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more i/o port stuff

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This commit is contained in:
hap 2015-05-14 23:38:52 +02:00
parent 56850f4b84
commit 52eea7c98f
2 changed files with 119 additions and 6 deletions
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118
src/emu/cpu/e0c6200/e0c6s46.c
View File

@ -3,11 +3,13 @@
/*
Seiko Epson E0C6S46 MCU
QFP5-128pin, see manual for pinout
TODO:
- K input interrupts
- finish i/o ports
- serial interface
- add mask options to MCFG (eg. buzzer on output port R4x is optional)
*/
@ -185,6 +187,12 @@ void e0c6s46_device::device_reset()
m_data->write_byte(0xf7b, 0x0);
m_data->write_byte(0xf7d, 0x0);
m_data->write_byte(0xf7e, 0x0);
// reset ports
for (int i = 0; i < 5; i++)
write_r(i, m_port_r[i]);
for (int i = 0; i < 4; i++)
write_p(i, m_port_p[i]);
}
@ -258,6 +266,84 @@ void e0c6s46_device::execute_set_input(int line, int state)
//-------------------------------------------------
// ports
//-------------------------------------------------
// R output ports
void e0c6s46_device::write_r(UINT8 port, UINT8 data)
{
data &= 0xf;
m_port_r[port] = data;
if (port == 4)
write_r4();
// ports R0x-R3x can be high-impedance
UINT8 out = data;
if (port < 4 && !(m_r_dir >> port & 1))
out = 0xf;
switch (port)
{
case 0: m_write_r0(port, out, 0xff); break;
case 1: m_write_r1(port, out, 0xff); break;
case 2: m_write_r2(port, out, 0xff); break;
case 3: m_write_r3(port, out, 0xff); break; // TODO: R33 PTCLK/_SRDY
}
}
void e0c6s46_device::write_r4()
{
// R40: _FOUT(clock inverted output)
// R42: FOUT or _BZ
// R43: BZ(buzzer) on
UINT8 data = m_port_r[4] & 2;
m_write_r4(4, data, 0xff);
}
// P I/O ports
void e0c6s46_device::write_p(UINT8 port, UINT8 data)
{
data &= 0xf;
m_port_p[port] = data;
// don't output if port direction is set to input
if (!(m_p_dir >> port & 1))
return;
switch (port)
{
case 0: m_write_p0(port, data, 0xff); break;
case 1: m_write_p1(port, data, 0xff); break;
case 2: m_write_p2(port, data, 0xff); break;
case 3: m_write_p3(port, data, 0xff); break;
}
}
UINT8 e0c6s46_device::read_p(UINT8 port)
{
// return written value if port direction is set to output
if (m_p_dir >> port & 1)
return m_port_p[port];
switch (port)
{
case 0: return m_read_p0(port, 0xff);
case 1: return m_read_p1(port, 0xff);
case 2: return m_read_p2(port, 0xff);
case 3: return m_read_p3(port, 0xff);
}
return 0;
}
//-------------------------------------------------
// timers
//-------------------------------------------------
@ -471,10 +557,14 @@ READ8_MEMBER(e0c6s46_device::io_r)
return m_dfk0;
// R output ports
case 0x50: case 0x51: case 0x52: case 0x53: case 0x54:
return m_port_r[offset & 7];
case 0x7b:
return m_r_dir;
// P i/o ports
// P I/O ports
case 0x60: case 0x61: case 0x62: case 0x63:
return read_p(offset & 3);
case 0x7d:
return m_p_dir;
case 0x7e:
@ -551,15 +641,35 @@ WRITE8_MEMBER(e0c6s46_device::io_w)
break;
// R output ports
case 0x50: case 0x51: case 0x52: case 0x53: case 0x54:
write_r(offset & 7, data);
break;
case 0x7b:
// d0-d3: Rx* direction 0: high impedance, 1: output
m_r_dir = data;
if (data != m_r_dir)
{
m_r_dir = data;
// refresh outputs
for (int i = 0; i < 5; i++)
write_r(i, m_port_r[i]);
}
break;
// P i/o ports
// P I/O ports
case 0x60: case 0x61: case 0x62: case 0x63:
write_p(offset & 3, data);
break;
case 0x7d:
// d0-d3: Px* direction 0: input, 1: output
m_p_dir = data;
if (data != m_p_dir)
{
m_p_dir = data;
// refresh outputs
for (int i = 0; i < 4; i++)
write_p(i, m_port_p[i]);
}
break;
case 0x7e:
// d0-d3: Px* pull up resistor on/off

7
src/emu/cpu/e0c6200/e0c6s46.h
View File

@ -27,7 +27,7 @@ enum
E0C6S46_PORT_R4X
};
// 4 4-bit P ports
// 4 4-bit P I/O ports
#define MCFG_E0C6S46_READ_P_CB(R, _devcb) \
hmcs40_cpu_device::set_read_r##P##_callback(*device, DEVCB_##_devcb);
#define MCFG_E0C6S46_WRITE_P_CB(R, _devcb) \
@ -63,7 +63,6 @@ typedef void (*e0c6s46_pixel_update_func)(device_t &device, bitmap_ind16 &bitmap
#define E0C6S46_PIXEL_UPDATE_CB(name) void name(device_t &device, bitmap_ind16 &bitmap, const rectangle &cliprect, int contrast, int seg, int com, int state)
class e0c6s46_device : public e0c6200_cpu_device
{
public:
@ -120,6 +119,10 @@ private:
devcb_write8 m_write_r0, m_write_r1, m_write_r2, m_write_r3, m_write_r4;
devcb_read8 m_read_p0, m_read_p1, m_read_p2, m_read_p3;
devcb_write8 m_write_p0, m_write_p1, m_write_p2, m_write_p3;
void write_r(UINT8 port, UINT8 data);
void write_r4();
void write_p(UINT8 port, UINT8 data);
UINT8 read_p(UINT8 port);
UINT8 m_port_r[5];
UINT8 m_r_dir;