is it possible to show speed on stm32

If you want a example to play with that uses the accelerators,

There is a CMSIS-PACK for the MCBSTM32F400 called 'Demo'

Open the Pack installer, C:\Keil_v5\uv4\PackInstaller.exe

- On the top left of the window, select the "Boards" tab,
- Below it for search, type "MCBSTM32F400" and press enter.
- Select the board from the list below – on the right side of the dialog updates with Software Packs relevant to this device
- For Packs, install the Keil:STM32f4xx_DFP pack (if necessary)
- On the top right of the screen, select the yellow "Examples" tab.
- On the "Demo (MCBSTM32F400)" row, click the "copy" button - a dialog pops up.
- Pick a directory, click both the checkboxes, and press OK - a new Keil µVision session opens with the example.

Demo.c, line 357 calls Accelerometer_GetState()

=====

On the http://www.keil.com/books/genbooks.asp page, take a look at the 'Numerical Recipes in C' book - it might help you.

Or, google around

electronics.stackexchange.com/.../implementing-differentiation-and-integration-in-a-digital-control-system

If you want a example to play with that uses the accelerators,

There is a CMSIS-PACK for the MCBSTM32F400 called 'Demo'

Open the Pack installer, C:\Keil_v5\uv4\PackInstaller.exe

- On the top left of the window, select the "Boards" tab,
- Below it for search, type "MCBSTM32F400" and press enter.
- Select the board from the list below – on the right side of the dialog updates with Software Packs relevant to this device
- For Packs, install the Keil:STM32f4xx_DFP pack (if necessary)
- On the top right of the screen, select the yellow "Examples" tab.
- On the "Demo (MCBSTM32F400)" row, click the "copy" button - a dialog pops up.
- Pick a directory, click both the checkboxes, and press OK - a new Keil µVision session opens with the example.

Demo.c, line 357 calls Accelerometer_GetState()

=====

On the http://www.keil.com/books/genbooks.asp page, take a look at the 'Numerical Recipes in C' book - it might help you.

Or, google around

electronics.stackexchange.com/.../implementing-differentiation-and-integration-in-a-digital-control-system

i could able to show acceleration as 9.8 m/s2 on lcd by using accelerometer. now i want to show velocity in numberical value by integrating the acceleration.