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 "qemu/osdep.h"
  11
  12 #include "libqtest.h"
  13 #include "libqos/qgraph.h"
  14 #include "libqos/i2c.h"
  15 #include "qapi/qmp/qdict.h"
  16 #include "hw/misc/tmp105_regs.h"
  17
  18 #define TMP105_TEST_ID   "tmp105-test"
  19 #define TMP105_TEST_ADDR 0x49
  20
  21 static int qmp_tmp105_get_temperature(const char *id)
  22 {
  23     QDict *response;
  24     int ret;
  25
  26     response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
  27                    "'property': 'temperature' } }", id);
  28     g_assert(qdict_haskey(response, "return"));
  29     ret = qdict_get_int(response, "return");
  30     qobject_unref(response);
  31     return ret;
  32 }
  33
  34 static void qmp_tmp105_set_temperature(const char *id, int value)
  35 {
  36     QDict *response;
  37
  38     response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
  39                    "'property': 'temperature', 'value': %d } }", id, value);
  40     g_assert(qdict_haskey(response, "return"));
  41     qobject_unref(response);
  42 }
  43
  44 #define TMP105_PRECISION (1000/16)
  45 static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
  46 {
  47     uint16_t value;
  48     QI2CDevice *i2cdev = (QI2CDevice *)obj;
  49
  50     value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
  51     g_assert_cmpuint(value, ==, 0);
  52
  53     value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
  54     g_assert_cmphex(value, ==, 0);
  55
  56     qmp_tmp105_set_temperature(TMP105_TEST_ID, 20000);
  57     value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
  58     g_assert_cmpuint(value, ==, 20000);
  59
  60     value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
  61     g_assert_cmphex(value, ==, 0x1400);
  62
  63     qmp_tmp105_set_temperature(TMP105_TEST_ID, 20938); /* 20 + 15/16 */
  64     value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
  65     g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2);
  66     g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
  67
  68     /* Set config */
  69     i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x60);
  70     value = i2c_get8(i2cdev, TMP105_REG_CONFIG);
  71     g_assert_cmphex(value, ==, 0x60);
  72
  73     value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
  74     g_assert_cmphex(value, ==, 0x14f0);
  75
  76     /* Set precision to 9, 10, 11 bits.  */
  77     i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x00);
  78     g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x00);
  79     value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
  80     g_assert_cmphex(value, ==, 0x1480);
  81
  82     i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x20);
  83     g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x20);
  84     value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
  85     g_assert_cmphex(value, ==, 0x14c0);
  86
  87     i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x40);
  88     g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x40);
  89     value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
  90     g_assert_cmphex(value, ==, 0x14e0);
  91
  92     /* stored precision remains the same */
  93     value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
  94     g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2);
  95     g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
  96
  97     i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x60);
  98     g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x60);
  99     value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
 100     g_assert_cmphex(value, ==, 0x14f0);
 101
 102     i2c_set16(i2cdev, TMP105_REG_T_LOW, 0x1234);
 103     g_assert_cmphex(i2c_get16(i2cdev, TMP105_REG_T_LOW), ==, 0x1234);
 104     i2c_set16(i2cdev, TMP105_REG_T_HIGH, 0x4231);
 105     g_assert_cmphex(i2c_get16(i2cdev, TMP105_REG_T_HIGH), ==, 0x4231);
 106 }
 107
 108 static void tmp105_register_nodes(void)
 109 {
 110     QOSGraphEdgeOptions opts = {
 111         .extra_device_opts = "id=" TMP105_TEST_ID ",address=0x49"
 112     };
 113     add_qi2c_address(&opts, &(QI2CAddress) { 0x49 });
 114
 115     qos_node_create_driver("tmp105", i2c_device_create);
 116     qos_node_consumes("tmp105", "i2c-bus", &opts);
 117
 118     qos_add_test("tx-rx", "tmp105", send_and_receive, NULL);
 119 }
 120 libqos_init(tmp105_register_nodes);