About the client
A global leader in the railway industry offering a complete portfolio of products and services, from high-speed trains, metro, monorails, and trams, to infrastructure, traffic control systems, and digital mobility solutions. The company is headquartered in France and currently operates in 70 countries with more than 70 000 employees.
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
