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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/*
* te7774 - Tokyo Electron quad UART
*/
#ifndef MAME_MACHINE_TE7774_H
#define MAME_MACHINE_TE7774_H
#pragma once
#include "diserial.h"
#include <queue>
// forward declaration
class te7774_device;
class te7774_channel : public device_t, public device_serial_interface
{
public:
te7774_channel(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override ATTR_COLD;
virtual void device_reset() override ATTR_COLD;
// device_serial overrides
virtual void rcv_complete() override;
virtual void tra_complete() override;
virtual void tra_callback() override;
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
void set_channel(int ch) { m_ch = ch; }
private:
// receiver state
bool m_rx_enabled;
// transmitter state
uint8_t m_tx_data, m_rx_data;
uint8_t m_control1, m_control2, m_control3;
uint8_t m_status;
bool m_tx_data_in_buffer;
bool m_tx_enabled;
// channel global
int m_ch;
te7774_device *m_parent;
};
class te7774_device : public device_t
{
friend class te7774_channel;
public:
// construction/destruction
te7774_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// configuration helpers
template <int ch> auto rxrdy_handler() { return m_rxrdy_handler[ch].bind(); }
template <int ch> auto txrdy_handler() { return m_txrdy_handler[ch].bind(); }
template <int ch> auto txd_handler() { return m_txd_handler[ch].bind(); }
template <int ch> void rx_w(int state);
// this chip has 4 chip selects, one per channel.
template <int ch> uint8_t read_cs(offs_t offset);
template <int ch> void write_cs(offs_t offset, uint8_t data);
protected:
virtual void device_start() override ATTR_COLD;
virtual void device_reset() override ATTR_COLD;
virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
devcb_write_line m_rxrdy_handler[4], m_txrdy_handler[4];
devcb_write_line m_txd_handler[4];
private:
required_device_array<te7774_channel, 4> m_channels;
devcb_read_line m_rxd_handler[4];
};
DECLARE_DEVICE_TYPE(TE7774, te7774_device)
DECLARE_DEVICE_TYPE(TE7774_CHANNEL, te7774_channel)
#endif // MAME_MACHINE_TE7774_H
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