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More meat to SCI

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This commit is contained in:
angelosa 2016-09-27 17:41:24 +02:00
parent 1c12f1f20d
commit c8b7b13ca5
4 changed files with 120 additions and 8 deletions
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1
src/devices/cpu/sh2/sh7604_bus.cpp
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@ -5,7 +5,6 @@
SH7604 BUS Controller
Lies at 0xffffffe0-0xffffffff
TODO:

4
src/devices/cpu/sh2/sh7604_bus.h
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@ -1,8 +1,8 @@
// license:BSD-3-Clause
// copyright-holders:<author_name>
// copyright-holders:Angelo Salese
/***************************************************************************
Template for skeleton device
SH7604 BUS Controller
***************************************************************************/

91
src/devices/cpu/sh2/sh7604_sci.cpp
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@ -1,8 +1,14 @@
// license:BSD-3-Clause
// copyright-holders:<author_name>
// copyright-holders:Angelo Salese
/***************************************************************************
Template for skeleton device
SH7604 SCI Controller
Lies at 0xfffffe00-0xfffffe0f
TODO:
- diserial;
- CPU callbacks for RX and TX;
***************************************************************************/
@ -23,8 +29,83 @@ const device_type SH7604_SCI = &device_creator<sh7604_sci_device>;
// LIVE DEVICE
//**************************************************************************
static ADDRESS_MAP_START( sci_regs, AS_0, 8, sh7604_sci_device )
READ8_MEMBER(sh7604_sci_device::serial_mode_r)
{
return m_smr;
}
WRITE8_MEMBER(sh7604_sci_device::serial_mode_w)
{
m_smr = data;
logerror("%s: serial mode set:\n",tag());
logerror("\tCommunication Mode: %s mode\n",data & 0x80 ? "clocked synchronous" : "asynchronous");
logerror("\tCharacter Length: %s mode\n",data & 0x40 ? "7-bit" : "8-bit");
logerror("\tParity Enable: %s\n",data & 0x20 ? "yes" : "no");
logerror("\tParity Mode: %s\n",data & 0x10 ? "Odd" : "Even");
logerror("\tStop bits: %s\n",data & 0x08 ? "2" : "1");
logerror("\tMultiprocessor mode: %s\n",data & 0x04 ? "yes" : "no");
logerror("\tClock select: clock/%d\n",4 << ((data & 0x03)*2));
}
READ8_MEMBER(sh7604_sci_device::serial_control_r)
{
return m_scr;
}
WRITE8_MEMBER(sh7604_sci_device::serial_control_w)
{
m_scr = data;
if(data & 0x30)
throw emu_fatalerror("%s: enabled serial control %02x\n", tag(),data);
}
READ8_MEMBER(sh7604_sci_device::serial_status_r)
{
return m_ssr;
}
WRITE8_MEMBER(sh7604_sci_device::serial_ack_w)
{
// TODO: verify this
m_ssr = (m_ssr & 0x06) | (m_ssr & data & 0xf9);
}
READ8_MEMBER(sh7604_sci_device::bitrate_r )
{
return m_brr;
}
WRITE8_MEMBER(sh7604_sci_device::bitrate_w )
{
m_brr = data;
}
READ8_MEMBER(sh7604_sci_device::transmit_data_r)
{
// ...
return 0;
}
WRITE8_MEMBER(sh7604_sci_device::transmit_data_w)
{
// ...
}
READ8_MEMBER(sh7604_sci_device::receive_data_r)
{
// ...
return 0;
}
static ADDRESS_MAP_START( sci_regs, AS_0, 8, sh7604_sci_device )
AM_RANGE(0x00, 0x00) AM_READWRITE(serial_mode_r, serial_mode_w)
AM_RANGE(0x01, 0x01) AM_READWRITE(bitrate_r, bitrate_w)
AM_RANGE(0x02, 0x02) AM_READWRITE(serial_control_r,serial_control_w)
AM_RANGE(0x03, 0x03) AM_READWRITE(transmit_data_r, transmit_data_w)
AM_RANGE(0x04, 0x04) AM_READWRITE(serial_status_r, serial_ack_w)
AM_RANGE(0x05, 0x05) AM_READ(receive_data_r)
ADDRESS_MAP_END
//-------------------------------------------------
@ -60,6 +141,10 @@ void sh7604_sci_device::device_start()
void sh7604_sci_device::device_reset()
{
m_smr = 0;
m_scr = 0;
m_ssr = STATUS_TDRE|STATUS_TEND; //0x84;
m_brr = 0xff;
}

32
src/devices/cpu/sh2/sh7604_sci.h
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@ -1,8 +1,8 @@
// license:BSD-3-Clause
// copyright-holders:<author_name>
// copyright-holders:Angelo Salese
/***************************************************************************
Template for skeleton device
SH7604 SCI Controller
***************************************************************************/
@ -11,6 +11,17 @@ Template for skeleton device
#ifndef __SH7604_SCIDEV_H__
#define __SH7604_SCIDEV_H__
enum {
STATUS_MPBT = 1 << 0,
STATUS_MPB = 1 << 1,
STATUS_TEND = 1 << 2,
STATUS_PER = 1 << 3,
STATUS_FER = 1 << 4,
STATUS_ORER = 1 << 5,
STATUS_RDRF = 1 << 6,
STATUS_TDRE = 1 << 7
};
//**************************************************************************
@ -36,6 +47,19 @@ public:
// I/O operations
DECLARE_WRITE8_MEMBER( write );
DECLARE_READ8_MEMBER( read );
DECLARE_READ8_MEMBER( serial_mode_r );
DECLARE_WRITE8_MEMBER( serial_mode_w );
DECLARE_READ8_MEMBER( bitrate_r );
DECLARE_WRITE8_MEMBER( bitrate_w );
DECLARE_READ8_MEMBER( serial_control_r );
DECLARE_WRITE8_MEMBER( serial_control_w );
DECLARE_READ8_MEMBER( transmit_data_r );
DECLARE_WRITE8_MEMBER( transmit_data_w );
DECLARE_READ8_MEMBER( serial_status_r );
DECLARE_WRITE8_MEMBER( serial_ack_w );
DECLARE_READ8_MEMBER( receive_data_r );
virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override;
protected:
@ -45,6 +69,10 @@ protected:
virtual void device_reset() override;
private:
const address_space_config m_space_config;
UINT8 m_smr;
UINT8 m_scr;
UINT8 m_ssr;
UINT8 m_brr;
};