TMS570LC4357: Question about the MibSPI.

uint16_t data[4]={0};
uint16_t command[1]={0x9F};
uint8_t i;
uint32_t ID;

mibspiSetData(mibspiREG4,0,command);

mibspiTransfer(mibspiREG4,0);

while(mibspiIsTransferComplete(mibspiREG4,0)==1){
c(mibspiREG4,0,data);

ID|=data[0]<<24;
mibspiGetData(mibspiREG4,0,data);
ID|=data[1]<<16;
mibspiGetData(mibspiREG4,0,data);
ID|=data[2]<<8;
mibspiGetData(mibspiREG4,0,data);
ID|=data[3];
}

From your example, the command is 1 16-bit data. 

When you set the MibSPI TX buffers (8 buffers in your config), the first buffer is filled with 0x9F, but the 2nd to 7th buffers are unknown value in the SRAM. Do those 7 unknow value affect the Flash's response? 

data[4]={0}; --> I guess the number of  return for command 0x9F is 4 16-bit values. Is a delay between command and return data required? If the Flash returns only 4 values, why do your define TG0=8 buffer?

My suggestions:

1. Use SPI mode instead of MibSPI mode

2. define charlen=8 rather than 16

3. Define command[4]={0x9F, 0x0, 0x,0, 0x0}; data[4]={0};

4. Check flash device if CSHOLD is accepted or not.

4. use spiTransmitAndReceiveData() in poling mode, and spiSendAndGetData() in interrupt mode to get dat