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https://github.com/holub/mame
synced 2025-06-06 04:43:45 +03:00
New device: UPD7004 ADC
This commit is contained in:
Dirk Best
parent
9863c37e28
commit
244b03bb52
@ -2927,6 +2927,18 @@ if (MACHINES["UPD7002"]~=null) then
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/upd7004.h,MACHINES["UPD7004"] = true
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---------------------------------------------------
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if (MACHINES["UPD7004"]~=null) then
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files {
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MAME_DIR .. "src/devices/machine/upd7004.cpp",
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MAME_DIR .. "src/devices/machine/upd7004.h",
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/upd71071.h,MACHINES["UPD71071"] = true
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@ -609,6 +609,7 @@ MACHINES["UPD1990A"] = true
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MACHINES["UPD4992"] = true
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MACHINES["UPD4701"] = true
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MACHINES["UPD7002"] = true
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MACHINES["UPD7004"] = true
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MACHINES["UPD71071"] = true
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MACHINES["UPD765"] = true
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MACHINES["FDC_PLL"] = true
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@ -628,6 +628,7 @@ MACHINES["UPD1990A"] = true
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--MACHINES["UPD4992"] = true
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MACHINES["UPD4701"] = true
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MACHINES["UPD7002"] = true
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--MACHINES["UPD7004"] = true
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MACHINES["UPD71071"] = true
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MACHINES["UPD765"] = true
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MACHINES["FDC_PLL"] = true
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171
src/devices/machine/upd7004.cpp
Normal file
171
src/devices/machine/upd7004.cpp
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@ -0,0 +1,171 @@
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// license: BSD-3-Clause
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// copyright-holders: Dirk Best
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/***************************************************************************
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µPD7004
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10-bit 8 Channel A/D Converter
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TODO:
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- Serial modes
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- 2s complement output
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***************************************************************************/
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#include "emu.h"
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#include "upd7004.h"
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#define VERBOSE 0
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#include "logmacro.h"
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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DEFINE_DEVICE_TYPE(UPD7004, upd7004_device, "upd7004", "UPD7004 A/D Converter")
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// permit our enum to be saved
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ALLOW_SAVE_TYPE(upd7004_device::state);
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// upd7004_device - constructor
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//-------------------------------------------------
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upd7004_device::upd7004_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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device_t(mconfig, UPD7004, tag, owner, clock),
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m_eoc_cb(*this), m_eoc_ff_cb(*this),
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m_in_cb{ {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this} },
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m_state(STATE_IDLE),
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m_cycle_timer(nullptr),
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m_div(1), m_code(false), m_address(0), m_sar(0x3ff)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void upd7004_device::device_start()
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{
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// resolve callbacks
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m_eoc_cb.resolve_safe();
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m_eoc_ff_cb.resolve_safe();
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for (int i = 0; i < 8; i++)
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m_in_cb[i].resolve_safe(0x3ff);
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// allocate timers
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m_cycle_timer = timer_alloc();
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m_cycle_timer->adjust(attotime::never);
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// register for save states
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save_item(NAME(m_state));
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save_item(NAME(m_div));
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save_item(NAME(m_code));
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save_item(NAME(m_address));
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save_item(NAME(m_sar));
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}
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//-------------------------------------------------
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// device_timer - handler timer events
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//-------------------------------------------------
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void upd7004_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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switch (m_state)
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{
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case STATE_IDLE:
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m_cycle_timer->adjust(attotime::never);
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break;
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case STATE_CONVERSION_START:
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m_sar = m_in_cb[m_address](0);
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// the conversion takes 96 to 104 cycles
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m_state = STATE_CONVERSION_DONE;
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m_cycle_timer->adjust(attotime::from_ticks(100, clock() / m_div));
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break;
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case STATE_CONVERSION_DONE:
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{
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// set eoc
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m_eoc_cb(1);
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m_eoc_ff_cb(1);
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m_state = STATE_IDLE;
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m_cycle_timer->adjust(attotime::never);
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LOG("Conversion finished, result: %03x\n", m_sar);
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break;
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}
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}
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}
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//**************************************************************************
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// INTERFACE
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//**************************************************************************
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READ8_MEMBER(upd7004_device::read)
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{
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uint8_t data = 0xff;
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// connected to a flip-flop, cleared on read
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m_eoc_ff_cb(0);
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switch (offset)
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{
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case 0:
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// low-byte data output
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data = (m_sar & 0x03) << 6;
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break;
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case 1:
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// high-byte data output
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data = (m_sar >> 2) & 0xff;
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break;
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}
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return data;
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}
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WRITE8_MEMBER(upd7004_device::write)
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{
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switch (offset)
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{
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case 0:
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// address set
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m_address = data & 0x07;
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// reset eoc
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m_eoc_cb(0);
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// start conversion timer
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m_state = STATE_CONVERSION_START;
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m_cycle_timer->adjust(attotime::from_hz(clock() / m_div));
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LOG("Select address %d\n", m_address);
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break;
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case 1:
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// initialize
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m_div = 1 << (data & 0x03);
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m_code = data & 0x04;
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logerror("Initialize with clock division ratio %d, %s data\n", m_div, m_code ? "2s complement" : "binary");
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if (m_code)
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logerror("Warning: 2s complement data unimplemented\n");
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break;
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}
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}
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80
src/devices/machine/upd7004.h
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80
src/devices/machine/upd7004.h
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@ -0,0 +1,80 @@
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// license: BSD-3-Clause
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// copyright-holders: Dirk Best
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/***************************************************************************
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µPD7004
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10-bit 8 Channel A/D Converter
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___ ___
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CH4 1 |* u | 28 CH3
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CH5 2 | | 27 CH2
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CH6 3 | | 26 CH1
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CH7 4 | | 25 CH0
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VREF 5 | | 24 AGND
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DGND 6 | | 23 AVDD
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DB7/SO 7 | | 22 CS
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DB6/SI 8 | | 21 RD/SCKI
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DB5/SHIFT 9 | | 20 A0
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DB4/SCKO 10 | | 19 WR/STB
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DB3/SOEN 11 | | 18 MC
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DB2/CODE 12 | | 17 CLOCK
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DB1/DEV1 13 | | 16 EOC
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DB0/DEV0 14 |_______| 15 DVDD
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***************************************************************************/
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#ifndef MAME_DEVICES_MACHINE_UPD7004_H
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#define MAME_DEVICES_MACHINE_UPD7004_H
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#pragma once
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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class upd7004_device : public device_t
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{
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public:
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// construction/destruction
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upd7004_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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auto eoc_callback() { return m_eoc_cb.bind(); }
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auto eoc_ff_callback() { return m_eoc_ff_cb.bind(); }
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template <int N> auto in_callback() { return m_in_cb[N].bind(); }
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DECLARE_READ8_MEMBER(read);
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DECLARE_WRITE8_MEMBER(write);
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// device-level overrides
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virtual void device_start() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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private:
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// callbacks
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devcb_write_line m_eoc_cb;
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devcb_write_line m_eoc_ff_cb;
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devcb_read16 m_in_cb[8];
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enum state : int
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{
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STATE_IDLE,
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STATE_CONVERSION_START,
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STATE_CONVERSION_DONE
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};
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state m_state;
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emu_timer *m_cycle_timer;
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// state
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int m_div;
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bool m_code;
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int m_address;
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uint16_t m_sar;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(UPD7004, upd7004_device)
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#endif // MAME_DEVICES_MACHINE_UPD7004_H
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