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// 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
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
#define LC7535_VOLUME_CHANGED(name) void name(int attenuation_right, int attenuation_left, bool loudness)
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;
auto select() { return m_select_cb.bind(); }
void set_volume_callback(volume_delegate callback) { m_volume_cb = callback; }
template <class FunctionClass> void set_volume_callback(const char *devname, void (FunctionClass::*callback)(int, int, bool), const char *name)
{
set_volume_callback(volume_delegate(callback, name, devname, static_cast<FunctionClass *>(nullptr)));
}
template <class FunctionClass> void set_volume_callback(void (FunctionClass::*callback)(int, int, bool), const char *name)
{
set_volume_callback(volume_delegate(callback, name, nullptr, static_cast<FunctionClass *>(nullptr)));
}
// 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
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