It looks like FastLED isn't compatible with STM32F103C microcontroller

[tutankhamen]

It's weird because I can see

#elif defined(STM32F10X_MD)

in platform.h, but still getting:

fatal error: avr/io.h: No such file or directory

[stevstrong]

You should use in your code
#elif defined (ARDUINO_ARCH_STM32F1)

[ajkeeton]

I tried that and now FastLED is searching for application.h which isn't included anywhere I've seen

[nk64]

I was able to get my Blue Pill (Generic STM32F103C Series) working with FastLED by following the instructions in this comment by @evq #142 (comment)

The main point for me was to manually merge in https://github.com/evq/FastLED/tree/stm32f103
which at the time boiled down to these 5 files:
"FastLED\platforms\arm\stm32\led_sysdefs_arm_stm32.h"
"FastLED\platforms\arm\stm32\clockless_arm_stm32.h"
"FastLED\platforms\arm\stm32\fastpin_arm_stm32.h"
"FastLED\led_sysdefs.h"
"FastLED\platforms.h"

I also did the code change to reduce the sketch size dramatically:
#142 (comment)

[ajkeeton]

Any interest in trying to get a pull request open? If not I might fork and try to get the ball rolling

[evq]

@ajkeeton Last time I offered to PR it didn't seem like there was interest. Maybe that's changed now that there's a larger community around the Blue Pill?

Please feel free to fork and attempt a PR, I'd love to see it merged and maintained!

I would suggest cherry-picking the following commit, there's a missing pin definition.
treeoftenere@8bea714

There's also this branch https://github.com/treeoftenere/FastLED/commits/tenere with parallel output. <3 @shlomozippel

[13rac1]

👍 I'm using @evq 's branch with PlatformIO and a maple mini clone: https://github.com/eosrei/FastLED-STM32/commits/stm32f103

[kolyshkin]

#568

[Fxlr8]

@ajkeeton, I am facing the same issue with the application.h file missing even after #568. Have you solved it?

[AndKe]

Why is this issue closed ?
I got

/home/andre/Arduino/projects/libraries/FastLED/platforms/arm/stm32/led_sysdefs_arm_stm32.h:4:25: fatal error: application.h: No such file or directory
 #include <application.h>
                         ^
compilation terminated.

with blue pill & FastLED 3.2.6

[painthink]

avr/io.h: No such file or directory

[Hackswell]

You need to pick the proper board. It's probably Generic Black Pill STM32F103 or some such. Make sure you pull the newest FastLED because they included a lot of new stuff in a new release a few days ago.

[AndKe]

Happily, I just updated to 3.4.0 :)
Then I got:

home/andre/Arduino/projects/libraries/FastLED/src/led_sysdefs.h:53:2: error: #error "This platform isn't recognized by FastLED... yet.  See comments in FastLED/led_sysdefs.h for options."
   53 | #error "This platform isn't recognized by FastLED... yet.  See comments in FastLED/led_sysdefs.h for options."

In led_sysdefs.h I see

#elif defined(STM32F10X_MD) || defined(__STM32F1__)

Yet I cannot compile with CoreSTM32's "Generic 32F103C6" "BluePill F103C8" or "BlackPill F103C8"

The Chrismas grinch must have done that :(

[AndKe]

@focalintent - please reopen this issue.

[shlomozippel]

@focalintent - please reopen this issue.

Sadly, he will not be reopening any more issues :(

As a bandaid - try adding || defined(STM32F103xE) or whatever appears in the product_line for the board you're using in CoreSTM32 boards.txt (https://github.com/stm32duino/Arduino_Core_STM32/blob/master/boards.txt)

[kriegsman]

Would it be useful to open a fresh issue for this? Or should we continue it here?

[AndKe]

The bluepills I use have this define: build.product_line=STM32F103xB
So I changed led_sysdefs.h
#elif defined(STM32F10X_MD) || defined(STM32F1)
to
#elif defined(STM32F10X_MD) || defined(STM32F1) || defined(STM32F103xB)

this gave me another error:
FastLED/src/platforms/arm/stm32/led_sysdefs_arm_stm32.h:24:2: error: #error "Platform not supported"
24 | #error "Platform not supported"

so I changed in that file:
#elif defined (STM32F1)
to
#elif defined (STM32F1) || defined(STM32F103xB)

• finally, I changed all references to STM32F1 to also accept STMF103xB like this:

$ grep -inr "__STM32F1__"
src/led_sysdefs.h:27:#elif defined(STM32F10X_MD) || defined(__STM32F1__) || defined(STM32F103xB)
src/platforms/arm/stm32/led_sysdefs_arm_stm32.h:16:#elif defined (__STM32F1__) || defined(STM32F103xB)
src/platforms/arm/stm32/fastpin_arm_stm32.h:63:#elif defined(__STM32F1__)  || defined(STM32F103xB)
src/platforms/arm/stm32/fastpin_arm_stm32.h:127:#if defined(__STM32F1__) || defined(STM32F103xB)
src/platforms/arm/stm32/fastpin_arm_stm32.h:170:#endif // __STM32F1__
src/platforms.h:27:#elif defined(STM32F10X_MD) || defined(__STM32F1__) || defined(STM32F103xB)
andre@loke:~/Arduino/projects/libraries/FastLED$ 

which only gave me this horror-show-error after initially promising almost-compilation:
https://gist.github.com/AndKe/60b7764042407f0b7dcc55986cc916d7