test/test_1w.c

   1 /* Author: Domen Puncer <domen@cba.si>.  License: WTFPL, see file LICENSE */
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 #include <sched.h>
   6
   7 #include <drivers/1w.h>
   8 //#include <drivers/ds2482_1w.h>
   9 #include <drivers/bitbang_1w.h>
  10
  11
  12 void test_1w_func(u32 arg)
  13 {
  14         int pin = arg;
  15         int i;
  16 #if 0
  17         struct ds2482_data ds2482_data = {
  18                 .i2c = &i2c0,
  19                 .addr = 0x1b,
  20         };
  21         struct w1_master _w1, *w1 = &_w1;
  22         w1->priv = &ds2482_data;
  23         ds2482_1w_register(w1);
  24 #else
  25         struct bitbang_1w_data bitbang_1w_data = {
  26                 .pin = pin,
  27         };
  28         struct w1_master _w1, *w1 = &_w1;
  29         w1->priv = &bitbang_1w_data;
  30         bitbang_1w_register(w1);
  31 #endif
  32
  33         w1_addr_t addrs[5];
  34         int n = w1_scan(w1, addrs, 5);
  35         printf("found %i 1-wire devices:\n", n);
  36         for (i=0; i<n; i++) {
  37                 u8 *b = addrs[i].bytes;
  38                 printf(" %02x%02x%02x%02x%02x%02x%02x%02x\n",
  39                                 b[0], b[1], b[2], b[3],
  40                                 b[4], b[5], b[6], b[7]);
  41         }
  42
  43         n = w1_read_rom(w1, &addrs[0]);
  44         printf("read_rom: %i\n", n);
  45         u8 *b = addrs[0].bytes;
  46         printf(" %02x%02x%02x%02x%02x%02x%02x%02x\n",
  47                         b[0], b[1], b[2], b[3],
  48                         b[4], b[5], b[6], b[7]);
  49
  50
  51         /* some example code for ds2890 1-wire digital potentiometer */
  52         w1_addr_t pot;
  53 //      2c7147070000007b
  54         memcpy(pot.bytes, "\x2c\x71\x47\x07\x00\x00\x00\x7b", 8);
  55
  56         /* read ctrl */
  57         w1_match_rom(w1, pot);
  58         w1_write(w1, '\xaa');
  59         u8 tmp1 = w1_read(w1);
  60         u8 tmp2 = w1_read(w1);
  61         printf("%s, 1w: feat:%02x, ctrl:%02x\n", __func__, tmp1, tmp2);
  62
  63         /* read position */
  64         w1_match_rom(w1, pot);
  65         w1_write(w1, '\xf0');
  66         tmp1 = w1_read(w1);
  67         tmp2 = w1_read(w1);
  68         printf("%s, 1w: ctrl:%02x, wiper:%02x\n", __func__, tmp1, tmp2);
  69
  70         /* write position */
  71         w1_match_rom(w1, pot);
  72         w1_write(w1, '\x0f');
  73         w1_write(w1, '\xf0');
  74         tmp1 = w1_read(w1);
  75         if (tmp1 == '\xf0')
  76                 w1_write(w1, '\x96'); /* release code */
  77         printf("%s, 1w: new pos:%02x\n", __func__, tmp1);
  78
  79         /* prepare for inc/dec */
  80         w1_match_rom(w1, pot);
  81         while (1) {
  82                 if (i % 32 < 20)
  83                         w1_write(w1, '\x99');
  84                 else
  85                         w1_write(w1, '\xc3');
  86                 printf("%s, %i, wiper pos:%02x\n", __func__, i++, w1_read(w1));
  87
  88                 msleep(1000);
  89         }
  90 }