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Test: FPGA shield: Add a Watchdog-timing test 

Use the FPGA IOMetrics feature to verify the watchdog timeout accuracy.
pull/11433/head
Filip Jagodzinski 2019-09-03 12:23:07 +02:00
parent 079564b174
commit 7f501683bc
1 changed files with 238 additions and 0 deletions
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238
TESTS/mbed_hal_fpga_ci_test_shield/watchdog_timing/main.cpp Normal file
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/*
* Copyright (c) 2019 Arm Limited and affiliates.
* SPDX-License-Identifier: Apache-2.0
*
* Licensed 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.
*/
#if !DEVICE_WATCHDOG
#error [NOT_SUPPORTED] Watchdog not supported for this target
#elif !COMPONENT_FPGA_CI_TEST_SHIELD
#error [NOT_SUPPORTED] FPGA CI Test Shield is needed to run this test
#elif !defined(TARGET_FF_ARDUINO) && !defined(MBED_CONF_TARGET_DEFAULT_FORM_FACTOR)
#error [NOT_SUPPORTED] Test not supported for this form factor
#else
#include "utest/utest.h"
#include "unity/unity.h"
#include "greentea-client/test_env.h"
#include "mbed.h"
#include "MbedTester.h"
#include "test_utils.h"
#include "hal/watchdog_api.h"
#define MSG_VALUE_DUMMY "0"
#define CASE_DATA_INVALID 0xffffffffUL
#define CASE_DATA_PHASE2_OK 0xfffffffeUL
#define MSG_VALUE_LEN 24
#define MSG_KEY_LEN 24
#define MSG_KEY_DEVICE_READY "ready"
#define MSG_KEY_START_CASE "start_case"
#define MSG_KEY_DEVICE_RESET "dev_reset"
#define WATCHDOG_PULSE_PERIOD_US 1000
using utest::v1::Case;
using utest::v1::Specification;
using utest::v1::Harness;
struct testcase_data {
int index;
int start_index;
uint32_t received_data;
};
testcase_data current_case;
/**
* Get the first pin from the whitelist that is absent form the blacklist.
*
* @param whitelist List of pins to choose from
* @param blacklist List of pins which cannot be used
* @return The first pin from the whitelist absent from the blacklist.
*/
PinName get_pin_to_restrict(const PinList *whitelist, const PinList *blacklist)
{
for (uint32_t i = 0; i < whitelist->count; i++) {
if (!pinmap_list_has_pin(blacklist, whitelist->pins[i])) {
return whitelist->pins[i];
}
}
return NC;
}
/**
* Allocate a new PinList, copy the pin_list and add the pin at the end.
*
* @param pin_list List of pins to copy
* @param pin The pin to add at the end of the new PinList
* @return Pointer to the allocated PinList or NULL on error.
*/
PinList *alloc_extended_pinlist(const PinList *pin_list, PinName pin)
{
PinName *pins = (PinName *) calloc(pin_list->count + 1, sizeof(PinName));
if (pins == NULL) {
return NULL;
}
for (uint32_t i = 0; i < pin_list->count; i++) {
pins[i] = pin_list->pins[i];
}
pins[pin_list->count] = pin;
PinList *new_pinlist = (PinList *) calloc(1, sizeof(PinList));
if (new_pinlist == NULL) {
free(pins);
return NULL;
}
new_pinlist->count = pin_list->count + 1;
new_pinlist->pins = pins;
return new_pinlist;
}
/**
* Free a previously allocated PinList.
*
* @param pin_list List of pins to free.
*/
void free_pinlist(PinList *pin_list)
{
if (pin_list) {
if (pin_list->pins) {
free((PinName *) pin_list->pins);
}
free(pin_list);
}
}
bool send_reset_notification(testcase_data *tcdata, uint32_t delay_ms)
{
char msg_value[12];
int str_len = snprintf(msg_value, sizeof msg_value, "%02x,%08lx", tcdata->start_index + tcdata->index, delay_ms);
if (str_len != (sizeof msg_value) - 1) {
utest_printf("Failed to compose a value string to be sent to host.");
return false;
}
greentea_send_kv(MSG_KEY_DEVICE_RESET, msg_value);
return true;
}
template<uint32_t timeout_ms>
void fpga_test_watchdog_timeout_accuracy()
{
watchdog_features_t features = hal_watchdog_get_platform_features();
if (timeout_ms > features.max_timeout) {
TEST_IGNORE_MESSAGE("Requested timeout value not supported for this target -- ignoring test case.");
return;
}
PinName watchdog_pulse_pin = get_pin_to_restrict(DefaultFormFactor::pins(), DefaultFormFactor::restricted_pins());
TEST_ASSERT(watchdog_pulse_pin != NC);
PinList *blacklist = alloc_extended_pinlist(DefaultFormFactor::restricted_pins(), watchdog_pulse_pin);
TEST_ASSERT_NOT_NULL(blacklist);
MbedTester tester(DefaultFormFactor::pins(), blacklist);
// Phase 2. -- verify the test results.
