Getting the IEEE Single-precision bits for a float

Question

I need to write an IEEE single-precision floating point number to a 32-bit hardware register at a particular address. To do that, I need to convert a variable of type float

Answer 1

You could creat a union type that contains a float and an unsigned int, store a value into the float member, then read it out of the int, like so:

union reg_val
{
  float f_val;
  unsigned int i_val;
} myRegister;
myRegister.f_val = 2.39;
printf("target = %08X", myRegister.i_val);