I want to check the waveform of the spi.
The waveforms I want to check are the spi0, spi1 of TX2i.
spi1 wants to check the waveform with the J21 header.
So I modified it by referring to the following website.
compatible = “spidev”;
reg = <0x0>;
spi-max-frequency = <0x1312D00>;
nvidia,cs-setup-clk-count = <0x1e>;
nvidia,cs-hold-clk-count = <0x1e>;
nvidia,rx-clk-tap-delay = <0x1f>;
nvidia,tx-clk-tap-delay = <0x0>;
We added this content to TX2i’s dtb file, “tegra186-quill-p3489-1000-a00-00-ucm1.dtb” and flash it with TX2i board.
/dev/spidev3.0 is enabled on the board, but the waveform does not appear.
/dev/spidev0.0 and /dev/spidev1.0 have been activated by adding the above code to the portion corresponding to spi0, spi1.
$ echo 1 > /dev/spi1.0
I connected to 19 (MOSI) / 23 (CLK) on the J21 header and checked the waveform, but it did not come out.
Is the content to be added differently for each spi0 and spi1?