Read value of control and status registers such as MR, Sn_MR, Sn_CR, Sn_SR are 0x00. Though I wrote some values into them. Registers like SIPR, GAR and TX_buffer registers return the correct value that I have put inside them.
Maybe anybody have faced the same problem?
You must be sure your MCU can communicate with W5500 via SPI interface.
Please check some point like below.
- pin connections of SPI interface
- whether you choose a proper clock for SPI
- Measure SPI signals if you have oscilloscope.
- etc.
javakys
Thanks for the reply, but I think you have misunderstood me. I read SIPR GAR, etc very well -So SPI interface is working!
I cannot read MR, Sn_SR - that’s the problem.
Hi,
May be a reset problem.
Have set properly tx/rx buffer after the reset routine?
