How to send a floating point number to FPGA from HPS?

I am using Altera DE0 nano SoC FPGA. I want to know how to send a floating point number to FPGA from HPS.

Let a float ex_hps = 6000.9282; sent via Avalon memory mapping interface. If Avalon_write_data address has 32 bits data length (which can be set from Qsys), in FPGA side this number is stored in a 32-bit std_logic_vector right?

Does this std_logic_vector contains the float number as fixed point type (13 downto -14) with original value? or how to put this number back to a fixed point number ex_fpga(13 downto -14) in FPGA side in VHDL?

This is something you could have looked up yourself.

You need to map the float to an integer in C first, using the knowledge about the system.

#include <math.h>

unsigned int PrepareForTransmission(float inputValue)
{
    if (inputValue < 0) return 0; /* underflow error: clip */
    if (inputValue >= powf(2.0f, 14)) return (unsigned int)pow(2.0, 28) - 1; /* overflow error: clip */
    return (unsigned int)(inputValue * pow(2.0, 14) + 0.5); /* +0.5 to round */
}

Then in VHDL you can simply port unsigned std_logic_vector(27 downto 0) to the ufixed(13 downto -14). You (hopefully) know how to do that.