am335x向emmc发送CMD0无反应

GPMCClkConfig();
	    HWREG(0x44E00000 + 0xF4) = 0x00000002;//mmc1 clock on

	//PinMux Configuration
				//MMC1_D0~D7	pull_up mode2
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(8)) =0x00000032;
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(9)) =0x00000032;
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(10)) =0x00000032;
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(11)) =0x00000032;
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(12)) =0x00000032;
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(13)) =0x00000032;
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(14)) =0x00000032;
		HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_AD(15)) =0x00000032;
		//MMC1_CLK     no_pull mode2
		 HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_CSN(1)) =0x0000000A;
		//MMC1_CMD     pull_up mode2
		 HWREG(SOC_CONTROL_REGS + CONTROL_CONF_GPMC_CSN(2)) =0x00000032;



		HSMMCSDBusPower(SOC_MMCHS_1_REGS, HS_MMCSD_BUS_POWER_ON);//emmc power on
		HSMMCSDBusVoltSet(SOC_MMCHS_1_REGS,HS_MMCSD_BUS_VOLT_3P3);//power 3.3v
                Status = HSMMCSDBusFreqSet(SOC_MMCHS_1_REGS,0x1f4,0x1,0x0);//clock/500 小于400khz
                HSMMCSDBusWidthSet(SOC_MMCHS_1_REGS,HS_MMCSD_BUS_WIDTH_8BIT);//8 bit






		for (i=0; i<50000; i++);//wait for 74 more clock cycles

		HSMMCSDCommandSend(SOC_MMCHS_1_REGS,
				HS_MMCSD_CMD(MMCHS_CMD_INDX_CMD0, HS_MMCSD_CMD_TYPE_NORMAL, HS_MMCSD_NO_RESPONSE, HS_MMCSD_CM

D_DIR_READ) 

				,0x00000000,NULL,MMCHS_BLK_BLEN_SHIFT,0);//send CMD0 ->IDLE State

		Status = HSMMCSDIsCmdComplete(SOC_MMCHS_1_REGS, 0x00010000);

发送CMD0后用

 HSMMCSDIsCmdComplete（）去检查cmd是否完成，但是一直都没有成功，这是哪里没配置好吗？