URL https://opencores.org/ocsvn/wb_lcd/wb_lcd/trunk

Subversion Repositories wb_lcd

[/] [wb_lcd/] [trunk/] [myhdl/] [wb_lcd_workspace_ramless/] [workspace/] [.metadata/] [.plugins/] [org.eclipse.core.resources/] [.history/] [24/] [609e8b71d229001e105494278c3b862d] - Blame information for rev 2

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from myhdl import *
 
t_TxState = enum('tx_high_setup', 'tx_high_hold', 'tx_oneus', 'tx_low_setup', 'tx_low_hold', 'tx_fortyus', 'tx_done');
t_State = enum('display_init', 'init_fifteenms', 'init_one', 'init_two', 'init_three', 'init_four', 'init_five', 'init_six', 'init_seven', 'init_eight', 'display_function_set', 'display_entry_set', 'display_set_display', 'display_clr_display', 'display_pause_setup', 'display_pause', 'display_done', 'display_set_addr', 'display_char_write')
 
def delayCounter(clk, reset, count, load, done, width = 13):
 
    counter = Signal(intbv(0)[width:0])
 
    @always_comb
    def done_logic():
        done.next = (counter == 0)
 
    @always(clk.posedge)
    def countdown_logic():
        if load:
            counter.next = count
        else: #elif not done:
            counter.next = counter - 1
 
    return instances()
 
 
 
def lcd(clk, reset, dat, addr, we, busy, SF_D, LCD_E, LCD_RS, LCD_RW):
 
 
    state = Signal(t_State.display_init)
    tx_state = Signal(t_TxState.tx_done)
    tx_byte = Signal(intbv(0)[8:0])
    tx_init = Signal(bool())
    tx_done = Signal(bool())
    LCD_E0 = Signal(bool())
    SF_D0 = Signal(intbv(0)[4:0])
    LCD_E1 = Signal(bool())
    SF_D1 = Signal(intbv(0)[4:0])
 
    @always_comb
    def busy_and_rw_handlers():
        busy.next = (state != t_State.display_done)
        LCD_RW.next = 0
 
    #Delay counter
    main_delay_load = Signal(bool())
    main_delay_value = Signal(intbv(0)[20:0])
 
    tx_delay_load = Signal(bool())
    main_delay_load = Signal(bool())
    delay_load = Signal(bool())
 
    tx_delay_value = Signal(intbv(0)[20:0])
    main_delay_value = Signal(intbv(0)[20:0])
    delay_value = Signal(intbv(0)[20:0])
 
    delay_done = Signal(bool())
    output_selector  = Signal(bool())
    counter = delayCounter(clk, reset, delay_value, delay_load, delay_done, width = 21)
 
    @always_comb
    def conunter_sharing_load():
        delay_load.next = tx_delay_load or main_delay_load
 
    @always_comb
    def conunter_sharing_value():
        if tx_delay_load:
            delay_value.next = tx_delay_value
        else:
            delay_value.next = main_delay_value
 
 
    # SF_D and LCD_E management for sharing between Init and TX phases.
    @always_comb
    def output_tx_or_init_select(): # 0 tx; 1 init
        output_selector.next = (state == t_State.display_init) | (state == t_State.init_fifteenms) | (state == t_State.init_one) | (state == t_State.init_two) | (state == t_State.init_three) | (state == t_State.init_four) | (state == t_State.init_five) | (state == t_State.init_six) | (state == t_State.init_seven) | (state == t_State.init_eight)
 
    @always_comb
    def output_tx_or_init_mux():
        if output_selector: # Init
            SF_D.next = SF_D1
            LCD_E.next = LCD_E1
        else: # TX
            SF_D.next = SF_D0
            LCD_E.next = LCD_E0
 
 
    @always_comb
    def init_transmissions():
        tx_init.next = (~tx_done) & ((state == t_State.display_function_set) | (state == t_State.display_entry_set) | (state == t_State.display_set_display) | (state == t_State.display_clr_display) | (state == t_State.display_set_addr) | (state == t_State.display_char_write))
        LCD_RS.next = ~(bool(state == t_State.display_function_set) | (state == t_State.display_entry_set) | (state == t_State.display_set_display) | (state == t_State.display_clr_display) | (state == t_State.display_set_addr))
 
