Problem with three 40x2 oled display

[dinama]

I try to connect three 40x2 display to MBHP_CORE_STM32F4 board in a MIDIbox NG controller.

The first two display are connected to  J15A and J15B.

For third display i tried to recompile the MIDIbox NG application with following options in mios32_config.h  for optional third Enable line (pin A6 of J5B):

#define MIOS32_BOARD_LCD_E3_PORT GPIOB      
#define MIOS32_BOARD_LCD_E3_PIN  GPIO_Pin_0

 

every time i get the same error

"

project_build//c/MIOS32/mios32/STM32F4xx/mios32_board.o: In function `MIOS32_BOARD_J15_PortInit':
c:/MIOS32/mios32/STM32F4xx/mios32_board.c:927: undefined reference to `LCD_PIN_E3'
project_build//c/MIOS32/mios32/STM32F4xx/mios32_board.o: In function `MIOS32_BOARD_J15_E_Set':
c:/MIOS32/mios32/STM32F4xx/mios32_board.c:1118: undefined reference to `LCD_PIN_E3'
collect2.exe: error: ld returned 1 exit status
make: *** [project_build/project.elf] Error 1
"make all" terminated with exit code 2. Build might be incomplete.

"

I use Eclipse for compiling.

I didn't understand something. I'm not a coder.

In the CORE_LPC17 Module there was J28 for connecting other displays but not on MBHP_CORE_STM32F4 board.

I need some help.

Thanks all for your help and your time.