Pin Function Grouping

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For a part project like this, each terminal should belong to one primary functional group only, not be repeated across multiple overlapping groups. The recommended rule is to assign every pin exactly one section/group, with power and ground separated cleanly, and for MCUs to group GPIO-style pins by their shared prefix or bank .

A cleaner non-duplicated grouping for this device would be:

Functional groups

Group	Pins
Power	VDD_1, VDD_2
Ground	VSS_1, VSS_2
Control	~~MCLR~~/VPP
Clock	OSC1/CLKI, OSC2/CLKO
Port A	RA0/AN0, RA1/AN1, RA2/AN2/VREF-/CVREF, RA3/AN3/VREF+, RA4/T0CKI/C1OUT, RA5/AN4/SS/C2OUT
Port B	RB0/INT, RB1, RB2, RB3/PGM, RB4, RB5, RB6/PGC, RB7/PGD
Port C	RC0/T1OSO/T1CKI, RC1/T1OSI/CCP2, RC2/CCP1, RC3/SCK/SCL, RC4/SDI/SDA, RC5/SDO, RC6/TX/CK, RC7/RX/DT
Port D	RD0/PSP0, RD1/PSP1, RD2/PSP2, RD3/PSP3, RD4/PSP4, RD5/PSP5, RD6/PSP6, RD7/PSP7
Port E	RE0/RD/AN5, RE1/WR/AN6, RE2/CS/AN7

That matches the guidance to:

put VDD/VSS into dedicated power/ground groupings
put clock pins into a clock group
put reset/configuration into control
group MCU I/O pins by their shared port prefix like Port A, Port B, etc., instead of repeating them again in analog, communication, or debug buckets .

So yes:

good: Power = VDD_1, VDD_2
good: Ground = VSS_1, VSS_2
good: Port B = RB0 ... RB7
not ideal: putting RB6/PGC in both Port B and Debug

If you want, I can next turn this into the exact Flux-style properties for each terminal:

Section
Pin Group
Sub-symbol Designator Suffix

Avoid duplicate grouped pins

Clean up duplicate pins

Use unique pin membership

Resolve ambiguous functions

6 days

puedes hacer una simulacion de este codigo: \#include <16F877A.h> \#device \*=16...

saucrak

puedes hacer una simulacion de este codigo: #include #device *=16

#FUSES NOWDT //No Watch Dog Timer #FUSES XT //Low power xtal #FUSES PUT //Power Up Timer #FUSES NOPROTECT //Code not protected from reading #FUSES BROWNOUT //Reset when brownout detected #FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O

#use delay(crystal=4MHz) //Cristal de 4 MHz

#include //Incluye la librería LCD

void main() { unsigned int contador = 0; // Contador char buffer[5]; // Buffer para el número a mostrar en el LCD

// Inicialización del LCD
lcd_init();

// Configuración de los pines del puerto B
set_tris_b(0x03); // RB0 y RB1 como entradas

while(TRUE) {
    // Detección del botón de incremento
    if(input(PIN_B0)) {
        delay_ms(50); // Antirrebote
        if(input(PIN_B0)) {
            contador++;
            if (contador > 9999) // Limitar el contador a cuatro dígitos
                contador = 0;
            while(input(PIN_B0)); // Espera a que se suelte el botón
        }
    }

    // Detección del botón de decremento
    if(input(PIN_B1)) {
        delay_ms(50); // Antirrebote
        if(input(PIN_B1)) {
            if(contador == 0) // Manejo del desbordamiento bajo
                contador = 9999;
            else
                contador--;
            while(input(PIN_B1)); // Espera a que se suelte el botón
        }
    }

    // Mostrar el contador en el LCD
    sprintf(buffer, "%04u", contador); // Convertir el contador a string de 4 dígitos
    lcd_gotoxy(1, 1); // Posicionar el cursor en la posición inicial
    lcd_putc(buffer); // Mostrar el contador en el LCD
}

}

copilot

Simular directamente el código C escrito para un PIC16F877A-I/P en un entorno de simulación sin un compilador específico y una herramienta de simulación no es posible de manera directa aquí. Sin embargo, puedo ayudarte a crear un esquema preliminar en Flux y brindarte una guía detallada para montar este circuito que luego puedes simular usando un simulador PIC como MPLAB X y un entorno adicional como Proteus.

