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Interfacing with LDC1000 and FDC2112

Vasco Tesi46
Intellectual 360 points

Other Parts Discussed in Thread: TMS320F28069, FDC2112

Hi, we are developing a new project, using TMS320F28069 DSC which is connected to LDC1000 sensor through SPI and to FDC2112 sensor through I2C. 

For both LDC1000 and  FDC2112 interfacing, I'd like to use INTB pin (from sensor to DSC)  to trigger sensor data reading. 

Which is the best way to perform multiple data readings to DSC memory, using the DSC hardware at best with minimal DSC intervention? 

Thanks, Vasco

  • 0
    TI__Expert 8950 points

    Vasco,

    The INTB signals can trigger external interrupts on the F28069. There are three XINTs available, and they can be triggered by changes on GPIOs 0-31.

    The SPI and I2C modules have FIFOs, which can reduce the overhead of multi-byte reads. Please see the device technical reference manual for details.