wrong positive and negative voltages on lcd 20x4

[richard]

when corrected for a 2 line display as depicted in your code

DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTC
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTC
DEFINE LCD_EBIT 1
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2

it works in proteus much as expected

[josepic]

when corrected for a 2 line display as depicted in your code

DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTC
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTC
DEFINE LCD_EBIT 1
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2

it works in proteus much as expected

Attachment 9354

previously I had this code using pic 16f877a​

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​

If you look at the image you will see that the voltages registered in the 20x4 lcd are different from the voltages registered in the proteus dc voltmeter.
I had errors in the floating point and I was able to correct it with the 32-bit library.
and the other code is an improvement, but it still has errors, and in the simulation it shows it.
I hope you can help me correct the code and thanks again​

[richard]

VALOR1=B1/9
VALOR2=B2/12

b1 = 329 , b1/9 =35 target is 12.2 why divide by 9 ?
b2 = 360 , b2/12=30 target is 12.3 why divide by 12 ?


to get more resolution
dummy = b1*100
VALOR = div32 26
result = 1226 ie 12.26 *100

an even more accurate result is possible using */

[josepic]

b1 = 329 , b1/9 =35 target is 12.2 why divide by 9 ?
b2 = 360 , b2/12=30 target is 12.3 why divide by 12 ?


to get more resolution
dummy = b1*100
VALOR = div32 26
result = 1226 ie 12.26 *100

an even more accurate result is possible using */

In my previous code I had many errors due to the mathematical equations and I was able to partially correct these errors using the fp2032.bas library.
even the code continues with the errors in mathematical equations, for that reason I went to the lighthouse to see if they could help correct the code, thanks

[richard]

I went to the lighthouse to see if they could help correct the code

if you don't understand the math / pbp language then you can seek assistance
in this section of the forum [Commercial - Assistance Required] , your problem
description and solution attempts make little sense to me

[josepic]

if you don't understand the math / pbp language then you can seek assistance
in this section of the forum [Commercial - Assistance Required] , your problem
description and solution attempts make little sense to me

I will try and thank you very much for your help