    @always(clk.posedge, reset.posedge)
    def DisplayFSM():
        if reset == 1:
            state.next = t_State.display_init
            main_delay_load.next = 0
            main_delay_value.next = 0
            SF_D1.next = 0
            LCD_E1.next = 0
            tx_byte.next = 0
        else:
            main_delay_load.next = 0;
            main_delay_value.next = 0;
            if state == t_State.display_init:
                tx_byte.next = 0 #00000000
 
                state.next = t_State.init_fifteenms
                main_delay_load.next = 1
                main_delay_value.next = 750000
 
            elif state == t_State.init_fifteenms:
                main_delay_load.next = 0
 
                if delay_done:
                    state.next = t_State.init_one;
                    main_delay_load.next = 1
                    main_delay_value.next = 11
 
            elif state == t_State.init_one:
                main_delay_load.next = 0
                SF_D1.next = 3
                LCD_E1.next = 1
 
                if delay_done:
                    state.next = t_State.init_two;
                    main_delay_load.next = 1
                    main_delay_value.next = 205000
 
            elif state == t_State.init_two:
                main_delay_load.next = 0
                LCD_E1.next = 0
 
                if delay_done:
                    state.next = t_State.init_three;
                    main_delay_load.next = 1
                    main_delay_value.next = 11
 
            elif state == t_State.init_three:
                main_delay_load.next = 0
                SF_D1.next = 3
                LCD_E1.next = 1
 
                if delay_done:
                    state.next = t_State.init_four;
                    main_delay_load.next = 1
                    main_delay_value.next = 5000
 
            elif state == t_State.init_four:
                main_delay_load.next = 0
                LCD_E1.next = 0
 
                if delay_done:
                    state.next = t_State.init_five;
                    main_delay_load.next = 1
                    main_delay_value.next = 11
 
 
            elif state == t_State.init_five:
                main_delay_load.next = 0
                SF_D1.next = 3
                LCD_E1.next = 1
 
                if delay_done:
                    state.next = t_State.init_six;
                    main_delay_load.next = 1
                    main_delay_value.next = 2000
 
            elif state == t_State.init_six:
                main_delay_load.next = 0
                LCD_E1.next = 0
 
                if delay_done:
                    state.next = t_State.init_seven;
                    main_delay_load.next = 1
                    main_delay_value.next = 11
 
            elif state == t_State.init_seven:
                main_delay_load.next = 0
                SF_D1.next = 2
                LCD_E1.next = 1
 
                if delay_done:
                    state.next = t_State.init_eight;
                    main_delay_load.next = 1
                    main_delay_value.next = 2000
 
            elif state == t_State.init_eight:
                main_delay_load.next = 0
                LCD_E1.next = 0
 
                if delay_done:
                    state.next = t_State.display_function_set;
 
            elif state == t_State.display_function_set:
                tx_byte.next = 40 #00101000
                if tx_done:
                    state.next = t_State.display_entry_set
 
            elif state == t_State.display_entry_set:
                tx_byte.next = 6 #00000110
                if tx_done:
                    state.next = t_State.display_set_display
 
            elif state == t_State.display_set_display:
                tx_byte.next = 12 #00001100
                if tx_done:
                    state.next = t_State.display_clr_display
 
            elif state == t_State.display_clr_display:
                tx_byte.next = 1 #00000001
                if tx_done:
                    state.next = t_State.display_pause_setup
                    main_delay_load.next = 1
                    main_delay_value.next = 82000
 
            elif state == t_State.display_pause_setup:
                state.next = t_State.display_pause
 
            elif state == t_State.display_pause:
                tx_byte.next = 0 #00000000
 
                if delay_done:
                    state.next = t_State.display_done;
 
            elif state == t_State.display_done:
                tx_byte.next = 0 #00000000
 
                if we:
                    state.next = t_State.display_set_addr
                else:
                    state.next = t_State.display_done
 
            elif state == t_State.display_set_addr:
                tx_byte.next = 128+addr #10000000
                if tx_done:
                    state.next = t_State.display_char_write
 
            elif state == t_State.display_char_write:
                tx_byte.next = dat
                if tx_done:
                    state.next = t_State.display_done;
           # else:
               # raise ValueError("Undefined Display state")
 
