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About the client

Alstom- large manufacturer of regional airliners, business jets, mass transportation equipment, and recreational equipment, and a provider of financial services.

The challenge

The client was looking for support in a number of works related to the creation of a frequency generator. This included:

  • Fast Fourier Transformation for output signal adjustment in real time
  • Generating output with DAC with DMA.
  • Ethernet interface as a diagnostic interface
  • Multi microcontroller setup (STM32F1 as ATP Controller and STM32F4 as Main Controller)
  • Audio class-D amplifier as output
  • Xilinx CoolRunner-II CPLD (prototyping phase)

What we did

The EDG-6 Frequency Generator receives information from the master system (managing railway traffic) and generates on their basis a code specifying the permitted speed on a given section of the train path.

Our 3 Embedded Engineers were responsible for:

  • Creating an ATP Controller prototype based on CPLD,
  • Creating an ATP Controller prototype based on STM32F1,
  • Creating CPU software:
    • Selecting a measurement algorithm (FFT, window, Fsamp, buffer size),
    • Selecting an output generating algorithm (DAC, DMA), implementing the following software modules: Measurement Module, Frequency Generator Module, Diagnostic Module, ATP Module.
    • Adjustment tests,
    • Investigating the crosstalk effect,
    • Impedance measurement,
    • ATB code reading by the train – static test,
    • ATB code reading by the train – dynamic test
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