RTOS/AM5716: access width to I2C registers

Kzk

Genius 5785 points

Part Number: AM5716

Tool/software: TI-RTOS

Hi Experts,

I have a question about the access width to I2C registers.

TRM(SPRUHZ7H) has the following description.

CAUTION: The HS I2Ci registers are limited to 16-bit and 8-bit data accesses; 32-bit data access is not allowed and can corrupt register content.

But the latest CSL(PSDK-RTOSv5.2, PDKv1.0.13) has 32-bit access with HW_WR_REG32. Should I use 16-bit access with HW_WR_REG16?

C:\ti\pdk_am57xx_1_0_13\packages\ti\csl\src\ip\i2c\V2\priv\i2c.c

Regards,
Kzk

over 6 years ago

0 Rahul Prabhu over 6 years ago

TI__Guru** 116170 points

Kzk,

We have not observed any functional issues with the use of HW_WR_REG32 in the I2C functional CSL or from the I2C driver. I am not sure on the back ground of the note in the TRM so I have looped in folks on the HW team to clarify the note.

Regards,
Rahul

0 Kzk over 6 years ago in reply to Rahul Prabhu

Genius 5785 points

Hi Rahul,

Please let me know if you have got the information about the note in the TRM?

Regards,
Kzk

0 melissaw over 6 years ago in reply to Kzk

TI__Genius 15900 points

Hi Kzk,

This note is not applicable to AM57x and will be removed from the next TRM release.

Regards,
Melissa

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RTOS/AM5716: access width to I2C registers