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nicla-sense: add PWM support #478

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b4aa376
nicla-sense: enabling PWM and add PWM description in DT
maidnl May 5, 2026
3eab933
variant: nicla_sense: add pinctrl-2 and fix missing deferred-init
dani-clo May 14, 2026
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2 changes: 1 addition & 1 deletion variants/arduino_nicla_sense_me_nrf52832/arduino_nicla_sense_me_nrf52832.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ CONFIG_BT_BUF_CMD_TX_COUNT=10
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=512

CONFIG_ADC=y
#CONFIG_PWM=y
CONFIG_PWM=y
CONFIG_COUNTER=y

CONFIG_LLEXT_STORAGE_WRITABLE=n
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131 changes: 131 additions & 0 deletions variants/arduino_nicla_sense_me_nrf52832/arduino_nicla_sense_me_nrf52832.overlay
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,110 @@
prescaler = <1>; // Optional: sets the RTC tick to ~30.5 µs
};

&adc {
zephyr,deferred-init;
};

&pinctrl {
empty_default: empty_default {
group1 {
psels = <>;
};
};

pwm1_default: pwm1_default {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 10)>,
<NRF_PSEL(PWM_OUT1, 0, 9)>,
<NRF_PSEL(PWM_OUT2, 0, 20)>,
<NRF_PSEL(PWM_OUT3, 0, 23)>;
nordic,invert;
};
};

pwm1_sleep: pwm1_sleep {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 10)>,
<NRF_PSEL(PWM_OUT1, 0, 9)>,
<NRF_PSEL(PWM_OUT2, 0, 20)>,
<NRF_PSEL(PWM_OUT3, 0, 23)>;
low-power-enable;
};
};

pwm2_default: pwm2_default {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 22)>,
<NRF_PSEL(PWM_OUT1, 0, 24)>,
<NRF_PSEL(PWM_OUT2, 0, 29)>,
<NRF_PSEL(PWM_OUT3, 0, 28)>;
nordic,invert;
};
};

pwm2_sleep: pwm2_sleep {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 22)>,
<NRF_PSEL(PWM_OUT1, 0, 24)>,
<NRF_PSEL(PWM_OUT2, 0, 29)>,
<NRF_PSEL(PWM_OUT3, 0, 28)>;
low-power-enable;
};
};

pwm3_default: pwm3_default {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 27)>,
<NRF_PSEL(PWM_OUT1, 0, 11)>,
<NRF_PSEL(PWM_OUT2, 0, 2)>,
<NRF_PSEL(PWM_OUT3, 0, 30)>;
nordic,invert;
};
};

pwm3_sleep: pwm3_sleep {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 27)>, /* keep original config */
<NRF_PSEL(PWM_OUT1, 0, 11)>,
<NRF_PSEL(PWM_OUT2, 0, 2)>,
<NRF_PSEL(PWM_OUT3, 0, 30)>;
low-power-enable;
};
};
};

&pwm0 {
status = "okay";
zephyr,deferred-init;
pinctrl-0 = <&empty_default>;
pinctrl-1 = <&pwm1_sleep>;
pinctrl-2 = <&pwm1_default>;
pinctrl-names = "default", "sleep", "arduino";
};

&pwm1 {
status = "okay";
zephyr,deferred-init;
pinctrl-0 = <&empty_default>;
pinctrl-1 = <&pwm2_sleep>;
pinctrl-2 = <&pwm2_default>;
pinctrl-names = "default", "sleep", "arduino";
};

&pwm2 {
status = "okay";
zephyr,deferred-init;
pinctrl-0 = <&empty_default>;
pinctrl-1 = <&pwm3_sleep>;
pinctrl-2 = <&pwm3_default>;
pinctrl-names = "default", "sleep", "arduino";
};

&i2c1 {
status = "okay";
zephyr,deferred-init;
};

/ {
zephyr,user {
digital-pin-gpios = <&gpio0 10 0>, // 0: GPIO3
Expand Down Expand Up @@ -58,6 +162,33 @@
io-channels = <&adc 0>,
<&adc 6>;

pwm-pin-gpios = <&gpio0 10 0>,
<&gpio0 9 0>,
<&gpio0 20 0>,
<&gpio0 23 0>,
<&gpio0 22 0>,
<&gpio0 24 0>,
<&gpio0 29 0>,
<&gpio0 28 0>,
<&gpio0 27 0>,
<&gpio0 11 0>,
<&gpio0 2 0>,
<&gpio0 30 0>;


pwms = <&pwm0 0 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm0 1 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm0 2 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm0 3 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm1 0 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm1 1 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm1 2 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm1 3 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm2 0 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm2 1 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm2 2 PWM_HZ(500) PWM_POLARITY_NORMAL>,
<&pwm2 3 PWM_HZ(500) PWM_POLARITY_NORMAL>;

serials = <&uart0>;
i2cs = <&i2c1>;
// spis = <&spi0>; // conflicts with uart0 (same peripheral)
Expand Down
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