No PWM signal on Nucleo F103RB using TIM1 CH2 PA9

[GeorgeCGV]

Describe the bug

No PWM signal is observed in Zephyr using Nucleo F103RB board with enabled Timer 1 and CH2 on PA9.

To Reproduce

Create an overlay for the nucleo_f103rb board:

&timers1 {
    status = "okay";
    st,prescaler = <0>;
    pwm1: pwm {
        status = "okay";
        pinctrl-0 = <&tim1_ch1_pwm_pa8
                         &tim1_ch2_pwm_pa9
                         &tim1_ch3_pwm_pa10>;
        pinctrl-names = "default";
    }; 
};

Start PWM on channel 2 or all (doesn't matter) with pwm_pin_set_<...>.

Observe no signal on PA9.

Expected behavior

PWM signal on CH2 PA9 shall be generated as it happens in HAL generated project.

Impact

No CH2 PWM signal.

Environment:

• OS: Windows
• Toolchain arm-none-eabi-10.3-2021.07
• Commit SHA: 49d08c2

Notes:

Tested up to 3 channels: tim1_ch1_pwm_pa8, tim1_ch2_pwm_pa9, and tim1_ch3_pwm_pa10. Every tested channel works except the second one on PA9.

[FRASTM]

In the DTS of the nucleo_f103rb, there is

&usart1 {
	pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
	pinctrl-names = "default";
	current-speed = <115200>;
	status = "okay";
};

So that the pb could be a pin conflict on PA9 between usart1_tx_pa9 and tim1_ch2_pwm_pa9.
Could you try disabling the usart1 in the overlay

&usart1 {
	status = "disabled";
};

[GeorgeCGV]

@FRASTM, indeed, missed that... works, thank you 👍