drivertest/adc : support cmocka_driver_adc

testing/drivertest/Makefile

@@ -75,6 +75,11 @@ MAINSRC  += drivertest_watchdog.c
 PROGNAME += cmocka_driver_watchdog
 endif
 
+ifneq ($(CONFIG_ADC),)
+MAINSRC  += drivertest_adc.c
+PROGNAME += cmocka_driver_adc
+endif
+
 ifneq ($(CONFIG_I2C)$(CONFIG_SPI),)
 ifneq ($(CONFIG_SENSORS_BMI160),)
 MAINSRC  += drivertest_i2c_spi.c

testing/drivertest/drivertest_adc.c

@@ -0,0 +1,233 @@
+/****************************************************************************
+ * apps/testing/drivertest/drivertest_adc.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <syslog.h>
+#include <sys/time.h>
+#include <stdlib.h>
+
+#include <cmocka.h>
+#include <nuttx/analog/adc.h>
+#include <nuttx/analog/ioctl.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define OPTARG_TO_VALUE(value, type, base)                   \
+    do {                                                     \
+        FAR char* ptr;                                       \
+        value = (type)strtoul(optarg, &ptr, base);           \
+        if (*ptr != '\0') {                                  \
+            printf("Parameter error: -%c %s\n", ch, optarg); \
+            adc_help(argv[0]);                               \
+        }                                                    \
+    } while (0)
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+struct adc_state_s
+{
+  char devpath[PATH_MAX]; /* device to adc device path */
+  int adc_diff;           /* adc value difference */
+  int duration;           /* duration of sampling adc in seconds */
+  bool soft_trigger;      /* soft trigger : true or false */
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void adc_help(FAR char *process_name)
+{
+  printf("Usage: %s [OPTIONS]\n", process_name);
+  printf("  -p adc device path , default : /dev/adc0\n");
+  printf("  -d sample adc changes over set-up value. default : 200\n");
+  printf("  -t duration of adc test [second] , default: 10s\n");
+  printf("  -m adc conversion method, 1 --  soft trigger, "
+        "0 -- interrupt , default: 1\n");
+  exit(-1);
+}
+
+/****************************************************************************
+ * Name: parse_commandline
+ ****************************************************************************/
+
+static void parse_commandline(FAR struct adc_state_s *adc_state, int argc,
+                              FAR char **argv)
+{
+  int ch;
+  int converted;
+
+  while ((ch = getopt(argc, argv, "p:d:m:t:h")) != ERROR)
+    {
+      switch (ch)
+        {
+        case 'p':
+            strlcpy(adc_state->devpath, optarg, sizeof(adc_state->devpath));
+            adc_state->devpath[sizeof(adc_state->devpath) - 1] = '\0';
+            break;
+        case 'd':
+            OPTARG_TO_VALUE(converted, int, 10);
+            if (converted < 0 || converted > 5000)
+              {
+                printf("sample adc value changes over: %d\n", converted);
+                adc_help(argv[0]);
+              }
+
+            adc_state->adc_diff = (uint8_t)converted;
+            break;
+        case 't':
+            OPTARG_TO_VALUE(converted, int, 10);
+            if (converted < 1 || converted > INT_MAX)
+              {
+                printf("Duty out of range: %d\n", converted);
+                adc_help(argv[0]);
+              }
+
+            adc_state->duration = (int)converted;
+            break;
+        case 'm':
+            OPTARG_TO_VALUE(converted, uint8_t, 10);
+            adc_state->soft_trigger = converted ? true : false;
+            break;
+        case '?':
+            printf("Unsupported option: %s\n", optarg);
+
+        case 'h':
+            adc_help(argv[0]);
+            break;
+        }
+    }
+}
+
+int32_t adc_read_one_sample(int fd, bool soft_trigger)
+{
+  struct adc_msg_s sample;
+  int ret;
+  int nbytes;
+
+  /* software trigger to start one ADC conversion */
+
+  if (soft_trigger)
+    {
+      ret = ioctl(fd, ANIOC_TRIGGER, 0);
+      assert_return_code(ret, OK);
+    }
+
+  /* Read one samples */
+
+  nbytes = read(fd, &sample, sizeof(struct adc_msg_s));
+
+  /* Handle unexpected return values */
+
+  assert_true(nbytes == sizeof(struct adc_msg_s));
+
+  return sample.am_data;
+}
+
+/****************************************************************************
+ * Name: test_case_adc
+ ****************************************************************************/
+
+static void test_case_adc(FAR void** state)
+{
+  int fd;
+  bool succ = false;
+  int32_t value1;
+  int32_t value2;
+  struct timeval tv1;
+  struct timeval tv2;
+  struct timeval res;
+  FAR struct adc_state_s *adc_state;
+  adc_state = (FAR struct adc_state_s *)*state;
+
+  /* Open the ADC device for reading */
+
+  fd = open(adc_state->devpath, O_RDONLY);
+  assert_true(fd > 0);
+
+  value1 = adc_read_one_sample(fd, adc_state->soft_trigger);
+
+  /* ADC sample value should be changed in duration [seconds] */
+
+  gettimeofday(&tv1, NULL);
+  while (true)
+    {
+      value2 = adc_read_one_sample(fd, adc_state->soft_trigger);
+      if (abs(value2 - value1) > adc_state->adc_diff)
+        {
+          succ = true;
+          break;
+        }
+
+      gettimeofday(&tv2, NULL);
+      timersub(&tv2, &tv1, &res);
+      if (res.tv_sec >= adc_state->duration)
+        {
+          printf("adc test timed out\n");
+          break;
+        }
+
+      usleep(adc_state->soft_trigger ? 1000000 : 200000);
+    }
+
+  close(fd);
+  assert_true(succ);
+}
+
+/****************************************************************************
+ * drivertest_adc_main
+ ****************************************************************************/
+
+int main(int argc, FAR char *argv[])
+{
+  /* Initialize the state data */
+
+  struct adc_state_s adc_state = {
+      .devpath = "/dev/adc0",
+      .adc_diff = 200,
+      .duration = 10,
+      .soft_trigger = true,
+  };
+
+  parse_commandline(&adc_state, argc, argv);
+
+  const struct CMUnitTest tests[] = {
+      cmocka_unit_test_prestate(test_case_adc, &adc_state),
+  };
+
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}