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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Sprow LCD Display
http://www.sprow.co.uk/bbc/buildit.htm#Lcddisplay
**********************************************************************/
#include "emu.h"
#include "lcd.h"
#include "screen.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(BBC_LCD, bbc_lcd_device, "bbc_lcd", "Sprow LCD Display")
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void bbc_lcd_device::device_add_mconfig(machine_config &config)
{
auto &screen = SCREEN(config, "screen", SCREEN_TYPE_LCD);
screen.set_refresh_hz(50);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500));
screen.set_size(120, 36);
screen.set_visarea_full();
screen.set_screen_update(m_lcdc, FUNC(hd44780_device::screen_update));
screen.set_palette("palette");
PALETTE(config, "palette", FUNC(bbc_lcd_device::lcd_palette), 3);
HD44780(config, m_lcdc);
m_lcdc->set_lcd_size(4, 20);
m_lcdc->set_pixel_update_cb(FUNC(bbc_lcd_device::lcd_pixel_update));
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// bbc_lcd_device - constructor
//-------------------------------------------------
bbc_lcd_device::bbc_lcd_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: device_t(mconfig, BBC_LCD, tag, owner, clock)
, device_bbc_userport_interface(mconfig, *this)
, m_lcdc(*this, "lcdc")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void bbc_lcd_device::device_start()
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
HD44780_PIXEL_UPDATE(bbc_lcd_device::lcd_pixel_update)
{
// char size is 5x8
if (x > 4 || y > 7)
return;
if (pos < 40)
{
if (pos >= 20)
{
line += 2;
pos -= 20;
}
if (line < 4)
bitmap.pix(line * (8 + 1) + y, pos * 6 + x) = state ? 1 : 2;
}
}
void bbc_lcd_device::lcd_palette(palette_device &palette) const
{
palette.set_pen_color(0, rgb_t(138, 146, 148)); // background
palette.set_pen_color(1, rgb_t( 92, 83, 88)); // lcd pixel on
palette.set_pen_color(2, rgb_t(131, 136, 139)); // lcd pixel off
}
uint8_t bbc_lcd_device::pb_r()
{
return m_lcdc->db_r() >> 1;
}
void bbc_lcd_device::pb_w(uint8_t data)
{
m_lcdc->rs_w(BIT(data, 0));
m_lcdc->rw_w(BIT(data, 1));
m_lcdc->e_w(BIT(data, 2));
m_lcdc->db_w(data << 1);
}
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