W6300-evb-pico QSPI in Dual or Quad mode

Question

In the samples and port code presented in https://github.com/WIZnet-ioNIC/WIZnet-PICO-C , The file qspi_pio.c has multiple /* @todo: Implement to use. */ comments for QSPI in dual and Quad mode, and the chip does not initialize when using them. What should be done to get dual and quad mode to actually work?

Aimee0 · Answer

The /* @todo: Implement to use. */ comments appear to be leftover and unintentionally pushed, rather than indicating missing functionality. Dual and Quad QSPI modes do not require additional implementation. They can be enabled using the configuration described in the README. By defining the following macro, Quad mode works properly: add_definitions(-D_WIZCHIP_QSPI_MODE_=QSPI_QUAD_MODE) In summary, the TODO comments can be ignored, and Quad mode can be used by applying the above setting.