tests/ds1338-test.c

   1 /*
   2  * QTest testcase for the DS1338 RTC
   3  *
   4  * Copyright (c) 2013 Jean-Christophe Dubois
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License as published by the
   8  *  Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful, but WITHOUT
  12  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  *  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  14  *  for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "libqtest.h"
  22 #include "libqos/i2c.h"
  23
  24 #define IMX25_I2C_0_BASE 0x43F80000
  25
  26 #define DS1338_ADDR 0x68
  27
  28 static I2CAdapter *i2c;
  29 static uint8_t addr;
  30
  31 static inline uint8_t bcd2bin(uint8_t x)
  32 {
  33     return ((x) & 0x0f) + ((x) >> 4) * 10;
  34 }
  35
  36 static void send_and_receive(void)
  37 {
  38     uint8_t cmd[1];
  39     uint8_t resp[7];
  40     time_t now = time(NULL);
  41     struct tm *tm_ptr = gmtime(&now);
  42
  43     /* reset the index in the RTC memory */
  44     cmd[0] = 0;
  45     i2c_send(i2c, addr, cmd, 1);
  46
  47     /* retrieve the date */
  48     i2c_recv(i2c, addr, resp, 7);
  49
  50     /* check retrieved time againt local time */
  51     g_assert_cmpuint(bcd2bin(resp[4]), == , tm_ptr->tm_mday);
  52     g_assert_cmpuint(bcd2bin(resp[5]), == , 1 + tm_ptr->tm_mon);
  53     g_assert_cmpuint(2000 + bcd2bin(resp[6]), == , 1900 + tm_ptr->tm_year);
  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("-display none -machine imx25-pdk");
  64     i2c = imx_i2c_create(s, IMX25_I2C_0_BASE);
  65     addr = DS1338_ADDR;
  66
  67     qtest_add_func("/ds1338/tx-rx", send_and_receive);
  68
  69     ret = g_test_run();
  70
  71     qtest_quit(s);
  72     g_free(i2c);
  73
  74     return ret;
  75 }