[BUG] STM32F103RET6 and I2C2

[ASTuser1]

Bug Description

Since i´m unable to register on reprap.org, i unfortunaly have to write down here my issue. On my Creality- CR-100 (not 10) i was trying to run an 16*2 HD44780, attached to an PCF8574 I/O-Extender, on I2C2 (PB10/11) of an original STM32F103RET6 by #define LCM1602 in configuration.h, but with no luck -there is no activity on PB10/11 on my logic analyzer. I2C1 cannot be used, its Pins are connected by default to the stepper drivers (PB8 to X-Axis DIR, PB9 to Y-Axis-STEP).

I use Marlin 2.1.2, VSCode & PlatformIO (both installed around one week ago), Marlin Autobuild, Board Creality_V422, Pins stm32F1/Pins_Creality_V422.h (adjusted to my board), Build for Environment STM32F103RE_creality (512k)

I was also trying to make adjustments in peripheralPins.c of Generic_F103Rx (edit 01/05/23: and Marlin_F103Rx), Section I2C, leaving only PinMap_I2C_SDA attached to PB11 and PinMap_I2C_SCL to PB10.

Originally it says there (sorry, my mistake, at first i had posted a modified Version of mine) :

`

ifdef HAL_I2C_MODULE_ENABLED

WEAK const PinMap PinMap_I2C_SDA[] = { {PB_7, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)}, {PB_9, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_I2C1_ENABLE)},

if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)

{PB_11, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)},

endif

{NC, NP, 0} };

endif

ifdef HAL_I2C_MODULE_ENABLED

WEAK const PinMap PinMap_I2C_SCL[] = { {PB_6, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)}, {PB_8, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_I2C1_ENABLE)},

if defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)

{PB_10, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, AFIO_NONE)},

endif

{NC, NP, 0} };

endif

`

What i also miss is a "AFIO_I2C2_ENABLE" or something in that direction.

BTW: In MarlinF103Rx\variant.h , Line 93, PB11 is assigned to LED-Builtin by default. `

ifndef LED_BUILTIN

define LED_BUILTIN PB11

endif

`

HAL-I2C-Module seems to be enabled, because if i write some pointless stuff inside #ifdef HAL_I2C_MODULE_ENABLED as shown above, compiling will stop.

Definitions in configuration.h /configuration_adv are as follows:

define DISPLAY_CHARSET_HD44780 JAPANESE

define LCD_INFO_SCREEN_STYLE 0

define SLIM_LCD_MENUS

define LCM1602 (or LCD_SAINSMART_I2C_1602, seems to be the same)

From factory this Board had an small 0,96-OLED Display with an SSD1306-Controller attached to I2C2 and was already running Marlin, but i have no clue which version. Defining U8GLIB_SSD1306 instead of LCM1602 in order to get at least the original Dispaly working doesn´t work either, no I2C-Activity.

Creality hasn´t / won´t give out the Sources (we know they actually have to; the Fimware Creator is called "BiSun"); i only have the already compiled original .bin-File available.

The Board is a very stripped down Version and "somehow" related to the Creality V422-Board, uses 4*A4988 Steppers, has the usual connectors, provides a CH340 für USB Communiction/Programming, has a SD Slot, but is missing components and connectors for a headbed, Fan-PWM-Control, has no external I2C-EEPROM and uses a different Pin for the Nozzle-Thermistor. It also uses PB14/13/12 for three control buttons and no rotary encoder.

IdK if this is a Bug or simply lack of my knowledge. I´m an long term Assembly-programmer (from 8 Bit up to Cortex), not a C++-Programmer, but i cannot debug the ELF-Debug-File down to the problem, since i don´t have a Hardware debugger for STM32 (i have only a simple CortexM3-Debugger in Software) and the output is too entangled for tracing.

BTW: Compiling with Serial Port set on 115200 doesn´t let me connect to the board, 250KBaud just works fine.

Best regards & thank you!

Bug Timeline

No response

Expected behavior

Having output on Display

Actual behavior

nothing

Steps to Reproduce

No response

Version of Marlin Firmware

2.1.2

Printer model

Creality CR-100

Electronics

Stock

Add-ons

No response

Bed Leveling

None

Your Slicer

None

Host Software

None

Don't forget to include

• [X] A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

Marlin.zip

[ASTuser1]

BTW: #define U8GLIB_SSD1306

results in: "Marlin\src\inc\Warnings.cpp:67:4: warning: #warning "Your Configuration provides no method to acquire user feedback!" [-Wcpp]"

Where idK if this caused by a missing input definition - Rotary encoder or in my case, simple buttons, which are not defined yet, because idk where to look at - or a hint that output cannot be shown to a display, Could be issued by both, as i read somewhere else.

define SAV_3DGLCD

results in no connection to the board via Serial (i suppose it hangs).

[ASTuser1]

Just curious - i´ve redefinded u8glib_SSD1306 in configuration.h - according to STM32CubeIDE, loaded firmware-ELF - in this dropdown list (sorry for the quality) i cannot see any file that is called "u8glib" or "wire" - does that automatically mean that these librarys are not included at all at buildtime? If so, what could be the cause?

[github-actions[bot]]

This issue has had no activity in the last 60 days. Please add a reply if you want to keep this issue active, otherwise it will be automatically closed within 10 days.

[github-actions[bot]]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.