TMS570LC4357 MibSPI chip select does not go low during transfer

Your code looks ok for selecting CS_1 as the chip select:

      ui16TempReg = ((uint16)(~((uint16)0xFFU ^ (uint16)ui8CpSelect)) & (uint16)0x00FFU);

But, why do you use the same buffer number as the start buffer of all the TGs (1~7)? Which TG is used for Data TX and RX in your application?

if(ui8RegN == 0U)
{
ui16RegM = 0U;
}
else
{
ui16RegM = ui16Size;
}
if(ui8RegN < 8U)
{
mibspiREG1->TGCTRL[ui8RegN] = (uint32)((uint32)1U << 30U) /* oneshot */
| (uint32)((uint32)0U << 29U) /* pcurrent reset */
| (uint32)((uint32)TRG_ALWAYS << 20U) /* trigger event */
| (uint32)((uint32)TRG_DISABLED << 16U) /* trigger source */
| (uint32)((uint32)ui16RegM << 8U); /* start buffer */
}
else
{
mibspiREG1->TGCTRL[8U] = (uint32)(ui16RegM) << 8U;
mibspiREG1->LTGPEND = (mibspiREG1->LTGPEND & 0xFFFF00FFU) | (uint32)((uint32)(((uint32)ui16RegM)-1U) << 8U);
}
}

Did you try the MibSPI functions generated by HALCoGen? 

Hello, 

Yes I tried it with Halcogen and found that on my TSM570LC4357 development kit (www.ti.com/.../TMDX570LC43HDK) no bit toggle is possible on CS0, CS1 and CS2. With CS3 a bit toggle is possible. With CS3 SPI messages can be sent.

Possibly there is a HW error here. What do you think?

Thank you very much.

Kind regards

Patrick

Hi Patrick,

There is a DIP switch on HDK. The SPI1CS0, SPI1CS1 are routed to the expansion connection only when the USB_HOST and Ethernet on DIP switch are turned "OFF". 

Hello,

thank you for the information. Where can I find this information?

Thank you in advance.

Kind regards

Patrick