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
  10 #include <glib.h>
  11
  12 #include "libqtest.h"
  13 #include "libqos/i2c.h"
  14 #include "hw/misc/tmp105_regs.h"
  15
  16 #define OMAP2_I2C_1_BASE 0x48070000
  17
  18 #define N8X0_ADDR 0x48
  19
  20 static I2CAdapter *i2c;
  21 static uint8_t addr;
  22
  23 static void send_and_receive(void)
  24 {
  25     uint8_t cmd[3];
  26     uint8_t resp[2];
  27
  28     cmd[0] = TMP105_REG_TEMPERATURE;
  29     i2c_send(i2c, addr, cmd, 1);
  30     i2c_recv(i2c, addr, resp, 2);
  31     g_assert_cmpuint(((uint16_t)resp[0] << 8) | resp[1], ==, 0);
  32
  33     cmd[0] = TMP105_REG_CONFIG;
  34     cmd[1] = 0x0; /* matches the reset value */
  35     i2c_send(i2c, addr, cmd, 2);
  36     i2c_recv(i2c, addr, resp, 1);
  37     g_assert_cmphex(resp[0], ==, cmd[1]);
  38
  39     cmd[0] = TMP105_REG_T_LOW;
  40     cmd[1] = 0x12;
  41     cmd[2] = 0x34;
  42     i2c_send(i2c, addr, cmd, 3);
  43     i2c_recv(i2c, addr, resp, 2);
  44     g_assert_cmphex(resp[0], ==, cmd[1]);
  45     g_assert_cmphex(resp[1], ==, cmd[2]);
  46
  47     cmd[0] = TMP105_REG_T_HIGH;
  48     cmd[1] = 0x42;
  49     cmd[2] = 0x31;
  50     i2c_send(i2c, addr, cmd, 3);
  51     i2c_recv(i2c, addr, resp, 2);
  52     g_assert_cmphex(resp[0], ==, cmd[1]);
  53     g_assert_cmphex(resp[1], ==, cmd[2]);
  54 }
  55
  56 int main(int argc, char **argv)
  57 {
  58     QTestState *s = NULL;
  59     int ret;
  60
  61     g_test_init(&argc, &argv, NULL);
  62
  63     s = qtest_start("-machine n800");
  64     i2c = omap_i2c_create(OMAP2_I2C_1_BASE);
  65     addr = N8X0_ADDR;
  66
  67     qtest_add_func("/tmp105/tx-rx", send_and_receive);
  68
  69     ret = g_test_run();
  70
  71     if (s) {
  72         qtest_quit(s);
  73     }
  74     g_free(i2c);
  75
  76     return ret;
  77 }