SPI node in overlay file

RE: SPI node in overlay file

mark.zhang — Thu, 11 Apr 2024 15:59:30 GMT

I made minor change in overlay file as:

spi_3911b: &spi1 {

compatible = "nordic,nrf-spim";

status = "okay";

cs-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>;

pinctrl-0 = <&spi_master_default>;

pinctrl-1 = <&spi_master_sleep>;

pinctrl-names = "default", "sleep";

reg_spi_3911b: spi-dev-a@0 {

compatible = "spi-device";

status = "okay";

reg = <0>;

spi-max-frequency = <4000000>;

lable = "SPI_3911B";

};

RE: SPI node in overlay file

Jared — Thu, 11 Apr 2024 07:33:43 GMT

What was the solution?

regards

Jared

RE: SPI node in overlay file

mark.zhang — Wed, 10 Apr 2024 20:11:18 GMT

Hi,

It is solved.

Thanks,

RE: SPI node in overlay file

mark.zhang — Wed, 10 Apr 2024 16:06:04 GMT

HI, Jared:

I used Logic analyzer to capture the SPI communication;

This is company project, I can not share it on public.

RE: SPI node in overlay file

Jared — Wed, 10 Apr 2024 10:54:49 GMT

Hi,

That looks correct, how do you verify the SPI clock frequency?

Can you share your build folder as well?

regards

Jared

RE: SPI node in overlay file

mark.zhang — Tue, 09 Apr 2024 23:10:18 GMT

After I change spi_3911b definition in overlay file to below:

spi_3911b: &spi1 {

compatible = "nordic,nrf-spi";

status = "okay";

cs-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>;

pinctrl-0 = <&spi_master_default>;

pinctrl-1 = <&spi_master_sleep>;

pinctrl-names = "default", "sleep";

reg_spi_3911b: spi_3911b@0 {

compatible = "spi-device";

reg = <0>;

spi-max-frequency = <4000000>;

};

compiling is file now, but, I could not change SPI clock frequency in SPI config, it is always 8M HZ, how to reduce it 4M ?