Undeclared (First use in function) error / XC16 - c

Question

When selecting the "Build Main Project" and attempting to compile my project, the compiler keeps bringing up these error messages:
Source.c:64:8: error: 'RB6' undeclared (first use in this function)
I believe it has something to do with my #define lines of code, but I'm not certain:
// Include Commands
#include "xc.h"
#include "lcd.h"
#include <stdio.h>
#include <stdlib.h>
#include "pragma.h"
#include <stdbool.h>
// Define Commands
#define LCD_RS RB7
#define LCD_D0 RB15
#define LCD_D1 RB14
#define LCD_D2 RB13
#define ULTRAECHO RA4
#define ULTRATRIG RB5
#define PIR RB6
#define PIRII RB7
#define MOTOR RB4
#define MOTORII RB12
#define XTAL_FREQ 8000000
void setup() {
// A-Type Registers
TRISA = 0;
// 0 - 5
PORTA = 0;
// B-Type Registers
TRISB = 0;
// 0 - 15
PORTB = 0;
LCD_Cmd(LCD_CLEAR);
__delay_ms(50);
LCD_Begin();
}
void loop() {
int value;
value = 0;
__delay_ms(300);
PORTBbits.RB6 = 1;
PORTBbits.RB7 = 1;
if (PIR == 1 || PIRII == 1) { // Checks both PIR Sensors
PORTBbits.RB8 = 1; // Activates LCD Screen
PORTBbits.RB15 = 1;
PORTBbits.RB14 = 1;
PORTBbits.RB13 = 1;
PORTAbits.RA4 = 1; // Activates ULTRASONIC
PORTBbits.RB5 = 1;
LCD_Cmd(LCD_CLEAR);
(value = value + 1);
}
else {
PORTBbits.RB8 = 0; // No Life Detected
PORTBbits.RB15 = 0;
PORTBbits.RB14 = 0;
PORTBbits.RB13 = 0;
(value = value);
}
{
LCD_Goto(1, 1);
LCD_Print(value);
goto __delay_ms(300);
}
{
if (PORTAbits.RA4 = 1 || PORTBbits.RB5 = 1) {
__bit wait_sensor(); // Activates Timer
uint16_t i = 0;
TMR1 = 0; // Resets Timer
TMR1 = 1;
while (!ULTRAECHO && (i < 1000)) {
i = (TMR1 << 8) | TMR1;
if (i >= 1000)
return 0;
else {
return 1;
}
}
}
__bit get_distance(uint16_t *ticks);
{
uint16_t *ticks = 0;
TMR1 = 0;
while (ULTRAECHO && ('uint16_t *ticks' < 23200))
uint16_t *ticks = (TMR1 << 8) | TMR1; // Read Timer Value
TMR1 = 0;
if (uint16_t *ticks >= 23200)
return 1;
else {
return 0;
}
}
{
OSCCON = 0x70; // Sets Timer and Oscillator Value
T1CON = 0x10;
TMR1 = 0;
__delay_ms(500);
ULTRATRIG = 0; // Toggle Pin to LOW
__delay_us(2);
ULTRATRIG = 1; // Generate 10us Pulse
__delay_us(10);
ULTRATRIG = 0;
if (ULTRAECHO = 1) // Read Pulse from ULTRAECHO
uint16_t distance;
if (get_distance()) { // Distance greater than 400cm
LCD_Goto(2, 1);
LCD_Print(" No Proximity ");
MOTORII = 0;
MOTOR = 0;
}
else {
uint16_t distance = uint16_t distance / 58; // Calculates Distance
LCD_Goto(2, 1);
LCD_Print(distance, " cm ");
MOTORII = 1;
MOTOR = 1;
}
uint16_t distance = uint16_t distance / 58;
if (uint16_t distance <= 20)
MOTORII = 0;
MOTOR = 0;
__delay_ms(500);
goto void setup();
}
}
}
Perhaps the placement of my "define" commands are incorrect? Or is there some sort of line of code I'm forgetting? I feel like I'm overthinking this.

Answer 1

Yes, there are issues with your #define directives. They are not defined as they ought to be.
In this block of code:
// Define Commands
#define LCD_RS RB7
#define LCD_D0 RB15
#define LCD_D1 RB14
#define LCD_D2 RB13
#define ULTRAECHO RA4
#define ULTRATRIG RB5
#define PIR RB6
#define PIRII RB7
#define MOTOR RB4
#define MOTORII RB12
Define those macros as:
#define LCD_RS PORTBbits.RB7 //Check if it is RB7 or RB8, as somwhere it is RB8
#define LCD_D0 PORTBbits.RB15
#define LCD_D1 PORTBbits.RB14
#define LCD_D2 PORTBbits.RB13
#define ULTRAECHO PORTAbits.RA4
#define ULTRATRIG PORTBbits.RB5
#define PIR PORTBbits.RB6
#define PIRII PORTBbits.RB7
#define MOTOR PORTBbits.RB4
#define MOTORII PORTBbits.RB12
And use them for example as:
...
PIR = 1;
PIRII = 1;
if (PIR == 1 || PIRII == 1) { // Checks both PIR Sensors
LCD_RS = 1; // Activates LCD Screen
LCD_D0 = 1;
LCD_D1 = 1;
LCD_D2 = 1;
...
Apart from those issues, I think your Input and Output configuring registers TRISA and TRISB are not properly configured.
// A-Type Registers
TRISA = 0;
// 0 - 5
PORTA = 0;
// B-Type Registers
TRISB = 0;
// 0 - 15
PORTB = 0;

Answer 2

In the controller header there is a define like:
#define _RB7 PORTBbits.RB7
so you could also use something like:
#define LCD_RS _RB7