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* Copyright (c) 2019 Piotr Mienkowski
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <limits.h>
#include <zephyr/sys/util.h>
#include "test_gpio_api.h"
#define TEST_GPIO_MAX_SINGLE_ENDED_RISE_FALL_TIME_MS 100
#define TEST_POINT(n) (n)
static void pin_get_raw_and_verify(const struct device *port,
unsigned int pin,
int val_expected, int idx)
{
int val_actual;
val_actual = gpio_pin_get_raw(port, pin);
zassert_true(val_actual >= 0,
"Test point %d: failed to get pin value", idx);
zassert_equal(val_expected, val_actual,
"Test point %d: invalid pin get value", idx);
}
static void pin_set_raw_and_verify(const struct device *port,
unsigned int pin,
int val, int idx)
{
zassert_equal(gpio_pin_set_raw(port, pin, val), 0,
"Test point %d: failed to set pin value", idx);
k_busy_wait(TEST_GPIO_MAX_RISE_FALL_TIME_US);
}
/** @brief Verify gpio_pin_configure function in push pull mode.
*
* - Configure pin in in/out mode, verify that gpio_pin_set_raw /
* gpio_pin_get_raw operations change pin state.
* - Verify that GPIO_OUTPUT_HIGH flag is initializing the pin to high.
* - Verify that GPIO_OUTPUT_LOW flag is initializing the pin to low.
* - Verify that configuring the pin as an output without initializing it
* to high or low does not change pin state.
* - Verify that it is not possible to change value of a pin via
* gpio_pin_set_raw function if pin is configured as an input.
*/
void test_gpio_pin_configure_push_pull(void)
{
const struct device *port;
int ret;
port = device_get_binding(TEST_DEV);
zassert_not_null(port, "device " TEST_DEV " not found");
TC_PRINT("Running test on port=%s, pin=%d\n", TEST_DEV, TEST_PIN);
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT);
zassert_equal(ret, 0, "Failed to configure the pin as an output");
pin_set_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(1));
pin_set_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(1));
/* Configure pin in in/out mode, verify that gpio_pin_set_raw /
* gpio_pin_get_raw operations change pin state.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT | GPIO_INPUT);
if (ret == -ENOTSUP) {
TC_PRINT("Simultaneous pin in/out mode is not supported.\n");
ztest_test_skip();
return;
}
zassert_equal(ret, 0, "Failed to configure the pin in in/out mode");
pin_set_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(2));
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(2));
pin_set_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(3));
pin_get_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(3));
pin_set_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(4));
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(4));
/* Verify that GPIO_OUTPUT_HIGH flag is initializing the pin to high. */
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT_HIGH | GPIO_INPUT);
zassert_equal(ret, 0,
"Failed to configure the pin in in/out mode and "
"initialize it to high");
pin_get_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(5));
/* Verify that configuring the pin as an output without initializing it
* to high or low does not change pin state.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT | GPIO_INPUT);
zassert_equal(ret, 0, "Failed to configure the pin in in/out mode");
pin_get_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(6));
/* Verify that GPIO_OUTPUT_LOW flag is initializing the pin to low. */
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT_LOW | GPIO_INPUT);
zassert_equal(ret, 0,
"Failed to configure the pin in in/out mode and "
"initialize it to low");
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(7));
/* Verify that configuring the pin as an output without initializing it
* to high or low does not change pin state.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT | GPIO_INPUT);
zassert_equal(ret, 0, "Failed to configure the pin in in/out mode");
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(8));
/* Verify that it is not possible to change value of a pin via
* gpio_pin_set_raw function if pin is configured as an input.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_INPUT);
zassert_equal(ret, 0, "Failed to configure the pin as an input");
k_busy_wait(TEST_GPIO_MAX_RISE_FALL_TIME_US);
int pin_in_val;
pin_in_val = gpio_pin_get_raw(port, TEST_PIN);
zassert_true(pin_in_val >= 0,
"Test point %d: failed to get pin value", TEST_POINT(9));
pin_set_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(10));
pin_get_raw_and_verify(port, TEST_PIN, pin_in_val, TEST_POINT(10));
pin_set_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(11));
pin_get_raw_and_verify(port, TEST_PIN, pin_in_val, TEST_POINT(11));
}
/** @brief Verify gpio_pin_configure function in single ended mode.
*
* @note This test verifies single ended mode only partially. It should not be
* used as a sign off test.
*
* - Verify that pin configured in Open Drain mode and initialized
* to high results in pin high value if the same pin configured
* as input is high. Drivers that do not support Open Drain flag
* return ENOTSUP.
* - Setting pin configured in Open Drain mode to low results in
* pin low value if the same pin configured as input is high.
* - Verify that pin configured in Open Source mode and
* initialized to low results in pin high value if the same pin
* configured as input is high. Drivers that do not support Open
* Source flag return ENOTSUP.
* - Verify that pin configured in Open Source mode and
* initialized to low results in pin low value if the same pin
* configured as input is low. Drivers that do not support Open
* Source flag return ENOTSUP.
* - Setting pin configured in Open Source mode to high results in
* pin high value if the same pin configured as input is low.
