LAUNCHXL2-TMS57012: TMS570LS1224 SPIMaster SCK clock signal is always low

shufang wang

When I was programming TMS570LS1224SPI, I found that the clock signal of the development version was always low, and the output of SIMO and SOMI lines was also fixed. Here is my configuration section。

The signal waveforms I observed on the oscilloscope are as follows：

And I had the same problem trying I2C programming with this board before. I hope I can get guidance on how to solve this problem.

Thanks！

over 6 years ago

0 Miro over 6 years ago

TI__Mastermind 21425 points

Hello,

You should set pinmux of the corresponding pins. You can do this from HALCoGen-->PINMUX Tab.

0 whong zhao over 6 years ago in reply to Miro

Genius 4190 points

Hello

what does pinmux means?

When do I need to configure it?

thanks

0 Miro over 6 years ago in reply to whong zhao

TI__Mastermind 21425 points

Hello,

Pins can have multiplexed functions.Take a look at TRM, Chapter 4.
The signal multiplexing is controlled by each memory-mapped control register (PINMMRn).

Multiplexing can be set from HALCoGen-->PINMUX Tab

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LAUNCHXL2-TMS57012: TMS570LS1224 SPIMaster SCK clock signal is always low