summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/sound/lc7535.h
blob: 7b58f48ba376af5511a474a6cb4d07537503860e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
// license: BSD-3-Clause
// copyright-holders: Dirk Best
/***************************************************************************

    Sanyo LC7535

    Electronic Volume/Loudness Control with Serial Data Control

              ___ ___
   L5dBIN  1 |*  u   | 22  R5dBIN
     LCT1  2 |       | 21  RCT1
     LCT2  3 |       | 20  RCT2
  L5dBOUT  4 |       | 19  R5dBOUT
   L1dBIN  5 |       | 18  R1dBIN
  L1dBOUT  6 |LC7535P| 17  R1dBOUT
      LVM  7 |       | 16  RVM
      VEE  8 |       | 16  VCC
        S  9 |       | 14  CE
      VDD 10 |       | 13  DI
      VSS 11 |_______| 12  CLK

***************************************************************************/

#ifndef MAME_SOUND_LC7535_H
#define MAME_SOUND_LC7535_H

#pragma once


//**************************************************************************
//  INTERFACE CONFIGURATION MACROS
//**************************************************************************

#define MCFG_LC7535_SELECT_CB(_read) \
	downcast<lc7535_device &>(*device).set_select_callback(DEVCB_##_read);

#define MCFG_LC7535_VOLUME_CB(_class, _method) \
	downcast<lc7535_device &>(*device).set_volume_callback(lc7535_device::volume_delegate(&_class::_method, #_class "::" #_method, this));

#define LC7535_VOLUME_CHANGED(name) void name(int attenuation_right, int attenuation_left, bool loudness)


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

class lc7535_device : public device_t
{
public:
	// construction/destruction
	lc7535_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);

	typedef device_delegate<void (int attenuation_right, int attenuation_left, bool loudness)> volume_delegate;

	template <typename Object> void set_volume_callback(Object &&cb) { m_volume_cb = std::forward<Object>(cb); }

	template <class Object> devcb_base &set_select_callback(Object &&cb) { return m_select_cb.set_callback(std::forward<Object>(cb)); }

	// serial interface
	DECLARE_WRITE_LINE_MEMBER( ce_w );
	DECLARE_WRITE_LINE_MEMBER( di_w );
	DECLARE_WRITE_LINE_MEMBER( clk_w );

	float normalize(int attenuation);

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

private:
	// maximum attenuation is -98 dB for infinity
	enum { MAX = -98 };

	static constexpr int m_5db[16] = { -75, -70, -65, -60, -55, -50, -45, -40, -35, -30, -25, -20, -15, -10, -5, -0 };
	static constexpr int m_1db[8] = { MAX, MAX, -4, -3, -2, -1, 0, MAX };

	// callbacks
	devcb_read_line m_select_cb;
	volume_delegate m_volume_cb;

	// state
	uint8_t m_addr;
	uint16_t m_data;
	int m_count, m_ce, m_di, m_clk;
};

// device type definition
DECLARE_DEVICE_TYPE(LC7535, lc7535_device)

#endif // MAME_SOUND_LC7535_H