NRF52840 Lan8651

[karenn]

Hello, I'm trying to use the Lan865x (two-wire eth click) chip with the nrf52840dk board, using zephyr 3.7. I'm getting always this error while trying a net sample code : <err> oa_tc6: Header transmission error! <err> eth_lan865x: SPI communication not working, -19 .

here my device DT :

&spi3 { compatible = "nordic,nrf-spim"; status = "okay"; // Enable the SPI interface cs-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>; pinctrl-0 = <&spi3_default>; pinctrl-1 = <&spi3_sleep>; pinctrl-names = "default", "sleep"; lan865x: lan865x@0 { status = "okay"; compatible = "microchip,lan865x"; spi-max-frequency = <20000000>; local-mac-address = [00 19 05 00 00 04]; reg = <0>; rst-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>; int-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>; plca-enable; plca-node-id = <3>; plca-node-count = <8>; plca-burst-count = <0x0>; plca-burst-timer = <0x80>; plca-to-timer = <0x20>; }; };

I can see that the clock and the MOSI are working with the osciloscope but no data from the LAN865x to the nordic board, even thouth I've tested the lan865x with a raspberry and linux driver and it's working fine, any insights would be helpful, thanks.

Best regards,

[Einar Thorsrud]

Hi,

I don't have experience with Lan865x but I expect it should be possible to get it to work. Can you share the device treein a more readable way (you can add code blocks using Inster -> Code). Please add also add the pinctrl configuration where you set the SPI pins? It could also be intersting to see the plot from the oscilliscope/logic analyzer.

[karenn]

Hi Einar

Here the DT that I've used : 

&arduino_spi {

    status = "okay";
    lan865x: lan865x@0 {
		status = "okay";
		compatible = "microchip,lan865x";
		spi-max-frequency = <20000000>;
		local-mac-address = [00 19 05 00 00 04];
		reg = <0>;
		rst-gpios = <&gpio0 10 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
	        int-gpios = <&gpio0 9 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
	        plca-enable;
                plca-node-id = <3>;
                plca-node-count = <8>;
                plca-burst-count = <0x0>;
                plca-burst-timer = <0x80>;
                plca-to-timer = <0x20>;

  };
};

for the pinctl in the dtsi file : 

/*
 * Copyright (c) 2022 Nordic Semiconductor
 * SPDX-License-Identifier: Apache-2.0
 */

&pinctrl {
	uart0_default: uart0_default {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 6)>,
				<NRF_PSEL(UART_RTS, 0, 5)>;
		};
		group2 {
			psels = <NRF_PSEL(UART_RX, 0, 8)>,
				<NRF_PSEL(UART_CTS, 0, 7)>;
			bias-pull-up;
		};
	};

	uart0_sleep: uart0_sleep {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 6)>,
				<NRF_PSEL(UART_RX, 0, 8)>,
				<NRF_PSEL(UART_RTS, 0, 5)>,
				<NRF_PSEL(UART_CTS, 0, 7)>;
			low-power-enable;
		};
	};

	uart1_default: uart1_default {
		group1 {
			psels = <NRF_PSEL(UART_RX, 1, 1)>;
			bias-pull-up;
		};
		group2 {
			psels = <NRF_PSEL(UART_TX, 1, 2)>;
		};
	};

	uart1_sleep: uart1_sleep {
		group1 {
			psels = <NRF_PSEL(UART_RX, 1, 1)>,
				<NRF_PSEL(UART_TX, 1, 2)>;
			low-power-enable;
		};
	};

	i2c0_default: i2c0_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 26)>,
				<NRF_PSEL(TWIM_SCL, 0, 27)>;
		};
	};

	i2c0_sleep: i2c0_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 26)>,
				<NRF_PSEL(TWIM_SCL, 0, 27)>;
			low-power-enable;
		};
	};

	i2c1_default: i2c1_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 30)>,
				<NRF_PSEL(TWIM_SCL, 0, 31)>;
		};
	};

	i2c1_sleep: i2c1_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 30)>,
				<NRF_PSEL(TWIM_SCL, 0, 31)>;
			low-power-enable;
		};
	};