Manejemos las conexiones del hardware necesario para tu código:

Conexiones del PIC16F877A-I/P:

Alimentación:
- Connect VDD_1 (Pin 11) a +5V
- Connect VSS_1 (Pin 12) a GND
- Connect VDD_2 (Pin 32) a +5V
- Connect VSS_2 (Pin 31) a GND
Oscilador:
- Connect OSC1/CLKI (Pin 13) a uno de los terminales del cristal de 4MHz
- Connect OSC2/CLKO (Pin 14) al otro terminal del cristal de 4MHz
- Conecta condensadores de 22pF entre cada pin del cristal y GND (estos valores pueden variar).
MCLR:
- Connect ~~MCLR~~/VPP (Pin 1) a +5V a través de una resistencia de 10kΩ
Botones:
- Connect un extremo de un botón al RB0 (Pin 33) y el otro a GND.
- Connect un extremo de un botón al RB1 (Pin 34) y el otro a GND.
LCD:
- Conéctalo a los pines adecuados del PIC según tu librería lcd.c. Normalmente, esto puede variar, pero una configuración típica podría ser:
```
LCD_RS -> Pin del PIC (Ej: RC4)
LCD_RW -> Pin del PIC (Ej: RC5)
LCD_E  -> Pin del PIC (Ej: RC6)
LCD_D4 -> Pin del PIC (Ej: RD4)
LCD_D5 -> Pin del PIC (Ej: RD5)
LCD_D6 -> Pin del PIC (Ej: RD6)
LCD_D7 -> Pin del PIC (Ej: RD7)
```
Asegúrate de definir estos pines correctamente en el archivo lcd.c si no están definidos.

Para los pines específicos del LCD, necesitarás referencias del archivo lcd.c para las conexiones correctas. Con esto en mente, puedes simular y probar el programa utilizando un entorno que soporte el compilador del Microchip y simulación de hardware, como MPLAB X y Proteus.

Flujo general de la simulación:

Compilación y Carga:
- Usa MPLAB X para escribir y compilar el código y generar el archivo HEX.
Simulación:
- Importa el archivo HEX generado en una herramienta como Proteus.
- Construye el mismo circuito en Proteus con los componentes simulados.
- Ejecuta la simulación y observa los resultados en el LCD.

Si tienes algún problema específico con la configuración del circuito en Flux o con los detalles de la biblioteca lcd.c, por favor házmelo saber para que pueda asistirte más.

Someone is typing...

RA2/AN2/VREF-/CVREF

RB4

RE1/~WR~/AN6

RB6/PGC

RB2

RE2/~CS~/AN7

RD6/PSP6

RD7/PSP7

RB1

VDD_2

RA0/AN0

VSS_2

RB5

VSS_1

RA4/T0CKI/C1OUT

RA3/AN3/VREF+

RD5/PSP5

RB3/PGM

RB7/PGD

VDD_1

RA1/AN1

RA5/AN4/~SS~/C2OUT

~MCLR~/VPP

RE0/~RD~/AN5

RB0/INT

OSC1/CLKI

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Project Name

PIC16F877A-I/P

Description

PIC PIC® 16F Microcontroller IC 8-Bit 20MHz 14KB (8K x 14) FLASH 40-PDIP The PIC16F877A-I/P is a high-performance 8-bit microcontroller from Microchip Technology, based on a Harvard architecture with separate program and data memory buses. It is designed for a wide range of embedded applications requiring reliable processing, multiple communication interfaces, and analog capability. The device integrates Flash program memory, EEPROM data storage, and numerous peripherals including ADC, timers, serial communication modules, and PWM functions. Packaged in a 40-pin PDIP form factor, it is widely used in industrial automation, consumer electronics, and educational development systems. Core Features 8-bit PIC microcontroller architecture Harvard architecture with RISC instruction set Operating frequency up to 20 MHz Single-cycle instruction execution (except branches) Memory Program Memory: 8K words (Flash) Data Memory (RAM): 368 bytes EEPROM Data Memory: 256 bytes I/O Features Up to 33 programmable I/O pins Multiple input/output ports (PORTA, PORTB, PORTC, PORTD, PORTE) High current sink/source capability on selected pins Analog Features 10-bit Analog-to-Digital Converter (ADC) Up to 8 analog input channels Programmable voltage reference Timers and Control Three timers (Timer0, Timer1, Timer2) Capture/Compare/PWM (CCP) modules Watchdog Timer (WDT) Power-on Reset (POR) and Brown-out Reset (BOR) Communication Interfaces USART (Universal Synchronous/Asynchronous Receiver/Transmitter) SPI (Serial Peripheral Interface) I²C (Inter-Integrated Circuit) via MSSP module Electrical Characteristics Operating Voltage: 4.0V to 5.5V Operating Temperature Range: -40°C to +85°C (Industrial grade) Low power consumption modes available Package Information Package Type: PDIP (Plastic Dual Inline Package) Pin Count: 40 pins Mounting Type: Through-hole Applications Industrial control systems Embedded automation Consumer electronics Sensor interfacing and data acquisition Educational and prototyping platforms #commonpartslibrary #integratedcircuit #microcontroller

Properties

Part Type

Microcontroller

Manufac…er Name

Microchip Technology

Manufac… Number

PIC16F877A-I/P

Datasheet URL

microchip.com/downloads/en/DeviceDoc/39582C.pdf

Designator Prefix

License

creativecommons.org/licenses/by/4.0/

Symbol Style

parametric-v1

Pricing & Availability

Distributor	Qty 1

Controls

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adrian95 / PIC16F877A-I/P

Schematic