Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-22 08:22:15 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

diserial: Added some information getters for future use. (nw)

Browse Source
This commit is contained in:
Curt Coder 2014-01-14 18:48:54 +00:00
parent 88e7355999
commit 189678f296
2 changed files with 21 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/emu/diserial.c
View File

@ -7,18 +7,6 @@
#include "emu.h"
/* receive is waiting for start bit. The transition from high-low indicates
start of start bit. This is used to synchronise with the data being transfered */
#define RECEIVE_REGISTER_WAITING_FOR_START_BIT 0x01
/* receive is synchronised with data, data bits will be clocked in */
#define RECEIVE_REGISTER_SYNCHRONISED 0x02
/* set if receive register has been filled */
#define RECEIVE_REGISTER_FULL 0x04
/* register is empty and ready to be filled with data */
#define TRANSMIT_REGISTER_EMPTY 0x0001
device_serial_interface::device_serial_interface(const machine_config &mconfig, device_t &device)
: device_interface(device),
m_input_state(0),

21
src/emu/diserial.h
View File

@ -18,6 +18,25 @@
class device_serial_interface : public device_interface
{
public:
enum
{
/* receive is waiting for start bit. The transition from high-low indicates
start of start bit. This is used to synchronise with the data being transfered */
RECEIVE_REGISTER_WAITING_FOR_START_BIT = 0x01,
/* receive is synchronised with data, data bits will be clocked in */
RECEIVE_REGISTER_SYNCHRONISED = 0x02,
/* set if receive register has been filled */
RECEIVE_REGISTER_FULL = 0x04
};
enum
{
/* register is empty and ready to be filled with data */
TRANSMIT_REGISTER_EMPTY = 0x0001
};
/* parity selections */
/* if all the bits are added in a byte, if the result is:
even -> parity is even
@ -95,6 +114,8 @@ protected:
bool is_receive_register_full();
bool is_transmit_register_empty();
bool is_receive_register_synchronized() { return m_rcv_flags & RECEIVE_REGISTER_SYNCHRONISED; }
bool is_receive_register_shifting() { return m_rcv_bit_count_received > 0; }
UINT8 get_received_char() { return m_rcv_byte_received; }