Matrix user forums

Hi I've beening testing the response from an A/D input RA0. By putting the results directly onto an LCD display. but it does not seem to be as linear as I expected . Here are the results that I've achieved. Tested using DC bench supply. 1.0V = 192 2.0V = 384 2.5V = 480 3.0V = 527 4.0V = 704 5.0V = 8...

Hi me again !! Still struggling with eeprom memory :shock: I'm trying to save a recipe of numbers to eeprom memory. 5 time values ie ,1.5Sec's and a powerlevel say 600 watts. The time values, save and recalls as you would expect. But the powerlevel figure only will save a maximum number of 255 befor...

Hi all I've been trying to learn how to save several variables of information to eeprom memory which can be recalled later which will be stored like a selection of recipes. I know the 16F877A has 256 Bytes of eeprom memory but how many byte will each number variable take-up. Also the manual says it ...

Hi Ben

Just to let you know Ive added the adjustment to the code and now it works perfectly.

Thankyou Thankyou Dave

Hi me again ! :? I've been learning about how to use the a/d ports on a 16F877A . I have enabled the analog ports and have put two power supply (0-5V) on RA0 and RA1 . The result of the A/D conversion has then been placed upon a 2 Line lcd display. But for some reason when you adjust RA0 it also adj...

:lol: Hi ben Thank for the reply. I was trying to program a serial D/A convertor. Although in the end I managed to send data out of the SPI port I still could not get it working properlty. In the end I decided to bit_bang the bits to the device and all worked as expected although the code is alot lo...

Hi all Does someone have a simple piece of code written in C on how to operate the SPI port. I have downloaded the data manual for the PIC16F877A but being a bit simple. I am still confused. Here is what I've done so far #include<system.h> void main() { Trisc= 11000111; \\ setup port c sspstat= 1100...

Hi Does anyone have any examples on how to send serial data out of a port in C. In the manual it tells you to use SPI mode (SD0)RC5 to send serial data out of a port but I am not sure how you do this in 'C' ? I assumed that you would need a loop routine simliar to what I have done but how do you shi...

:oops: Hi I'm a very new to programming microcontroller and have been trying to set RA4 as an input and as the switch is hit RB1 shall light and after 4 pulses RB2 should light and RB1 stop and after 10 input pulses it should reset. But for some reason it does not do this. Also RB7 AND RB6 remain on...