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How many bytes are in the fifo now?
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How many bytes are in the fifo now?

allbone posted on 03 Apr 2012 11:36 PM PST

1 Forum Post

 Hi, all

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Im working with a cmos sensor connected to the slave fifo of 68013, the frame sync signal of the cmos is captured by INT0. In the INT0 service routine, i want to insert some user defined bytes to the cmos data stream. My question is, how can i exactly know how many bytes are in the fifo now? Because the inserted bytes should not overwrite any cmos data that are already in the fifo. Can the EPxBCH:L register or Autopointer be helpful?

Thanks!




Re: How many bytes are in the fifo now?

Gayathri posted on 04 Apr 2012 04:55 AM PST
Cypress Employee
428 Forum Posts

 Hi,

 

EPxBCH:L will reflect the count (number of bytes) in  the endpoint. To modify the data using 8051, you need to configure it in manual mode. Please refer Technical reference manual (http://www.cypress.com/?rID=38232) and http://www.cypress.com/?rID=45850 for more info.

 

Regards,

Gayathri

 

 






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