projects / z180-stamp.git / blame
| Commit | Line | Data |
|---|---|---|
| 6a4e9540 L |
1 | page 255\r |
| 2 | .z80\r | |
| e4c4b148 | 3 | \r |
| 6a4e9540 L |
4 | ;\r |
| 5 | ; FIFO channels for communication with avr\r | |
| 6 | ;\r | |
| 30d1329e | 7 | global ff.init,ff.in,ff.out,ff.i.st,ff.o.st\r |
| 6a4e9540 L |
8 | \r |
| 9 | extrn buf.init\r | |
| 10 | \r | |
| 11 | include config.inc\r | |
| 64cc2207 | 12 | if CPU_Z180\r |
| 6a4e9540 | 13 | include z180reg.inc\r |
| 64cc2207 | 14 | endif\r |
| 6a4e9540 L |
15 | \r |
| 16 | \r | |
| 17 | ;--------------------------------------------------------------\r | |
| 18 | \r | |
| 19 | dseg\r | |
| 6a4e9540 | 20 | \r |
| e4c4b148 | 21 | \r |
| e4c4b148 | 22 | mkbuf ci.fifo_id, ci.fifo, ci.fifo_len\r |
| ad9bc17c | 23 | mkbuf co.fifo_id, co.fifo, co.fifo_len\r |
| 6a4e9540 L |
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 | ld a,ci.fifo.mask\r | |
| 36 | call buf.init\r | |
| 37 | ld ix,co.fifo\r | |
| 38 | ld a,co.fifo.mask\r | |
| 39 | jp buf.init\r | |
| 40 | \r | |
| 41 | \r | |
| 42 | ff.i.st:\r | |
| 43 | push ix\r | |
| 44 | ld ix,ci.fifo ;\r | |
| 45 | \r | |
| 46 | buf.empty:\r | |
| 47 | ld a,(ix+o.in_idx) ;\r | |
| 48 | sub (ix+o.out_idx) ;\r | |
| 49 | pop ix\r | |
| 50 | ret z\r | |
| 51 | or 0ffh\r | |
| 52 | ret\r | |
| e4c4b148 | 53 | \r |
| 6a4e9540 L |
54 | \r |
| 55 | ff.in:\r | |
| 56 | push ix\r | |
| 57 | ld ix,ci.fifo ;\r | |
| 58 | \r | |
| 59 | buf.get:\r | |
| 60 | ld a,(ix+o.out_idx) ;\r | |
| 61 | bg.wait:\r | |
| 62 | cp (ix+o.in_idx) ;\r | |
| 63 | jr z,bg.wait\r | |
| 64 | \r | |
| 65 | push hl ;\r | |
| 66 | push ix\r | |
| 67 | pop hl\r | |
| 68 | add a,l\r | |
| 69 | ld l,a\r | |
| 70 | jr nc,bg.nc\r | |
| 71 | inc h\r | |
| 72 | bg.nc:\r | |
| 73 | ld l,(hl)\r | |
| e4c4b148 | 74 | \r |
| 6a4e9540 L |
75 | ld a,(ix+o.out_idx) ;\r |
| 76 | inc a\r | |
| 77 | and (ix+o.mask)\r | |
| 78 | ld (ix+o.out_idx),a\r | |
| e4c4b148 | 79 | \r |
| 6a4e9540 L |
80 | ld a,l\r |
| 81 | pop hl\r | |
| 82 | pop ix\r | |
| 83 | ret\r | |
| 84 | \r | |
| 85 | \r | |
| 86 | ff.o.st:\r | |
| 87 | push ix\r | |
| 88 | ld ix,co.fifo ;\r | |
| 89 | \r | |
| 90 | buf.full:\r | |
| 91 | ld a,(ix+o.in_idx) ;\r | |
| 92 | inc a\r | |
| 93 | and (ix+o.mask)\r | |
| 94 | sub (ix+o.out_idx) ;\r | |
| 95 | pop ix\r | |
| 96 | ret z\r | |
| 97 | or 0ffh\r | |
| 98 | ret\r | |
| 99 | \r | |
| 100 | \r | |
| 64cc2207 | 101 | if 1\r |
| 6a4e9540 | 102 | ff.out:\r |
| 64cc2207 L |
103 | push ix ;15\r |
| 104 | ld ix,co.fifo ;14\r | |
| 6a4e9540 L |
105 | \r |
| 106 | buf.put:\r | |
| 64cc2207 L |
107 | push hl ;11\r |
| 108 | push bc ;11\r | |
| 109 | push ix ;15\r | |
| 110 | pop hl ;10\r | |
| 111 | ld a,c ;4\r | |
| 112 | ld c,(ix+o.in_idx) ;19\r | |
| 113 | ld b,0 ;7\r | |
| 114 | add hl,bc ;11\r | |
| 115 | ld (hl),a ;7\r | |
| 116 | ld b,a ;4\r | |
| 117 | \r | |
| 118 | ld a,c ;4\r | |
| 119 | inc a ;4\r | |
| 120 | and (ix+o.mask) ;19\r | |
| 6a4e9540 | 121 | bp.wait:\r |
| 64cc2207 L |
122 | cp (ix+o.out_idx) ;19\r |
| 123 | jr z,bp.wait ;12/7\r | |
| 124 | ld (ix+o.in_idx),a ;19\r | |
| e4c4b148 | 125 | \r |
| 64cc2207 L |
126 | out (AVRINT6),a ;11\r |
| 127 | ld a,b ;4\r | |
| 128 | pop bc ;10\r | |
| 129 | pop hl ;10\r | |
| 130 | pop ix ;14\r | |
| 131 | ret ;10\r | |
| 132 | \r | |
| 133 | else\r | |
| 134 | \r | |
| 135 | ff.out:\r | |
| 136 | push ix ;15\r | |
| 137 | ld ix,co.fifo ;14\r | |
| 138 | \r | |
| 139 | buf.put:\r | |
| 140 | push hl ;11\r | |
| 141 | push ix ;15\r | |
| 142 | pop hl ;10\r | |
| 143 | ld a,(ix+o.in_idx) ;19\r | |
| 144 | add a,l ;4\r | |
| 145 | ld l,a ;4\r | |
| 146 | jr nc,bp.1 ;12/7\r | |
| 147 | inc l ;4\r | |
| 148 | ld (hl),c ;7\r | |
| 149 | ld a,(ix+o.in_idx) ;19\r | |
| 150 | inc a ;4\r | |
| 151 | and (ix+o.mask) ;19\r | |
| 152 | bp.wait:\r | |
| 153 | cp (ix+o.out_idx) ;19\r | |
| 154 | jr z,bp.wait ;12/7\r | |
| 155 | ld (ix+o.in_idx),a ;19\r | |
| 156 | \r | |
| 157 | out (AVRINT6),a ;11\r | |
| 158 | ld a,c ;4\r | |
| 159 | pop hl ;10\r | |
| 160 | pop ix ;14\r | |
| 161 | ret ;10 |\r | |
| 162 | \r | |
| 163 | endif\r | |
| 6a4e9540 L |
164 | \r |
| 165 | end\r |