nrf9160 prj.config issues

RE: nrf9160 prj.config issues

SuperAbe — Fri, 31 May 2019 05:57:33 GMT

Problem is solved. There was an issue with conflicting instances as mentioned in earlier posts.

I tried switching I2C2 and SPI3 to I2C3 and SPI2 again and for some reason it worked this time.

I think I just know my way better around the SDK so I must have missed something before.

RE: nrf9160 prj.config issues

DevinCallahan — Thu, 30 May 2019 21:37:33 GMT

There is this line in this zephyr driver file "zephyr/drivers/spi/Kconfig.nrfx"

# In Nordic SoCs, SPI and TWI peripherals with the same instance number
# share certain resources and therefore cannot be used at the same time
# (in nRF91 Series this limitation concerns UART peripherals as well).

It's not mentioned in the datasheet afaik so it's tricky.

RE: nrf9160 prj.config issues

SuperAbe — Sun, 26 May 2019 19:45:26 GMT

I found a solution to this problem:

Value of NRF_SPIM2_NS->PSEL.MOSI: 13 <-----Should be 30
Value of NRF_SPIM2_NS->PSEL.MISO: 18 <-----Should be 2

UART_2 from secure_boot was creaeting a conflict and restricted my from changing pins so I disabled UART_2.

Now my pin selections are correct:

Value of NRF_SPIM3_NS->PSEL.MOSI: 30
Value of NRF_SPIM3_NS->PSEL.MISO: 2
Value of NRF_TWIM2_NS->PSEL.SCL: 8
Value of NRF_TWIM2_NS->PSEL.SDA: 9
Value of NRF_TWIM2_NS->FREQUENCY: 26738688

SPI_3 works and I2C_3 work but they cannot be enabled simultaneously.

I am currently using SPI_3 and I2C_2 and I can flash to device but device stops at:

" error = i2c_transfer(i2c_dev, &msgs[0], 1, i); "

Please help if you have any idea.

Thank you

RE: nrf9160 prj.config issues

SuperAbe — Sat, 25 May 2019 17:43:14 GMT

I found the solution but I have another related issue now.

I was trying to use SPI_3 and I2C_3. this creates a conflics and prevents SES from loading the project.

For some reason zephyr + nrf9160 doesn't like it when you have SPI_x and I2C_x.

Solution is to change one I2C or SPI to SPI_x and I2C_y. (example I2C_2 and SPI_3).

The issue is that all I2C and SPI pins can't be redefined from .overlay or .dts files.

the only ports I can get to run are I2C_3 and SPI_3 but I can't run both at the same time.

I changed SPI_3 to SPI_2 with these pins:

&spi2 {
status = "ok";
sck-pin = <0>;
mosi-pin = <30>;
miso-pin = <2>;
//ss-pin = <14>;
spi-max-frequency = <4000000>;
};

When I printk pins locations I get:

Value of NRF_SPIM2_NS->PSEL.MOSI: 13 <-----Should be 30
Value of NRF_SPIM2_NS->PSEL.MISO: 18 <-----Should be 2

I have the same issue when I use I2C_2. Pin locations cannot be redefined.

Please help.

Thank you