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// license:BSD-3-Clause
// copyright-holders: AJR
/**********************************************************************
OKI MSM6253 8-Bit 4-Channel A/D Converter
***********************************************************************
____ ____
/OSC OUT 1 |* \_/ | 18 OSC OUT
D-GND 2 | | 17 OSC IN
A-GND 3 | | 16 /RD
IN0 4 | | 15 /WR
IN1 5 | MSM6253RS | 14 ALE
IN2 6 | | 13 /CS
IN3 7 | | 12 A1
Vr 8 | | 11 A0
Vdd 9 |___________| 10 S.O.
**********************************************************************/
#ifndef MAME_MACHINE_MSM6253_H
#define MAME_MACHINE_MSM6253_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> msm6253_device
class msm6253_device : public device_t
{
public:
typedef device_delegate<ioport_value ()> port_read_delegate;
// construction/destruction
msm6253_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
// configuration
template <unsigned P> void set_input_tag(const char *tag) { m_analog_ports[P].set_tag(tag); }
template <unsigned P, typename... T> void set_input_cb(T &&... args) { m_analog_input_cb[P].set(std::forward<T>(args)...); }
// write handlers
WRITE8_MEMBER(address_w);
WRITE8_MEMBER(select_w);
// read handlers
bool shift_out();
READ8_MEMBER(d0_r);
READ8_MEMBER(d7_r);
protected:
// device-level overrides
virtual void device_start() override;
private:
// helpers
template<int port> ioport_value port_read();
// input configuration
optional_ioport_array<4> m_analog_ports;
port_read_delegate::array<4> m_analog_input_cb;
// private data
u8 m_shift_register;
};
// device type definition
DECLARE_DEVICE_TYPE(MSM6253, msm6253_device)
#endif // DEVICES_MACHINE_MSM6253_H
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