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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol, hap
/*
Hughes HLCD 0488 LCD Driver
*/
#ifndef MAME_VIDEO_HLCD0488_H
#define MAME_VIDEO_HLCD0488_H
#pragma once
// pinout reference
/*
____ ____
ROW 4 1 |* \_/ | 40 VDD
ROW 5 2 | | 39 ROW 1
ROW 6 3 | | 38 ROW 2
/DATA CLK 4 | | 37 ROW 3
LATCH PULSE 5 | | 36 COL 1
DATA 0 6 | | 35 COL 2
DATA 1 7 | | 34 COL 3
DATA 2 8 | | 33 COL 4
DATA 3 9 | | 32 COL 5
ROW 16 10 | HLCD 0488 | 31 COL 6
ROW 15 11 | | 30 COL 7
ROW 14 12 | | 29 COL 8
ROW 13 13 | | 28 COL 9
ROW 12 14 | | 27 COL 10
ROW 11 15 | | 26 COL 11
ROW 10 16 | | 25 COL 12
ROW 9 17 | | 24 COL 13
ROW 8 18 | | 23 COL 14
ROW 7 19 | | 22 COL 15
GND 20 |___________| 21 COL 16
*/
class hlcd0488_device : public device_t
{
public:
hlcd0488_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
// configuration helpers
auto write_cols() { return m_write_cols.bind(); } // COL pins in data, ROW pins in offset
DECLARE_WRITE_LINE_MEMBER(latch_pulse_w);
DECLARE_WRITE_LINE_MEMBER(data_clk_w);
void data_w(u8 data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param) override;
private:
// pin state
int m_latch_pulse = 0;
int m_latch_pulse_prev = 0;
int m_data_clk = 0;
int m_data_clk_prev = 0;
u8 m_data = 0;
u8 m_count = 0;
u8 m_latch[8];
u8 m_hold[8];
emu_timer *m_sync_timer;
devcb_write16 m_write_cols;
};
DECLARE_DEVICE_TYPE(HLCD0488, hlcd0488_device)
#endif // MAME_VIDEO_HLCD0488_H
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