 
 
    @always(clk.posedge, reset.posedge)
    def TxFSM():
        if reset == 1:
            tx_state.next = t_TxState.tx_done
            SF_D0.next = 0
            LCD_E0.next = 0
        else:
            tx_delay_load.next = 0;
            tx_delay_value.next = 0;
            if tx_state == t_TxState.tx_high_setup:
                LCD_E0.next = 0
                SF_D0.next = tx_byte[8 : 4]
                tx_delay_load.next = 0
                if delay_done:
                    tx_state.next = t_TxState.tx_high_hold
                    tx_delay_load.next = 1
                    tx_delay_value.next = 12
 
            elif tx_state == t_TxState.tx_high_hold:
                LCD_E0.next = 1
                SF_D0.next = tx_byte[8 : 4]
                tx_delay_load.next = 0
                if delay_done:
                    tx_state.next = t_TxState.tx_oneus
                    tx_delay_load.next = 1
                    tx_delay_value.next = 50
 
            elif tx_state == t_TxState.tx_oneus:
                LCD_E0.next = 0
                tx_delay_load.next = 0
                if delay_done:
                    tx_state.next = t_TxState.tx_low_setup
                    tx_delay_load.next = 1
                    tx_delay_value.next = 2
 
            elif tx_state == t_TxState.tx_low_setup:
                LCD_E0.next = 0
                SF_D0.next = tx_byte[4 : 0]
                tx_delay_load.next = 0
                if delay_done:
                    tx_state.next = t_TxState.tx_low_hold
                    tx_delay_load.next = 1
                    tx_delay_value.next = 12
 
            elif tx_state == t_TxState.tx_low_hold:
                LCD_E0.next = 1
                SF_D0.next = tx_byte[4 : 0]
                tx_delay_load.next = 0
                if delay_done:
                    tx_state.next = t_TxState.tx_fortyus
                    tx_delay_load.next = 1
                    tx_delay_value.next = 2000
 
            elif tx_state == t_TxState.tx_fortyus:
                LCD_E0.next = 0
                tx_delay_load.next = 0
                if delay_done:
                    tx_state.next = t_TxState.tx_done
                    tx_done.next = 1
 
            elif tx_state == t_TxState.tx_done:
                LCD_E0.next = 0
                tx_done.next = 0
                tx_delay_load.next = 0
                if tx_init:
                    tx_state.next = t_TxState.tx_high_setup
                    tx_delay_load.next = 1
                    tx_delay_value.next = 2
           # else:
           #     raise ValueError("Undefined TX state")
 
    return instances()
 
def main():
    width = 20
 
    count = Signal(intbv(0)[width:0])
    clk, reset, we, busy, LCD_E, LCD_RS, LCD_RW = [Signal(bool(0)) for i in range(7)]
    dat = Signal(intbv(0)[32:0])
    addr = Signal(intbv(0)[7:0])
    SF_D = Signal(intbv(0)[4:0])
 
    toVerilog(lcd, clk, reset, dat, addr, we, busy, SF_D, LCD_E, LCD_RS, LCD_RW)
    toVHDL(lcd, clk, reset, dat, addr, we, busy, SF_D, LCD_E, LCD_RS, LCD_RW)
 
if __name__ == '__main__':
    main()
 

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Subversion Repositories wb_lcd

[/] [wb_lcd/] [trunk/] [myhdl/] [wb_lcd_workspace_ramless/] [workspace/] [.metadata/] [.plugins/] [org.eclipse.core.resources/] [.history/] [24/] [609e8b71d229001e105494278c3b862d] - Blame information for rev 2

