Sending serial data

Hi all

I wanna write a ASCII character to output IO_B1 at pin_n24 (attached), this pin is connect to one of the expansion header which attach to breadboard.
I use IOWR_ALTERA_AVALON_PIO_DATA(DATAOUT_BASE, 0x47);
i wanna see this signal out in the oscillator as arbitrary code, but the signal out was just stay at 3.3v high level no change
is there any other C code to output data?
Please help me

Doesn't look like C code to me. Looks like an Altera FPGA schematic in Quartus II. How are we supposed to know what is inside the box, my friend?