	pwm0_default: pwm0_default {
		group1 {
			psels = <NRF_PSEL(PWM_OUT0, 0, 13)>;
			nordic,invert;
		};
	};

	pwm0_sleep: pwm0_sleep {
		group1 {
			psels = <NRF_PSEL(PWM_OUT0, 0, 13)>;
			low-power-enable;
		};
	};

	spi0_default: spi0_default {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 27)>,
				<NRF_PSEL(SPIM_MOSI, 0, 26)>,
				<NRF_PSEL(SPIM_MISO, 0, 29)>;
		};
	};

	spi0_sleep: spi0_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 27)>,
				<NRF_PSEL(SPIM_MOSI, 0, 26)>,
				<NRF_PSEL(SPIM_MISO, 0, 29)>;
			low-power-enable;
		};
	};

	spi1_default: spi1_default {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 31)>,
				<NRF_PSEL(SPIM_MOSI, 0, 30)>,
				<NRF_PSEL(SPIM_MISO, 1, 8)>;
		};
	};

	spi1_sleep: spi1_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 31)>,
				<NRF_PSEL(SPIM_MOSI, 0, 30)>,
				<NRF_PSEL(SPIM_MISO, 1, 8)>;
			low-power-enable;
		};
	};

	spi2_default: spi2_default {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 19)>,
				<NRF_PSEL(SPIM_MOSI, 0, 20)>,
				<NRF_PSEL(SPIM_MISO, 0, 21)>;
		};
	};

	spi2_sleep: spi2_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 19)>,
				<NRF_PSEL(SPIM_MOSI, 0, 20)>,
				<NRF_PSEL(SPIM_MISO, 0, 21)>;
			low-power-enable;
		};
	};

	qspi_default: qspi_default {
		group1 {
			psels = <NRF_PSEL(QSPI_SCK, 0, 19)>,
				<NRF_PSEL(QSPI_IO0, 0, 20)>,
				<NRF_PSEL(QSPI_IO1, 0, 21)>,
				<NRF_PSEL(QSPI_IO2, 0, 22)>,
				<NRF_PSEL(QSPI_IO3, 0, 23)>,
				<NRF_PSEL(QSPI_CSN, 0, 17)>;
			nordic,drive-mode = <NRF_DRIVE_H0H1>;
		};
	};

	qspi_sleep: qspi_sleep {
		group1 {
			psels = <NRF_PSEL(QSPI_SCK, 0, 19)>,
				<NRF_PSEL(QSPI_IO0, 0, 20)>,
				<NRF_PSEL(QSPI_IO1, 0, 21)>,
				<NRF_PSEL(QSPI_IO2, 0, 22)>,
				<NRF_PSEL(QSPI_IO3, 0, 23)>;
			low-power-enable;
		};
		group2 {
			psels = <NRF_PSEL(QSPI_CSN, 0, 17)>;
			low-power-enable;
			bias-pull-up;
		};
	};

	spi3_default: spi3_default {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
				<NRF_PSEL(SPIM_MISO, 1, 14)>,
				<NRF_PSEL(SPIM_MOSI, 1, 13)>;
		};
	};

	spi3_sleep: spi3_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
				<NRF_PSEL(SPIM_MISO, 1, 14)>,
				<NRF_PSEL(SPIM_MOSI, 1, 13)>;
			low-power-enable;
		};
	};

};

and for the lan8651 I'm using this evaluation board which I have tested with a Raspberry pi and it works fine : 

https://www.mikroe.com/two-wire-eth-click?srsltid=AfmBOoq4voSZdUgfa4Wwms7uturBa8gQrzeUtw5B4xtBP4m3zquLWpQm

Thanks,

[Einar Thorsrud]

Hi,

arduino_spi by default points to SPI3, and if you have kept that it means you have SCK on P1.15, MISO on P1.14 and MOSI on P1.13, which should be good (there are LEDs there as well on the DK so perhaps the signal integrity is not as good as it could have mbeen, but if it looks good on an oscillioscope plot that should be good.

I can see that the clock and the MOSI are working with the osciloscope but no data from the LAN865x to the nordic board

Can you compare the data sent from the nRF and when you use an RPi? What is the difference in the data sent to the Lan865x? Perhaps that will hint to some configuration issues.