This is my main function:
#define HX711_DT PORTC.F5
#define HX711_DT_TRIS TRISC.F5
#define HX711_SK PORTC.F4
#define HX711_SK_TRIS TRISC.F4
#define IR_Sensor1 PORTD.F0
#define IR_Sensor1_TRIS TRISD.F0
#define IR_Sensor2 PORTD.F1
#define IR_Sensor2_TRIS TRISD.F1
#define INDUCTIVE PORTD.F2
#define INDUCTIVE_TRIS TRISD.F2
void SENSORS_Init();
void HX711_Init() ;
void nFloatToStr(float f, short p, char *txt);
unsigned long HX711_Read(void); //HX711 Driver
void SETUP_WeightSensor(); //Calibrating Weight Sensor
//LCD module connections
sbit LCD_RS at RB2_bit; //LCD reset
sbit LCD_EN at RB3_bit; //LCD enable
sbit LCD_D4 at RB4_bit; //Data
sbit LCD_D5 at RB5_bit; //Data
sbit LCD_D6 at RB6_bit; //Data
sbit LCD_D7 at RB7_bit; //Data
sbit LCD_RS_Direction at TRISB2_bit;
sbit LCD_EN_Direction at TRISB3_bit;
sbit LCD_D4_Direction at TRISB4_bit;
sbit LCD_D5_Direction at TRISB5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
// End LCD module connections
//GLOBAL VARIABLES
long count = 0;
long offset = 0;
float mul = 0;
float weight = 0;
float reward = 0;
unsigned char Cweight[10];
unsigned char Creward[10];
void main() {
//CMCON = 0; //0x07; // To turn off comparators
//ADCON1 = 0; //0x06; // To turn off analog to digital converters
SENSORS_Init();
HX711_Init(); //Initializing Weight Sensor
Lcd_Init();
Lcd_Cmd(_LCD_CLEAR);
UART1_Init(19200); //Initializing Thermal Printer
delay_ms(100);
SETUP_WeightSensor(); //Calibrating Weight Sensor
while(1)
{
if(INDUCTIVE == 0 && IR_Sensor2 == 0 && IR_Sensor1 == 0)
{
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,5,"SODA CAN");
Lcd_Out(2,5,"DETECTED");
//delay_ms(100);
/*************PRINTS RECEIPT*************/
count = HX711_Read();
weight = (((count-offset)/mul)-2*((count-offset)/mul));
if(weight > 0)
{
UART1_Write_Text("Weight [g]: ");
delay_ms(50);
nFloatToStr(weight, 0, Cweight);
UART1_Write_Text(Cweight);
delay_ms(50);
UART1_Write_Text("\n");
delay_ms(50);
UART1_Write_Text("Reward: Php ");
delay_ms(50);
reward = (30*weight)/1000;
nFloatToStr(reward, 2, Creward);
UART1_Write_Text(Creward);
delay_ms(50);
UART1_Write_Text("\n\n");
delay_ms(50);
UART1_Write_Text("THANK YOU!\n\n\n");
delay_ms(3000);
}
/*************END OF PRINTS RECEIPT*************/
}
else if(INDUCTIVE == 0 && IR_Sensor2 == 0 && IR_Sensor1 == 1 )
{
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,5,"SODA CAN");
Lcd_Out(2,5,"DETECTED");
//delay_ms(100);
/*************PRINTS RECEIPT*************/
count = HX711_Read();
weight = (((count-offset)/mul)-2*((count-offset)/mul));
if(weight > 0)
{
UART1_Write_Text("Weight [g]: ");
delay_ms(50);
nFloatToStr(weight, 0, Cweight);
UART1_Write_Text(Cweight);
delay_ms(50);
UART1_Write_Text("\n");
delay_ms(50);
UART1_Write_Text("Reward: Php ");
delay_ms(50);
reward = (30*weight)/1000;
nFloatToStr(reward, 2, Creward);
UART1_Write_Text(Creward);
delay_ms(50);
UART1_Write_Text("\n\n");
delay_ms(50);
UART1_Write_Text("THANK YOU!\n\n\n");
delay_ms(3000);
}
/*************END OF PRINTS RECEIPT*************/
}
else
{
Lcd_Cmd(_LCD_CLEAR);
Lcd_Cmd(_LCD_CURSOR_OFF);
Lcd_Out(1,6,"INSERT");
Lcd_Out(2,5,"SODA CAN");
delay_ms(500);
}
//delay_ms(50);
}
}
I am actually a beginner with embedded systems and I'm not that well-versed with pic16f877a. So my main problem is that, on the first Soda Can, I could get the desired output which is to display "Soda Can Detected" on the LCD and then prints out a receipt from the thermal printer. However, on the succeeding Soda Cans, the LCD displays the value of Cweight/Creward instead of "Soda Can Detected" (the printer works fine though).
It would be much appreciated if you could help me with this. Thanks ahead.
