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SSI2 and LCD conflict Issue

Narendra Kulkarni29
Intellectual 590 points
Other Parts Discussed in Thread: TM4C129XNCZAD

Hello 

We are making a TM4C129xNCZAD microcontroller based custom board.

We are interfacing a 480x272 LCD in raster board (we are at present using only 4 bpp, so we are setting aside 64K of SRAM for framebuffer) and RFID reader(MAXIM Reader IC) is interfaced over SSI2.  I am using separate GPIO pin for CS.

We are facing a weird problem explained below

When LCD is enabled 

 The application to read/write to the RFID tag is able to detect the tag. All further operation of selecting Tag, Reset the Tag, Read/Write to the Tag fails.

The moment LCD is disabled 

The same application is able to detect tag, select Tag, Reset the Tag, Read/Write to the Tag 

I will be uploading the  relevant parts of the code (after removing some code  that is under NDA ) tomorrow.

Is there any conflicts between SSI2 and LCD controller on TM4c129XNCZAD

Platform:

TI-RTOS 2.14

ARM Compiler 5.2.5

Controller: TM4C129XNCZAD

Thanks in Advance

Narendra