#include "dro.h"Include dependency graph for dro.c:
Go to the source code of this file.
Defines | |
| #define | inportb(port) (0) |
| #define | outportb(port, val) {printf("outportb(%d (0x%X),%d)\n",port,port,val);} |
| #define | CLOCK_DATA 0x0E |
| #define | CLOCK_SETUP 0x98 |
| #define | INPUT_SETUP 0xC1 |
| #define | QUAD_X1 0xA8 |
| #define | QUAD_X2 0xB0 |
| #define | QUAD_X4 0xB8 |
| #define | BP_RESET 0x01 |
| #define | BP_RESETB 0x81 |
| #define | CNTR_RESET 0x02 |
| #define | CNTR_RESETB 0x82 |
| #define | TRSFRPR_CNTR 0x08 |
| #define | TRSFRCNTR_OL 0x90 |
| #define | EFLAG_RESET 0x86 |
| #define | INDEX_DISABLE 0xE0 |
| #define | DATA(x) (BASE7266 + (2 * x)) |
| #define | CTRL(x) (BASE7266 + (2 * x) + 1) |
Functions | |
| int | LS7266Init () |
| long | LS7266Read (int i) |
| void | LS7266Write (int i, long in) |
Variables | |
| int | BASE7266 = 0x200 |
| int | Present [4] = {1, 1, 1, 1} |
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Definition at line 95 of file dro.c. Referenced by LS7266Init(), LS7266Read(), and LS7266Write().
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Definition at line 94 of file dro.c. Referenced by LS7266Init(), LS7266Read(), and LS7266Write().
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Definition at line 71 of file dro.c. Referenced by LS7266Init(), and LS7266Read().
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Definition at line 72 of file dro.c. Referenced by LS7266Init(), LS7266Read(), and LS7266Write().
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Definition at line 102 of file dro.c. Referenced by __attribute__().
00103 {
00104 int t;
00105
00106 for (t = 0; t < 4; t++) {
00107 /* set present flag to true, clear it later if not there */
00108 Present[t] = 1;
00109
00110 /* if even, initialize chip half */
00111 if (! t % 2) {
00112 outportb(CTRL(t), INDEX_DISABLE);
00113 outportb(CTRL(t), EFLAG_RESET);
00114 outportb(CTRL(t), BP_RESETB);
00115 outportb(DATA(t), CLOCK_DATA);
00116 outportb(CTRL(t), CLOCK_SETUP);
00117 outportb(CTRL(t), INPUT_SETUP);
00118 outportb(CTRL(t), QUAD_X4);
00119 outportb(CTRL(t), CNTR_RESETB);
00120
00121 outportb(CTRL(t), 184);
00122 outportb(CTRL(t), 135);
00123 outportb(CTRL(t), 133);
00124 outportb(CTRL(t), 131);
00125 outportb(CTRL(t), 193);
00126 outportb(CTRL(t), 224);
00127 }
00128
00129 /* initialize encoder input */
00130 outportb(CTRL(t), BP_RESET);
00131 outportb(DATA(t), 3 * t + 1);
00132 outportb(DATA(t), 3 * t + 2);
00133 outportb(DATA(t), 3 * t + 3);
00134
00135 outportb(CTRL(t), TRSFRPR_CNTR);
00136 outportb(CTRL(t), TRSFRCNTR_OL);
00137 outportb(CTRL(t), CNTR_RESET);
00138
00139 outportb(CTRL(t), BP_RESET);
00140 if (inportb(DATA(t)) != 3 * t + 1) {
00141 Present[t] = 0;
00142 }
00143 if (inportb(DATA(t)) != 3 * t + 2) {
00144 Present[t] = 0;
00145 }
00146 if (inportb(DATA(t)) != 3 * t + 3) {
00147 Present[t] = 0;
00148 }
00149 }
00150
00151 if (Present[0] || Present[1] || Present[2] || Present[3]) {
00152 return 0;
00153 }
00154
00155 return -1;
00156 }
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Definition at line 161 of file dro.c. 00162 {
00163 union pos_tag {
00164 long l;
00165 struct byte_tag { char b0; char b1; char b2; char b3;} byte;
00166 } pos;
00167
00168 outportb(CTRL(i), TRSFRCNTR_OL);
00169 outportb(CTRL(i), BP_RESET);
00170 pos.byte.b0=inportb(DATA(i));
00171 pos.byte.b1=inportb(DATA(i));
00172 pos.byte.b2=inportb(DATA(i));
00173 if (pos.byte.b2 < 0) {
00174 pos.byte.b3 = -1;
00175 }
00176 else {
00177 pos.byte.b3 = 0;
00178 }
00179
00180 return pos.l;
00181 }
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Definition at line 186 of file dro.c. 00187 {
00188 union pos_tag {
00189 long l;
00190 struct byte_tag { char b0; char b1; char b2; char b3;} byte;
00191 } pos;
00192
00193 pos.l = in;
00194 outportb(CTRL(i), BP_RESET);
00195 outportb(DATA(i), pos.byte.b0);
00196 outportb(DATA(i), pos.byte.b1);
00197 outportb(DATA(i), pos.byte.b2);
00198 outportb(CTRL(i), TRSFRPR_CNTR);
00199 outportb(CTRL(i), TRSFRCNTR_OL);
00200 outportb(CTRL(i), BP_RESET);
00201
00202 return;
00203 }
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1.2.11.1 written by Dimitri van Heesch,
© 1997-2001