CC2340R5: How to recover from an I2C error

Sorry.
I forgot to mention that.
I executed GPIO_setConfig after waking up.
I2C communication failed in step 11.

① I2C_transfer
② I2C error
③ I2C_close
④ GPIO_resetConfig(SCL)
⑤ GPIO_resetConfig(SDA)
⑥ Sleep
⑦ Wakeup
⑧ GPIO_setConfig(SCL)
⑨ GPIO_setConfig(SDA)
⑩ I2C_open
⑪ I2C_transfer

Hello mori.oq

I hope you are doing well. I created a similar code to what you provided above (minus the GPIO_reset/setConfig); however, my code did not display the same behavior as what you explained above (*as I2C still worked). 

#include <ti/drivers/I2C.h>
// Define name for an index of an I2C bus
#define SENSORS 0
// Define the target address of device on the SENSORS bus
#define OPT_ADDR 0x47
/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    uint8_t writeBuffer[3];
    uint8_t readBuffer[3];
    // One-time init of I2C driver
    I2C_init();
    // initialize optional I2C bus parameters
    I2C_Params params;
    I2C_Params_init(&params);
    params.bitRate = I2C_400kHz;
    // Open I2C bus for usage
    I2C_Handle i2cHandle = I2C_open(SENSORS, &params);
    // Initialize target address of transaction
    I2C_Transaction transaction = {0};
    transaction.targetAddress = OPT_ADDR;
    // Read from I2C target device
    transaction.readBuf = readBuffer;
    transaction.readCount = sizeof(readBuffer);
    transaction.writeCount = 0;
    I2C_transfer(i2cHandle, &transaction);
    // Write to I2C target device
    transaction.writeBuf = writeBuffer;
    transaction.writeCount = sizeof(writeBuffer);
    transaction.readCount = 0;
    I2C_transferTimeout(i2cHandle, &transaction, 5000);
    // Close I2C
    I2C_close(i2cHandle);
    sleep(1);
    I2C_open(SENSORS, &params);
    // Read from I2C target device
    transaction.readBuf = readBuffer;
    transaction.readCount = sizeof(readBuffer);
    transaction.writeCount = 0;
    I2C_transfer(i2cHandle, &transaction);
    // Write to I2C target device
    transaction.writeBuf = writeBuffer;
    transaction.writeCount = sizeof(writeBuffer);
    transaction.readCount = 0;
    I2C_transferTimeout(i2cHandle, &transaction, 5000);
    // Close I2C
    I2C_close(i2cHandle);
    return 0;
}

Thanks,
Alex F

Thank you for your reply.
Have you implemented "② I2C error"?

Hello Mori.oq,

Looks like my code did not do the same error in step 2 currently, thanks for pointing that out. Can you read the state of the status of the i2c transaction at step 11? (IE transaction.status = #)

Also which SDK version is this in.

Thanks,
Alex F

Thank you for your reply.
transaction.status is -5 (I2C_STATUS_ADDR_NACK).
The SDK version is 8.40.00.61.

Additional information:
I placed a metal object on pin 38 (PA5/SCL) of the CC2345R5 to cause an I2C error.
I removed the metal object immediately after the error occurred.