Line No.	Rev	Author	Line
1	2	jvillar	`from myhdl import *`
2
3			`t_TxState = enum('tx_high_setup', 'tx_high_hold', 'tx_oneus', 'tx_low_setup', 'tx_low_hold', 'tx_fortyus', 'tx_done');`
4			`t_State = enum('display_init', 'init_fifteenms', 'init_one', 'init_two', 'init_three', 'init_four', 'init_five', 'init_six', 'init_seven', 'init_eight', 'display_function_set', 'display_entry_set', 'display_set_display', 'display_clr_display', 'display_pause_setup', 'display_pause', 'display_done', 'display_set_addr', 'display_char_write')`
5
6			`def delayCounter(clk, reset, count, load, done, width = 13):`
7
8			`counter = Signal(intbv(0)[width:0])`
9
10			`@always_comb`
11			`def done_logic():`
12			`done.next = (counter == 0)`
13
14			`@always(clk.posedge)`
15			`def countdown_logic():`
16			`if load:`
17			`counter.next = count`
18			`else: #elif not done:`
19			`counter.next = counter - 1`
20
21			`return instances()`
22
23
24
25			`def lcd(clk, reset, dat, addr, we, busy, SF_D, LCD_E, LCD_RS, LCD_RW):`
26
27
28			`state = Signal(t_State.display_init)`
29			`tx_state = Signal(t_TxState.tx_done)`
30			`tx_byte = Signal(intbv(0)[8:0])`
31			`tx_init = Signal(bool())`
32			`tx_done = Signal(bool())`
33			`LCD_E0 = Signal(bool())`
34			`SF_D0 = Signal(intbv(0)[4:0])`
35			`LCD_E1 = Signal(bool())`
36			`SF_D1 = Signal(intbv(0)[4:0])`
37
38			`@always_comb`
39			`def busy_and_rw_handlers():`
40			`busy.next = (state != t_State.display_done)`
41			`LCD_RW.next = 0`
42
43			`#Delay counter`
44			`main_delay_load = Signal(bool())`
45			`main_delay_value = Signal(intbv(0)[20:0])`
46
47			`tx_delay_load = Signal(bool())`
48			`main_delay_load = Signal(bool())`
49			`delay_load = Signal(bool())`
50
51			`tx_delay_value = Signal(intbv(0)[20:0])`
52			`main_delay_value = Signal(intbv(0)[20:0])`
53			`delay_value = Signal(intbv(0)[20:0])`
54
55			`delay_done = Signal(bool())`
56			`output_selector = Signal(bool())`
57			`counter = delayCounter(clk, reset, delay_value, delay_load, delay_done, width = 21)`
58
59			`@always_comb`
60			`def conunter_sharing_load():`
61			`delay_load.next = tx_delay_load or main_delay_load`
62
63			`@always_comb`
64			`def conunter_sharing_value():`
65			`if tx_delay_load:`
66			`delay_value.next = tx_delay_value`
67			`else:`
68			`delay_value.next = main_delay_value`
69
70
71			`# SF_D and LCD_E management for sharing between Init and TX phases.`
72			`@always_comb`
73			`def output_tx_or_init_select(): # 0 tx; 1 init`
74			`output_selector.next = (state == t_State.display_init) \| (state == t_State.init_fifteenms) \| (state == t_State.init_one) \| (state == t_State.init_two) \| (state == t_State.init_three) \| (state == t_State.init_four) \| (state == t_State.init_five) \| (state == t_State.init_six) \| (state == t_State.init_seven) \| (state == t_State.init_eight)`
75
76			`@always_comb`
77			`def output_tx_or_init_mux():`
78			`if output_selector: # Init`
79			`SF_D.next = SF_D1`
80			`LCD_E.next = LCD_E1`
81			`else: # TX`
82			`SF_D.next = SF_D0`
83			`LCD_E.next = LCD_E0`
84
85
86			`@always_comb`
87			`def init_transmissions():`
88			`tx_init.next = (~tx_done) & ((state == t_State.display_function_set) \| (state == t_State.display_entry_set) \| (state == t_State.display_set_display) \| (state == t_State.display_clr_display) \| (state == t_State.display_set_addr) \| (state == t_State.display_char_write))`
89			`LCD_RS.next = ~(bool(state == t_State.display_function_set) \| (state == t_State.display_entry_set) \| (state == t_State.display_set_display) \| (state == t_State.display_clr_display) \| (state == t_State.display_set_addr))`
