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author Dirk Best <mail@dirk-best.de>2019-05-28 09:23:26 +0200
committer Dirk Best <mail@dirk-best.de>2019-05-28 09:48:59 +0200
commit244b03bb52f14a7cca45c20e66c1d4352be4bda2 (patch)
tree35d9185f6afec4b8e821196d6bd8ea125bf2a673
parent9863c37e286cef5924cf22980276f64aa42bed2b (diff)
New device: UPD7004 ADC
-rw-r--r--scripts/src/machine.lua12
-rw-r--r--scripts/target/mame/arcade.lua1
-rw-r--r--scripts/target/mame/mess.lua1
-rw-r--r--src/devices/machine/upd7004.cpp171
-rw-r--r--src/devices/machine/upd7004.h80
5 files changed, 265 insertions, 0 deletions
diff --git a/scripts/src/machine.lua b/scripts/src/machine.lua
index bc1f7609667..5d4d6771f9f 100644
--- a/scripts/src/machine.lua
+++ b/scripts/src/machine.lua
@@ -2929,6 +2929,18 @@ end
---------------------------------------------------
--
+--@src/devices/machine/upd7004.h,MACHINES["UPD7004"] = true
+---------------------------------------------------
+
+if (MACHINES["UPD7004"]~=null) then
+ files {
+ MAME_DIR .. "src/devices/machine/upd7004.cpp",
+ MAME_DIR .. "src/devices/machine/upd7004.h",
+ }
+end
+
+---------------------------------------------------
+--
--@src/devices/machine/upd71071.h,MACHINES["UPD71071"] = true
---------------------------------------------------
diff --git a/scripts/target/mame/arcade.lua b/scripts/target/mame/arcade.lua
index 8e0ca9930f7..977e1db04ff 100644
--- a/scripts/target/mame/arcade.lua
+++ b/scripts/target/mame/arcade.lua
@@ -609,6 +609,7 @@ MACHINES["UPD1990A"] = true
MACHINES["UPD4992"] = true
MACHINES["UPD4701"] = true
MACHINES["UPD7002"] = true
+MACHINES["UPD7004"] = true
MACHINES["UPD71071"] = true
MACHINES["UPD765"] = true
MACHINES["FDC_PLL"] = true
diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index d357762eabc..269d649a0ea 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -628,6 +628,7 @@ MACHINES["UPD1990A"] = true
--MACHINES["UPD4992"] = true
MACHINES["UPD4701"] = true
MACHINES["UPD7002"] = true
+--MACHINES["UPD7004"] = true
MACHINES["UPD71071"] = true
MACHINES["UPD765"] = true
MACHINES["FDC_PLL"] = true
diff --git a/src/devices/machine/upd7004.cpp b/src/devices/machine/upd7004.cpp
new file mode 100644
index 00000000000..26ca3c45622
--- /dev/null
+++ b/src/devices/machine/upd7004.cpp
@@ -0,0 +1,171 @@
+// license: BSD-3-Clause
+// copyright-holders: Dirk Best
+/***************************************************************************
+
+ µPD7004
+
+ 10-bit 8 Channel A/D Converter
+
+ TODO:
+ - Serial modes
+ - 2s complement output
+
+***************************************************************************/
+
+#include "emu.h"
+#include "upd7004.h"
+
+#define VERBOSE 0
+#include "logmacro.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(UPD7004, upd7004_device, "upd7004", "UPD7004 A/D Converter")
+
+// permit our enum to be saved
+ALLOW_SAVE_TYPE(upd7004_device::state);
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// upd7004_device - constructor
+//-------------------------------------------------
+
+upd7004_device::upd7004_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ device_t(mconfig, UPD7004, tag, owner, clock),
+ m_eoc_cb(*this), m_eoc_ff_cb(*this),
+ m_in_cb{ {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this} },
+ m_state(STATE_IDLE),
+ m_cycle_timer(nullptr),
+ m_div(1), m_code(false), m_address(0), m_sar(0x3ff)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void upd7004_device::device_start()
+{
+ // resolve callbacks
+ m_eoc_cb.resolve_safe();
+ m_eoc_ff_cb.resolve_safe();
+
+ for (int i = 0; i < 8; i++)
+ m_in_cb[i].resolve_safe(0x3ff);
+
+ // allocate timers
+ m_cycle_timer = timer_alloc();
+ m_cycle_timer->adjust(attotime::never);
+
+ // register for save states
+ save_item(NAME(m_state));
+ save_item(NAME(m_div));
