Hello, I’m trying to communicate with an IMX264 sensor on a custom board. The problem is that I had to use SPI mode 3 but the CLK signal didn’t stay at high level when not used. [TEK00055] Like we can see on the oscilloscope (nCS in blue and CLK in yellow), the chip select falls and then the cloc…

I resolved my issue. I added a sleep before the gpio_set_value in the tegra_spi_setup_transfer_one function. if (cstate && cstate->cs_gpio_valid) { int gval = 0; if (spi->mode & SPI_CS_HIGH) gval = 1; usleep_range(2,4); gpio_set_value(spi->cs_gpio, gval); }

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Jetson Nano SPI mode 3 issue

Autonomous Machines Jetson & Embedded Systems Jetson Nano

jbzp00y March 10, 2021, 2:26pm 7

Hello,

I tried this patch without any success.