EEPW论坛

#define I2C3_CLK_ADDR                    (0x4A0097B0)
#define I2C3_SDA_BASE_ADDR               (0x4A003774)
#define I2C3_SCL_BASE_ADDR               (0x4A003778)

void I2C3_Init(void)
{
    // 配置时钟使能
    HW_WR_REG32(I2C3_CLK_ADDR, 0x00000002);
    // 配置成I2C接口
    HW_WR_REG32(I2C3_SCL_BASE_ADDR, 0x00010002);
    HW_WR_REG32(I2C3_SDA_BASE_ADDR, 0x00050002);

    I2C_HwAttrs i2c_cfg;
    I2C_socGetInitCfg(pi2c->instance, &i2c_cfg);
    I2C_socSetInitCfg(pi2c->instance, &i2c_cfg);

    I2C_Params i2cParams;
    SemaphoreP_Params cbSemParams;

    I2C_Params_init(&i2cParams);
    i2cParams.transferMode = I2C_MODE_CALLBACK;
    i2cParams.bitRate = pi2c->bitrate;
    i2cParams.transferCallbackFxn = pi2c->callback;
    if(i2cParams.transferMode == I2C_MODE_CALLBACK)
    {
        I2C_osalSemParamsInit(&cbSemParams);
        cbSemParams.mode = SemaphoreP_Mode_BINARY;
        pi2c->cbSem = I2C_osalCreateBlockingLock(0, &cbSemParams);
    }
    pi2c->i2c_handle = I2C_open(pi2c->instance, &i2cParams);
    if(pi2c->i2c_handle == NULL)
    {
        M_TraceL("Error opening I2C driver\n");
    }

    CSL_xbarIrqConfigure(CSL_XBAR_IRQ_CPU_ID_DSP1, CSL_XBAR_INST_DSP1_IRQ_87, CSL_XBAR_I2C3_IRQ);
}