void hd44780_wr_hi_nibble(uint8_t data) {
if (data & 0x10) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT4);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT4);
}
if (data & 0x20) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT5);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT5);
}
if (data & 0x40) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT6);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT6);
}
if (data & 0x80) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT7);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT7);
}
/* set the EN signal */hd44780_EN_On();
/* wait */hd44780_EN_high_delay();
/* reset the EN signal */
hd44780_EN_Off();
}
void hd44780_wr_lo_nibble( unsigned char data )
{
if ( data & 0x01 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT4 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT4 );
}
if ( data & 0x02 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT5 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT5 );
}
if ( data & 0x04 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT6 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT6 );
}
if ( data & 0x08 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT7 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT7 );
}
/* set the EN signal */
hd44780_EN_On();
/* wait */
hd44780_EN_high_delay();
/* reset the EN signal */
hd44780_EN_Off();
}
void hd44780_init(void) {
while (buttons_active) {}
hd44780_active=1;
controlLEDs_enable(0);
/* clear control bits */
hd44780_EN_Off();
hd44780_RS_Off();
// hd44780_RW_Off();
/* sets the configured values - can be set again only after reset */
hd44780_function( HD44780_CONF_BUS, HD44780_CONF_LINES, HD44780_CONF_FONT, HD44780_FONT_TABLE);
/* turn the display off with no cursor or blinking */
hd44780_display( HD44780_DISP_OFF, HD44780_DISP_CURS_OFF, HD44780_DISP_BLINK_OFF);
/* clear the display */
hd44780_clear();
/* addr increment, shift cursor */
hd44780_entry( HD44780_ENTRY_SHIFT_CURS, HD44780_ENTRY_ADDR_INC);
hd44780_load_symbol(0x0, symbol_menu_pointer);
hd44780_load_symbol(0x8, symbol_check);
/*cursor to zero position*/
hd44780_ddram_addr(0);
hd44780_active=0;
controlLEDs_enable(1);
}
void hd44780_wr_lo_nibble( unsigned char data )
{
if ( data & 0x01 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT4,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT4,GPIO_PIN_RESET);
}
if ( data & 0x02 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT5,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT5,GPIO_PIN_RESET);
}
if ( data & 0x04 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT6,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT6,GPIO_PIN_RESET);
}
if ( data & 0x08 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT7,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT7,GPIO_PIN_RESET);
}
/* set the EN signal */
hd44780_EN_On();
/* wait */
hd44780_EN_high_delay();
/* reset the EN signal */
hd44780_EN_Off();
}
void hd44780_wr_hi_nibble( unsigned char data )
{
if ( data & 0x10 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT4,GPIO_PIN_SET);
//GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT4 );
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT4,GPIO_PIN_RESET);
}
if ( data & 0x20 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT5,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT5,GPIO_PIN_RESET);
}
if ( data & 0x40 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT6,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT6,GPIO_PIN_RESET);
}
if ( data & 0x80 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT7,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT7,GPIO_PIN_RESET);
}
/* set the EN signal */
hd44780_EN_On();
/* wait */
hd44780_EN_high_delay();
/* reset the EN signal */
hd44780_EN_Off();
}
/*********************************************************************************************
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 );
}
/* 8bit bus version */
void hd44780_write( unsigned char data )
{
/* set the data bits */
if ( data & 0x01 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT0 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT0 );
}
if ( data & 0x02 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT1 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT1 );
}
if ( data & 0x04 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT2 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT2 );
}
if ( data & 0x08 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT3 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT3 );
}
if ( data & 0x10 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT4 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT4 );
}
if ( data & 0x20 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT5 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT5 );
}
if ( data & 0x40 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT6 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT6 );
}
if ( data & 0x80 ) {
GPIO_SetBits( HD44780_DATAPORT, HD44780_DATABIT7 );
} else {
GPIO_ResetBits( HD44780_DATAPORT, HD44780_DATABIT7 );
}
/* tell the lcd that we have a command to read in */
hd44780_EN_On();
/* wait long enough so that the lcd can see the command */
hd44780_EN_high_delay();
/* reset the ce line */
hd44780_EN_Off();
hd44780_init_end_delay();
}
/* 8bit bus version */
void hd44780_write( unsigned char data )
{
/* set the data bits */
if ( data & 0x01 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT0,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT0,GPIO_PIN_RESET);
}
if ( data & 0x02 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT1,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT1,GPIO_PIN_RESET);
}
if ( data & 0x04 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT2,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT2,GPIO_PIN_RESET);
}
if ( data & 0x08 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT3,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT3,GPIO_PIN_RESET);
}
if ( data & 0x10 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT4,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT4,GPIO_PIN_RESET);
}
if ( data & 0x20 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT5,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT5,GPIO_PIN_RESET);
}
if ( data & 0x40 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT6,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT6,GPIO_PIN_RESET);
}
if ( data & 0x80 ) {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT7,GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(HD44780_DATAPORT, HD44780_DATABIT7,GPIO_PIN_RESET);
}
/* tell the lcd that we have a command to read in */
hd44780_EN_On();
/* wait long enough so that the lcd can see the command */
hd44780_EN_high_delay();
/* reset the ce line */
hd44780_EN_Off();
hd44780_init_end_delay();
}
void hd44780_write(uint8_t data) {
while (buttons_active){
}
hd44780_active=1;
controlLEDs_enable(0);
/* set the data bits */
uint16_t dataportValue = HD44780_DATAPORT->IDR;
HD44780_DATAPORT->ODR = (dataportValue & 0xFF00) + data; //In the current project the display uses PE0-PE7 GPIO, so it is possible to switch them by one command
/*
if (data & 0x01) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT0);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT0);
}
if (data & 0x02) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT1);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT1);
}
if (data & 0x04) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT2);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT2);
}
if (data & 0x08) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT3);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT3);
}
if (data & 0x10) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT4);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT4);
}
if (data & 0x20) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT5);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT5);
}
if (data & 0x40) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT6);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT6);
}
if (data & 0x80) {
GPIO_SetBits(HD44780_DATAPORT, HD44780_DATABIT7);
} else {
GPIO_ResetBits(HD44780_DATAPORT, HD44780_DATABIT7);
}
*/
/* tell the lcd that we have a command to read in */hd44780_EN_On();
/* wait long enough so that the lcd can see the command */hd44780_EN_high_delay();
/* reset the ce line */hd44780_EN_Off();
hd44780_init_end_delay();
hd44780_active=0;
controlLEDs_enable(1);
}
