Random errors in XINTF read and write of F28335

larrywheels

Random errors in XINTF read and write of F28335 [Copy link]

When using the XINTF external CPLD of F28335 for reading and writing, I found that there would be 2 to 3 errors for every 200 reads and writes. Once an error occurs, the probability of subsequent errors is higher. Then I used an oscilloscope to capture the chip select cs7 when the error occurred, and found that it was not pulled low when writing data. Is there any solution?

Jacktang

The communication between F28335 and external CPLD seems to be abnormal.

Check the communication

larrywheels

Hello, the current situation is that the chip select of F28335 itself cannot be pulled down. I wonder if you have ever had a similar situation? What is the matter with the communication check you mentioned? I also feel that the problem now appears on the chip. In theory, as long as the chip select of xintf is configured, there is no need to operate it. Thank you