SPI Problem with CH32V003

[fulda1]

Hi,

I'm trying to build SPI example (https://github.com/openwch/arduino_core_ch32/blob/main/libraries/SPI/examples/SPIFlash/SPIFlash.ino) for CH32V003.

Unfortunately receiving error:
.../riscv-none-embed/bin/ld.exe: ...libraries\SPI\utility\spi_com.c.o: in function "spi_init": spi_com.c:(.text.spi_init+0x10): undefined reference to "PinMap_SPI_MOSI" .../riscv-none-embed/bin/ld.exe: spi_com.c:(.text.spi_init+0x16): undefined reference to "PinMap_SPI_MOSI"

Seems, some issue with board definition.

[maxint-rd]

When I started using the V003 I had a similar issue.

Sounds like you may have SPI module disabled. In the original v1.0.4 core you need to enable/disable modules using this configuration file. To save flash space only enable the modules you actually use. In my own personal environment I modified the board.txt/platform.txt files to have those peripherals in the menu. If you like to dig deeper you can see how I did that in PR #200 .

I recommend users to first update their v1.04 core with the files of the current latest master branch. It contains many improvements. Just download the zip file and copy all files over the existing v1.0.4 files.

Secondly you can review the currently open PR's to see if they fix your specific needs. Unfortunately WCH only provides incidental support for this core. Their latest activity dates from last april, but didn't include any significant merging of PR's.

[fulda1]

Ach, you are right.
That is sad, in distributed branch 1.0.4 is different config than in main. I did deep dive in "main", then I did not understand.
Thank you for info

[maxint-rd]

Kind of sad indeed. If you look in the issues you can see various people asking for a new release. I'm afraid many potential Arduino users got disappointed by their first experience and moved on to other platforms.

The two things I like most of the CH32 family are the affordability and ease of real-time debugging. For that reason I spent quite some time to gain better understanding and was able to contribute improvements that helped to make this core more usable.

The current master branch already has many improvements. On top of that there are more good improvements and fixes in the various PR's. If you find things not working like you expected, please have a look at the open PR's.

I did deep dive in "main", then I did not understand.

To install latest master code, you only need to download the zip-file and manually copy its contents over the installed v1.0.4 code. Step 4 of these instructions give you more info. (From the readme I made for PR #200).

I believe the current state is perhaps not ideal, but it's better than nothing. Perhaps with some effort the community is able to keep this core up and running and improve it along the way.