/*********************************************************************************************
Function name : HD44780_Init
Author : Grant Phillips
Date Modified : 16/10/2013
Compiler : Keil ARM-MDK (uVision V4.70.0.0)
Description : Initializes the HD44780 lcd module
Special Note(s) : NONE
Parameters : NONE
Return value : NONE
*********************************************************************************************/
void HD44780_Init(void)
{
//GPIO Initialization
GPIO_InitTypeDef GPIO_InitStruct;
/* Configure the peripheral clocks for the HD44780 data and control lines */
//RCC_AHBPeriphClockCmd(HD44780_RCC_AHBPeriph, ENABLE);
__GPIOC_CLK_ENABLE();
/* Configure the HD44780 Data lines (DB7 - DB4) as outputs*/
GPIO_InitStruct.Pin = HD44780_DATABIT7 | HD44780_DATABIT6 | HD44780_DATABIT5 | HD44780_DATABIT4;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = 0;
HAL_GPIO_Init(HD44780_DATAPORT, &GPIO_InitStruct);
/* Configure the HD44780 Control lines (RS, RW, EN) as outputs*/
GPIO_InitStruct.Pin = HD44780_RS_BIT | HD44780_RW_BIT | HD44780_EN_BIT;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = 0;
HAL_GPIO_Init(HD44780_DATAPORT, &GPIO_InitStruct);
/* clear control bits */
hd44780_EN_Off();
hd44780_RS_Off();
hd44780_RW_Off();
/* wait initial delay for LCD to settle */
/* reset procedure - 3 function calls resets the device */
hd44780_init_delay();
hd44780_wr_hi_nibble( HD44780_CMD_RESET );
hd44780_init_delay2();
hd44780_wr_hi_nibble( HD44780_CMD_RESET );
hd44780_init_delay3();
hd44780_wr_hi_nibble( HD44780_CMD_RESET );
#if HD44780_CONF_BUS == HD44780_FUNC_BUS_4BIT
/* 4bit interface */
hd44780_wr_hi_nibble( HD44780_CMD_FUNCTION );
#endif /* HD44780_CONF_BUS == HD44780_FUNC_BUS_4BIT */
/* sets the configured values - can be set again only after reset */
hd44780_function( HD44780_CONF_BUS, HD44780_CONF_LINES, HD44780_CONF_FONT );
/* turn the display on with no cursor or blinking */
hd44780_display( HD44780_DISP_ON, HD44780_DISP_CURS_OFF, HD44780_DISP_BLINK_OFF );
/* clear the display */
hd44780_clear();
/* addr increment, shift cursor */
hd44780_entry( HD44780_ENTRY_ADDR_INC, HD44780_ENTRY_SHIFT_CURS );
}
/* 4bit bus version */
void hd44780_write( unsigned char data )
{
/* send the data bits - high nibble first */
hd44780_wr_hi_nibble( data );
hd44780_wr_lo_nibble( data );
}
