Jetson Nano SPI: jetson-io.py crash immediately

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi,
I’m trying to activate the SPI communication for the Jetson Nano Devkit using the jetson-io.py script.
As I run the script, it crashes immediately without output, and I can’t get the SPI to work(in contradiction, the same process succeeded on the Jetson Xavier NX).
What should I do?
Thank you in advance,
Gidi.

3

Have a check below doc for the “Note”,
Also if your Nano is emmc version then it can run the jetson-io too. You need to modify the dts for SPI funciton.

https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/hw_setup_jetson_io.html

4

I have already tried this, with no success.
The mentioned “note” is aimed to solve problem for L4T R32.3.1, and I’m using L4T R32.5.1.

5

Your board is emmc instead of sdcard version?

6

We tried both and failed to run it.

7

Add below pin for SPI in your dtb to enable it if can’t use jetson-io

		header-40pin-pinmux {
			phandle = <0x136>;
			linux,phandle = <0x136>;

			pin37 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x1>;
				nvidia,pins = "spi2_mosi_pb4";
				nvidia,function = "spi2";
			};

			pin28 {
				nvidia,io-high-voltage = <0x1>;
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x0>;
				nvidia,pins = "gen1_i2c_scl_pj1";
				nvidia,function = "i2c1";
			};

			pin27 {
				nvidia,io-high-voltage = <0x1>;
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x0>;
				nvidia,pins = "gen1_i2c_sda_pj0";
				nvidia,function = "i2c1";
			};

			pin26 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x2>;
				nvidia,pins = "spi1_cs1_pc4";
				nvidia,function = "spi1";
			};

			pin24 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x2>;
				nvidia,pins = "spi1_cs0_pc3";
				nvidia,function = "spi1";
			};

			pin23 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x1>;
				nvidia,pins = "spi1_sck_pc2";
				nvidia,function = "spi1";
			};

			pin22 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x1>;
				nvidia,pins = "spi2_miso_pb5";
				nvidia,function = "spi2";
			};

			pin21 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x1>;
				nvidia,pins = "spi1_miso_pc1";
				nvidia,function = "spi1";
			};

			pin19 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x1>;
				nvidia,pins = "spi1_mosi_pc0";
				nvidia,function = "spi1";
			};

			pin18 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x2>;
				nvidia,pins = "spi2_cs0_pb7";
				nvidia,function = "spi2";
			};

			pin16 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x2>;
				nvidia,pins = "spi2_cs1_pdd0";
				nvidia,function = "spi2";
			};

			pin13 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x1>;
				nvidia,pins = "spi2_sck_pb6";
				nvidia,function = "spi2";
			};

			pin10 {
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x1>;
				nvidia,pull = <0x2>;
				nvidia,pins = "uart2_rx_pg1";
				nvidia,function = "uartb";
			};

			pin8 {
				nvidia,enable-input = <0x0>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x0>;
				nvidia,pins = "uart2_tx_pg0";
				nvidia,function = "uartb";
			};

			pin5 {
				nvidia,io-high-voltage = <0x1>;
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x0>;
				nvidia,pins = "gen2_i2c_scl_pj2";
				nvidia,function = "i2c2";
			};

			pin3 {
				nvidia,io-high-voltage = <0x1>;
				nvidia,enable-input = <0x1>;
				nvidia,tristate = <0x0>;
				nvidia,pull = <0x0>;
				nvidia,pins = "gen2_i2c_sda_pj3";
				nvidia,function = "i2c2";
			};
		};
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