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  • RFFT CMSIS-DSP - Fluctuating index

    I am using the Cortex M4 with CMSIS 5.4.0 DSP library. I'm using the arm_rfft_f32() function and the max_arm_f32() function to compute the maximum frequency bin of injected pure sine wave with an external CODEC. SSI0 and uDMA are being used to take in…

  • Cortex M4 (SIMD) - Fastest way to un-pack 1 (one) uint32 to 4 (four) uint8

    Hi to you all,
    In my current project I need to send over a serial bus an array of integers:

    • type = unsigned 32 bit integers
    • length = 4096

    The driver I'm using (actually USB CDC VCOM from NXP, which is embedded in LPCOpen) takes pointer to unit8 and…

  • Machine learning in low-power devices brings sound recognition to the smart home market

    The Smart Home market is now at an inflection point. Early devices in the market were connected to the internet but were typically single-function, often lacking connectivity to other devices and with closed APIs, denying the user the ability to design…

  • Cortex-M processors in DSP applications. Why not?

    Have you ever been in a situation where you successfully validated your algorithm and asked yourself: is there a hardware platform with DSP capabilities so I can get my embedded project to market quickly? Guess what: other people have dealt with the…