//**************************************************************************
//* LCD initialization
//**************************************************************************
//* Calling arguments:
//* char mode1 : display mode (number of lines and character size)
//* char mode2 : display mode (cursor and display state)
//**************************************************************************
void LCD_init(char mode1, char mode2)
{
char aux;
// Configure the pins as outputs
LCD_ENABLE_DIR = 1;
LCD_RS_DIR = 1;
LCD_D4_DIR = 1;
LCD_D5_DIR = 1;
LCD_D6_DIR = 1;
LCD_D7_DIR = 1;
// Set the LCD data pins to zero
LCD_D4 = 0;
LCD_D5 = 0;
LCD_D6 = 0;
LCD_D7 = 0;
LCD_RS = 0;
LCD_ENABLE = 0; // LCD enable = 0
LCD_delay_ms(15);
// LCD 4-bit mode initialization sequence
// send three times 0x03 and then 0x02 to finish configuring the LCD
for(aux=0;aux<3;++aux)
{
LCD_send_nibble(3);
LCD_delay_ms(5);
}
LCD_send_nibble(2);
// Now send the LCD configuration data
LCD_send_byte(0,0x20 | mode1);
LCD_send_byte(0,0x08 | mode2);
lcd_mode = 0x08 | mode2;
LCD_send_byte(0,1);
LCD_send_byte(0,6);
}
//**************************************************************************
//* Write a byte into the LCD
//**************************************************************************
//* Calling arguments:
//* char address : 0 for instructions, 1 for data
//* char data : command or data to be written
//**************************************************************************
void LCD_send_byte(char address, char data)
{
unsigned int temp;
LCD_RS = address; // config the R/S line
LCD_ENABLE = 0; // set LCD enable line to 0
LCD_send_nibble(data >> 4); // send the higher nibble
LCD_send_nibble(data & 0x0f); // send the lower nibble
for (temp=1000; temp; temp--);
}
void LCD_init(char mode1, char mode2)
{
char aux;
//SIM_SCGC5 |= SIM_SCGC5_PORTA_MASK | SIM_SCGC5_PORTB_MASK; // enable clock to Port A and Port B
PORTA_PCR8 = PORT_PCR_MUX(1); // PTA8 GPIO
PORTA_PCR9 = PORT_PCR_MUX(1); // PTA9 GPIO
PORTA_PCR11 = PORT_PCR_MUX(1); // PTA11 GPIO
PORTB_PCR4 = PORT_PCR_MUX(1); // PTB4 GPIO
PORTA_PCR12 = PORT_PCR_MUX(1); // PTA12 GPIO
PORTB_PCR12 = PORT_PCR_MUX(1); // PTB12 GPIO
//PORTA_PCR13 = PORT_PCR_MUX(1); // PTA13 GPIO
GPIOA_PDDR |= LCD_ENABLE|LCD_RS|LCD_D4|LCD_D6/*|LCD_D7*/;
GPIOB_PDDR |= LCD_D5|LCD_D7;
// Set the LCD data pins to zero
LCD_ENABLE_OFF;
LCD_RS_OFF;
LCD_D4_OFF;
LCD_D5_OFF;
LCD_D6_OFF;
LCD_D7_OFF;
time_delay_ms(50); //Secuencia de inicializacion
// LCD 4-bit mode initialization sequence
// send three times 0x03 and then 0x02 to finish configuring the LCD
for(aux=0;aux<3;++aux)
{
LCD_send_nibble(3);
time_delay_ms(5);
}
LCD_send_nibble(2);
// Now send the LCD configuration data
LCD_send_byte(0,0x20 | mode1);
LCD_send_byte(0,0x08 | mode2);
lcd_mode = 0x08 | mode2;
LCD_send_byte(0,1);
LCD_send_byte(0,6);
}
//**************************************************************************
//* Write a byte into the LCD
//**************************************************************************
//* Calling arguments:
//* char address : 0 for instructions, 1 for data
//* char data : command or data to be written
//**************************************************************************
void LCD_send_byte(char address, char data)
{
if (address == 1)
{
LCD_RS_ON;
} else
{
LCD_RS_OFF;
}
LCD_ENABLE_OFF; // set LCD enable line to 0
LCD_send_nibble(data >> 4); // send the higher nibble
LCD_send_nibble(data & 0x0f); // send the lower nibble
time_delay_ms(6);
}
