Configure mcp2515 on jetpack 5.1

4nila97 · May 17, 2023, 2:52am

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 · May 17, 2023, 7:37am

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 · May 18, 2023, 8:30am

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 · May 19, 2023, 2:02am

Have you verified SPI loopback test for SPI1?

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

4nila97 · May 22, 2023, 8:14am

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 · May 23, 2023, 5:43am

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

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?

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

4nila97 · May 24, 2023, 5:55am

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 · May 24, 2023, 8:55am

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 · May 24, 2023, 9:04am

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 · May 25, 2023, 6:24am

###############################################################################
# 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?