NUCLEO-H563ZI SPI communication with L6472

[Xavier-Diasys]

[Hello,]

I am working on an NUCLEO-H563ZI with Zephyr and using a motor driver (L6472) over SPI. I noticed that the MOSI line (green in the photo) goes high even when no clock signal is generated. I am wondering if this could affect the response to the 0x21 frame.

In the component's datasheet, it is mentioned that there is no response from the driver before sending the command frame. How can I ensure that the MOSI line remains low when there is no clock signal?

This is my device tree and the functions I use to write and read register.

`&spi4 {
pinctrl-0 = <&spi4_sck_pe12 &spi4_miso_pe13 &spi4_mosi_pe14>;
pinctrl-names = "default";
cs-gpios = <&gpiod 11 (GPIO_ACTIVE_LOW)>;
status = "okay";
};

&spi4_sck_pe12{
slew-rate = "very-high-speed";
bias-pull-up;
};

&spi4_miso_pe13{
slew-rate = "very-high-speed";
bias-pull-down;
};

&spi4_mosi_pe14{
slew-rate = "very-high-speed";
bias-pull-down;
};`