tests/tmp105-test.c

   1 /*
   2  * QTest testcase for the TMP105 temperature sensor
   3  *
   4  * Copyright (c) 2012 Andreas Färber
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9 #include "libqtest.h"
  10 #include "libi2c.h"
  11 #include "hw/tmp105_regs.h"
  12
  13 #include <glib.h>
  14
  15 #define OMAP2_I2C_1_BASE 0x48070000
  16
  17 #define N8X0_ADDR 0x48
  18
  19 static I2CAdapter *i2c;
  20 static uint8_t addr;
  21
  22 static void send_and_receive(void)
  23 {
  24     uint8_t cmd[3];
  25     uint8_t resp[2];
  26
  27     cmd[0] = TMP105_REG_TEMPERATURE;
  28     i2c_send(i2c, addr, cmd, 1);
  29     i2c_recv(i2c, addr, resp, 2);
  30     g_assert_cmpuint(((uint16_t)resp[0] << 8) | resp[1], ==, 0);
  31
  32     cmd[0] = TMP105_REG_CONFIG;
  33     cmd[1] = 0x0; /* matches the reset value */
  34     i2c_send(i2c, addr, cmd, 2);
  35     i2c_recv(i2c, addr, resp, 1);
  36     g_assert_cmphex(resp[0], ==, cmd[1]);
  37
  38     cmd[0] = TMP105_REG_T_LOW;
  39     cmd[1] = 0x12;
  40     cmd[2] = 0x34;
  41     i2c_send(i2c, addr, cmd, 3);
  42     i2c_recv(i2c, addr, resp, 2);
  43     g_assert_cmphex(resp[0], ==, cmd[1]);
  44     g_assert_cmphex(resp[1], ==, cmd[2]);
  45
  46     cmd[0] = TMP105_REG_T_HIGH;
  47     cmd[1] = 0x42;
  48     cmd[2] = 0x31;
  49     i2c_send(i2c, addr, cmd, 3);
  50     i2c_recv(i2c, addr, resp, 2);
  51     g_assert_cmphex(resp[0], ==, cmd[1]);
  52     g_assert_cmphex(resp[1], ==, cmd[2]);
  53 }
  54
  55 int main(int argc, char **argv)
  56 {
  57     QTestState *s = NULL;
  58     int ret;
  59
  60     g_test_init(&argc, &argv, NULL);
  61
  62     s = qtest_start("-display none -machine n800");
  63     i2c = omap_i2c_create(OMAP2_I2C_1_BASE);
  64     addr = N8X0_ADDR;
  65
  66     qtest_add_func("/tmp105/tx-rx", send_and_receive);
  67
  68     ret = g_test_run();
  69
  70     if (s) {
  71         qtest_quit(s);
  72     }
  73     g_free(i2c);
  74
  75     return ret;
  76 }