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author | 2015-11-08 12:56:12 +0100 | |
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committer | 2015-11-08 12:56:12 +0100 | |
commit | 7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch) | |
tree | f310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/devices/machine/upd4701.cpp | |
parent | a57b46ae933badd7441ce1644711dbb851e2b504 (diff) |
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/devices/machine/upd4701.cpp')
-rw-r--r-- | src/devices/machine/upd4701.cpp | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/src/devices/machine/upd4701.cpp b/src/devices/machine/upd4701.cpp new file mode 100644 index 00000000000..4a7adfda291 --- /dev/null +++ b/src/devices/machine/upd4701.cpp @@ -0,0 +1,259 @@ +// license:BSD-3-Clause +// copyright-holders:smf +/*************************************************************************** + + NEC uPD4701 + + Incremental Encoder Control + + 2009-06 Converted to be a device + +***************************************************************************/ + +#include "emu.h" +#include "upd4701.h" + +#define MASK_SWITCHES ( 7 ) +#define MASK_COUNTER ( 0xfff ) + +const device_type UPD4701 = &device_creator<upd4701_device>; + +upd4701_device::upd4701_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, UPD4701, "uPD4701 Encoder", tag, owner, clock, "upd4701", __FILE__) +{ +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void upd4701_device::device_config_complete() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void upd4701_device::device_start() +{ + save_item(NAME(m_cs)); + save_item(NAME(m_xy)); + save_item(NAME(m_ul)); + save_item(NAME(m_resetx)); + save_item(NAME(m_resety)); + save_item(NAME(m_latchx)); + save_item(NAME(m_latchy)); + save_item(NAME(m_startx)); + save_item(NAME(m_starty)); + save_item(NAME(m_x)); + save_item(NAME(m_y)); + save_item(NAME(m_switches)); + save_item(NAME(m_latchswitches)); + save_item(NAME(m_cf)); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void upd4701_device::device_reset() +{ + m_cs = 1; + m_xy = 0; + m_ul = 0; + m_resetx = 0; + m_resety = 0; + m_latchx = 0; + m_latchy = 0; + m_startx = 0; + m_starty = 0; + m_x = 0; + m_y = 0; + m_switches = 0; + m_latchswitches = 0; + m_cf = 1; +} + +/* x,y increments can be 12bit (see MASK_COUNTER), hence we need a couple of +16bit handlers in the following */ + +/*------------------------------------------------- + ul_w +-------------------------------------------------*/ + +WRITE_LINE_MEMBER( upd4701_device::ul_w ) +{ + m_ul = state; +} + +/*------------------------------------------------- + xy_w +-------------------------------------------------*/ + +WRITE_LINE_MEMBER( upd4701_device::xy_w ) +{ + m_xy = state; +} + +/*------------------------------------------------- + cs_w +-------------------------------------------------*/ + +WRITE_LINE_MEMBER( upd4701_device::cs_w ) +{ + if (m_cs != state) + { + m_cs = state; + + if (!m_cs) + { + m_latchx = (m_x - m_startx) & MASK_COUNTER; + m_latchy = (m_y - m_starty) & MASK_COUNTER; + + m_latchswitches = (~m_switches) & MASK_SWITCHES; + if (m_latchswitches != 0) + { + m_latchswitches |= 8; + } + + m_cf = 1; + } + } +} + +/*------------------------------------------------- + resetx_w +-------------------------------------------------*/ + +WRITE_LINE_MEMBER( upd4701_device::resetx_w ) +{ + if (m_resetx != state) + { + m_resetx = state; + + if (m_resetx) + { + m_startx = m_x; + } + } +} + +/*------------------------------------------------- + resety_w +-------------------------------------------------*/ + +WRITE_LINE_MEMBER( upd4701_device::resety_w ) +{ + if (m_resety != state) + { + m_resety = state; + + if (m_resety) + { + m_starty = m_y; + } + } +} + +/*------------------------------------------------- + x_add +-------------------------------------------------*/ + +void upd4701_device::x_add( INT16 data ) +{ + if (!m_resetx && data != 0) + { + m_x += data; + + if (m_cs) + { + m_cf = 0; + } + } +} + +/*------------------------------------------------- + y_add +-------------------------------------------------*/ + +void upd4701_device::y_add( INT16 data ) +{ + if (!m_resety && data != 0) + { + m_y += data; + + if (m_cs) + { + m_cf = 0; + } + } +} + +/*------------------------------------------------- + switches_set +-------------------------------------------------*/ + +void upd4701_device::switches_set( UINT8 data ) +{ + m_switches = data; +} + +/*------------------------------------------------- + d_r +-------------------------------------------------*/ + +READ16_MEMBER( upd4701_device::d_r ) +{ + int data; + + if (m_cs) + { + return 0xff; + } + + if (m_xy) + { + data = m_latchy; + } + else + { + data = m_latchx; + } + + data |= m_latchswitches << 12; + + if (m_ul) + { + return data >> 8; + } + else + { + return data & 0xff; + } +} + +/*------------------------------------------------- + sf_r +-------------------------------------------------*/ + +READ_LINE_MEMBER( upd4701_device::sf_r ) +{ + if ((m_switches & MASK_SWITCHES) != MASK_SWITCHES) + { + return 0; + } + + return 1; +} + +/*------------------------------------------------- + cf_r +-------------------------------------------------*/ + +READ_LINE_MEMBER( upd4701_device::cf_r ) +{ + return m_cf; +} |