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author arbee <rb6502@users.noreply.github.com>2015-01-27 23:39:50 -0500
committer arbee <rb6502@users.noreply.github.com>2015-01-27 23:39:50 -0500
commit1f427fdf7aa7b119ce1612e611e065953983d7cb (patch)
tree78384066afc428a967ce9a54eb32de590b1dd4f4 /src/emu/bus/nes_ctrl/miracle.c
parent4d24ee5e02d0ad8f118def6d929d18a28be60be8 (diff)
(MESS) More flesh on Miracle skeleton (nw)
Diffstat (limited to 'src/emu/bus/nes_ctrl/miracle.c')
-rw-r--r--src/emu/bus/nes_ctrl/miracle.c134
1 files changed, 103 insertions, 31 deletions
diff --git a/src/emu/bus/nes_ctrl/miracle.c b/src/emu/bus/nes_ctrl/miracle.c
index 82ce2cc3796..dbf8bfd5a7f 100644
--- a/src/emu/bus/nes_ctrl/miracle.c
+++ b/src/emu/bus/nes_ctrl/miracle.c
@@ -11,11 +11,10 @@
**********************************************************************/
#include "miracle.h"
-#include "bus/midi/midi.h"
#define MIRACLE_MIDI_WAITING 0
-#define MIRACLE_MIDI_RECEIVE 1
-#define MIRACLE_MIDI_SEND 2
+#define MIRACLE_MIDI_RECEIVE 1 // receive byte from piano
+#define MIRACLE_MIDI_SEND 2 // send byte to piano
//**************************************************************************
// DEVICE DEFINITIONS
@@ -25,8 +24,6 @@ const device_type NES_MIRACLE = &device_creator<nes_miracle_device>;
MACHINE_CONFIG_FRAGMENT( nes_miracle )
-// MCFG_CPU_ADD("piano_cpu", I8051, XTAL_11_0592MHz) // xtal to be verified
-
MCFG_MIDI_PORT_ADD("mdin", midiin_slot, "midiin")
MCFG_MIDI_PORT_ADD("mdout", midiout_slot, "midiout")
MACHINE_CONFIG_END
@@ -58,9 +55,11 @@ void nes_miracle_device::device_timer(emu_timer &timer, device_timer_id id, int
//-------------------------------------------------
nes_miracle_device::nes_miracle_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
- device_t(mconfig, NES_MIRACLE, "Miracle Piano Controller", tag, owner, clock, "nes_miracle", __FILE__)
- , device_nes_control_port_interface(mconfig, *this)
-// , m_cpu(*this, "piano_cpu")
+ device_t(mconfig, NES_MIRACLE, "Miracle Piano Controller", tag, owner, clock, "nes_miracle", __FILE__),
+ device_serial_interface(mconfig, *this),
+ device_nes_control_port_interface(mconfig, *this),
+ m_midiin(*this, "mdin"),
+ m_midiout(*this, "mdout")
{
}
@@ -90,6 +89,14 @@ void nes_miracle_device::device_reset()
m_sent_bits = 0;
m_strobe_clock = 0;
m_midi_mode = MIRACLE_MIDI_WAITING;
+
+ // set standard MIDI parameters
+ set_data_frame(1, 8, PARITY_NONE, STOP_BITS_1);
+ set_rcv_rate(31250);
+ set_tra_rate(31250);
+
+ m_xmit_read = m_xmit_write = 0;
+ m_tx_busy = false;
}
@@ -102,17 +109,8 @@ void nes_miracle_device::device_reset()
UINT8 nes_miracle_device::read_bit0()
{
UINT8 ret = 0;
- if (m_strobe_clock >= 66)
- {
- // more than 66 clocks since strobe on write means send mode
- m_midi_mode = MIRACLE_MIDI_SEND;
- strobe_timer->reset();
- m_strobe_on = 0;
- m_strobe_clock = 0;
-// printf("send start\n");
- }
- if (m_midi_mode == MIRACLE_MIDI_SEND)
+ if (m_midi_mode == MIRACLE_MIDI_RECEIVE)
{
//NES reads from Miracle Piano!
// ret |= ...
