question

[hussien]

when i installed the program and trying to write an example on lcd. i found the lcd library not working and the program can not include it

i want any one help me in this problem very fast
thanks all

[goran.marinkovic]

Hi,

Our library is tested a lot and works well.
Can you give us more information about your Hardware? Which development board and LCD do you use?

Regards

[hussien]

i am use AT89C52 and YMS204-02ABBFDCL for lcd

[hussien]

the error statement is:
undeclared identifier"LCD_OUT" in expression

[goran.marinkovic]

Hi,

Please make sure that you checked in Library Manager, Lcd_Constants and Lcd library options.
Inform me about results.

Regards

[hussien]

i want to say anthor thing that if i presed ctrl+space it cannot find the library functions
so it is library not work properly

[goran.marinkovic]

Hi,

You should try our example for LCD because it is tested and it works.
Our examples are open source, so you can use them as a starting point for your project.

Regards

[hussien]

i tried it and it was very perfect

Do you want to say add LCD fiiles to my project ?

[srdjan]

Hi,

Please make sure that you checked in Library Manager, Lcd_Constants and Lcd library options.
Inform me about results.

Regards

[hussien]

hi;
i solved the problem and every thing good
thanx for ur attention

[adam1234]

Hi

Few days ago I've got my Easy8051 v6.
I wrote a small program which is sum and miltiply numbers in mikroC.
Now I'd like to use not just the 4X4 key but the menu keypad too.
I found it that i have to use the port 3 for the menu keypad but nothing else and I didn't find functions like keypad_key_pressed, etc.
I'd like to find the way to move the cursor and use enter and cancel buttons with the menu keypad.

Pls Help me or/and send an example

Thx

[tihomir.losic]

Hello,

please, try this code (mikroC PRO for 8051, AT89S8253):

Code: Select all

unsigned short kp, cnt, oldstate = 0;
char txt[6];

// Keypad module connections
char keypadPort at P0;
// End Keypad module connections

// Lcd module connections
sbit LCD_RS at P2_0_bit;
sbit LCD_EN at P2_1_bit;

sbit LCD_D4 at P2_2_bit;
sbit LCD_D5 at P2_3_bit;
sbit LCD_D6 at P2_4_bit;
sbit LCD_D7 at P2_5_bit;
// End Lcd module connections

void main() {
  cnt = 0;                                 // Reset counter
  Keypad_Init();                           // Initialize Keypad
  Lcd_Init();                              // Initialize Lcd
  Lcd_Cmd(_LCD_CLEAR);                     // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);                // Cursor off

  Lcd_Out(1, 1, "Key  :");                 // Write message text on Lcd
  Lcd_Out(2, 1, "Times:");

  do {
    kp = 0;                                // Reset key code variable

    // Wait for key to be pressed and released
    do
      // kp = Keypad_Key_Press();          // Store key code in kp variable
      kp = Keypad_Key_Click();             // Store key code in kp variable
    while (!kp);
   // Prepare value for output, transform key to it's ASCII value
    switch (kp) {
      //case 10: kp = 42; break;  // '*'   // Uncomment this block for keypad4x3
      //case 11: kp = 48; break;  // '0'
      //case 12: kp = 35; break;  // '#'
      //default: kp += 48;

      case  1: kp = 49; break; // 1        // Uncomment this block for keypad4x4
      case  2: kp = 50; break; // 2
      case  3: kp = 51; break; // 3
      case  4: kp = 65; break; // A
      case  5: kp = 52; break; // 4
      case  6: kp = 53; break; // 5
      case  7: kp = 54; break; // 6
      case  8: kp = 66; break; // B
      case  9: kp = 55; break; // 7
      case 10: kp = 56; break; // 8
      case 11: kp = 57; break; // 9
      case 12: kp = 67; break; // C
      case 13: kp = 42; break; // *
      case 14: kp = 48; break; // 0
      case 15: kp = 35; break; // #
      case 16: kp = 68; break; // D

    }

    if (kp != oldstate) {                  // Pressed key differs from previous
      cnt = 1;
      oldstate = kp;
      }
    else {                                 // Pressed key is same as previous
      cnt++;
      }

    Lcd_Chr(1, 10, kp);                    // Print key ASCII value on Lcd

    if (cnt == 255) {                      // If counter varialble overflow
      cnt = 0;
      Lcd_Out(2, 10, "   ");
      }

    WordToStr(cnt, txt);                   // Transform counter value to string
    Lcd_Out(2, 10, txt);                   // Display counter value on Lcd
  } while (1);
}

Also, you need to pull-up PORT0.
Place all switches on P0 ON, and place jumper J1 on UPPER position.

Best regards,

Losic Tihomir

[adam1234]

Hello

Thx I made it, but i have another problem.
I can move the cursor, but when a button pressed for example 1, or A, on the keyboard, the cursor always goes back to the start position(first row) on the lcd. Is there any function which is gives me back the current position of the cursor?

Bye

[ranko.rankovic]

Hello adam1234,

Please consider Help file for more info about LCD library and our examples within compiler.

Best regards