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TMS320F280037C: Optimizing eCAP for Reliable 400 kHz Bitstream

Imthiaz Ahamed
Prodigy 30 points
Other Parts Discussed in Thread: TMS320F280037C

Hello,

I am using the TMS320F280037C microcontroller and the eCAP module to capture a 29-bit bitstream from the SCALE EV gate driver (2SP0215F2Q0C). The bitstream operates at 400 kHz, and each bit is determined based on pulse width.

I have successfully configured eCAP0 to read the bitstream, and it works correctly when I disable other interrupts. However, when additional interrupts (such as a high-priority 10 kHz ISR) are enabled, I notice bit errors compared to the oscilloscope data.

Questions:

  1. How can I optimize my system to reliably capture the bitstream without disabling other interrupts?
  2. Could the interrupt latency be a limiting factor, and if so, how can I reduce it?

Any guidance or example implementations would be greatly appreciated.

Thanks!