I2C err

[BreederBai]

The system triggers a watchdog restart when using I2C to read and write.And display the following content in the debug port.

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PANIC [mag_ist8310] i2c_lld_master_transmit_timeout

Core registers:
CONTROL 2
IPSR 0
APSR 600000



The code I wrote is as follows，

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static auto& I2C = I2CD1;
int write(std::uint8_t reg, std::uint8_t val)
{
    const std::array<uint8_t, 2> tx{ reg, val};

    return int(i2cMasterTransmitTimeout(&I2C,
                               HAL_COMPASS_IST8310_I2C_ADDR,
                               tx.data(),
                               tx.size(),
                               nullptr,
                               0,
                               TIME_INFINITE));
}

[Giovanni]

Are I2C pins programmed in the right way? do you have external pull up resistors? there are several possible causes for the I2C to hang, how you call that function is not very important.

Giovanni

[BreederBai]

Are I2C pins programmed in the right way? do you have external pull up resistors? there are several possible causes for the I2C to hang, how you call that function is not very important.

Giovanni

Hello, I am using PB6, 7 pins, configured as ‘Alternate Open Drain output 2MHz’ Mode, initial level is high.

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#define VAL_GPIOBCRL            0xEE222888
#define VAL_GPIOBCRH            0x88488A48
#define VAL_GPIOBODR            ((1 << 6) | (1 << 7))


The submission number of the ChibiOS I am using is 7d187a140e64db297eb5ef788f0f5dc0dd0d3fde, November 21, 2016 4:52 PM.
I have an external pull-up resistor and the pull-up resistor is 1K.

[Polux]

Resistors needed on both I2C pins.

Angelo

[BreederBai]

Resistors needed on both I2C pins.

Angelo

Sorry, it is my typo，that both pins have pull-up resistors.

[Giovanni]

Is the driver started?

Giovanni

[BreederBai]

Is the driver started?

Giovanni

yes

[BreederBai]

Is the driver started?

Giovanni

This is my code to enable I2C bus.

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static const I2CConfig I2CCfg =
{
    OPMODE_I2C,
    400000,
    FAST_DUTY_CYCLE_2
};

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i2cStart(&I2CD1,&I2CCfg);

[steved]

Which processor?

[BreederBai]

Which processor?

STM32F105RCT6