symmetric power supply pic 16f877a

[josepic]

can you please help me by correcting the friend code?

[richard]

its just like deja vu all over again
https://support.melabs.com/forum/pic...de-pic-16f877a
4 years later still the same scant detail

[josepic]

Since nobody wanted to help me in this forum, I wanted to try again in this forum. is there a problem? if you are not going to help, do not criticize

[richard]

is there a problem?

i doubt many would risk unvetted content from google drive, youtube would be safer.
there is no config settings in your code.
what type of osc and speed.
what have you tried to port code to 16f886 and what happened.
does it work on a 16f877a.
has it ever worked or is it just a proteus simulation, proteus does not really work for some real time things.
there is no schematic.
why use fp ,can you really expect accuracy to 2 decimals.
what does symmetric power supply pic 16f877a mean ,the code is just a display
but the voltages flicker and do not complain fixed, what does this mean , are the voltages out of control or is it the the readings
two dp accuracy from single asynchronous adc results is not plausible afaics esp without a stable voltage reference for adc

[josepic]

In the google drive link I uploaded a video of the proteus simulation of the code with the negative and positive voltages flashing. the code works with pic 16f877a, microchip announced that it will stop making pic 16f877a and i want to migrate the code to work with pic 16f886. In addition, anyone can make a symmetrical source, in my case I implement a digital indicator with a pic and use an operational amplifier in inverter mode to input negative voltage to the pic, use a voltage divider for the positive input and not damage the adc of the pic. If it won't help, don't comment.

[Ioannis]

Get rid of Floating point. All will be much more smoother.

Either you like it or not, Richard has nailed the problems. If I were you, I would read carefully his suggestions.

Ioannis

[josepic]

If I eliminated the floating point, the positive and negative voltages would NOT be the same as those recorded by the voltmeters in the Proteus simulation. attached proteus simulation image I also attach the old code when I started to make the code with the first code the negative and positive voltages are different. so i expanded the code and now the negative and positive voltages are flashing, but the negative and positive voltages that register on lcd 20 x4 are the same as the voltmeters in the proteus simulation. if it won't help don't comment













DEFINE LCD_DREG PORTD
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTE
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTE
DEFINE LCD_EBIT 1
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2

DEFINE ADC_BITS 10
DEFINE ADC_CLOCK 3
DEFINE ADC_ SAMPLEUS 50

TRISC.6 = 0
TRISC.7 = 1
TRISA = 255
ADCON1 = %11000010
TRISB.6 = %0

LED VAR PORTB.6
B1 VAR WORD
B2 VAR WORD
VALOR1 VAR BYTE
VALOR2 VAR BYTE

STAR:
ADCIN 1, B1
ADCIN 2, B2
VALOR1=B1/9
VALOR2=B2/12

SEROUT2 PORTC.6,188,["$", "$", DEC4 B1,"$", "$",DEC4 B2,10,13]
LCDOUT $FE,2," SYMMETRIC FONT "
LCDOUT $FE,$C4," JOSE LUIS "
LCDOUT $FE,$90," VOLTAGE NEGATIVE:-",DEC2 VALOR1
LCDOUT $FE,$D0," VOLTAGE POSITIVE:+",DEC2 VALOR2
HIGH LED
GOTO STAR