How to configure GPIO in program with bootloader? C6748-LCDK.

King Kong

Other Parts Discussed in Thread: OMAP-L138, OMAPL138

Hi,

I'm using C6748-LCDK, and want to set it in stand alone mode. Now I can download to flash and run it. But here I found a question.

A: The UARTpart can work properly with CCS in debug/release mode, and stand alone mode.

B: The LED part can work properly with CCS in debug/release mode. However, when I download it to flash, and try to run it in stand alone mode, the LEDs on board didn't blinking.

C: I combine UART with the LED, and use the UART as debug information printer in stand alone mode, and I found that the code was running, functions were called, but the LED still didn't blinking. Also, the register's value didn't change as what I wanted.

Here is part of my code.

/*
** Configures the I2C for the LED interface
*/
void LedIfConfig(void)
{
    /* Pin Multiplexing of pin 12 of GPIO Bank 6.*/ //GPIO 6-12/6-13

	UARTPuts("\n LedIfConig in. \n\r", -1);

    GPIOBank6Pin12PinMuxSetup();
    GPIOBank6Pin13PinMuxSetup();

    HWREG(0x01E26088)=0xffffcfff;
    UARTprintf("\n HWREG(0x01E26088)=0xffffcfff: 0x%x. \n\r",HWREG(0x01E26088));
    HWREG(0x01E26088)=0xffffffff;
    UARTprintf("\n HWREG(0x01E26088)=0xffffffff: 0x%x. \n\r",HWREG(0x01E26088));
    /* Sets the pin 109 (GP6[12][13]) as output.*/
    GPIODirModeSet(SOC_GPIO_0_REGS, 109, GPIO_DIR_OUTPUT);
    UARTprintf("\n GPIODirModeSet(109):0x%x. \n\r",HWREG(0x01E26088));
    GPIODirModeSet(SOC_GPIO_0_REGS, 110, GPIO_DIR_OUTPUT);
    UARTprintf("\n GPIODirModeSet(110): 0x%x. \n\r",HWREG(0x01E26088));
    HWREG(0x01E26088)=0xffffcfff;
    UARTprintf("\n HWREG(0x01E26088)=0xffffcfff: 0x%x. \n\r",HWREG(0x01E26088));
    UARTPuts("\n LedIfConig out. \n\r", -1);
}

/*
** Toggle the LED state
*/
void LedToggle(void)
{
	GPIOPinWrite(SOC_GPIO_0_REGS, 110, ledState);
    if(ledState == 0) ledState = 1;
    else ledState = 0;
	GPIOPinWrite(SOC_GPIO_0_REGS, 109, ledState);
}

/*
** Turn the  LED Off.
*/
void LedOff(void)
{
	GPIOPinWrite(SOC_GPIO_0_REGS, 109, GPIO_PIN_LOW);
	GPIOPinWrite(SOC_GPIO_0_REGS, 110, GPIO_PIN_LOW);

}


int main(void) {

	UARTConsoleInit();
	UARTPuts("\n Program is running. \n\r", -1);

	LedIfConfig();
	LedOff();
   /* Set up the Timer2 peripheral */
	TimerSetUp64Bit();

	/* Set up the AINTC to generate Timer2 interrupts */
	TimerIntrSetUp();

	/* Enable the timer interrupt */
	TimerIntEnable(SOC_TMR_2_REGS, TMR_INT_TMR12_NON_CAPT_MODE);

    /* Start the timer. Characters from cntArr will be sent from the ISR */
    TimerEnable(SOC_TMR_2_REGS, TMR_TIMER12, TMR_ENABLE_CONT);

	while(1);
}

-----------------------

In the function void LedIfConfig(void), the value in register GPIO0.DIR67 was printed.

The problem I found:

With CCS, each time the value will change as it supposed should be. LEDs are blinking.

Printed by UART:

::: Begin:::
Program is running.

LedIfConig in.

HWREG(0x01E26088)=0xffffcfff: 0xffffcfff.

HWREG(0x01E26088)=0xffffffff: 0xffffffff.

GPIODirModeSet(109):0xffffefff.

GPIODirModeSet(110): 0xffffcfff.

HWREG(0x01E26088)=0xffffcfff: 0xffffcfff.

LedIfConig out.

:::End:::

---------------------------------------------------

However, if I downloaded the program into flash, the results became like this:

::: Begin:::
Program is running.

LedIfConig in.

HWREG(0x01E26088)=0xffffcfff: 0x8801.

HWREG(0x01E26088)=0xffffffff: 0xe373763a.

GPIODirModeSet(109):0xe373763a.

GPIODirModeSet(110): 0xe373763a.

HWREG(0x01E26088)=0xffffcfff: 0xe373763a.

LedIfConig out.
::: End:::

So, what's the differences between the bootloader and the CCS when program runs? Do I need to KICK unlock something in the code with the bootloader? If so, how to do it?

The .gel file with CCS is the standard one from the startware (..\..\emulation\boards\lcdkc6748\gel\C6748_LCDK.gel).

