nRF51822 accelerometer

RE: nRF51822 accelerometer

walterLIte — Mon, 21 Aug 2017 06:29:58 GMT

I am struggling with this as well, did you ever get the LIS3DH interface to the nRF51x22 Can you share your code and experiences·

Thank you !!

RE: nRF51822 accelerometer

Yasmine_Chtourou — Tue, 31 Mar 2015 21:46:13 GMT

thx a lot @Stian i don't know what's the right question to ask . Thank you for your help =)

RE: nRF51822 accelerometer

Stian Røed Hafskjold — Sun, 29 Mar 2015 21:13:28 GMT

It is easier to help you if you post your code. Then I can try to track down where the problem is.

RE: nRF51822 accelerometer

Stian Røed Hafskjold — Sun, 29 Mar 2015 21:10:42 GMT

What exactly is not working? Does the code compile? Does the chip run? Are you not seeing any activity with a logic analyser?

RE: nRF51822 accelerometer

Yasmine_Chtourou — Fri, 27 Mar 2015 14:01:58 GMT

I tryied to includethe spi driver as shown in the mater example but it didn't work . even the master example can not be load to the ship . I didn't figure out how to include this driver !

RE: nRF51822 accelerometer

Stian Røed Hafskjold — Fri, 27 Mar 2015 09:50:20 GMT

You need to be more specific than that:) What is not working? Are you able to use the SPI master on the nRF51 at all? Are you able to compile and flash the code to the chip? Do you have a logic analyzer so you can see the traffic on the SPI bus? Do you know the principle behind SPI communication? How to read and write to registers? Did you look at the accelerometer datasheet and determine which registers you need to write to in order to initialize the chip (if needed)? Did you find the address of the output registers in the datasheet? Did you try to read out information from these output registers?

RE: nRF51822 accelerometer

Yasmine_Chtourou — Thu, 26 Mar 2015 23:23:02 GMT

thanks a lot =) . If i may i ask again : i saw the spi mater example but still i didn't figue out how can i read the x axis , y axis and z axis data ?

RE: nRF51822 accelerometer

Stian Røed Hafskjold — Thu, 26 Mar 2015 09:03:27 GMT

Go download the SDK: developer.nordicsemi.com/.../

Open up the SPI master example. This example includes the spi_master.h and shows how to use it.

RE: nRF51822 accelerometer

testy — Thu, 26 Mar 2015 05:02:24 GMT

Did you see: link ? Tested, works.

RE: nRF51822 accelerometer

Yasmine_Chtourou — Wed, 25 Mar 2015 15:30:46 GMT

I Want to use SPI , does Nordic provide a DRIVER_SPI.h ?

RE: nRF51822 accelerometer

Stian Røed Hafskjold — Mon, 23 Mar 2015 10:34:00 GMT

In the schematic it's written LIS3DSh , but i didn't find any useful information about it .

If you google LIS3DSH, the first result points to the datasheet: www.st.com/.../DM00040962.pdf

In chapter 6 in that datasheet the interfaces are described (SPI and I2C).

The nRF51 supports both SPI and I2C. If you download the SDK we have an example on how to use the SPI: developer.nordicsemi.com/.../a00046.html

The SPI driver is documented here: developer.nordicsemi.com/.../a00011.html

And the TWI driver is documented here: developer.nordicsemi.com/.../a00014.html

RE: nRF51822 accelerometer

Yasmine_Chtourou — Sun, 22 Mar 2015 22:59:02 GMT

In the schematic it's written LIS3DSh , but i didn't find any useful information about it .

RE: nRF51822 accelerometer

RK — Sun, 22 Mar 2015 07:13:59 GMT

What accelerometer chip do you want to use? You need to find one, then connect it via I2C or whatever other interface it uses and read the data off it.