MySystemCProj/touchScreen.h at master · wustudent/MySystemCProj · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
#ifndef TOUCHSCREEN_H_
#define TOUCHSCREEN_H_

#include "systemc.h"
#include "interface.h"
using namespace std;

SC_MODULE(TouchScreen){
	//port(s) connected to outside
	sc_out<Display> display;

	//port(s) inside the phone
	sc_in<bool> shortPress;
	sc_in<bool> onActivity;
	sc_in<bool> powered_on;			//intended to read phone state
	sc_in<bool> pt_pressed;			//to record the display state when button is pressed down,
											//without it will cause the problem against the user's will:
											//(During the short-press period, display may be turned off automatically,
											//when user then release the button, display SHOULD NOT be open again)
	//internal variable
	sc_time lastActivityTimestamp;
	Display stateWhenPressedDown;


	//constructor
	SC_HAS_PROCESS(TouchScreen);
    TouchScreen(sc_module_name name){
		display.initialize(Display::DISP_DARK);
		stateWhenPressedDown=Display::DISP_DARK;
		#if defined(DEBUG_SCREEN) || defined(DEBUG)
			print("touchscreen init");
		#endif

		SC_THREAD(run);

		SC_METHOD(phoneOnOffHandler);
		sensitive<<powered_on;

		SC_METHOD(wakeUp);
		sensitive<<onActivity;

		SC_METHOD(recordState);
		sensitive<<pt_pressed;

		SC_METHOD(shortPressHandler);
		sensitive<<shortPress.pos();


	}
	void run(){
		while(1){
			wait(1,SC_SEC);
			if(powered_on.read()==true){
				if(sc_time_stamp()-lastActivityTimestamp==sc_time(80,SC_SEC)){
					dim();
				}else if(sc_time_stamp()-lastActivityTimestamp==sc_time(100,SC_SEC)){
					off();
				}
			}
		}
	}
	//phone on/off handler
	void phoneOnOffHandler(){
		#if defined(DEBUG_SCREEN) || defined(DEBUG)
			print("phoneOnOffHandler");
		#endif
		if(powered_on.read()==true){
			on();
		}else{
			off();
		}
	}
	//record state when pressed
	void recordState(){
		if(pt_pressed==true)
			stateWhenPressedDown=display.read();
	}

	void shortPressHandler(){		//only handles short press
		if(powered_on.read()==true){
			if(shortPress.read()==true){
				#if defined(DEBUG_SCREEN) || defined(DEBUG)
					print("shortPressHandler");
				#endif
				//Display currentState=display.read();//this is wrong, should not read state when release
				if(stateWhenPressedDown==Display::DISP_DARK){//recorded state should be used
					on();
				}
				else{
					off();
				}
			}
		}
	}

	//activity handler
	void wakeUp(){
		#if defined(DEBUG_SCREEN) || defined(DEBUG)
			print("wakeUp");
		#endif
		if(onActivity.read()==true){
			if(display.read()!=Display::DISP_DARK){
				#if defined(DEBUG_SCREEN) || defined(DEBUG)
					print("wakeUp On");
				#endif
				on();
			}
		}
	}
	void change(Display nextState){

		Display currentState=display.read();
		bool validFlag=true;
		if(currentState==Display::DISP_DARK&&nextState==Display::DISP_MEDIUM){
			validFlag=false;
		}else if(currentState==nextState){
			validFlag=false;
		}
		if(validFlag==true){

			display.write(nextState);
			#if defined(DEBUG_SCREEN) || defined(DEBUG)
				switch(nextState){
					case Display::DISP_BRIGHT:print("change on()");break;
					case Display::DISP_MEDIUM:print("change dim()");break;
					default:print("change dark()");
				}
			#endif
		}
	}
	void on(){
		#if defined(DEBUG_SCREEN) || defined(DEBUG)
			print("on");
		#endif
		change(Display::DISP_BRIGHT);
		lastActivityTimestamp=sc_time_stamp();
	}
	void dim(){
		#if defined(DEBUG_SCREEN) || defined(DEBUG)
			print("dim");
		#endif
		change(Display::DISP_MEDIUM);
	}
	void off(){
		#if defined(DEBUG_SCREEN) || defined(DEBUG)
			print("off");
		#endif
		change(Display::DISP_DARK);
	}
	//print given string on cout
	void print(string s){
		cout << "[" << sc_time_stamp() << " / " << sc_delta_count() << "](" << name() << "): " << s << endl;
	}
};
#endif