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1.1 root 1: //
2: // nono
3: // Copyright (C) 2025 nono project
4: // Licensed under nono-license.txt
5: //
6:
7: //
8: // HD647180 ASCI (非同期シリアル)
9: //
10:
11: #pragma once
12:
13: #include "device.h"
14: #include "event.h"
15: #include "message.h"
16: #include <array>
17:
18: class HostCOMDevice;
19: class MPU64180Device;
20:
21: class HD647180ASCIDevice : public Device
22: {
23: using inherited = Device;
24:
25: // CNTLA0, CNTLA1
26: static constexpr uint32 CNTL_MPE = 0x80; // Multi Processor Enable
27: static constexpr uint32 CNTL_RE = 0x40; // Receive Enable
28: static constexpr uint32 CNTL_TE = 0x20; // Transmit Enable
29: static constexpr uint32 CNTL_nRTS0 = 0x10; // !RequestToSend
30: static constexpr uint32 CNTL_CKA1D = 0x10; // CKA1 Disable
31: static constexpr uint32 CNTL_EFR = 0x08; // Error Flag Reset
32: static constexpr uint32 CNTL_DATA8 = 0x04; // MODE2 (Data bits)
33: static constexpr uint32 CNTL_PAREN = 0x02; // MODE1 (Parity Enable)
34: static constexpr uint32 CNTL_STOP2 = 0x01; // MODE0 (Stop bits)
35:
36: // CNTLB0, CNTLB1
37: static constexpr uint32 CNTL_MPBT = 0x80; // Multi Processor Bit Transmit
38: static constexpr uint32 CNTL_MP = 0x40; // Multi Processor
39: static constexpr uint32 CNTL_nCTS = 0x20; // R: !CTS
40: static constexpr uint32 CNTL_PS = 0x20; // W: PreScaler
41: static constexpr uint32 CNTL_PEO = 0x10; // Parity Even or Odd
42: static constexpr uint32 CNTL_DR = 0x08; // Divide Ratio
43: static constexpr uint32 CNTL_SS = 0x07; // Clock Source and Speed Select
44:
45: // STAT0, STAT1
46: static constexpr uint32 STAT_RDRF = 0x80; // Receive Data Register Full
47: static constexpr uint32 STAT_OVRN = 0x40; // Over Run Error
48: static constexpr uint32 STAT_PE = 0x20; // Parity Error
49: static constexpr uint32 STAT_FE = 0x10; // Framing Error
50: static constexpr uint32 STAT_RIE = 0x08; // Receive Interrupt Enable
51: static constexpr uint32 STAT_nDCD0 = 0x04; // R: Data Carrier Detect
52: static constexpr uint32 STAT_CTS1E = 0x04; // W: !CTS Enable
53: static constexpr uint32 STAT_TDRE = 0x02; // Transmit Data Register Empty
54: static constexpr uint32 STAT_TIE = 0x01; // Transmit Interrupt Enable
55:
56: // 非同期シリアル1個分
57: struct Channel {
58: uint id; // 0 or 1
59:
60: bool rx_enable;
61: bool tx_enable;
62: bool rx_intr_enable;
63: bool tx_intr_enable;
64: bool data8bit; // MOD2
65: bool parity_en; // MOD1
66: bool stop2bit; // MOD0
67: bool parity_odd;
68: bool prescale;
69: bool divratio;
70: uint8 ss;
71: bool nCTS;
72: bool overrun;
73:
74: uint8 tdr;
75: bool tdr_empty;
76: uint8 rdr;
77: bool rdr_full;
78: int32 tsr; // 負数なら Empty。
79: int32 rsr; // 負数なら Empty。
80:
81: uint64 bit12_ns;
82: uint32 baudrate;
83: };
84:
85: public:
86: HD647180ASCIDevice();
87: ~HD647180ASCIDevice() override;
88:
89: bool Create() override;
90: bool Init() override;
91: void ResetHard(bool poweron) override;
92:
93: uint32 ReadCNTLA(uint n);
94: uint32 ReadCNTLB(uint n);
95: uint32 ReadSTAT(uint n);
96: uint32 ReadTDR(uint n);
97: uint32 ReadRDR(uint n);
98: uint32 WriteCNTLA(uint n, uint32 data);
99: uint32 WriteCNTLB(uint n, uint32 data);
100: uint32 WriteSTAT(uint n, uint32 data);
101: uint32 WriteTDR(uint n, uint32 data);
102: uint32 WriteRDR(uint n, uint32 data);
103: uint32 PeekCNTLA(uint n) const;
104: uint32 PeekCNTLB(uint n) const;
105: uint32 PeekSTAT(uint n) const;
106: uint32 PeekTDR(uint n) const;
107: uint32 PeekRDR(uint n) const;
108:
109: private:
110: DECLARE_MONITOR_CALLBACK(MonitorUpdate);
111: void MonitorUpdateChan(TextScreen&, int y, int n) const;
112:
113: void ChangeInterrupt(uint n);
114: void ChangeBaudRate(uint n);
115:
116: void TxCallback(Event&);
117:
118: // 受信側
119: void HostRxCallback(uint32);
120: void RxMessage(MessageID, uint32);
121: void RxCallback(Event&);
122: bool Rx(uint n, uint32 data);
123:
124: // 入力クロックを 160分周した基本周波数とでもいうべきもの、
125: // の 12ビット分を [nsec] にしたもの。
126: uint64 xc12_ns {};
127:
128: std::array<Channel, 2> channels {};
129: bool cts1_enable {};
130: bool cka1_disable {};
131:
132: bool nRTS0 {};
133: bool nDCD0 {};
134:
135: std::array<Event, 2> txevent {};
136: std::array<Event, 2> rxevent {};
137:
138: std::array<std::unique_ptr<HostCOMDevice>, 2> hostcom /*{}*/;
139:
140: Monitor *monitor {};
141:
142: MPU64180Device *xp {};
143: };
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