90
91			`@always(clk.posedge, reset.posedge)`
92			`def DisplayFSM():`
93			`if reset == 1:`
94			`state.next = t_State.display_init`
95			`main_delay_load.next = 0`
96			`main_delay_value.next = 0`
97			`SF_D1.next = 0`
98			`LCD_E1.next = 0`
99			`tx_byte.next = 0`
100			`else:`
101			`main_delay_load.next = 0;`
102			`main_delay_value.next = 0;`
103			`if state == t_State.display_init:`
104			`tx_byte.next = 0 #00000000`
105
106			`state.next = t_State.init_fifteenms`
107			`main_delay_load.next = 1`
108			`main_delay_value.next = 750000`
109
110			`elif state == t_State.init_fifteenms:`
111			`main_delay_load.next = 0`
112
113			`if delay_done:`
114			`state.next = t_State.init_one;`
115			`main_delay_load.next = 1`
116			`main_delay_value.next = 11`
117
118			`elif state == t_State.init_one:`
119			`main_delay_load.next = 0`
120			`SF_D1.next = 3`
121			`LCD_E1.next = 1`
122
123			`if delay_done:`
124			`state.next = t_State.init_two;`
125			`main_delay_load.next = 1`
126			`main_delay_value.next = 205000`
127
128			`elif state == t_State.init_two:`
129			`main_delay_load.next = 0`
130			`LCD_E1.next = 0`
131
132			`if delay_done:`
133			`state.next = t_State.init_three;`
134			`main_delay_load.next = 1`
135			`main_delay_value.next = 11`
136
137			`elif state == t_State.init_three:`
138			`main_delay_load.next = 0`
139			`SF_D1.next = 3`
140			`LCD_E1.next = 1`
141
142			`if delay_done:`
143			`state.next = t_State.init_four;`
144			`main_delay_load.next = 1`
145			`main_delay_value.next = 5000`
146
147			`elif state == t_State.init_four:`
148			`main_delay_load.next = 0`
149			`LCD_E1.next = 0`
150
151			`if delay_done:`
152			`state.next = t_State.init_five;`
153			`main_delay_load.next = 1`
154			`main_delay_value.next = 11`
155
156
157			`elif state == t_State.init_five:`
158			`main_delay_load.next = 0`
159			`SF_D1.next = 3`
160			`LCD_E1.next = 1`
161
162			`if delay_done:`
163			`state.next = t_State.init_six;`
164			`main_delay_load.next = 1`
165			`main_delay_value.next = 2000`
166
167			`elif state == t_State.init_six:`
168			`main_delay_load.next = 0`
169			`LCD_E1.next = 0`
170
171			`if delay_done:`
172			`state.next = t_State.init_seven;`
173			`main_delay_load.next = 1`
174			`main_delay_value.next = 11`
175
176			`elif state == t_State.init_seven:`
177			`main_delay_load.next = 0`
178			`SF_D1.next = 2`
179			`LCD_E1.next = 1`
180
181			`if delay_done:`
182			`state.next = t_State.init_eight;`
183			`main_delay_load.next = 1`
184			`main_delay_value.next = 2000`
185
186			`elif state == t_State.init_eight:`
187			`main_delay_load.next = 0`
188			`LCD_E1.next = 0`
189
190			`if delay_done:`
191			`state.next = t_State.display_function_set;`
192
193			`elif state == t_State.display_function_set:`
194			`tx_byte.next = 40 #00101000`
195			`if tx_done:`
196			`state.next = t_State.display_entry_set`
197
198			`elif state == t_State.display_entry_set:`
199			`tx_byte.next = 6 #00000110`
200			`if tx_done:`
201			`state.next = t_State.display_set_display`
202
203			`elif state == t_State.display_set_display:`
204			`tx_byte.next = 12 #00001100`
205			`if tx_done:`
206			`state.next = t_State.display_clr_display`
207
208			`elif state == t_State.display_clr_display:`
209			`tx_byte.next = 1 #00000001`
210			`if tx_done:`
211			`state.next = t_State.display_pause_setup`
212			`main_delay_load.next = 1`
213			`main_delay_value.next = 82000`