* - Verify that pin configured in Open Drain mode and
* initialized to high results in pin low value if the same pin
* configured as input is low. Drivers that do not support Open
* Drain flag return ENOTSUP.
*/
void test_gpio_pin_configure_single_ended(void)
{
const struct device *port;
int pin_in_val;
int pin_val;
unsigned int cfg_flag;
int ret;
port = device_get_binding(TEST_DEV);
zassert_not_null(port, "device " TEST_DEV " not found");
TC_PRINT("Running test on port=%s, pin=%d\n", TEST_DEV, TEST_PIN);
/* If the LED is connected directly between the MCU pin and power or
* ground we can test only one of the Open Drain / Open Source modes.
* Guess pin level when the LED is off. If the pin is not connected
* directly to LED but instead the signal is routed to an input of
* another chip we could test both modes. However, there is no way to
* find it out so only one mode is tested.
*/
if ((TEST_PIN_DTS_FLAGS & GPIO_ACTIVE_LOW) != 0) {
cfg_flag = GPIO_PULL_UP;
pin_val = 1;
} else {
cfg_flag = GPIO_PULL_DOWN;
pin_val = 0;
}
/* Configure pin as an input with pull up/down and check input level. */
ret = gpio_pin_configure(port, TEST_PIN, GPIO_INPUT | cfg_flag);
if (ret == -ENOTSUP) {
TC_PRINT("Pull Up / Pull Down pin bias is not supported\n");
ztest_test_skip();
return;
}
zassert_equal(ret, 0, "Failed to configure pin as an input");
k_sleep(K_MSEC(TEST_GPIO_MAX_SINGLE_ENDED_RISE_FALL_TIME_MS));
pin_in_val = gpio_pin_get_raw(port, TEST_PIN);
zassert_true(pin_in_val >= 0, "Failed to get pin value");
if (pin_val != pin_in_val) {
TC_PRINT("Board configuration does not allow to run the test\n");
ztest_test_skip();
return;
}
if (pin_val == 1) {
TC_PRINT("When configured as input test pin value is high\n");
/* Verify that pin configured in Open Drain mode and initialized
* to high results in pin high value if the same pin configured
* as input is high. Drivers that do not support Open Drain flag
* return -ENOTSUP.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT_HIGH |
GPIO_OPEN_DRAIN | GPIO_INPUT | GPIO_PULL_UP);
if (ret == -ENOTSUP) {
TC_PRINT("Open Drain configuration or Pull Up pin "
"bias is not supported\n");
ztest_test_skip();
return;
}
zassert_equal(ret, 0,
"Failed to configure the pin in Open Drain mode");
pin_get_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(1));
/* Setting pin configured in Open Drain mode to low results in
* pin low value if the same pin configured as input is high.
*/
pin_set_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(2));
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(2));
/* Verify that pin configured in Open Source mode and
* initialized to low results in pin high value if the same pin
* configured as input is high. Drivers that do not support Open
* Source flag return -ENOTSUP.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT_LOW |
GPIO_OPEN_SOURCE | GPIO_INPUT | GPIO_PULL_UP);
if (ret == -ENOTSUP) {
TC_PRINT("Open Source configuration or Pull Up pin "
"bias is not supported\n");
return;
}
zassert_equal(ret, 0,
"Failed to configure the pin in Open Source mode");
k_sleep(K_MSEC(TEST_GPIO_MAX_SINGLE_ENDED_RISE_FALL_TIME_MS));
pin_get_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(3));
pin_set_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(4));
pin_get_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(4));
} else {
TC_PRINT("When configured as input test pin value is low\n");
/* Verify that pin configured in Open Source mode and
* initialized to low results in pin low value if the same pin
* configured as input is low. Drivers that do not support Open
* Source flag return -ENOTSUP.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT_LOW |
GPIO_OPEN_SOURCE | GPIO_INPUT | GPIO_PULL_DOWN);
if (ret == -ENOTSUP) {
TC_PRINT("Open Source configuration or Pull Down pin "
"bias is not supported\n");
ztest_test_skip();
return;
}
zassert_equal(ret, 0,
"Failed to configure the pin in Open Source mode");
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(5));
/* Setting pin configured in Open Source mode to high results in
* pin high value if the same pin configured as input is low.
*/
pin_set_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(6));
pin_get_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(6));
/* Verify that pin configured in Open Drain mode and
* initialized to high results in pin low value if the same pin
* configured as input is low. Drivers that do not support Open
* Drain flag return -ENOTSUP.
*/
ret = gpio_pin_configure(port, TEST_PIN, GPIO_OUTPUT_HIGH |
GPIO_OPEN_DRAIN | GPIO_INPUT | GPIO_PULL_DOWN);
if (ret == -ENOTSUP) {
TC_PRINT("Open Drain configuration or Pull Down pin "
"bias is not supported\n");
return;
}
zassert_equal(ret, 0,
"Failed to configure the pin in Open Drain mode");
k_sleep(K_MSEC(TEST_GPIO_MAX_SINGLE_ENDED_RISE_FALL_TIME_MS));
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(7));
pin_set_raw_and_verify(port, TEST_PIN, 1, TEST_POINT(8));
pin_get_raw_and_verify(port, TEST_PIN, 0, TEST_POINT(8));
}
}
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