DAC3484

求教：DAC3484的SYNC、FRAME、OSTR、DATACLK连接到FPGA，在进行到配置步骤31时，都是正常的，读出的05的值不存才alarm的标识，但是随后进行32到36任何一项，都会触发寄存器05的alarms_from_fifo的Pointers are 2 away、Pointers are 1 away、FIFO pointer collision，只要对寄存器进行写操作都会触发alarm，在此期间txenable保持为0，没有数据传输。始终alarm清不掉.

设计中使用DAC3484芯片输出信号，上电后，对其的配置过程如下：

Kailyn Chen：

上电时序没问题吧？关于alarm配置，请按照下面这个顺序：
Alarm monitoring is implemented as follows:
• Power up the device using the recommended power-up sequence.
• Clear all the alarms in config5 by setting them to 0.
• Unmask those alarms that will generate a hardware interrupt through the ALARM pin in config7.
• Enable automatic DAC shut-off in register config2 if required.
• In the case of an alarm event, the ALARM pin will trigger. If automatic DAC shut-off has been enabled the
DAC outputs will be disabled.
• Read registers config5 to determine which alarm triggered the ALARM pin.
• Correct the error condition and re-synchronize the FIFO.
• Clear the alarms in config5.
• Re-read config5 to ensure the alarm event has been corrected.
• Keep clearing and reading config5 until no error is reported.

Seasat Liu：

按照DAC3484的评估板软件，先生成一份初始的寄存器表吧

user4359409：

回复 Seasat Liu:

按照软件配置的寄存器试过了，还是一样的效果，clear 寄存器0x05的alarm之后，只要对其他寄存器有操作，就会有alarm触发.