Regards,

King

over 9 years ago

0 King Kong over 9 years ago

Intellectual 540 points

I appreciate anyone can help me out.

Thanks.

0 King Kong over 9 years ago in reply to King Kong

Intellectual 540 points

On website http://processors.wiki.ti.com/index.php/Boot_Images_for_OMAP-L138

It's mentioned that:

C6748 EVM

In this case, only the DSP program is required. The same instructions above apply with a few exceptions

Use the C6748-LED-x.cfg file to create C6748-LED-x.bin. Note that only the DSP application is needed as an input file
When flashing, use the -targetType C6748 option

However, I can't find the C6748-LED-x.cfg file.

The configure file I'm using is:

Boot Mode=NAND Flash
Boot Speed=115200
Flash Width=1
Flash Timing=3ffffffd
Configure Peripheral=False
Configure PLL0=True
Configure SDRAM=False
Configure PLL1=True
Configure DDR2=True
Configure LPSC=False
Configure Pinmux=True
Enable CRC=False
Specify Entrypoint=False
Enable Sequential Read=False
Use 4.5 Clock Divider=False
Use DDR2 Direct Clock=False
Use mDDR=False
Use DuplicateMddrSetting=False
ROM ID=3
Device Type=1
Input Clock Speed=24
Clock Type=0
PLL0 Pre Divider=1
PLL0 Multiplier=25
PLL0 Post Divider=2
PLL0 Div1=1
PLL0 Div3=3
PLL0 Div7=6
PLL1 Multiplier=25
PLL1 Post Divider=2
PLL1 Div1=1
PLL1 Div2=2
PLL1 Div3=3
Entrypoint=c1080000
SDRAM SDBCR=0
SDRAM SDTMR=0
SDRAM SDRSRPDEXIT=0
SDRAM SDRCR=0
DDR2 PHY=c5
DDR2 SDCR=134832
DDR2 SDCR2=0
DDR2 SDTIMR=264a3209
DDR2 SDTIMR2=3c14c722
DDR2 SDRCR=492
LPSC0 Enable=
LPSC0 Disable=
LPSC0 SyncRst=
LPSC1 Enable=13+
LPSC1 Disable=
LPSC1 SyncRst=
Pinmux=0:40000000+1:0+2:88888880+3:88888888+4:222200+5:111110+6:80880+7:0+8:0+9:0+10:0+11:0+12:0+13:8801+14:0+15:0+16:0+17:0+18:0+19:0+
App File String=
AIS File Name=

0 King Kong over 9 years ago in reply to King Kong

Intellectual 540 points

The flashing command line:

sfh_OMAP-L138.exe -flash_noubl -targetType C6748_LCDK -flashType NAND led.ais -p COM18

0 King Kong over 9 years ago in reply to King Kong

Intellectual 540 points

The problem of LED has found. The code didn't include the power control part. After I powered on the GPIO module, everything was done.

Thanks for your reading.

0 Titusrathinaraj Stalin over 9 years ago in reply to King Kong

TI__Guru** 116100 points

Hi King,

I am glad that you were able to solve the problem.

Thanks for your question with answers.

0 Hila Ratson over 8 years ago in reply to King Kong

Prodigy 50 points

Hi,

My name is hila and I'm working with the Kit that was downloded for initializing CCS for working with the C6748 .

Using the files in OMAPL138 folder I cant activated the LEDs.

What can I do?

Thanks,
Hla

0 King Kong over 8 years ago in reply to Hila Ratson

Intellectual 540 points

Hi Hla,

Sorry it's long time ago, and I didn't use this chip since then, so I cannot give you any help.

Maybe you can ask others for help. Good luck.

Regards

0 Senthilkumar Srinivasan over 8 years ago in reply to Hila Ratson

TI__Mastermind 43660 points

Hello Hila,

Hope you are using C6748 LCDK. I think the code that you mentioned above is not meant for LED. Please refer below thread where you can find the code to blink the LEDs in the C6748 LCDK board.

e2e.ti.com/.../495713

Regards,
Senthil

0 Titusrathinaraj Stalin over 8 years ago in reply to Hila Ratson

TI__Guru** 116100 points

Dear Hila,
In addition to Senthil's suggestions, please install the C6748 starterware package (if you are using C6748 LCDK board).
And try the following LED blink code.
C:\ti\C6748_StarterWare_1_20_04_01\examples\lcdkC6748\gpio

processors.wiki.ti.com/.../StarterWare
software-dl.ti.com/.../index_FDS.html

If still its not working, you might not be used the gel file to initialize the peripherals of processor.
Let us know if any issues.

0 Hila Ratson over 8 years ago in reply to Senthilkumar Srinivasan

Prodigy 50 points

Hi,

Thank you so much. I did it. they are working.

Regards,
Hila

0 Titusrathinaraj Stalin over 8 years ago in reply to Hila Ratson

TI__Guru** 116100 points

Sounds good.
Thanks for the update.

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How to configure GPIO in program with bootloader? C6748-LCDK.

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