CH32V203 I2C1 读写24C02 EEPROM

void IIC_Init(u32 bound, u16 address)

{

GPIO_InitTypeDef GPIO_InitStructure={0};

I2C_InitTypeDef I2C_InitTSturcture={0};

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );

RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1, ENABLE );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init( GPIOB, &GPIO_InitStructure );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init( GPIOB, &GPIO_InitStructure );

I2C_InitTSturcture.I2C_ClockSpeed = bound;

I2C_InitTSturcture.I2C_Mode = I2C_Mode_I2C;

I2C_InitTSturcture.I2C_DutyCycle = I2C_DutyCycle_2;

I2C_InitTSturcture.I2C_OwnAddress1 = address;

I2C_InitTSturcture.I2C_Ack = I2C_Ack_Enable;

I2C_InitTSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

    I2C_Init( I2C1, &I2C_InitTSturcture );

I2C_Cmd( I2C1, ENABLE );

I2C_AcknowledgeConfig( I2C1, ENABLE );

}

用这段初始化，pb6,pb7接24C02 都正常

===============================================

void IIC_Init(u32 bound, u16 address)

{

GPIO_InitTypeDef GPIO_InitStructure={0};

I2C_InitTypeDef I2C_InitTSturcture={0};

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );

GPIO_PinRemapConfig(GPIO_Remap_I2C1, ENABLE);

RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1, ENABLE );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init( GPIOB, &GPIO_InitStructure );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init( GPIOB, &GPIO_InitStructure );

I2C_InitTSturcture.I2C_ClockSpeed = bound;

I2C_InitTSturcture.I2C_Mode = I2C_Mode_I2C;

I2C_InitTSturcture.I2C_DutyCycle = I2C_DutyCycle_2;

I2C_InitTSturcture.I2C_OwnAddress1 = address;

I2C_InitTSturcture.I2C_Ack = I2C_Ack_Enable;

I2C_InitTSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

    I2C_Init( I2C1, &I2C_InitTSturcture );

I2C_Cmd( I2C1, ENABLE );

I2C_AcknowledgeConfig( I2C1, ENABLE );

}

用这段初始化，PB8,PB9接24C02 就不正常

卡死在下面这段

FlagStatus I2C_GetFlagStatus(I2C_TypeDef *I2Cx, uint32_t I2C_FLAG)

{

    FlagStatus    bitstatus = RESET;

    __IO uint32_t i2creg = 0, i2cxbase = 0;

    i2cxbase = (uint32_t)I2Cx;

    i2creg = I2C_FLAG >> 28;

    I2C_FLAG &= FLAG_Mask;

    if(i2creg != 0)

    {

        i2cxbase += 0x14;

    }

    else

    {

        I2C_FLAG = (uint32_t)(I2C_FLAG >> 16);

        i2cxbase += 0x18;

    }

    if(((*(__IO uint32_t *)i2cxbase) & I2C_FLAG) != (uint32_t)RESET)

    {

        bitstatus = SET;

    }

    else

    {

        bitstatus = RESET;

    }

    return bitstatus;

}

痲烦工程师们给看一下，问题在那里

你好，需要打开复用IO时钟

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE );

引脚复用相关详细内容参考https://www.cnblogs.com/wchmcu/p/17278478.html

可以了，谢谢