Texas Instruments MSP430 - Page 332

332
LCD_send((cursor_direction_inc | display_no_shift), CMD);
}
void LCD_send(unsigned char value, unsigned char control_type)
{
switch(control_type)
{
case CMD:
{
data_value &= 0xF4;
break;
}
case DAT:
{
data_value |= 0x01;
break;
}
}
switch(bl_state)
{
case BL_ON:
{
data_value |= 0x08;
break;
}
case BL_OFF:
{
data_value &= 0xF7;
break;
}
}
PCF8574_write(data_value);
LCD_4bit_send(value);
delay_ms(10);
}
void LCD_4bit_send(unsigned char lcd_data)
{
unsigned char temp = 0x00;
temp = (lcd_data & 0xF0);
data_value &= 0x0F;
data_value |= temp;
PCF8574_write(data_value);
data_value |= 0x04;
PCF8574_write(data_value);
delay_ms(dly);
data_value &= 0xF9;
PCF8574_write(data_value);
delay_ms(dly);
temp = (lcd_data & 0x0F);
temp <<= 0x04;
data_value &= 0x0F;