[其他] i2c的配置

/**

* [url=home.php?mod=space&uid=555622]@prototype[/url] I2C_InitHardwr(void)

*

* @param[in] void

* @return         void

*

* [url=home.php?mod=space&uid=247401]@brief[/url]           Initalize I2C module.

*                         初始化I2C模块.

*/

void I2C_InitHardwr(void)

{

        I2C_ConfigType i2cConfig = {0};

        

        GPIO_SetFunc(I2C1_SDA_PIN, GPIO_FUNC_1);

        GPIO_SetFunc(I2C1_SCL_PIN, GPIO_FUNC_1);

        

        i2cConfig.setting.master = ENABLE;

        i2cConfig.setting.intEn  = ENABLE;

        i2cConfig.setting.i2cEn  = ENABLE;

        i2cConfig.setting.syncEn = ENABLE;

        i2cConfig.setting.nackIntEn = ENABLE;

        i2cConfig.setting.dmaRxEn = ENABLE;

        i2cConfig.setting.dmaTxEn = ENABLE;

        

        i2cConfig.addr1        = I2C_SLAVE_ADDR;

        #if (I2C_STAND_MODE)//100K波特率

        i2cConfig.sampleCNT = 11;//speed = APBclk/((sampleCnt+1)*(stepCNT+1)*2)

        i2cConfig.stepCNT = 19;

        #else //400K波特率

        i2cConfig.sampleCNT = 11;//speed = APBclk/((sampleCnt+1)*(stepCNT+1)*2)

        i2cConfig.stepCNT = 4;

        #endif

        I2C_SetEventCallback(I2C1, I2C_DMACallback);

        I2C_Initialize(I2C1, &i2cConfig);

}