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Commit | Line | Data |
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1 | page 255\r | |
2 | .z80\r | |
3 | \r | |
4 | ;\r | |
5 | ; FIFO channels for communication with avr\r | |
6 | ;\r | |
7 | global ff.init,ff.in,ff.out,ff.i.st,ff.o.st\r | |
8 | \r | |
9 | extrn bufinit\r | |
10 | \r | |
11 | include config.inc\r | |
12 | if CPU_Z180\r | |
13 | include z180reg.inc\r | |
14 | endif\r | |
15 | \r | |
16 | \r | |
17 | ;--------------------------------------------------------------\r | |
18 | \r | |
19 | dseg\r | |
20 | \r | |
21 | \r | |
22 | mkbuf ci.fifo_id, ci.fifo, ci.fifo_len\r | |
23 | mkbuf co.fifo_id, co.fifo, co.fifo_len\r | |
24 | \r | |
25 | \r | |
26 | ;--------------------------------------------------------------\r | |
27 | \r | |
28 | cseg\r | |
29 | \r | |
30 | ; Init Serial I/O for console input and output\r | |
31 | ;\r | |
32 | \r | |
33 | ff.init:\r | |
34 | ld ix,ci.fifo\r | |
35 | call bufinit\r | |
36 | ld ix,co.fifo\r | |
37 | jp bufinit\r | |
38 | \r | |
39 | \r | |
40 | ff.i.st:\r | |
41 | push ix\r | |
42 | ld ix,ci.fifo ;\r | |
43 | \r | |
44 | buf.empty:\r | |
45 | ld a,(ix+o.in_idx) ;\r | |
46 | sub (ix+o.out_idx) ;\r | |
47 | pop ix\r | |
48 | ret z\r | |
49 | or 0ffh\r | |
50 | ret\r | |
51 | \r | |
52 | \r | |
53 | ff.in:\r | |
54 | push ix\r | |
55 | ld ix,ci.fifo ;\r | |
56 | \r | |
57 | buf.get:\r | |
58 | ld a,(ix+o.out_idx) ;\r | |
59 | bg.wait:\r | |
60 | cp (ix+o.in_idx) ;\r | |
61 | jr z,bg.wait\r | |
62 | \r | |
63 | push hl ;\r | |
64 | push ix\r | |
65 | pop hl\r | |
66 | add a,l\r | |
67 | ld l,a\r | |
68 | jr nc,bg.nc\r | |
69 | inc h\r | |
70 | bg.nc:\r | |
71 | ld l,(hl)\r | |
72 | \r | |
73 | ld a,(ix+o.out_idx) ;\r | |
74 | inc a\r | |
75 | and (ix+o.mask)\r | |
76 | ld (ix+o.out_idx),a\r | |
77 | \r | |
78 | ld a,l\r | |
79 | pop hl\r | |
80 | pop ix\r | |
81 | ret\r | |
82 | \r | |
83 | \r | |
84 | ff.o.st:\r | |
85 | push ix\r | |
86 | ld ix,co.fifo ;\r | |
87 | \r | |
88 | buf.full:\r | |
89 | ld a,(ix+o.in_idx) ;\r | |
90 | inc a\r | |
91 | and (ix+o.mask)\r | |
92 | sub (ix+o.out_idx) ;\r | |
93 | pop ix\r | |
94 | ret z\r | |
95 | or 0ffh\r | |
96 | ret\r | |
97 | \r | |
98 | \r | |
99 | if 1\r | |
100 | ff.out:\r | |
101 | push ix ;15\r | |
102 | ld ix,co.fifo ;14\r | |
103 | \r | |
104 | buf.put:\r | |
105 | push hl ;11\r | |
106 | push bc ;11\r | |
107 | push ix ;15\r | |
108 | pop hl ;10\r | |
109 | ld a,c ;4\r | |
110 | ld c,(ix+o.in_idx) ;19\r | |
111 | ld b,0 ;7\r | |
112 | add hl,bc ;11\r | |
113 | ld (hl),a ;7\r | |
114 | ld b,a ;4\r | |
115 | \r | |
116 | ld a,c ;4\r | |
117 | inc a ;4\r | |
118 | and (ix+o.mask) ;19\r | |
119 | bp.wait:\r | |
120 | cp (ix+o.out_idx) ;19\r | |
121 | jr z,bp.wait ;12/7\r | |
122 | ld (ix+o.in_idx),a ;19\r | |
123 | \r | |
124 | out (AVRINT6),a ;11\r | |
125 | ld a,b ;4\r | |
126 | pop bc ;10\r | |
127 | pop hl ;10\r | |
128 | pop ix ;14\r | |
129 | ret ;10\r | |
130 | \r | |
131 | else\r | |
132 | \r | |
133 | ff.out:\r | |
134 | push ix ;15\r | |
135 | ld ix,co.fifo ;14\r | |
136 | \r | |
137 | buf.put:\r | |
138 | push hl ;11\r | |
139 | push ix ;15\r | |
140 | pop hl ;10\r | |
141 | ld a,(ix+o.in_idx) ;19\r | |
142 | add a,l ;4\r | |
143 | ld l,a ;4\r | |
144 | jr nc,bp.1 ;12/7\r | |
145 | inc l ;4\r | |
146 | ld (hl),c ;7\r | |
147 | ld a,(ix+o.in_idx) ;19\r | |
148 | inc a ;4\r | |
149 | and (ix+o.mask) ;19\r | |
150 | bp.wait:\r | |
151 | cp (ix+o.out_idx) ;19\r | |
152 | jr z,bp.wait ;12/7\r | |
153 | ld (ix+o.in_idx),a ;19\r | |
154 | \r | |
155 | out (AVRINT6),a ;11\r | |
156 | ld a,c ;4\r | |
157 | pop hl ;10\r | |
158 | pop ix ;14\r | |
159 | ret ;10 |\r | |
160 | \r | |
161 | endif\r | |
162 | \r | |
163 | end\r |