Character LCD ( Help !)

[leventeyigel52]

Posted on January 17, 2012 at 16:34

Hi,

I'm using STM32 F103 microcontroller and 2x16 character lcd.I want to  display strings on it.(HD 44780 driver)I'm new on ARM microcontrollers and i couldn't find a demo project for this lcd.Who can help me about it ?Is there any demo project  in this site ? Can you give me a link or adress ? #character-lcd

[joesoftware]

Posted on November 07, 2012 at 21:35

it doesn't work :(

I have some warning 1 is in this function:

/*************************************************************************

 * Function Name: HD44780WrIO  * Parameters: Int32U Data  * Return: none  * Description: Write to HD44780 I/O  *  *************************************************************************/ void HD44780WrIO (Int32U Data) {   // Write Data #if HD4780_WR > 0 GPIO_InitTypeDef  GPIO_InitStructure;   HD44780SetRW(0);

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  

GPIO_InitStructure.GPIO_Pin = LCD_DATA << LCD_DATA_SHIFT;

  GPIO_Init(LCD_DATA_PORT, &GPIO_InitStructure); #endif

  HD44780SetE(1);

  LCD_DATA_PORT->BSRR = (  Data  & 0xF) << LCD_DATA_SHIFT;   LCD_DATA_PORT->BRR  = ((~Data) & 0xF) << LCD_DATA_SHIFT;   HD44780_BUS_DLY();   HD44780SetE(0); }

#if HD4780_WR > 0

Warning says Warning[Pe069]: integer conversion resulted in truncation. Damned display.

[Tesla DeLorean]

Posted on November 08, 2012 at 01:34

Ok, so leave

#define LCD_DATA 0x0FUL

[joesoftware]

Posted on November 08, 2012 at 09:59

ok with this compile without error. But the display show nothing.