topic Re: Error when initialize I2C_3 on 5746C in S32 SDK

Error when initialize I2C_3 on 5746C

shenminns — Wed, 09 Dec 2020 10:13:15 GMT

Hi,

When my program runs to the following code:

static inline void I2C_ResetModuleState(I2C_Type *baseAddr)
{
/* Reset the I2C Bus Control Register values */
baseAddr->IBCR = 0x80;

/* Reset the I2C Bus Interrupt Configuration Register */
baseAddr->IBIC = 0x00;
}

It goes to IVOR1_Handler immediately.

The function I2C_ResetModuleState() was called by I2C_DRV_MasterInit() on the SDK.

The configuration and log of the registers are attached, hope it will be helpful.

Many thanks!

Re: Error when initialize I2C_3 on 5746C

PetrS — Thu, 10 Dec 2020 12:15:34 GMT

Hi,

it looks like module is not clocked. Check in clock manager is the module is not gated off.

Also within a code, you can check actual peripheral status in ME_ME_PS1 register.

BR, Petr

Re: Error when initialize I2C_3 on 5746C

shenminns — Thu, 10 Dec 2020 14:44:15 GMT

Dear Petr,

Thank you so much for your solution. It was exactly what you said, I missed the configuration in the clock manager. And now it's OK. Thanks again.

Re: Error when initialize I2C_3 on 5746C

shenminns — Sun, 13 Dec 2020 14:37:27 GMT

Dear Petr,

Though the problem was solved, I still have some questions: why the clock error leads to the result of bits errors on MCSR-BUS_WRERR/G/ST/MAV? Or why did you think it was the clock problem that caused the error on MCSR-BUS_WRERR/G/ST/MAV?

Thanks again!