An SPI port is configured as a master, and all the signals seem to operate correctly except the SPI_MOSI.
The configuration is shown below. When the spi_transceive_dt() function is used, the CS and CLK likes operate as expected, but the MOSI line does not toggle. There is data in the TX buffer that is non-zero and data is read on the MISO line. Is there a configuration problem that is preventing the MOSI signal from working? Checking the configuration register for SPI21, the MOSI pin selection looks correct (0x02);
spi21_default: spi21_default {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 1, 18)>,
<NRF_PSEL(SPIM_MISO, 3, 7)>,
<NRF_PSEL(SPIM_MOSI, 0, 2)>;
};
};
spi21_sleep: spi21_sleep {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 1, 18)>,
<NRF_PSEL(SPIM_MISO, 3, 7)>,
<NRF_PSEL(SPIM_MOSI, 0, 2)>;
};
&spi21 {
compatible = "nordic,nrf-spim";
status = "okay";
cs-gpios = <&gpio1 19 GPIO_ACTIVE_LOW>;
pinctrl-0 = <&spi21_default>;
pinctrl-1 = <&spi21_sleep>;
pinctrl-names = "default", "sleep";
w5500device: w5500device@0 {
compatible = "vnd,spi-device"; // raw/manual SPI access
reg = <0>;
spi-max-frequency = <4000000>;
};
};