@@ -126,9 +124,33 @@ UINT8 nes_miracle_device::read_bit0()
//-------------------------------------------------
// TODO: here, writes to serial midi in bit0, when in MIDI_RECEIVE mode
+// c4fc = start of recv routine
+// c53a = start of send routine
void nes_miracle_device::write(UINT8 data)
{
+// printf("write: %d (%d %02x %d)\n", data & 1, m_sent_bits, m_data_sent, m_midi_mode);
+
+ if (m_midi_mode == MIRACLE_MIDI_SEND)
+ {
+ //NES writes (data & 1) to Miracle Piano!
+ // 1st write is data present flag (1=data present)
+ // next 8 writes are actual data bits (with ^1)
+ m_sent_bits++;
+ m_data_sent <<= 1;
+ m_data_sent |= (data & 1);
+ // then we go back to waiting
+ if (m_sent_bits == 8)
+ {
+// printf("xmit MIDI byte %02x\n", m_data_sent);
+ xmit_char(m_data_sent);
+ m_midi_mode = MIRACLE_MIDI_WAITING;
+ m_sent_bits = 0;
+ }
+
+ return;
+ }
+
if (data == 1 && !m_strobe_on)
{
strobe_timer->adjust(attotime::zero, 0, machine().device<cpu_device>("maincpu")->cycles_to_attotime(1));
@@ -141,38 +163,88 @@ void nes_miracle_device::write(UINT8 data)
// was timer running?
if (m_strobe_clock > 0)
{
+// printf("got strobe at %d clocks\n", m_strobe_clock);
+
if (m_strobe_clock < 66 && data == 0)
{
- // less than 66 clocks before new write means receive mode
+ // short delay is recieve mode
m_midi_mode = MIRACLE_MIDI_RECEIVE;
-// printf("receive start\n");
strobe_timer->reset();
m_strobe_on = 0;
m_strobe_clock = 0;
return;
}
+ else if (m_strobe_clock >= 66)
+ {
+ // more than 66 clocks since strobe on write means send mode
+ m_midi_mode = MIRACLE_MIDI_SEND;
+ strobe_timer->reset();
+ m_strobe_on = 0;
+ m_strobe_clock = 0;
+ m_sent_bits = 1;
+ m_data_sent <<= 1;
+ m_data_sent |= (data & 1);
+ return;
+ }
}
if (m_midi_mode == MIRACLE_MIDI_SEND && data == 0)
{
// strobe off after the end of a byte
m_midi_mode = MIRACLE_MIDI_WAITING;
-// printf("send end\n");
}
}
+}
- if (m_midi_mode == MIRACLE_MIDI_RECEIVE)
+void nes_miracle_device::rcv_complete() // Rx completed receiving byte
+{
+ receive_register_extract();
+// UINT8 rcv = get_received_char();
+}
+
+void nes_miracle_device::tra_complete() // Tx completed sending byte
+{
+// printf("Tx complete\n");
+ // is there more waiting to send?
+ if (m_xmit_read != m_xmit_write)
{
- //NES writes (data & 1) to Miracle Piano!
- // 1st write is data present flag (1=data present)
- // next 8 writes are actual data bits (with ^1)
- m_sent_bits++;
- // then we go back to waiting
- if (m_sent_bits == 9)
+ transmit_register_setup(m_xmitring[m_xmit_read++]);
+ if (m_xmit_read >= XMIT_RING_SIZE)
{
-// printf("receive end\n");
- m_midi_mode = MIRACLE_MIDI_WAITING;
- m_sent_bits = 0;
+ m_xmit_read = 0;
}
}
+ else
+ {
+ m_tx_busy = false;
+ }
}
+
+void nes_miracle_device::tra_callback() // Tx send bit
+{
+ // send this to midi out
+ m_midiout->write_txd(transmit_register_get_data_bit());
+}
+
+void nes_miracle_device::xmit_char(UINT8 data)
+{
+// printf("xmit %02x\n", data);
+
+ // if tx is busy it'll pick this up automatically when it completes
+ // if not, send now!
+ if (!m_tx_busy)
+ {
+ m_tx_busy = true;
+ transmit_register_setup(data);
+ }
+ else
+ {
+ // tx is busy, it'll pick this up next time
+ m_xmitring[m_xmit_write++] = data;
+ if (m_xmit_write >= XMIT_RING_SIZE)
+ {
+ m_xmit_write = 0;
+ }
+ }
+}
+