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

Subversion Repositories wb_lcd

[/] [wb_lcd/] [trunk/] [myhdl/] [wb_lcd_workspace/] [workspace/] [lcd_display/] [src/] [lcd_display.py] - 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_set_addr1', 'display_char_write1', 'display_set_addr2', 'display_char_write2','display_done')
 
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, repaint, 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])
    pos = Signal(intbv(0)[9:0])
    MEM_LOW1 =0
    MEM_HIGH1 =15
    MEM_LOW2 =64
    MEM_HIGH2 =79
 
    @always_comb
    def busy_and_rw_handlers():
        busy.next = (state != t_State.display_done)
        LCD_RW.next = 0
 
    # Memory interface
    ram = [Signal(intbv(0)[8:0]) for i in range(80)]
 
    @always(clk.posedge)
    def memWrite():
        if we:
            ram[int(addr)].next = dat
 
 
    #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_addr1) | (state == t_State.display_char_write1) | (state == t_State.display_set_addr2) | (state == t_State.display_char_write2))
        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_addr1) | (state == t_State.display_set_addr2))
 
    @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
            pos.next = MEM_LOW1
        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_set_addr1;
 
            elif state == t_State.display_set_addr1:
                tx_byte.next = 128 #10000000
                if tx_done:
                    state.next = t_State.display_char_write1
                    pos.next = MEM_LOW1
 
            elif state == t_State.display_char_write1:
                tx_byte.next = ram[pos]
                if tx_done:
                    if pos == MEM_HIGH1:
                        state.next = t_State.display_set_addr2;
                    else:
                        pos.next = pos + 1
            elif state == t_State.display_set_addr2:
                tx_byte.next = 192 #11000000
                if tx_done:
                    state.next = t_State.display_char_write2
                    pos.next = MEM_LOW2
 
            elif state == t_State.display_char_write2:
                tx_byte.next = ram[pos]
                if tx_done:
                    if pos == MEM_HIGH2:
                        state.next = t_State.display_done;
                    else:
                        pos.next = pos + 1
 
