| /* |
| * Copyright (c) 2016 Intel Corporation. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /* |
| * @addtogroup test_pwm_basic_operations |
| * @{ |
| * @defgroup t_pwm_basic_operations test_pwm_sample |
| * @brief TestPurpose: verify PWM can work well when configure |
| * through usec, nsec, or cycle. |
| * @details |
| * - Test Steps |
| * -# Bind PWM_0 port 0. |
| * -# Set PWM period and pulse using pwm_pin_set_cycles(), |
| * pwm_pin_set_usec(), or pwm_pin_set_nsec(). |
| * -# Use multimeter or other instruments to measure the output |
| * from PWM_OUT_0. |
| * - Expected Results |
| * -# The output of PWM_OUT_0 will differ according to the value |
| * of period and pulse. |
| * Always on -> Period : Pulse (1 : 1) -> 3.3V |
| * Half on -> Period : Pulse (2 : 1) -> 1.65V |
| * Always off -> Period : Pulse (1 : 0) -> 0V |
| * @} |
| */ |
| |
| #include <device.h> |
| #include <inttypes.h> |
| #include <drivers/pwm.h> |
| #include <zephyr.h> |
| #include <ztest.h> |
| |
| #if defined(DT_ALIAS_PWM_0_LABEL) |
| #define PWM_DEV_NAME DT_ALIAS_PWM_0_LABEL |
| #elif defined(DT_ALIAS_PWM_1_LABEL) |
| #define PWM_DEV_NAME DT_ALIAS_PWM_1_LABEL |
| #elif defined(DT_ALIAS_PWM_2_LABEL) |
| #define PWM_DEV_NAME DT_ALIAS_PWM_2_LABEL |
| #elif defined(DT_ALIAS_PWM_3_LABEL) |
| #define PWM_DEV_NAME DT_ALIAS_PWM_3_LABEL |
| #else |
| #error "Define a PWM device" |
| #endif |
| |
| #ifdef CONFIG_BOARD_COLIBRI_IMX7D_M4 |
| #define DEFAULT_PERIOD_CYCLE 1024 |
| #define DEFAULT_PULSE_CYCLE 512 |
| #define DEFAULT_PERIOD_USEC 2000 |
| #define DEFAULT_PULSE_USEC 500 |
| #define DEFAULT_PERIOD_NSEC 2000000 |
| #define DEFAULT_PULSE_NSEC 500000 |
| #else |
| #define DEFAULT_PERIOD_CYCLE 64000 |
| #define DEFAULT_PULSE_CYCLE 32000 |
| #define DEFAULT_PERIOD_USEC 2000 |
| #define DEFAULT_PULSE_USEC 1000 |
| #define DEFAULT_PERIOD_NSEC 2000000 |
| #define DEFAULT_PULSE_NSEC 1000000 |
| #endif |
| |
| #if defined CONFIG_BOARD_SAM_E70_XPLAINED |
| #define DEFAULT_PWM_PORT 2 /* PWM on EXT2 connector, pin 8 */ |
| #else |
| #define DEFAULT_PWM_PORT 0 |
| #endif |
| |
| #define UNIT_CYCLES 0 |
| #define UNIT_USECS 1 |
| #define UNIT_NSECS 2 |
| |
| static int test_task(u32_t port, u32_t period, u32_t pulse, u8_t unit) |
| { |
| TC_PRINT("[PWM]: %" PRIu8 ", [period]: %" PRIu32 ", [pulse]: %" PRIu32 "\n", |
| port, period, pulse); |
| |
| struct device *pwm_dev = device_get_binding(PWM_DEV_NAME); |
| |
| if (!pwm_dev) { |
| TC_PRINT("Cannot get PWM device\n"); |
| return TC_FAIL; |
| } |
| |
| if (unit == UNIT_CYCLES) { |
| /* Verify pwm_pin_set_cycles() */ |
| if (pwm_pin_set_cycles(pwm_dev, port, period, pulse)) { |
| TC_PRINT("Fail to set the period and pulse width\n"); |
| return TC_FAIL; |
| } |
| } else if (unit == UNIT_USECS) { |
| /* Verify pwm_pin_set_usec() */ |
| if (pwm_pin_set_usec(pwm_dev, port, period, pulse)) { |
| TC_PRINT("Fail to set the period and pulse width\n"); |
| return TC_FAIL; |
| } |
| } else { /* unit == UNIT_NSECS */ |
| /* Verify pwm_pin_set_nsec() */ |
| if (pwm_pin_set_nsec(pwm_dev, port, period, pulse)) { |
| TC_PRINT("Fail to set the period and pulse width\n"); |
| return TC_FAIL; |
| } |
| } |
| |
| return TC_PASS; |
| } |
| |
| void test_pwm_usec(void) |
| { |
| /* Period : Pulse (2000 : 1000), unit (usec). Voltage : 1.65V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_USEC, |
| DEFAULT_PULSE_USEC, UNIT_USECS) == TC_PASS, NULL); |
| k_sleep(1000); |
| |
| /* Period : Pulse (2000 : 2000), unit (usec). Voltage : 3.3V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_USEC, |
| DEFAULT_PERIOD_USEC, UNIT_USECS) == TC_PASS, NULL); |
| k_sleep(1000); |
| |
| /* Period : Pulse (2000 : 0), unit (usec). Voltage : 0V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_USEC, |
| 0, UNIT_USECS) == TC_PASS, NULL); |
| k_sleep(1000); |
| } |
| |
| void test_pwm_nsec(void) |
| { |
| /* Period : Pulse (2000000 : 1000000), unit (nsec). Voltage : 1.65V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_NSEC, |
| DEFAULT_PULSE_NSEC, UNIT_NSECS) == TC_PASS, NULL); |
| k_sleep(1000); |
| |
| /* Period : Pulse (2000000 : 2000000), unit (nsec). Voltage : 3.3V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_NSEC, |
| DEFAULT_PERIOD_NSEC, UNIT_NSECS) == TC_PASS, NULL); |
| k_sleep(1000); |
| |
| /* Period : Pulse (2000000 : 0), unit (nsec). Voltage : 0V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_NSEC, |
| 0, UNIT_NSECS) == TC_PASS, NULL); |
| k_sleep(1000); |
| } |
| |
| void test_pwm_cycle(void) |
| { |
| /* Period : Pulse (64000 : 32000), unit (cycle). Voltage : 1.65V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_CYCLE, |
| DEFAULT_PULSE_CYCLE, UNIT_CYCLES) == TC_PASS, NULL); |
| k_sleep(1000); |
| |
| /* Period : Pulse (64000 : 64000), unit (cycle). Voltage : 3.3V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_CYCLE, |
| DEFAULT_PERIOD_CYCLE, UNIT_CYCLES) == TC_PASS, NULL); |
| k_sleep(1000); |
| |
| /* Period : Pulse (64000 : 0), unit (cycle). Voltage : 0V */ |
| zassert_true(test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_CYCLE, |
| 0, UNIT_CYCLES) == TC_PASS, NULL); |
| } |