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[nrf fromlist] tests: drivers: pwm_gpio_loopback: Test improvement #3097

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Merged
merged 2 commits into from
Jul 30, 2025
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[nrf fromlist] tests: drivers: pwm_gpio_loopback: Test improvement #3097

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0b3200b
[nrf fromlist] tests: drivers: pwm_gpio_loopback: Test improvement
nordic-pikr Jul 28, 2025
4a5d909
[nrf fromlist] tests: drivers: pwm_gpio_loopback: Add more channels
nordic-pikr Jul 28, 2025
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32 changes: 21 additions & 11 deletions tests/drivers/pwm/pwm_gpio_loopback/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
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Original file line number Diff line number Diff line change
Expand Up @@ -4,45 +4,55 @@
*
* Test requires wire connection between:
* - PWM130 OUT[0] at P0.00 <-> GPIO input at P0.01
* - PWM130 OUT[1] at P0.02 <-> GPIO input at P0.04
* - PWM130 OUT[2] at P0.03 <-> GPIO input at P0.05
* - PWM130 OUT[3] at P0.06 <-> GPIO input at P0.07
* - PWM120 OUT[0] at P7.00 <-> GPIO input at P1.09
* - PWM120 OUT[1] at P7.01 <-> GPIO input at P1.05
*/

/ {
zephyr,user {
pwms = <&pwm130 0 160000 PWM_POLARITY_NORMAL>,
<&pwm120 0 80000 PWM_POLARITY_NORMAL>,
<&pwm120 1 80000 PWM_POLARITY_NORMAL>;
<&pwm130 1 160000 PWM_POLARITY_NORMAL>,
<&pwm130 2 160000 PWM_POLARITY_NORMAL>,
<&pwm130 3 160000 PWM_POLARITY_NORMAL>,
<&pwm120 0 80000 PWM_POLARITY_NORMAL>;
gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>,
<&gpio1 9 GPIO_ACTIVE_HIGH>,
<&gpio1 5 GPIO_ACTIVE_HIGH>;
<&gpio0 4 GPIO_ACTIVE_HIGH>,
<&gpio0 5 GPIO_ACTIVE_HIGH>,
<&gpio0 7 GPIO_ACTIVE_HIGH>,
<&gpio1 9 GPIO_ACTIVE_HIGH>;
};
};

&pinctrl {
pwm130_default: pwm130_default {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 0)>;
psels = <NRF_PSEL(PWM_OUT0, 0, 0)>,
<NRF_PSEL(PWM_OUT1, 0, 2)>,
<NRF_PSEL(PWM_OUT2, 0, 3)>,
<NRF_PSEL(PWM_OUT3, 0, 6)>;
};
};

pwm130_sleep: pwm130_sleep {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 0)>;
psels = <NRF_PSEL(PWM_OUT0, 0, 0)>,
<NRF_PSEL(PWM_OUT1, 0, 2)>,
<NRF_PSEL(PWM_OUT2, 0, 3)>,
<NRF_PSEL(PWM_OUT3, 0, 6)>;
low-power-enable;
};
};

pwm120_default: pwm120_default {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 7, 0)>,
<NRF_PSEL(PWM_OUT1, 7, 1)>;
psels = <NRF_PSEL(PWM_OUT0, 7, 0)>;
};
};
pwm120_sleep: pwm120_sleep {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 7, 0)>,
<NRF_PSEL(PWM_OUT1, 7, 1)>;
psels = <NRF_PSEL(PWM_OUT0, 7, 0)>;
low-power-enable;
};
};
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30 changes: 27 additions & 3 deletions tests/drivers/pwm/pwm_gpio_loopback/boards/nrf54l15dk_nrf54l15_cpuapp.overlay
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Original file line number Diff line number Diff line change
Expand Up @@ -3,12 +3,36 @@
* SPDX-License-Identifier: Apache-2.0
*
* Test requires jumper between:
* - PWM20 OUT[0] at P1.10 <-> GPIO input at P1.11
* - PWM20 OUT[0] at P1.08 <-> GPIO input at P1.09
* - PWM20 OUT[1] at P1.10 <-> GPIO input at P1.11
* - PWM20 OUT[2] at P1.12 <-> GPIO input at P1.13
*/

/ {
zephyr,user {
pwms = <&pwm20 0 160000 PWM_POLARITY_NORMAL>;
gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
pwms = <&pwm20 0 160000 PWM_POLARITY_NORMAL>,
<&pwm20 1 160000 PWM_POLARITY_NORMAL>,
<&pwm20 2 160000 PWM_POLARITY_NORMAL>;
gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>,
<&gpio1 11 GPIO_ACTIVE_HIGH>,
<&gpio1 13 GPIO_ACTIVE_HIGH>;
};
};

&pinctrl {
pwm20_default: pwm20_default {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 1, 8)>,
<NRF_PSEL(PWM_OUT1, 1, 10)>,
<NRF_PSEL(PWM_OUT2, 1, 12)>;
};
};

pwm20_sleep: pwm20_sleep {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 1, 8)>,
<NRF_PSEL(PWM_OUT1, 1, 10)>,
<NRF_PSEL(PWM_OUT2, 1, 12)>;
};
};
};
23 changes: 16 additions & 7 deletions tests/drivers/pwm/pwm_gpio_loopback/src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -234,16 +234,25 @@ ZTEST(pwm_gpio_loopback, test_pwm)

ZTEST(pwm_gpio_loopback, test_pwm_cross)
{
uint8_t duty[TEST_PWM_COUNT];
const int duty_step = 25;
const int duty_variations = 5;

/* Initial sweep with increasing duty cycles */
for (int i = 0; i < TEST_PWM_COUNT; i++) {
/* Test case: [Duty: 40%] */
test_run(&pwms_dt[i], &gpios_dt[i], 40, true);
duty[i] = (i % duty_variations) * duty_step;
test_run(&pwms_dt[i], &gpios_dt[i], duty[i], true);
}

/* Set all channels and check if they retain the original
* configuration without calling pwm_set again
*/
for (int i = 0; i < TEST_PWM_COUNT; i++) {
test_run(&pwms_dt[i], &gpios_dt[i], 40, false);
/* Repeat test with persistent config checks and rotated duty cycles */
for (int j = 1; j < duty_variations; j++) {
for (int i = 0; i < TEST_PWM_COUNT; i++) {
test_run(&pwms_dt[i], &gpios_dt[i], duty[i], false);
}
for (int i = 0; i < TEST_PWM_COUNT; i++) {
duty[i] = ((j + i) % duty_variations) * duty_step;
test_run(&pwms_dt[i], &gpios_dt[i], duty[i], true);
}
}
}

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