            elif state == t_State.display_done:
                tx_byte.next = 0 #00000000
 
                if repaint:
                    state.next = t_State.display_function_set
                else:
                    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, repaint, busy, LCD_E, LCD_RS, LCD_RW = [Signal(bool(0)) for i in range(8)]
    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, repaint, busy, SF_D, LCD_E, LCD_RS, LCD_RW)
    toVHDL(lcd, clk, reset, dat, addr, we, repaint, 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/] [workspace/] [lcd_display/] [src/] [lcd_display.py] - 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_set_addr1', 'display_char_write1', 'display_set_addr2', 'display_char_write2','display_done')`
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, repaint, 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			`pos = Signal(intbv(0)[9:0])`
38			`MEM_LOW1 =0`
39			`MEM_HIGH1 =15`
40			`MEM_LOW2 =64`
41			`MEM_HIGH2 =79`
42
43			`@always_comb`
44			`def busy_and_rw_handlers():`
45			`busy.next = (state != t_State.display_done)`
46			`LCD_RW.next = 0`
47
48			`# Memory interface`
49			`ram = [Signal(intbv(0)[8:0]) for i in range(80)]`
50
51			`@always(clk.posedge)`
52			`def memWrite():`
53			`if we:`
54			`ram[int(addr)].next = dat`
55
56
57			`#Delay counter`
58			`main_delay_load = Signal(bool())`
59			`main_delay_value = Signal(intbv(0)[20:0])`
60
61			`tx_delay_load = Signal(bool())`
62			`main_delay_load = Signal(bool())`
63			`delay_load = Signal(bool())`
64
65			`tx_delay_value = Signal(intbv(0)[20:0])`
66			`main_delay_value = Signal(intbv(0)[20:0])`
67			`delay_value = Signal(intbv(0)[20:0])`
68
69			`delay_done = Signal(bool())`
70			`output_selector = Signal(bool())`
71			`counter = delayCounter(clk, reset, delay_value, delay_load, delay_done, width = 21)`
72
73			`@always_comb`
74			`def conunter_sharing_load():`
75			`delay_load.next = tx_delay_load or main_delay_load`
76
77			`@always_comb`
78			`def conunter_sharing_value():`
79			`if tx_delay_load:`
80			`delay_value.next = tx_delay_value`
81			`else:`
82			`delay_value.next = main_delay_value`
83
84
85			`# SF_D and LCD_E management for sharing between Init and TX phases.`
86			`@always_comb`
87			`def output_tx_or_init_select(): # 0 tx; 1 init`
88			`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)`
89
90			`@always_comb`
91			`def output_tx_or_init_mux():`
92			`if output_selector: # Init`
93			`SF_D.next = SF_D1`
94			`LCD_E.next = LCD_E1`
95			`else: # TX`
96			`SF_D.next = SF_D0`
97			`LCD_E.next = LCD_E0`
98
99
100			`@always_comb`
101			`def init_transmissions():`
102			`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_addr1) \| (state == t_State.display_char_write1) \| (state == t_State.display_set_addr2) \| (state == t_State.display_char_write2))`
103			`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_addr1) \| (state == t_State.display_set_addr2))`
104
105			`@always(clk.posedge, reset.posedge)`
106			`def DisplayFSM():`
107			`if reset == 1:`
108			`state.next = t_State.display_init`
109			`main_delay_load.next = 0`
110			`main_delay_value.next = 0`
111			`SF_D1.next = 0`
112			`LCD_E1.next = 0`
113			`tx_byte.next = 0`
114			`pos.next = MEM_LOW1`
115			`else:`
116			`main_delay_load.next = 0;`
117			`main_delay_value.next = 0;`
118			`if state == t_State.display_init:`
119			`tx_byte.next = 0 #00000000`
120
121			`state.next = t_State.init_fifteenms`
122			`main_delay_load.next = 1`
123			`main_delay_value.next = 750000`
124
125			`elif state == t_State.init_fifteenms:`
126			`main_delay_load.next = 0`
127
128			`if delay_done:`
129			`state.next = t_State.init_one;`
130			`main_delay_load.next = 1`
131			`main_delay_value.next = 11`
132
133			`elif state == t_State.init_one:`
134			`main_delay_load.next = 0`
135			`SF_D1.next = 3`
136			`LCD_E1.next = 1`
137
138			`if delay_done:`
139			`state.next = t_State.init_two;`
140			`main_delay_load.next = 1`
141			`main_delay_value.next = 205000`
142
143			`elif state == t_State.init_two:`
144			`main_delay_load.next = 0`
145			`LCD_E1.next = 0`
146
147			`if delay_done:`
148			`state.next = t_State.init_three;`
149			`main_delay_load.next = 1`
150			`main_delay_value.next = 11`
151
152			`elif state == t_State.init_three:`
153			`main_delay_load.next = 0`
154			`SF_D1.next = 3`
155			`LCD_E1.next = 1`
156
157			`if delay_done:`
158			`state.next = t_State.init_four;`
159			`main_delay_load.next = 1`
160			`main_delay_value.next = 5000`
161
162			`elif state == t_State.init_four:`
163			`main_delay_load.next = 0`
164			`LCD_E1.next = 0`
165
166			`if delay_done:`
167			`state.next = t_State.init_five;`
168			`main_delay_load.next = 1`
169			`main_delay_value.next = 11`
170
171
172			`elif state == t_State.init_five:`
173			`main_delay_load.next = 0`
174			`SF_D1.next = 3`
175			`LCD_E1.next = 1`
176
177			`if delay_done:`
178			`state.next = t_State.init_six;`
179			`main_delay_load.next = 1`
180			`main_delay_value.next = 2000`
181
182			`elif state == t_State.init_six:`
183			`main_delay_load.next = 0`
184			`LCD_E1.next = 0`
185
186			`if delay_done:`
187			`state.next = t_State.init_seven;`
188			`main_delay_load.next = 1`
