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TMS320F28388D: data buffer

Feng Dong
Intellectual 550 points
Part Number: TMS320F28388D
Other Parts Discussed in Thread: C2000WARE

Tool/software:

Hello, I want to use F28388D,  there is a case i have to ask for your help.

if i use F28388D to receive data through high speed SPI (use dma mode). If the length of DMA buffer is 8, when the SPI interface receive 8 data,  MCU will get a interrupt from SPI interface and then MCU read SPI data, and then SPI DAM can be ready to receive new data. if MCU do not move away these data, the coming data will miss? right? is there a mechanism which use new data to cover old data? i just want the latest data

  • 0
    TI__Genius 10645 points

    Hi Feng,

    Please refer to the spi_ex5_loopback_dma in C2000WARE as a basis for your development. You can modify the example to match your requirements such as high-speed mode. 

    Best Regards,

    Aishwarya

  • 0 in reply to Aishwarya Rajesh
    Intellectual 550 points

    Hi  this question is not about SPI High speed, it is about data quetion,  if these data were not read away by MCU, can SPI interface receive new data? or these new data will miss?

  • 0
    TI__Genius 10645 points

    Feng,

    Apologies for the delay due to the U.S. Holidays. If the interrupt is not triggered when using interrupts and/or data is not read, the data will remain in the buffer until it's overwritten in the next transmission. At that point, we cannot recover old data.

    Best Regards,

    Aishwarya