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 uint16_t tmp105_get16(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
  24 {
  25     uint8_t resp[2];
  26     i2c_send(i2c, addr, &reg, 1);
  27     i2c_recv(i2c, addr, resp, 2);
  28     return (resp[0] << 8) | resp[1];
  29 }
  30
  31 static void tmp105_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
  32                         uint8_t value)
  33 {
  34     uint8_t cmd[2];
  35     uint8_t resp[1];
  36
  37     cmd[0] = reg;
  38     cmd[1] = value;
  39     i2c_send(i2c, addr, cmd, 2);
  40     i2c_recv(i2c, addr, resp, 1);
  41     g_assert_cmphex(resp[0], ==, cmd[1]);
  42 }
  43
  44 static void tmp105_set16(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
  45                          uint16_t value)
  46 {
  47     uint8_t cmd[3];
  48     uint8_t resp[2];
  49
  50     cmd[0] = reg;
  51     cmd[1] = value >> 8;
  52     cmd[2] = value & 255;
  53     i2c_send(i2c, addr, cmd, 3);
  54     i2c_recv(i2c, addr, resp, 2);
  55     g_assert_cmphex(resp[0], ==, cmd[1]);
  56     g_assert_cmphex(resp[1], ==, cmd[2]);
  57 }
  58
  59
  60 static void send_and_receive(void)
  61 {
  62     uint16_t value;
  63
  64     value = tmp105_get16(i2c, addr, TMP105_REG_TEMPERATURE);
  65     g_assert_cmpuint(value, ==, 0);
  66
  67     /* reset */
  68     tmp105_set8(i2c, addr, TMP105_REG_CONFIG, 0);
  69
  70     tmp105_set16(i2c, addr, TMP105_REG_T_LOW, 0x1234);
  71     tmp105_set16(i2c, addr, TMP105_REG_T_HIGH, 0x4231);
  72 }
  73
  74 int main(int argc, char **argv)
  75 {
  76     QTestState *s = NULL;
  77     int ret;
  78
  79     g_test_init(&argc, &argv, NULL);
  80
  81     s = qtest_start("-machine n800");
  82     i2c = omap_i2c_create(OMAP2_I2C_1_BASE);
  83     addr = N8X0_ADDR;
  84
  85     qtest_add_func("/tmp105/tx-rx", send_and_receive);
  86
  87     ret = g_test_run();
  88
  89     if (s) {
  90         qtest_quit(s);
  91     }
  92     g_free(i2c);
  93
  94     return ret;
  95 }