c6748 mcasp+edma数据接收问题咨询

请确认一下是否有串行时钟了？
Before GBLCTL is programmed, you must ensure that serial clocks are running. If the corresponding external serial clocks, ACLKX and ACLKR, are not yet running, you should select the internal serial clock source in AHCLKXCTL, AHCLKRCTL, ACLKXCTL, and ACLKRCTL before GBLCTL is programmed. Also, after programming any bits in GBLCTL you should not proceed until you have read back from GBLCTL and verified that the bits are latched in GBLCTL.
www.ti.com/.../spruh79c.pdf

另外一定要回读GBLCTL寄存器确保数据写进去了。
5.4.1 You Did Not Read Back From GBLCTL After Writing to GBLCTL
www.ti.com/.../sprack0.pdf

你好，我只需要接收，接了ACLKR，AFSR，AHCLKR以及数据接口AXR[12]，ACLKR，AFSR，AHCLKR这几个时钟是有的，这几个时钟由ADC音频芯片AK5574输出。