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S32K144_DMA_SPI data lost

Question asked by dingsen zhou on Mar 2, 2020
Latest reply on Mar 5, 2020 by Diana Batrlova


I'm using DMA to transfer SPI data (NO SDK);

It is right to transmit 32bit,but when i transmit 10 groups of 32bit-data:

extern L9369_command DMA_SPI_L9369  = {0x11111111,0x22222222,0x33333333,0x44444444,0x55555555,0x66666666,0x77777777,0x88888888,0x99999999,0xaaaaaaaa};

The oscilloscope will lose several groups of data,and the first six groups of data are correct;

but when i  use single step transmission by using breakpoints , it is right .

why the data lost ?

thanks!Kirk HumphriesMandar JoshiRHinnenJames TrudeauMartin Wennerstromvcentea1 vcentea1Marc PaquetteRuth Hendrix