Problem
In my application, all spi reads duplicate the first-byte read, and ignore the last byte read.
any suggestions are appreciated.
thank you
bud
OSA_Init(); EDMA_DRV_Init(&dmaController1_State, &dmaController1_InitConfig0); DSPI_DRV_EdmaMasterInit(FSL_DSPICOM1, &dspiCom1_MasterState, &dspiCom1_MasterConfig0, &dspiCom1_dmaTcd); DSPI_DRV_EdmaMasterConfigureBus(FSL_DSPICOM1, &dspiCom1_BusConfig0, &dspiCom1_calculatedBaudRate);//startup as slow bus static uint8_t header[5]; header[0]=1; header[1]=2; header[2]=3; header[3]=4; header[4]=5; static uint8_t readdata[5]; readdata[0]=0; readdata[1]=0; readdata[2]=0; readdata[3]=0; readdata[4]=0; DSPI_DRV_EdmaMasterTransferBlocking(FSL_DSPICOM1, NULL, header, readdata, 5, 1000u); //readdata == {1,1,2,3,4} after this command (it should be 1,2,3,4,5))
i have included the project
to duplicate this problem tie mosi and miso together (PTD6,PTD7)
Kinetis Design Studio Version: 3.0.0
Processor Expert for Kinetis 3.0.1
KSDK_1.2.0
SCOPE DECODE SETTINGS
CPOL = 0
CPHA = 1
CS POLARITY = ACTIVE LOW
BIT ORDER = MSB
BITS PER WORD = 8
Message was edited by: bud Arriola the previous code I uploaded was for the wrong package ic. I updated the project to have the correct ic. ( The same result can be seen, also if the spi baud rate is lowered then only 3 out of the five bytes will transfer and the cs line will be stuck low.)
Message was edited by: bud Arriola I fixed the problem by disabling auto-initialization in the dspi component and the DMA controller though I don't understand why it was wrong.
Original Attachment has been moved to: working-FRDM-K22F-project.zip
Original Attachment has been moved to: FRDM-K22F-project.zip
