Tiva C TM4C123GH6PM USB Host setup

Kurai Domi

Other Parts Discussed in Thread: TM4C123GH6PM

Hi there,

so I am trying to run my tiva c in usb host mode in order to connect a usb stick to the board, however i run into my faultISR on this line :

GPIOPinTypeUSBDigital(GPIO_PORTH_BASE, GPIO_PIN_3 | GPIO_PIN_4);

when i try to run the code from the tivaware usb manual

//
// Enable Clocking to the USB controller.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
//
// Enable the peripherals used by this example.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOH);
//
// Set the USB0EPEN and USB0PFLT pins to be controlled by the USB
// controller.
//
GPIOPinTypeUSBDigital(GPIO_PORTH_BASE, GPIO_PIN_3 | GPIO_PIN_4);
//
// Register the host class drivers.
//
USBHCDRegisterDrivers(0, g_ppsUSBHostClassDrivers,
g_ui32NumHostClassDrivers);
//
// Call any open routines on the device class interfaces here so that they
// are ready to receive callbacks if the device is already inserted on
// power on.
//
USBHMSCDriveOpen(0, MSCCallback);

//
// Initialize the host controller.
//
USBHCDInit(0, g_pui8HCDPool, HCD_MEMORY_SIZE);

tUSBHMSCInstance* device = USBHMSCDriveOpen(0, mscCallback);

while(USBHMSCDriveReady(device)) {

}

printf("Done initializing.\n");

I read something about 0-ohm resistors that need to be present for otg/host mode to work, is this related to my problem? If so, how would I go about attaching them to R25 and R29 on my tiva c?

Sorry If this sounds very newbish, however it is one of my first mc projects.

Thanks for the help.

over 11 years ago

0 Amit Ashara over 11 years ago

TI__Guru**** 244400 points

Hello Kural

On the TM4C123GH6PM GPIO Port H does not exist.

To map the USB0EPEN and USB0PFLT on the TM4C123GH6PM the following options exist

USB0EPEN: PF4 or PC6 or PD2

USB0PFLT: PC7 or PD3

For using the above pins (e.g. PD2 and PD3) the above will change to

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
//
// Set the USB0EPEN and USB0PFLT pins to be controlled by the USB
// controller.
//
GPIOPinTypeUSBDigital(GPIO_PORTD_BASE, GPIO_PIN_2 | GPIO_PIN_3);

Are you sure you are compiling the code with the correct define for PART_TM4C123GH6PM and TARGET_IS_BLIZZARD_RB1 ?

Regards

Amit

0 Kurai Domi over 11 years ago in reply to Amit Ashara

Prodigy 70 points

Hi Amit,

thanks for your reply.

I changed my code to what you suggested, now it wont trigger a fault interrupt anymore, however i still cant get my mass storage device to connect to the TM4C123GH6PM ( getting an infinite loop at

while(USBHMSCDriveReady(device)) {

Both defines you mentioned are defined in the compiler's build settings. I've been able to get device mode working, just host mode seems to be an issue. I am connecting a usb stick via a micro-usb adapter to the micro usb port, maybe thats the issue?

Thanks for your help.

0 Amit Ashara over 11 years ago in reply to Kurai Domi

TI__Guru**** 244400 points

Hello Kurai,

What about the DP DM signals. I do not see the same being configured. Also is this the TM4C123 LaunchPad you are using?

Regards

Amit

0 Kurai Domi over 11 years ago in reply to Amit Ashara

Prodigy 70 points

Hello Amit,

yep, I am using the TM4C123 LaunchPad for this. If they are not in the code I provided, I probably haven't set them up. How would I go about that? I believed I was good to go with the sample code provided by the manual, guess I was wrong :(

Btw, this is my setup if that helps:

0 Amit Ashara over 11 years ago in reply to Kurai Domi

TI__Guru**** 244400 points

Hello Kurai,

I am not sure from where you have picked up the code. But for reference you can refer to the following code in TIVAWare 2,1.0 release.

C:\ti\TivaWare_C_Series-2.1.0.12573\examples\boards\dk-tm4c123g\usb_host_audio

Please note that the code given here is for the DK-TM4C123 and not the LauncPad so you would need to check the Pin Configurations.

Regards

Amit

0 Kurai Domi over 11 years ago in reply to Amit Ashara

Prodigy 70 points

thanks for the hint Amit. the sample code i've been using comes from the tivaware usb library documentation.

i have trouble figuring out what pins i need on the launchpad. any pointers on that?

0 Amit Ashara over 11 years ago in reply to Kurai Domi

TI__Guru**** 244400 points

Hello Kurai,

The pins to be configured for USB can be got from the LaunchPad User Guide on the TIVA-C web site which has the Schematic and the Pin description for the USB Pads.

Regards

Amit

0 user4237830 over 10 years ago

Prodigy 10 points

Hello Kurai,

I had the same problem as yours and it didn't work until I had to do some soldering in the device:

1- Under the power switch there is three holes, you have to connect the ones above R14 and move the switch towards the device mode, you can use a wire but I did soldering for a fixed solution.
2- Populate 0-ohm resistors on R25 and R29 that are next to the USB connector, in my case I did normal soldering and it was fine.

0 Amit Ashara over 10 years ago in reply to user4237830

TI__Guru**** 244400 points

Hello user4237830,

A picture addition to the forum would be a great asset.

Regards
Amit

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Tiva C TM4C123GH6PM USB Host setup