214
215			`elif state == t_State.display_pause_setup:`
216			`state.next = t_State.display_pause`
217
218			`elif state == t_State.display_pause:`
219			`tx_byte.next = 0 #00000000`
220
221			`if delay_done:`
222			`state.next = t_State.display_done;`
223
224			`elif state == t_State.display_done:`
225			`tx_byte.next = 0 #00000000`
226
227			`if we:`
228			`state.next = t_State.display_set_addr`
229			`else:`
230			`state.next = t_State.display_done`
231
232			`elif state == t_State.display_set_addr:`
233			`tx_byte.next = 128+addr #10000000`
234			`if tx_done:`
235			`state.next = t_State.display_char_write`
236
237			`elif state == t_State.display_char_write:`
238			`tx_byte.next = dat`
239			`if tx_done:`
240			`state.next = t_State.display_done;`
241			`# else:`
242			`# raise ValueError("Undefined Display state")`
243
244
245
246			`@always(clk.posedge, reset.posedge)`
247			`def TxFSM():`
248			`if reset == 1:`
249			`tx_state.next = t_TxState.tx_done`
250			`SF_D0.next = 0`
251			`LCD_E0.next = 0`
252			`else:`
253			`tx_delay_load.next = 0;`
254			`tx_delay_value.next = 0;`
255			`if tx_state == t_TxState.tx_high_setup:`
256			`LCD_E0.next = 0`
257			`SF_D0.next = tx_byte[8 : 4]`
258			`tx_delay_load.next = 0`
259			`if delay_done:`
260			`tx_state.next = t_TxState.tx_high_hold`
261			`tx_delay_load.next = 1`
262			`tx_delay_value.next = 12`
263
264			`elif tx_state == t_TxState.tx_high_hold:`
265			`LCD_E0.next = 1`
266			`SF_D0.next = tx_byte[8 : 4]`
267			`tx_delay_load.next = 0`
268			`if delay_done:`
269			`tx_state.next = t_TxState.tx_oneus`
270			`tx_delay_load.next = 1`
271			`tx_delay_value.next = 50`
272
273			`elif tx_state == t_TxState.tx_oneus:`
274			`LCD_E0.next = 0`
275			`tx_delay_load.next = 0`
276			`if delay_done:`
277			`tx_state.next = t_TxState.tx_low_setup`
278			`tx_delay_load.next = 1`
279			`tx_delay_value.next = 2`
280
281			`elif tx_state == t_TxState.tx_low_setup:`
282			`LCD_E0.next = 0`
283			`SF_D0.next = tx_byte[4 : 0]`
284			`tx_delay_load.next = 0`
285			`if delay_done:`
286			`tx_state.next = t_TxState.tx_low_hold`
287			`tx_delay_load.next = 1`
288			`tx_delay_value.next = 12`
289
290			`elif tx_state == t_TxState.tx_low_hold:`
291			`LCD_E0.next = 1`
292			`SF_D0.next = tx_byte[4 : 0]`
293			`tx_delay_load.next = 0`
294			`if delay_done:`
295			`tx_state.next = t_TxState.tx_fortyus`
296			`tx_delay_load.next = 1`
297			`tx_delay_value.next = 2000`
298
299			`elif tx_state == t_TxState.tx_fortyus:`
300			`LCD_E0.next = 0`
301			`tx_delay_load.next = 0`
302			`if delay_done:`
303			`tx_state.next = t_TxState.tx_done`
304			`tx_done.next = 1`
305
306			`elif tx_state == t_TxState.tx_done:`
307			`LCD_E0.next = 0`
308			`tx_done.next = 0`
309			`tx_delay_load.next = 0`
310			`if tx_init:`
311			`tx_state.next = t_TxState.tx_high_setup`
312			`tx_delay_load.next = 1`
313			`tx_delay_value.next = 2`
314			`# else:`
315			`# raise ValueError("Undefined TX state")`
316
317			`return instances()`
318
319			`def main():`
320			`width = 20`
321
322			`count = Signal(intbv(0)[width:0])`
323			`clk, reset, we, busy, LCD_E, LCD_RS, LCD_RW = [Signal(bool(0)) for i in range(7)]`
324			`dat = Signal(intbv(0)[32:0])`
325			`addr = Signal(intbv(0)[7:0])`
326			`SF_D = Signal(intbv(0)[4:0])`
327
328			`toVerilog(lcd, clk, reset, dat, addr, we, busy, SF_D, LCD_E, LCD_RS, LCD_RW)`
329			`toVHDL(lcd, clk, reset, dat, addr, we, busy, SF_D, LCD_E, LCD_RS, LCD_RW)`
330
331			`if __name__ == '__main__':`
332			`main()`
333