How to use tri_state_bridge in sopc builder

The problem is that lcd_d_cn and lcd_wen signals are driven both by lcd_0 component and glcd_ pio ports. You can't do this.

If your system must be capable to either, you must provide a method to select one group of signals or the other.

Tristating signals (this doesn't mean using a tristate bridge!) could be a solution: you drive the signal only in the low state and tristate when not active; you then need a resistor to pull up to the high state.

But I think in your case a simple logic port solution is better.

Example:

nios_sys DUT (

...

.out_port_from_the_GLCD_WEN(lcd_wen1),

...

.LCD_RW_from_the_lcd_0(lcd_wen2),

...

)

;

assign lcd_wen = lcd_wen1 & lcd_wen2;

Same for other shared signals.