// Verify the FPGA time measurement is within given range:
// 1. The watchdog should trigger at, or after the timeout value.
// 2. The watchdog should trigger before twice the timeout value.
if (current_case.received_data != CASE_DATA_INVALID) {
TEST_ASSERT_EQUAL(CASE_DATA_PHASE2_OK, current_case.received_data);
current_case.received_data = CASE_DATA_INVALID;
tester.io_metrics_stop();
uint32_t num_falling_edges = tester.io_metrics_falling_edges(MbedTester::LogicalPinIOMetrics0);
uint32_t actual_timeout_ms = 0;
if (num_falling_edges > 0) {
actual_timeout_ms = (num_falling_edges - 1) * WATCHDOG_PULSE_PERIOD_US / 1000;
}
utest_printf("The FPGA shield measured %lu ms timeout.", actual_timeout_ms);
TEST_ASSERT(actual_timeout_ms >= timeout_ms);
TEST_ASSERT(actual_timeout_ms < 2 * timeout_ms);
free_pinlist(blacklist);
return;
}
// Phase 1. -- run the test code.
tester.reset();
tester.pin_map_set(watchdog_pulse_pin, MbedTester::LogicalPinIOMetrics0);
gpio_t pulse_pin;
int pulse_pin_value = 1;
gpio_init_out_ex(&pulse_pin, watchdog_pulse_pin, pulse_pin_value);
// Init the watchdog and wait for a device reset.
watchdog_config_t config = { timeout_ms };
if (send_reset_notification(&current_case, 2 * timeout_ms) == false) {
TEST_ASSERT_MESSAGE(0, "Dev-host communication error.");
free_pinlist(blacklist);
return;
}
tester.io_metrics_start();
TEST_ASSERT_EQUAL(WATCHDOG_STATUS_OK, hal_watchdog_init(&config));
while (1) {
pulse_pin_value ^= 1;
gpio_write(&pulse_pin, pulse_pin_value);
wait_us(WATCHDOG_PULSE_PERIOD_US / 2);
}
}
utest::v1::status_t case_setup(const Case *const source, const size_t index_of_case)
{
current_case.index = index_of_case;
return utest::v1::greentea_case_setup_handler(source, index_of_case);
}
int testsuite_setup(const size_t number_of_cases)
{
GREENTEA_SETUP(90, "watchdog_reset");
utest::v1::status_t status = utest::v1::greentea_test_setup_handler(number_of_cases);
if (status != utest::v1::STATUS_CONTINUE) {
return status;
}
char key[MSG_KEY_LEN + 1] = { };
char value[MSG_VALUE_LEN + 1] = { };
greentea_send_kv(MSG_KEY_DEVICE_READY, MSG_VALUE_DUMMY);
greentea_parse_kv(key, value, MSG_KEY_LEN, MSG_VALUE_LEN);
if (strcmp(key, MSG_KEY_START_CASE) != 0) {
utest_printf("Invalid message key.\n");
return utest::v1::STATUS_ABORT;
}
int num_args = sscanf(value, "%02x,%08lx", &(current_case.start_index), &(current_case.received_data));
if (num_args == 0 || num_args == EOF) {
utest_printf("Invalid data received from host\n");
return utest::v1::STATUS_ABORT;
}
utest_printf("This test suite is composed of %i test cases. Starting at index %i.\n", number_of_cases,
current_case.start_index);
return current_case.start_index;
}
Case cases[] = {
Case("Timeout accuracy, 200 ms", case_setup, fpga_test_watchdog_timeout_accuracy<200UL>),
Case("Timeout accuracy, 500 ms", case_setup, fpga_test_watchdog_timeout_accuracy<500UL>),
Case("Timeout accuracy, 1000 ms", case_setup, fpga_test_watchdog_timeout_accuracy<1000UL>),
Case("Timeout accuracy, 3000 ms", case_setup, fpga_test_watchdog_timeout_accuracy<3000UL>),
};
Specification specification((utest::v1::test_setup_handler_t) testsuite_setup, cases);
int main()
{
// Harness will start with a test case index provided by host script.
return !Harness::run(specification);
}
#endif // !DEVICE_WATCHDOG