Hercules RM48L952ZWT SPI2 and MIBSPI1 as GIO

To use spi as gio, take a look at the TRM, specifically the registers SPIPC4 (will set output) and SPIPC5(will clear output).  

to set
spi->PC4 = (uint32_t)1U << bit;

where spi is the spiBASE 

and spi->PC5 = (uint32_t)1U << bit; 

to clear

Hi Thank you. can spi->PC2 still be used to check the value to toggle output? i.e.,

if ((spiREG2->PC2 & (uint32)((uint32)1U << bit)) != 0U)
{
spiREG2->PC5 = (uint32_t)1U << bit; //clear
}
else
{
spiREG2->PC4 = (uint32_t)1U << bit; //set
}

This now worked for mibspi1 (i.e., mibspiREG1->PC5 = ...) so great thank you.  But not for spi2 (i.e., spiREG2->PC5 = ...)  Thank you again

Yes, that is exactly how I have my toggle function.

It should work exactly the same for spi 2. I'd double check your halcogen configurations to make sure the pins you want are set as gio and output. Also, I don't know if when you use mibspi if there is a separate init function to call, but make sure you are calling spiInit() and that the spi pins are set up correctly on the pin mux tab if necessary.

Hi Thank you. Yes, we configured it in HalCoGen in SPI2 tab (it was as straightforward as the others), and verified in debugger spiInit function is executed. Could there be something else configured blocking us from controlling SPI2 as GIO? The default HalCoGen had SPI active because the SDCard port was over SPI2 in the TI installation. The hardware engineers told me they moved the SDCard port to MIBSPI3 and SPI2 was now available as GIO. Is it possible something is still configured in HalCoGen with the old set up? Or for SPI2 to work as GIO, after they removed the contact to the SDCard slave processor, that something else needs to be done so we can use it as GIO? Thank you again.

Even though it is on MIBSPI3, can you run it in compatibility mode (so select SPI3 on the driver enable tab, not MIBSPI3) and then configure it using the settings that had been used on SPI 2 on the SPI 3 tab?

Make sure to select MIBSPI3 on the pinmux tab if needed.

Hi Thank you. Is there something special that needs to be done for MIBSPI3 to work as an SPI3 in compatibility mode?   See 3 attached screen shots and below of the oscilloscope, and the schematics of SDCard connected to SPI2 and then conntected to MIBSPI3/SPI3. Is there something wrong with the hardware and it has to be changed when connecting SDCARD to MIBSPI2/SPI3 vs SPI 2?  In attachment you can see the V5_MIBSPI3_nCS1 never pulled low.   you can see the signals for V5_MIBSPI3_nCS1 (ch2 blue color) and V9_MIBSPI3_CLK (ch1 yellow color).  V5_MIBSPI3_nCS1 is Active Low so it needs to pull low when interfacing with SD card.  However, it just stays high the whole time.  The clock frequency for V9_MIBSPI3_CLK looks funny  but it is the same as default from TI for SPI2/SDCard I.e., Data Format 0 Baud Rate 550 KHz, ...). Thankyou again.

MIBSPI3/SPI3

SPI2

Hi,

On looking on to your schematic I have a quick question for you.

on the HDK schematics SPI2CS0 connected to D3-CD in SPI-2

but you are using  MIBSPI3nCS1 connected to D3-CD in SPI-3

Any reason for not using MIBSPI3nCS0 ?

Thank you. We have done that with our OS vendor now. I have contacted Micrium now about their BSP. Thank you again.