/*================================================*/
void lcd_put_command(char byte_wr_cmd) // Write a command to the LCD.
{
lcdbusywait(); // Is the LCD ready to take the command?
LCD_RS = COMMAND_RS; // Register Select Low for writing command
LCD_RW = WRITE_RW; // R!W low for write
LCD_DATA_PTR = byte_wr_cmd; // Command byte to register
LCD_RS = COMMAND_RS;
LCD_RW = READ_RW;
}
/*=============================================*/
void lcdgotoaddr (unsigned char ddram_add)
{
if(ddram_add < 0x80)
{
lcdbusywait();
lcd_put_command(LCDHOME + ddram_add);
cursor_position = LCDHOME + ddram_add;
}
}
/*=============================================*/
void lcdputch(char byte_wr) // Write a character to the LCD.
{
lcdbusywait(); // Is the LCD ready to take the command?
LCD_RS = DATA_RS; // Register Select High for writing data
LCD_RW = WRITE_RW; // R!W low for write
LCD_DATA_PTR = byte_wr; // Data byte to data port
switch (cursor_position)
{
case LINE_0_END:
{
lcd_put_command(LINE_1_START);
cursor_position = LINE_1_START;
break;
}
case LINE_1_END:
{
lcd_put_command(LINE_2_START);
cursor_position = LINE_2_START;
break;
}
case LINE_2_END:
{
lcd_put_command(LINE_3_START);
cursor_position = LINE_3_START;
break;
}
case LINE_3_END:
{
lcd_put_command(LINE_0_START);
cursor_position = LINE_0_START;
break;
}
default:
{
cursor_position++;
break;
}
}
//printf("cursor_position = %x\n\r", cursor_position);
LCD_RS = COMMAND_RS;
LCD_RW = READ_RW;
}
void
lcdctrl(int cc)
{
struct pio *p1 = (struct pio *)0x4D000000;
int s;
lcdbusywait();
s = splhigh();
p1->cntrl = PIO1_MODE_OUTPUT;
p1->portC = POWER | WRITE_CMD | ENABLE;
p1->portA = cc;
p1->portC = POWER | WRITE_CMD | DISABLE;
splx(s);
}
