TMS570LS SPI as GIO

dzoelham dzoelham

Prodigy 125 points

Other Parts Discussed in Thread: HALCOGEN

Dear fellow engineer.

Does anybody know how to set SPI pin as GIO pin and change the value in the source code?

Best Regards.

Dzoelham

over 10 years ago

0 Jan Cumps over 10 years ago

Guru 15740 points

In HALCoGen, enable the SPI and GIO driver,

Then, on the SPI TAB,

there is a SPIX Port subtab,

on that tab, you can select if the SPI port is GIO.

Take care that you call gioInit() and spiInit()

You can use the gio functions to talk to the pins. Pass the SPI port and pin numbers.

It works just like a standard gio pin.

There is an example somewhere from TI on how to use HET as general GIO. The same applies here.

0 Jan Cumps over 10 years ago in reply to Jan Cumps

Guru 15740 points

0 Jan Cumps over 10 years ago in reply to Jan Cumps

Guru 15740 points

I have attached a HALCoGen and CCSv6 project that toggles the SPI1 SOMI pin using gioToggleBit().

8446.SPI_as_GIO.zip

sys_main.c:

/* USER CODE BEGIN (1) */
#include "gio.h"
#include "spi.h"
/* USER CODE END */

/* USER CODE BEGIN (3) */

	uint32_t wait_counter = 0;

	gioInit();
	spiInit();


	// toggle the SPI1 SOMI port with GIO
	while (1) {
		gioToggleBit(spiPORT1, 11);
		for(wait_counter=0;wait_counter< 40000;wait_counter++); //wait some time.
	}
/* USER CODE END */

0 Jean-Marc Mifsud over 10 years ago in reply to Jan Cumps

TI__Mastermind 22375 points

Thank you Jan for these detailed explanations.

0 Jan Cumps over 10 years ago in reply to Jan Cumps

Guru 15740 points

Hi Dzoelham,

Does his example work for you?

0 dzoelham dzoelham over 10 years ago in reply to Jan Cumps

Prodigy 125 points

Hi Jan Cumps,

How do we determine the SPI pin number assignment?

In your code the SPI1 SOMI pin number is 11. How do I know the pin number assignment of SPI Port

in TMS570LS20216SPGE?

Best Regards

0 Jan Cumps over 10 years ago in reply to dzoelham dzoelham

Guru 15740 points

the example project that I have attached above has a comment that indicates what section of the datasheet has that info.

you can also have a look at the source file spi.c. By looking at it you can derive the pin assignments. They are commented in the spiInit() code.

In spnu517a.pdf ,p. 879:

Table 21-11. SPI Pin Control Register 2 (SPIPC2) Field Descriptions

in spi.c:

    /** - SPI1 Port output values */
    spiREG1->PC3 =    (uint32)((uint32)1U << 0U)  /* SCS[0] */
                    | (uint32)((uint32)1U << 1U)  /* SCS[1] */
                    | (uint32)((uint32)1U << 2U)  /* SCS[2] */
                    | (uint32)((uint32)1U << 3U)  /* SCS[3] */
                    | (uint32)((uint32)0U << 8U)  /* ENA */
                    | (uint32)((uint32)0U << 9U)  /* CLK */
                    | (uint32)((uint32)0U << 10U)  /* SIMO[0] */
                    | (uint32)((uint32)0U << 11U);  /* SOMI[0] */

0 dzoelham dzoelham over 10 years ago in reply to Jan Cumps

Prodigy 125 points

Ok Jan.

Thank you for your help

0 Miguel Amezcua Peregrina over 8 years ago in reply to Jan Cumps

Genius 4015 points

Hi Jan

I was wondering if the same applies for the MBSPIX, since im going to be using most of those pins as GIO

best regards

0 Jan Cumps over 8 years ago in reply to Miguel Amezcua Peregrina

Guru 15740 points

I do not know what MBSPIX is, Miguel Amezcua Peregrina . Is that for Hercules?

0 Miguel Amezcua Peregrina over 8 years ago in reply to Jan Cumps

Genius 4015 points

Sorry is the MIBSPIX, the MultiBufer SPI modules

0 Jan Cumps over 8 years ago in reply to Miguel Amezcua Peregrina

Guru 15740 points

Hi,

The MibSPI and SPI modules are physically the same hardware inside the chip.

If you choose SPIx on the driver tab, you maintain the settings on the SPIx tab,
when you choose MibSPIx on the driver tab, you maintain the settings on the MIBSPIx tab.
But in the end you speak to the same physical pins. You can make them GIO on the Port sub-tab in both scenarios.

0 Miguel Amezcua Peregrina over 8 years ago in reply to Jan Cumps

Genius 4015 points

ooh I see...
One last question about this part...
I looked for the register on my MCU but can you give me an example of how to set a value (0-1) on the pin?? I have already configured it as output on Halcogen

best regards!!

0 Jan Cumps over 8 years ago in reply to Miguel Amezcua Peregrina

Guru 15740 points

You use the same gioSetBit() api.

As first parameter, take the port of the (MIBSPI/SPI) pin you want to drive, and as second parameter the bit for that particular pin.

If your pin is on (MIB)SPI 1, and you enabled the MIBSPI driver for module 1, the port is called mibspiPORT1 .
If you enabled the SPI driver for module 1, the port is called spiPORT1 .

side note: these are actually the very same address locations. Here is their definition created by HALCoGen

#define mibspiPORT1 ((gioPORT_t *)0xFFF7F418U)
#define spiPORT1 ((gioPORT_t *)0xFFF7F418U)

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TMS570LS SPI as GIO