amps? Would the 0-600Amps output only 0-6V?
I would then use a potential divider onto PIC,so maximum it can...
I need help with something.I"m using a sensor which can output -6Vdc to 6Vdc. I'm using a potential divider to get max of +5V entering my PIC18f452. I would like to be able to safe guard my PIC for negative voltages and voltages greater than +5V. What should I do to protect the PIC?
putsusart c18
I didn't want to start a new thread,so I'm asking here.
In c18 compiler, when do you use "#define "?
How do I write constants to the PIC18f452's ROM using c18 compiler?
Can an ISR's function read constants from the PIC's ROM?
Please help if you can,I know it may seem like simple...
putsusart
I'm not experienced with writting code.I"m using the c18 compiler and a PIC 18f452.I used the manual to help me. This code was written to recieve an interrupt every 2 seconds from a 555 timer. When the interrupt is recieved, the readings of two sensors are taken using ADC. A wirespeed...
optical encoder circuit
I'm using an rs 341-575 optical shaft encoder. The spec sheet has application notes on how to use it to determine speed.
They gave a circuit which the output of the encoder has to pass through.
I'm interfacing the output of this circuit with a PIC18f452. I'm using the...
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