LXR qemu/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
  19static I2CAdapter *i2c;
  20static uint8_t addr;
  21
  22static 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
  55int 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}
  77