About webui inflash but not have SD_CS_PIN

[XYartlab]

I found an issue. Currently, the SD card and LittleFS are in the same plugin. If I want to put the WebUI in flash, it enables the SD card plugin by default. Once the SD plugin is enabled by default, SD_CS_PIN must be defined for successful compilation, otherwise it throws "error: #error SD card plugin not supported!". However, my control board has no spare pins, and I only want to put the WebUI on flash.
Additionally, I found that in this version, the Ethernet module must be defined as "#define SPI_CS_PIN 17
#define WIZNET_CS_PIN 17" to compile; defining it as "#define SPI_CS_PIN 17" causes an error("D:/grblHAL/260419_RP2040/w5x00_ll_driver.c:33:15: error: 'WIZNET_CS_PIN' undeclared here (not in a function)

33 | .cs_pin = WIZNET_CS_PIN,
| ^~~~~~~~~~~~~")
By the way, I noticed that µCNC already supports using SN74HC165D for input expansion. For the RP2040, using SN74HC595 for output expansion (already supported in grblHAL) and SN74HC165D for input expansion can easily solve the IO shortage problem in grblHAL. I'm designing a new control board using this strategy. Please consider adding this feature: using PIO to drive SN74HC165D for expanded input pins.

[terjeio]

If I want to put the WebUI in flash, it enables the SD card plugin by default.

Not if you mount littlefs as root by adding #define LITTLEFS_ENABLE 2 in my_machine.h. I'll have to add this option to all drivers capable of running littlefs and document it...

Please consider adding this feature: using PIO to drive SN74HC165D for expanded input pins.

I'll have to order some to do that. FYI on my todo list is additional inputs via an I2C expander that support interrupt on pin changes, a shift register does not and has to be continuously polled for changes.

[XYartlab]

#if defined(WEBUI_ENABLE) && WEBUI_ENABLE
#ifndef WEBUI_INFLASH
#define WEBUI_INFLASH 1
#endif
#if WEBUI_INFLASH
#if defined(LITTLEFS_ENABLE) && LITTLEFS_ENABLE == 0
#undef LITTLEFS_ENABLE
#endif
#ifndef LITTLEFS_ENABLE
#define LITTLEFS_ENABLE 1
#endif
#endif
#endif
I noticed the above code in RP2040's driver.h. When I define "#define LITTLEFS_ENABLE 2" in map.h and compile directly, it throws an error (roughly meaning the two definitions conflict). However, when I change the above code to "#define LITTLEFS_ENABLE 2", the firmware compiles and the webui works normally.
The above code may require some modifications, and some comments need to be added in my_machine.h to explain how to save the webui in flash without enabling the sdcard plugin.

[terjeio]

When I define "#define LITTLEFS_ENABLE 2" in map.h and compile directly, it throws an error (roughly meaning the two definitions conflict).

For now, #undef LITTLEFS_ENABLE before changing it in the map file.