Hi there
I'm trying to make the SPI work on nRF53 (My board is nRF7002 DK) refer the tutorial academy.nordicsemi.com/.../ but I had the issue about frequency of spi peripheral.
Specifically:
When I config the the max frequency of SPI equal to 125Khz, I can get the output signal on the logic analyzer
&spi1 {
compatible = "nordic,nrf-spim";
status = "okay";
pinctrl-0 = <&spi1_default>;
pinctrl-1 = <&spi1_sleep>;
pinctrl-names = "default", "sleep";
cs-gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;
max-frequency = <0x7a1200>;
gendev: gendev@0 {
compatible = "vnd,spi-device";
reg = <0>;
spi-max-frequency = <125000>; // <= THIS CHANGE
label = "GenDev";
};
};
But when I try to change the frequency of SPI to higher, such as 500Khz, 1MHz. Signal on logic analyzer becomes strange (Please refer below picture)
&spi1 {
compatible = "nordic,nrf-spim";
status = "okay";
pinctrl-0 = <&spi1_default>;
pinctrl-1 = <&spi1_sleep>;
pinctrl-names = "default", "sleep";
cs-gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;
max-frequency = <0x7a1200>;
gendev: gendev@0 {
compatible = "vnd,spi-device";
reg = <0>;
spi-max-frequency = <1000000>; // <= THIS CHANGE
label = "GenDev";
};
};
I also tried with SPI0-> SPI4 but still get the same issue
Below is the source code I used (I use nRF connect SDK 2.9.0)
Did I miss anything? Looking forward to your feedback.
Thank you