189			`main_delay_value.next = 11`
190
191			`elif state == t_State.init_seven:`
192			`main_delay_load.next = 0`
193			`SF_D1.next = 2`
194			`LCD_E1.next = 1`
195
196			`if delay_done:`
197			`state.next = t_State.init_eight;`
198			`main_delay_load.next = 1`
199			`main_delay_value.next = 2000`
200
201			`elif state == t_State.init_eight:`
202			`main_delay_load.next = 0`
203			`LCD_E1.next = 0`
204
205			`if delay_done:`
206			`state.next = t_State.display_function_set;`
207
208			`elif state == t_State.display_function_set:`
209			`tx_byte.next = 40 #00101000`
210			`if tx_done:`
211			`state.next = t_State.display_entry_set`
212
213			`elif state == t_State.display_entry_set:`
214			`tx_byte.next = 6 #00000110`
215			`if tx_done:`
216			`state.next = t_State.display_set_display`
217
218			`elif state == t_State.display_set_display:`
219			`tx_byte.next = 12 #00001100`
220			`if tx_done:`
221			`state.next = t_State.display_clr_display`
222
223			`elif state == t_State.display_clr_display:`
224			`tx_byte.next = 1 #00000001`
225			`if tx_done:`
226			`state.next = t_State.display_pause_setup`
227			`main_delay_load.next = 1`
228			`main_delay_value.next = 82000`
229
230			`elif state == t_State.display_pause_setup:`
231			`state.next = t_State.display_pause`
232
233			`elif state == t_State.display_pause:`
234			`tx_byte.next = 0 #00000000`
235
236			`if delay_done:`
237			`state.next = t_State.display_set_addr1;`
238
239			`elif state == t_State.display_set_addr1:`
240			`tx_byte.next = 128 #10000000`
241			`if tx_done:`
242			`state.next = t_State.display_char_write1`
243			`pos.next = MEM_LOW1`
244
245			`elif state == t_State.display_char_write1:`
246			`tx_byte.next = ram[pos]`
247			`if tx_done:`
248			`if pos == MEM_HIGH1:`
249			`state.next = t_State.display_set_addr2;`
250			`else:`
251			`pos.next = pos + 1`
252			`elif state == t_State.display_set_addr2:`
253			`tx_byte.next = 192 #11000000`
254			`if tx_done:`
255			`state.next = t_State.display_char_write2`
256			`pos.next = MEM_LOW2`
257
258			`elif state == t_State.display_char_write2:`
259			`tx_byte.next = ram[pos]`
260			`if tx_done:`
261			`if pos == MEM_HIGH2:`
262			`state.next = t_State.display_done;`
263			`else:`
264			`pos.next = pos + 1`
265
266			`elif state == t_State.display_done:`
267			`tx_byte.next = 0 #00000000`
268
269			`if repaint:`
270			`state.next = t_State.display_function_set`
271			`else:`
272			`state.next = t_State.display_done`
273
274			`# else:`
275
276			`# raise ValueError("Undefined Display state")`
277
278
279
280			`@always(clk.posedge, reset.posedge)`
281			`def TxFSM():`
282			`if reset == 1:`
283			`tx_state.next = t_TxState.tx_done`
284			`SF_D0.next = 0`
285			`LCD_E0.next = 0`
286			`else:`
287			`tx_delay_load.next = 0;`
288			`tx_delay_value.next = 0;`
289			`if tx_state == t_TxState.tx_high_setup:`
290			`LCD_E0.next = 0`
291			`SF_D0.next = tx_byte[8 : 4]`
292			`tx_delay_load.next = 0`
293			`if delay_done:`
294			`tx_state.next = t_TxState.tx_high_hold`
295			`tx_delay_load.next = 1`
296			`tx_delay_value.next = 12`
297
298			`elif tx_state == t_TxState.tx_high_hold:`
299			`LCD_E0.next = 1`
300			`SF_D0.next = tx_byte[8 : 4]`
301			`tx_delay_load.next = 0`
302			`if delay_done:`
303			`tx_state.next = t_TxState.tx_oneus`
304			`tx_delay_load.next = 1`
305			`tx_delay_value.next = 50`
306
307			`elif tx_state == t_TxState.tx_oneus:`
308			`LCD_E0.next = 0`
309			`tx_delay_load.next = 0`
310			`if delay_done:`
311			`tx_state.next = t_TxState.tx_low_setup`
312			`tx_delay_load.next = 1`
313			`tx_delay_value.next = 2`
314
315			`elif tx_state == t_TxState.tx_low_setup:`
316			`LCD_E0.next = 0`
317			`SF_D0.next = tx_byte[4 : 0]`
318			`tx_delay_load.next = 0`
319			`if delay_done:`
320			`tx_state.next = t_TxState.tx_low_hold`
321			`tx_delay_load.next = 1`
322			`tx_delay_value.next = 12`
323
324			`elif tx_state == t_TxState.tx_low_hold:`
325			`LCD_E0.next = 1`
326			`SF_D0.next = tx_byte[4 : 0]`
327			`tx_delay_load.next = 0`
328			`if delay_done:`
329			`tx_state.next = t_TxState.tx_fortyus`
330			`tx_delay_load.next = 1`
331			`tx_delay_value.next = 2000`
332
333			`elif tx_state == t_TxState.tx_fortyus:`
334			`LCD_E0.next = 0`
335			`tx_delay_load.next = 0`
336			`if delay_done:`
337			`tx_state.next = t_TxState.tx_done`
338			`tx_done.next = 1`
339
340			`elif tx_state == t_TxState.tx_done:`
341			`LCD_E0.next = 0`
342			`tx_done.next = 0`
343			`tx_delay_load.next = 0`
344			`if tx_init:`
345			`tx_state.next = t_TxState.tx_high_setup`
346			`tx_delay_load.next = 1`
347			`tx_delay_value.next = 2`
348			`# else:`
349			`# raise ValueError("Undefined TX state")`
350
351			`return instances()`
352
353			`def main():`
354			`width = 20`
355
356			`count = Signal(intbv(0)[width:0])`
357			`clk, reset, we, repaint, busy, LCD_E, LCD_RS, LCD_RW = [Signal(bool(0)) for i in range(8)]`
358			`dat = Signal(intbv(0)[32:0])`
359			`addr = Signal(intbv(0)[7:0])`
360			`SF_D = Signal(intbv(0)[4:0])`
361
362			`#toVerilog(lcd, clk, reset, dat, addr, we, repaint, busy, SF_D, LCD_E, LCD_RS, LCD_RW)`
363			`toVHDL(lcd, clk, reset, dat, addr, we, repaint, busy, SF_D, LCD_E, LCD_RS, LCD_RW)`
364
365			`if __name__ == '__main__':`
366			`main()`
367