NCS1.8 how to change the SPI1 pins?

RE: NCS1.8 how to change the SPI1 pins?

yoyou — Thu, 17 Feb 2022 01:14:01 GMT

thanks,Simon

i've got it,

It's a little difficult from SDK to NCS.

RE: NCS1.8 how to change the SPI1 pins?

Simon — Wed, 16 Feb 2022 12:02:08 GMT

Building an NCS/Zephyr project happens in two phases:

Configuration phase
- This is driven by CMake and will go through all the Kconfigs, prj.conf, .dts and .overlay files and generate the ninja files
- If you change the prj.conf or .overlay file, you need to run this
Build phase
- This is driven by ninja and will only see the changes done to the .c/.h files
- If you change fore example main.c it is enough to run this

When you rebuild the project in SES, it will only run the Build phase, check out the ticket SEGGER Embedded Studio Nordic Edition for NCS doesn't update .config for modified prj.conf to see how to run configuration phase+build phase.

However, you did say that you reloaded the project, so it's strange that it didn't work then

RE: NCS1.8 how to change the SPI1 pins?

yoyou — Wed, 16 Feb 2022 08:40:31 GMT

Hellow,

thanks Simon.

this is the answer.

created file nrf52840dk_nrf52840.overlay as follow pic:

SES

reload project and rebuild, it still runing whit old pin.

it means nrf52840dk_nrf52840.overlay not used.

but,when i delete folder build_nrf52840dk_nrf52840

and recreated,the pin had changed.

VS CODE

build it will changed.not need delete folder and recreate.

thanks

Best Regards

RE: NCS1.8 how to change the SPI1 pins?

yoyou — Wed, 16 Feb 2022 02:37:30 GMT

Hi，Simon

thanks for reply.

i created file nrf52840dk_nrf52840.overlay as follow:

i connect P1.13 to P1.14,

reload project and rebuild, it still runing whit old pin.

it means nrf52840dk_nrf52840.overlay not used.

but,when i delete folder build_nrf52840dk_nrf52840

and recreated,the pin had changed.

I don't know why, it's too much trouble.

thanks

Best Regards

RE: NCS1.8 how to change the SPI1 pins?

Simon — Tue, 15 Feb 2022 00:35:56 GMT

You should not modify zephyr.dts, that will have no effect on the running program. If you read Build System --> Configuration Phase you will see that Zephyr.dts is not used by application and is only meant for debugging, however, the content in the header files devicetree_unfixed.h (located in \zephyr\tests\drivers\spi\spi_loopback\<build folder>\zephyr\include\generated\devicetree_unfixed.h) and devicetree.h (located in \zephyr\include\devicetree.h) is seen and will be used by your application. But you should not modify devicetree_unfixed.h or devicetree.h either. The correct way to do it is to add the content to an overlay file of the name <board name>.overlay (see set devicetree overlays for other options) and put the content in there.

Do the following to modify the Device Tree (DTS):

Create a file named nrf52840dk_nrf52840.overlay (if you use a different board, for example nrf52dk_nrf52832, set it to nrf52dk_nrf52832.overlay) inside \zephyr\tests\drivers\spi\spi_loopback and add the following content:

&spi1 {
    compatible = "nordic,nrf-spim";
    status = "okay";
    mosi-pin = < 30 >; //0x1e in hex
};

&spi2 {
	status = "disabled";
};

&qspi {
	status = "disabled";
};

Delete build folder spi_loopback/<build folder>
Build again
- west build -b nrf52840dk_nrf52840
Check the output in spi_loopback/<build folder>/zephyr/zephyr.dts, and you will see that spi2 and qspi is disabled and that spi1 mosi uses the pin 30 (0x1e)

Best regards,

Simon

RE: NCS1.8 how to change the SPI1 pins?

yoyou — Sun, 13 Feb 2022 03:52:38 GMT

Hello,

i've disabled QSPI and SPI2.

when i change it to 0x1e,and disabled others,

the same using old pin.

when i only change label = "SPI_9" in file zephyr.dts,

#define CONFIG_SPI_LOOPBACK_DRV_NAME "SPI_3"

it is still runing spi3.

so, i think modifying anything in zephyr. dts doesn't work.

i do not know how to change it or change it somewhere.

SDK17 is easy change pin, but NCS1.8 no way.

thanks

Best Regards

RE: NCS1.8 how to change the SPI1 pins?

Simon — Sat, 12 Feb 2022 18:31:27 GMT

The reason it won't work using P0.20 is because it is connected to the SIO (DIO) on the QSPI as mentioned in this reply. In order to use P0.20, you need to cut SB12 and short SB22, take a look at nRF52840 DK-->External memory:

Best regards,

Simon

RE: NCS1.8 how to change the SPI1 pins?

yoyou — Sat, 12 Feb 2022 02:19:50 GMT

Hello,

thanks for reply,

i delete project,reset get project form NCS1.8.0,

default code #define CONFIG_SPI_LOOPBACK_DRV_NAME "SPI_3"

only change SPI_3 pins,(mosi-pin to 20)

It seems that zephyr.dts has not been accepted, even if both files are modified at the same time. reload and recompile, but it still use the old pins.

thanks

Best Regards

yuyou

RE: NCS1.8 how to change the SPI1 pins?

Simon — Fri, 11 Feb 2022 18:22:49 GMT

I was able to use spi1 with \zephyr\tests\drivers\spi\spi_loopback\nrf52840dk_nrf52840.overlay after applying these changes:

diff --git a/tests/drivers/spi/spi_loopback/boards/nrf52840dk_nrf52840.conf b/tests/drivers/spi/spi_loopback/boards/nrf52840dk_nrf52840.conf
index 10b6dafdb8..b824187b8f 100644
--- a/tests/drivers/spi/spi_loopback/boards/nrf52840dk_nrf52840.conf
+++ b/tests/drivers/spi/spi_loopback/boards/nrf52840dk_nrf52840.conf
@@ -1,7 +1,7 @@
-CONFIG_SPI_3_NRF_ORC=0x00
-CONFIG_SPI_3_NRF_RX_DELAY=1
+CONFIG_SPI_1_NRF_ORC=0x00
+#CONFIG_SPI_1_NRF_RX_DELAY=1
 
-CONFIG_SPI_LOOPBACK_DRV_NAME="SPI_3"
+CONFIG_SPI_LOOPBACK_DRV_NAME="SPI_1"
 CONFIG_SPI_LOOPBACK_CS_GPIO=y
 CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_DRV_NAME="GPIO_0"
 CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_PIN=28
diff --git a/tests/drivers/spi/spi_loopback/nrf52840dk_nrf52840.overlay b/tests/drivers/spi/spi_loopback/nrf52840dk_nrf52840.overlay
new file mode 100644
index 0000000000..059b380903
--- /dev/null
+++ b/tests/drivers/spi/spi_loopback/nrf52840dk_nrf52840.overlay
@@ -0,0 +1,10 @@
+&spi1 {
+    compatible = "nordic,nrf-spim";
+    status = "okay";
+    miso-pin = < 0x2e >;
+    mosi-pin = < 0x2d >;
+};
+
+&spi3 {
+    status = "disabled";
+};
\ No newline at end of file