+ save_item(NAME(m_code));
+ save_item(NAME(m_address));
+ save_item(NAME(m_sar));
+}
+
+//-------------------------------------------------
+// device_timer - handler timer events
+//-------------------------------------------------
+
+void upd7004_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+ switch (m_state)
+ {
+ case STATE_IDLE:
+ m_cycle_timer->adjust(attotime::never);
+ break;
+
+ case STATE_CONVERSION_START:
+ m_sar = m_in_cb[m_address](0);
+
+ // the conversion takes 96 to 104 cycles
+ m_state = STATE_CONVERSION_DONE;
+ m_cycle_timer->adjust(attotime::from_ticks(100, clock() / m_div));
+
+ break;
+
+ case STATE_CONVERSION_DONE:
+ {
+ // set eoc
+ m_eoc_cb(1);
+ m_eoc_ff_cb(1);
+
+ m_state = STATE_IDLE;
+ m_cycle_timer->adjust(attotime::never);
+
+ LOG("Conversion finished, result: %03x\n", m_sar);
+
+ break;
+ }
+ }
+}
+
+
+//**************************************************************************
+// INTERFACE
+//**************************************************************************
+
+READ8_MEMBER(upd7004_device::read)
+{
+ uint8_t data = 0xff;
+
+ // connected to a flip-flop, cleared on read
+ m_eoc_ff_cb(0);
+
+ switch (offset)
+ {
+ case 0:
+ // low-byte data output
+ data = (m_sar & 0x03) << 6;
+ break;
+
+ case 1:
+ // high-byte data output
+ data = (m_sar >> 2) & 0xff;
+ break;
+ }
+
+ return data;
+}
+
+WRITE8_MEMBER(upd7004_device::write)
+{
+ switch (offset)
+ {
+ case 0:
+ // address set
+ m_address = data & 0x07;
+
+ // reset eoc
+ m_eoc_cb(0);
+
+ // start conversion timer
+ m_state = STATE_CONVERSION_START;
+ m_cycle_timer->adjust(attotime::from_hz(clock() / m_div));
+
+ LOG("Select address %d\n", m_address);
+
+ break;
+
+ case 1:
+ // initialize
+ m_div = 1 << (data & 0x03);
+ m_code = data & 0x04;
+
+ logerror("Initialize with clock division ratio %d, %s data\n", m_div, m_code ? "2s complement" : "binary");
+
+ if (m_code)
+ logerror("Warning: 2s complement data unimplemented\n");
+
+ break;
+ }
+}
diff --git a/src/devices/machine/upd7004.h b/src/devices/machine/upd7004.h
new file mode 100644
index 00000000000..fed6e5764c7
--- /dev/null
+++ b/src/devices/machine/upd7004.h
@@ -0,0 +1,80 @@
+// license: BSD-3-Clause
+// copyright-holders: Dirk Best
+/***************************************************************************
+
+ µPD7004
+
+ 10-bit 8 Channel A/D Converter
+
+ ___ ___
+ CH4 1 |* u | 28 CH3
+ CH5 2 | | 27 CH2
+ CH6 3 | | 26 CH1
+ CH7 4 | | 25 CH0
+ VREF 5 | | 24 AGND
+ DGND 6 | | 23 AVDD
+ DB7/SO 7 | | 22 CS
+ DB6/SI 8 | | 21 RD/SCKI
+ DB5/SHIFT 9 | | 20 A0
+ DB4/SCKO 10 | | 19 WR/STB
+ DB3/SOEN 11 | | 18 MC
+ DB2/CODE 12 | | 17 CLOCK
+ DB1/DEV1 13 | | 16 EOC
+ DB0/DEV0 14 |_______| 15 DVDD
+
+***************************************************************************/
+
+#ifndef MAME_DEVICES_MACHINE_UPD7004_H
+#define MAME_DEVICES_MACHINE_UPD7004_H
+
+#pragma once
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class upd7004_device : public device_t
+{
+public:
+ // construction/destruction
+ upd7004_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ auto eoc_callback() { return m_eoc_cb.bind(); }
+ auto eoc_ff_callback() { return m_eoc_ff_cb.bind(); }
+ template <int N> auto in_callback() { return m_in_cb[N].bind(); }
+
+ DECLARE_READ8_MEMBER(read);
+ DECLARE_WRITE8_MEMBER(write);
+
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+
+private:
+ // callbacks
+ devcb_write_line m_eoc_cb;
+ devcb_write_line m_eoc_ff_cb;
+ devcb_read16 m_in_cb[8];
+
+ enum state : int
+ {
+ STATE_IDLE,
+ STATE_CONVERSION_START,
+ STATE_CONVERSION_DONE
+ };
+ state m_state;
+
+ emu_timer *m_cycle_timer;
+
+ // state
+ int m_div;
+ bool m_code;
+ int m_address;
+ uint16_t m_sar;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(UPD7004, upd7004_device)
+
+#endif // MAME_DEVICES_MACHINE_UPD7004_H