TM4C USB Keyboard and micro SD card interface problem

akshay joshi

Other Parts Discussed in Thread: TM4C123GH6PM

Hello,

I am trying to interface USB HID Keyboard with TM4C123GH6PM processor available on TIVA TM4C123GXL evaluation board.

While scanning for keyboard input, I am also reading analog pins, reading data serially, writing data on 16×2 LCD, and writing data on memory card after calculation.

Initially the keyboard responds perfectly, but after pressing any key it automatically stops responding due to which my program hangs up.

I am not able to rectify this problem can anyone help me on this.

Also I would like to know that, is there any limitation of interfacing micro SD card in terms of size with the evaluation board mentioned above?

I am using 4 GB micro SD Card.

Kindly help me on these two issues.

Thanks

Akshay Joshi

over 10 years ago

0 Amit Ashara over 10 years ago

TI__Guru**** 244400 points

Hello Akshay,

I don't think there is a problem with interfacing a 4GB Micro SD Card. The card is indirect addressing so it should be possible.

Regarding the earlier issue, did you try to check with the debugger where the code is stuck?

Regards

Amit

0 akshay joshi over 10 years ago in reply to Amit Ashara

Intellectual 275 points

Hello Amit,

Thank you for your support on my above query.

I don't know how to simulate the code via debugger. can you help me on that.

Regards

Akshay

0 akshay joshi over 10 years ago in reply to Amit Ashara

Intellectual 275 points

Hello,

I have checked my code, it goes and stucks to FAULT ISR routine every time I try to access SD card or USB Keyboard.

Any solutions please.....

Regards

Akshay Joshi

0 Amit Ashara over 10 years ago in reply to akshay joshi

TI__Guru**** 244400 points

Hello Akshay

Can you check what the contents of The FAULTSTAT and the FAULTADDR register is

Regards

Amit Ashara

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TM4C USB Keyboard and micro SD card interface problem