Include errors with ATTINY3227

[Optoneer]

Hi,

I am facing an issue with setting up a project using an attiny3227. I am using an attiny1626 in another project, what works perfectly.

What I have done:

• I downloaded the board information from your repo and put it to the boards folder in .platformio
• I used the platformio wizard in vscode to create a new project using the attiny3227 at a non-default location
• I edit the platformio.ini to my needs (see below)
• vscode already shows an include error of the main.cpp, but I hit "build". It finds the Arduino.h file, but this cannot include avr/pgmspace.h, avr/io.h, avr/interrupt.h files
• I compared the auto-generated cpp-files in .vscode folder with that from the attiny1626 project. It differs in the project names, in the tx-variants (txy6/txy7) and the mcu declaration, so nothing unexpected
• I checked the board files, but cannot see any issue

[env:ATtiny3227]
platform = atmelmegaavr
# board = ATtiny1626
board = ATtiny3227
framework = arduino

board_build.f_cpu = 20000000L
board_build.mcu = attiny3227
board_hardware.oscillator = internal ; internal or external
board_build.extra_flags = 
    -D $BOARD_MCU
    -D MILLIS_USE_TIMERA0

Could someone point me to the right direction? If you need further information, please do not hesitate to ask, I am happy to provide them as good as I can.

Best wishes, Marius

[Optoneer]

Today I see after opening the project, that it is unable to resolve the configuration for avr-gcc.exe and it would use a MinGW-gcc.exe. This does not pop up when opening the attiny1626 project.

What I continued to try - without success:

• I removed the .platformio folder in order to get a fresh installation.
• I checked, that the latest DFP is in .platformio\packages\toolchain-atmelavr\avr\include\avr\iotn3227.h
• I changed the target to 3217 in the platformio.ini and this compiles just fine

Any ideas?

[Optoneer]

Got it. Platformio does not include the necessary include files. If anyone faces this issue, too:

1. Download DFP (Device Family Pack) from Atmel Homepage (Rename to *.zip and extract somewhere)
2. Ensure that \\.platformio\packages\toolchain-atmelavr\avr\include\avr\io.h contains the #include for the correct header file.

   #elif defined (__AVR_ATtiny3227__)
   #  include <avr/iotn3227.h>

3. header file
   • Copy \\include\avr\iotn3227.h to
   • \\.platformio\packages\toolchain-atmelavr\avr\include\avr\iotn3227.h
4. archive file .a and startup file crt.o
   • Copy \\gcc\dev\attiny3227\avrxmega3\libattiny3227.a and crtattiny3227.o to
   • \\.platformio\packages\toolchain-atmelavr\avr\lib\
5. specs file
   • Copy \\gcc\dev\attiny3227\device-specs\specs-attiny3227 to
   • \\.platformio\packages\toolchain-atmelavr\lib\gcc\avr\7.3.0\device-specs\

It starts to compile, but I get a compile error. I think, it is because it is not well tested and the vendor Microchip has not yet completely updated their include files, i.e. using the same names everywhere ...

My issue was with the CLK-Sel. I changed the device header file \\.platformio\packages\toolchain-atmelavr\avr\include\avr\iotn3227.h like this:

/* Clock Select */
typedef enum TCB_CLKSEL_enum
{
    TCB_CLKSEL_DIV1_gc = (0x00<<1),  /* CLK_PER */
    TCB_CLKSEL_DIV2_gc = (0x01<<1),  /* CLK_PER/2 */
    TCB_CLKSEL_TCA0_gc = (0x02<<1),  /* Use CLK_TCA from TCA0 */
    TCB_CLKSEL_EVENT_gc = (0x07<<1)  /* Count on event edge */
} TCB_CLKSEL_t;

changed to

/* Clock Select */
typedef enum TCB_CLKSEL_enum
{
    TCB_CLKSEL_CLKDIV1_gc = (0x00<<1),  /* CLK_PER */
    TCB_CLKSEL_CLKDIV2_gc = (0x01<<1),  /* CLK_PER/2 */
    TCB_CLKSEL_CLKTCA0_gc = (0x02<<1),  /* Use CLK_TCA from TCA0 */
    TCB_CLKSEL_EVENT_gc = (0x07<<1)  /* Count on event edge */
} TCB_CLKSEL_t;

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