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LCD and pic not comunication

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Thx you all for your Help!You are a great man!!The last my problem is why the LCD behave like i show in the pics?And my curiosity is wy it's work after i flash the PIC with .hex after i disconnect the LCD from the PIC.On a shield,or project,or other platform where the LCD is connected on PCB with the PIC why it's worked?How you can flash the PIC on that situation with LCD connected on PIC and works?Can anybody help me on this?Please,i try to learn and understand musc better from this land of PIC,embeded,and electronics stuff.Please!
 

Both PIC and LCD ground should be common.

mikroC LCD library works fine with JHD1602A and JHD204A.

In mikroC PRO PIC Library Manager uncheck the LCD and LCD Constants Libraries and use the below code to test. Increase EN_Delay value if needed and test.

Code C - [expand]
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#define _LCD_FIRST_ROW          0x80     //Move cursor to the 1st row
#define _LCD_SECOND_ROW         0xC0     //Move cursor to the 2nd row
#define _LCD_THIRD_ROW          0x94     //Move cursor to the 3rd row
#define _LCD_FOURTH_ROW         0xD4     //Move cursor to the 4th row
#define _LCD_CLEAR              0x01     //Clear display
#define _LCD_RETURN_HOME        0x02     //Return cursor to home position, returns a 
                                         //shifted display to its original position.
                                         //Display data RAM is unaffected.
#define _LCD_CURSOR_OFF         0x0C     //Turn off cursor
#define _LCD_UNDERLINE_ON       0x0E     //Underline cursor on
#define _LCD_BLINK_CURSOR_ON    0x0F     //Blink cursor on
#define _LCD_MOVE_CURSOR_LEFT   0x10     //Move cursor left without changing 
                                         //display data RAM
#define _LCD_MOVE_CURSOR_RIGHT  0x14     //Move cursor right without changing 
                                         //display data RAM
#define _LCD_TURN_ON            0x0C     //Turn Lcd display on
#define _LCD_TURN_OFF           0x08     //Turn Lcd display off
#define _LCD_SHIFT_LEFT         0x18     //Shift display left without changing 
                                         //display data RAM
#define _LCD_SHIFT_RIGHT        0x1E     //Shift display right without changing 
                                         //display data RAM
 
#define EN_DELAY 1500
#define LCD_STROBE {LCD_EN = 1; Delay_us(EN_DELAY); LCD_EN = 0; Delay_us(EN_DELAY);};
 
sbit LCD_RS at LATC0_bit;
sbit LCD_EN at LATC1_bit;
sbit LCD_D4 at LATC2_bit;
sbit LCD_D5 at LATC3_bit;
sbit LCD_D6 at LATC4_bit;
sbit LCD_D7 at LATC5_bit;
 
sbit LCD_RS_Direction at TRISC0_bit;
sbit LCD_EN_Direction at TRISC1_bit;
sbit LCD_D4_Direction at TRISC2_bit;
sbit LCD_D5_Direction at TRISC3_bit;
sbit LCD_D6_Direction at TRISC4_bit;
sbit LCD_D7_Direction at TRISC5_bit;
 
void LCD_Cmd(char out_char) {
 
    LCD_RS = 0;
 
    LCD_D4 = (out_char & 0x10)?1:0;
    LCD_D5 = (out_char & 0x20)?1:0;
    LCD_D6 = (out_char & 0x40)?1:0;
    LCD_D7 = (out_char & 0x80)?1:0;
    LCD_STROBE
    LCD_D4 = (out_char & 0x01)?1:0;
    LCD_D5 = (out_char & 0x02)?1:0;
    LCD_D6 = (out_char & 0x04)?1:0;
    LCD_D7 = (out_char & 0x08)?1:0;
    LCD_STROBE
 
    if(out_char == 0x01)Delay_ms(2);
}
 
void LCD_Chr(char row, char column, char out_char) {
 
    switch(row){
 
        case 1:
        LCD_Cmd(0x80 + (column - 1));
        break;
        case 2:
        LCD_Cmd(0xC0 + (column - 1));
        break;
        case 3:
        LCD_Cmd(0x94 + (column - 1));
        break;
        case 4:
        LCD_Cmd(0xD4 + (column - 1));
        break;
    }
 
