LP-MSPM0L2228: When using Display_printf the string sometimes outputs discontinuously

Eason Tsai

Part Number: LP-MSPM0L2228

Tool/software:

Hi,

I am currently using the i2c_target example on the LP-MSPM0L2228, and I am trying to apply the I2C target own address alternate feature.

It was found that when using Display_printf, the string sometimes outputs discontinuously in i2cTargetCallback function, as shown in the reference image below.

However, the Display_printf in the mainThread function doesn't have this issue. Does anyone know the reason for this? thanks.

static int_fast16_t i2cTargetCallback(

I2CTarget_Handle handle, I2CTarget_Event event, uint8_t *val)

{

/* Omit certain parts */

uint32_t test_val = 0x12;

Display_printf(display, 0, 0, "Display printf test: %0x \n", test_val);

return retCode;

}

over 1 year ago

0 Sal Ye over 1 year ago

TI__Mastermind 25405 points

Hi Eason,

How is i2c TargetCallback used in application.

One possible reason is that the printf process is broken.

I suppose you are using freertos i2c target example, and there might have some limitation for task management.

B.R.

Sal

0 Eason Tsai over 1 year ago in reply to Sal Ye

Prodigy 110 points

Hi Sal,

Thank you for the response. I later discovered that shortening the string can prevent this issue from occurring.

Although I’m not sure what the exact cause is.

Best Regards,

Eason Tsai

0 Sal Ye over 1 year ago in reply to Eason Tsai

TI__Mastermind 25405 points

Hi Eason,

So it looks like other task/interrupt break the operation.

And seems the stack is damaged with this.

B.R.

Sal

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LP-MSPM0L2228: When using Display_printf the string sometimes outputs discontinuously