Configure mcp2515 on jetpack 5.1

[4nila97]

I’m able to initialized mcp2515 successfully, but I can send only one can frame, I need to set can interface down and up again to send can frame again. When I run candump, It doesn’t receive any can frames. When I try to send several can messages I get error: write: No buffer space available.

mcp2515	ORIN NX
INT	212 (GPIO10)
SCK	91 (SPI0_SCK)
SI	89 ((SPI0_MOSI)
SO	93 SPI0_MISO)
CS	95 (SPI0_CS0)
GND	GND
VCC	VDD_3V3

tegra234-mb1-bct-pinmux-p3767-hdmi-a03.dtsi

			ao_retention_n_pee2 {
				nvidia,pins = "ao_retention_n_pee2";
				nvidia,function = "rsvd2";
				nvidia,pull = <TEGRA_PIN_PULL_UP>;
				nvidia,tristate = <TEGRA_PIN_ENABLE>;
				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
				nvidia,io-high-voltage = <TEGRA_PIN_DISABLE>;
				nvidia,lpdr = <TEGRA_PIN_DISABLE>;
			};

			spi1_sck_pz3 {
				nvidia,pins = "spi1_sck_pz3";
				nvidia,function = "spi1";
				nvidia,pull = <TEGRA_PIN_PULL_DOWN>;
				nvidia,tristate = <TEGRA_PIN_DISABLE>;
				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
				nvidia,io-high-voltage = <TEGRA_PIN_DISABLE>;
				nvidia,lpdr = <TEGRA_PIN_DISABLE>;
			};

			spi1_miso_pz4 {
				nvidia,pins = "spi1_miso_pz4";
				nvidia,function = "spi1";
				nvidia,pull = <TEGRA_PIN_PULL_DOWN>;
				nvidia,tristate = <TEGRA_PIN_DISABLE>;
				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
				nvidia,io-high-voltage = <TEGRA_PIN_DISABLE>;
				nvidia,lpdr = <TEGRA_PIN_DISABLE>;
			};

			spi1_mosi_pz5 {
				nvidia,pins = "spi1_mosi_pz5";
				nvidia,function = "spi1";
				nvidia,pull = <TEGRA_PIN_PULL_DOWN>;
				nvidia,tristate = <TEGRA_PIN_DISABLE>;
				nvidia,enable-input = <TEGRA_PIN_DISABLE>;
				nvidia,io-high-voltage = <TEGRA_PIN_DISABLE>;
				nvidia,lpdr = <TEGRA_PIN_DISABLE>;
			};

			spi1_cs0_pz6 {
				nvidia,pins = "spi1_cs0_pz6";
				nvidia,function = "spi1";
				nvidia,pull = <TEGRA_PIN_PULL_UP>;
				nvidia,tristate = <TEGRA_PIN_DISABLE>;
				nvidia,enable-input = <TEGRA_PIN_DISABLE>;
				nvidia,io-high-voltage = <TEGRA_PIN_DISABLE>;
				nvidia,lpdr = <TEGRA_PIN_DISABLE>;
			};

tegra234-p3509-a02.dtsi

can_clock: can_clock {
		compatible = "fixed-clock";
		#clock-cells = <0>;
		clock-frequency = <20000000>;
		clock-accuracy = <100>;
	};

spi@3210000{ /* SPI1 in 40 pin conn */
		status = "okay";

		can0: spi@0 { /* chip select 0 */
			compatible = "microchip,mcp2515";
			reg = <0x0>;
			spi-max-frequency = <10000000>;
			clocks = <&can_clock>;
			nvidia,rx-clk-tap-delay = <0x7>;
			interrupt-parent = <&tegra_aon_gpio>;
			nvidia,enable-hw-based-cs;
			interrupts = <TEGRA234_AON_GPIO(EE, 2) IRQ_TYPE_LEVEL_LOW>;
			controller-data {
				nvidia,rx-clk-tap-delay = <0x10>;
				nvidia,tx-clk-tap-delay = <0x0>;
			};
		};

		spi@1 { /* chip select 1 */
			compatible = "tegra-spidev";
			reg = <0x1>;
			spi-max-frequency = <50000000>;
			controller-data {
				nvidia,enable-hw-based-cs;
				nvidia,rx-clk-tap-delay = <0x10>;
				nvidia,tx-clk-tap-delay = <0x0>;
			};
		};
	};

[KevinFFF]

Hi 4nila97,

What’s your carrier board in use for Orin NX?

Could you help to provide the result of the following command?

$sudo bysybox devmem 0x0243d040 //SPI1_MOSI
$sudo bysybox devmem 0x0243d018 //SPI1_MISO
$sudo bysybox devmem 0x0243d028 //SPI1_SCK
$sudo bysybox devmem 0x0243d008 //SPI1_CS0
$sudo bysybox devmem 0x0243d038 //SPI1_CS1

and also provide the serial console log for further check.

[4nila97]

I’m using custom board.

Result:

$sudo busybox devmem 0x0243d040 //SPI1_MOSI
0x00000404
$sudo busybox devmem 0x0243d018 //SPI1_MISO
0x00000444
$sudo busybox devmem 0x0243d028 //SPI1_SCK
0x00001444
$sudo busybox devmem 0x0243d008 //SPI1_CS0
0x00000408
$sudo busybox devmem 0x0243d038 //SPI1_CS1
0x00000059

Here is the console log
console.log (912.4 KB)

[KevinFFF]

Have you verified SPI loopback test for SPI1?

Please also provide pinmux spreadsheet in use and flash log for further check.

[4nila97]

Yes, I had verified SPI loopback test but only the RX result showed.

Sorry, I can’t upload the pinmux spreadsheet. It keeps giving me the error “The antivirus flagged this file as potentially malicious, so it can’t be uploaded”.

Flash log:
flashlog.txt (318.9 KB)

[KevinFFF]

@4nila97

I had verified SPI loopback test but only the RX result showed.

Could you help to refer to the following thread to do loopback test?
Jetson Nano SPI Bus Not Working - #10 by KevinFFF

@4nila97

I’m using custom board.

Does your custom board design refer to p3509 instead of Orin Nano devkit for Orin NX module?

Could you help to provide the following device tree?

1. Linux_for_Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-pinmux-p3767-hdmi-a03.dtsi
2. Linux_for_Tegra/bootloader/tegra234-mb1-bct-gpio-p3767-hdmi-a03.dtsi

[4nila97]

My custom board design is refer to p3509.

Loopback test result :

Pinmux device tree:
tegra234-mb1-bct-gpio-p3767-hdmi-a03.dtsi (3.9 KB)
tegra234-mb1-bct-pinmux-p3767-hdmi-a03.dtsi (67.8 KB)

[KevinFFF]

You pinmux seems all good for SPI usage.
Have you refer to the previous link I shared for SPI loopback test?

You should short MISO and MOSI first, and you would receive the data your send.

[4nila97]

Yes, i run loopback test based on the previous link you shared.

I have shorted MISO and MOSI pin but the result of RX and TX still different.

[KevinFFF]

###############################################################################
# L4T BSP Information:
# R35 , REVISION: 2.1

It seems you are using R35.2.1.
Could you help updating to latest R35.3.1 to verify?

or… Do you have the devkit to do the same loopback test to verify?