    LCD_RS = 1;
 
    LCD_D4 = (out_char & 0x10)?1:0;
    LCD_D5 = (out_char & 0x20)?1:0;
    LCD_D6 = (out_char & 0x40)?1:0;
    LCD_D7 = (out_char & 0x80)?1:0;
    LCD_STROBE
 
    LCD_D4 = (out_char & 0x01)?1:0;
    LCD_D5 = (out_char & 0x02)?1:0;
    LCD_D6 = (out_char & 0x04)?1:0;
    LCD_D7 = (out_char & 0x08)?1:0;
    LCD_EN = 1;
    LCD_STROBE
}
 
void LCD_Chr_Cp(char out_char) {
 
    LCD_RS = 1;
 
    LCD_D4 = (out_char & 0x10)?1:0;
    LCD_D5 = (out_char & 0x20)?1:0;
    LCD_D6 = (out_char & 0x40)?1:0;
    LCD_D7 = (out_char & 0x80)?1:0;
    LCD_STROBE
 
    LCD_D4 = (out_char & 0x01)?1:0;
    LCD_D5 = (out_char & 0x02)?1:0;
    LCD_D6 = (out_char & 0x04)?1:0;
    LCD_D7 = (out_char & 0x08)?1:0;
    LCD_EN = 1;
    LCD_STROBE
}
 
 
void LCD_Init() {
 
    Delay_ms(200);
 
    LCD_RS_Direction = 0;
    LCD_EN_Direction = 0;
    LCD_D4_Direction = 0;
    LCD_D5_Direction = 0;
    LCD_D6_Direction = 0;
    LCD_D7_Direction = 0;
 
    LCD_RS = 0;
    LCD_EN = 0;
    LCD_D4 = 0;
    LCD_D5 = 0;
    LCD_D6 = 0;
    LCD_D7 = 0;    
    
    Delay_ms(30);
 
    LCD_D4 = 1;
    LCD_D5 = 1;
    LCD_D6 = 0;
    LCD_D7 = 0;
 
    Delay_ms(3);
 
    LCD_STROBE
 
    Delay_ms(30);
 
    LCD_D4 = 1;
    LCD_D5 = 1;
    LCD_D6 = 0;
    LCD_D7 = 0;
 
    Delay_ms(3);
 
    LCD_STROBE
 
    Delay_ms(30);
 
    LCD_D4 = 1;
    LCD_D5 = 1;
    LCD_D6 = 0;
    LCD_D7 = 0;
 
    Delay_ms(3);
 
    LCD_STROBE
 
    Delay_ms(30);
 
    LCD_D4 = 0;
    LCD_D5 = 1;
    LCD_D6 = 0;
    LCD_D7 = 0;
 
    Delay_ms(3);
 
    LCD_STROBE
 
    Delay_ms(10);
 
    LCD_Cmd(0x28);
    LCD_Cmd(0x10);
    LCD_Cmd(0x0C);
    LCD_Cmd(0x06);
}
 
void LCD_Out(char row, char col, char *text) {
    while(*text)
         LCD_Chr(row, col++, *text++);
}
 
void LCD_Out_Cp(char *text) {
    while(*text)
         LCD_Chr_Cp(*text++);
}
 
void main() { 
        
    TRISA = 0xC0;
    TRISB = 0x00;
    TRISC = 0x00;
    
    PORTA = 0x00;
    PORTB = 0x00;
    PORTC = 0x00;
    
    LATA = 0x00;
    LATB = 0x00;
    LATC = 0x00;
       
    LCD_Init();
    LCD_Cmd(_LCD_CURSOR_OFF);
    LCD_Cmd(_LCD_CLEAR);
    
    LCD_Out(1,1,"Testing...");
    LCD_Out(2,1,"RG1602A");
    
    while(1) {
    
    
    }
}
 

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