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// license:BSD-3-Clause
// copyright-holders:Angelo Salese
#include "emu.h"
#include "tms3631.h"
#define LIVE_AUDIO_VIEW 0
//#define VERBOSE 1
#include "logmacro.h"
#include <cstring>
DEFINE_DEVICE_TYPE(TMS3631, tms3631_device, "tms3631", "TMS3631")
tms3631_device::tms3631_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, TMS3631, tag, owner, clock)
, device_sound_interface(mconfig, *this)
, m_stream(nullptr)
, m_samplerate(0)
, m_basefreq(0)
, m_enable(0)
{
// std::fill(std::begin(m_counter8), std::end(m_counter8), 0);
std::fill(std::begin(m_channel_data), std::end(m_channel_data), 0);
}
void tms3631_device::device_start()
{
m_stream = stream_alloc(0, 8, clock() / 8);
m_samplerate = clock() / 8;
m_basefreq = clock();
}
//-------------------------------------------------
// sound_stream_update - handle a stream update
//-------------------------------------------------
void tms3631_device::sound_stream_update(sound_stream &stream)
{
// int samplerate = stream.sample_rate();
for (int i = 0; i < 8; i++)
stream.fill(i, 0);
}
// TODO: external to the chip(s)?
void tms3631_device::enable_w(offs_t offset, u8 data)
{
if (offset)
popmessage("TMS3631: select with offset (RI105?)");
m_enable = data;
}
void tms3631_device::data_w(u8 data)
{
const int ce_state = BIT(data, 7);
if (!m_ce && ce_state)
{
m_program_enable = true;
m_channel_select = 0;
}
else if (m_ce && !ce_state)
{
m_program_enable = false;
}
if (m_program_enable)
{
const int wclk_state = BIT(data, 6);
if (!m_wclk && wclk_state)
{
m_channel_data[m_channel_select] = data & 0x3f;
m_stream->update();
if (LIVE_AUDIO_VIEW)
popmessage(print_audio_state());
}
else if (m_wclk && !wclk_state)
{
m_channel_select ++;
m_channel_select &= 7;
}
m_wclk = wclk_state;
}
m_ce = ce_state;
}
std::string tms3631_device::print_audio_state()
{
std::ostringstream outbuffer;
for (int i = 0; i < 8; i++)
{
util::stream_format(outbuffer, "%02x ", m_channel_data[i]);
}
return outbuffer.str();
}
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