Devicetree SPI node interrupt asserts

[kahlenberg]

Hi,

I want to connect X-NUCLEO-NFC08A1 with ST25R3916B to nRF5340 board by adding a SPI node to device-tree source. After compiling and flashing the board, triggering interrupt causes an assertion.

For tests, I trigger interrupt manually with a wire. I couldn't find the root cause.

Device-tree file nrf5340dk_nrf5340_cpuapp.overlay:

&spi1 {
	compatible = "nordic,nrf-spim";
	status = "okay";
	cs-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;

	pinctrl-0 = <&spi0_default_alt>;
	pinctrl-1 = <&spi0_sleep_alt>;
	pinctrl-names = "default", "sleep";
	st25r3916b@0 {
		compatible = "st,st25r3916b";
		reg = <0>;
		spi-max-frequency = <4000000>;
		irq-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
		//led-nfca-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
	};
};

&arduino_spi {
	status = "disabled";
};

&arduino_i2c {
	status = "disabled";
};

&arduino_serial {
	status = "disabled";
};

&arduino_header{
	status = "disabled";	
};

&arduino_adc{
	status = "disabled";	
};

&pinctrl {
	spi0_default_alt: spi0_default_alt {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
				<NRF_PSEL(SPIM_MOSI, 1, 13)>,
				<NRF_PSEL(SPIM_MISO, 1, 14)>;
		};
	};

	spi0_sleep_alt: spi0_sleep_alt {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
				<NRF_PSEL(SPIM_MOSI, 1, 13)>,
				<NRF_PSEL(SPIM_MISO, 1, 14)>;
			low-power-enable;
		};
	};
};

 

Logs:

ASSERTION FAIL @ WEST_TOPDIR/zephyr/kernel/sem.c:136
E: r0/a1:  0x00000004  r1/a2:  0x00000088  r2/a3:  0x00000000
E: r3/a4:  0x00010ed1 r12/ip:  0x80000000 r14/lr:  0x000168ef
E:  xpsr:  0x6100003f
E: Faulting instruction address (r15/pc): 0x00018f5c
E: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
E: Fault during interrupt handling

Converting address to source code line number...

C:\arm-none-eabi-addr2line.exe build\zephyr\zephyr.elf 0x00018f5c

..gives C:/ncs/v2.6.0/zephyr/lib/os/assert.c:44

And the r14/lr:  0x000168ef gives:

C:\arm-none-eabi-addr2line.exe build\zephyr\zephyr.elf 0x000168ef

C:/ncs/v2.6.0/zephyr/include/zephyr/spinlock.h:136

[Naeem Maroof]

Hi

Is the ST driver available in zephyr?

I can not see "st,st25r3916b" in the zephyr dt-binding list.

[kahlenberg]

You are right, there was no driver for st25r3916b, I copied the driver for st25r3911b and modified (renamed files, modified Kconfig...) it for st25r3916b. But the problem is that I should not use the zephyr driver in device tree, because driver is already implemented in STM library. I want to use STM library.

So, I need to use SPI without any device driver. 

Now my question is changed to: How can I use SPI without device-tree node?

[Naeem Maroof]

You can get the spi instance from the DT using zephyr Device api, e.g using DEVICE_DT_GET.

Maybe, this example could be relevant to your use-case: SPI Master Slave Sample NCS

Please look into the overlays and the source code.

Regards,
Naeem

[kahlenberg]

Ok, in device-tree, can a node  be added to spi instance only with reg = <0> (chisp-select) property? I tried and built it. But before building it, my intellisense in VSCode shows always an error, that a node must have "compatible" property. But anyway, it compiles well :)

github.com/.../nrf5340dk_nrf5340_cpuapp.overlay

[Naeem Maroof]

It should be okay as long as it is getting compiled correctly.