As title, I use 32, because need a fourth-order time curve fitting method, floating point arithmetic can't satisfy the float type, you must use double floating point arithmetic, but I wrote a loosely defined inside a double, even have a type conversion error assignment, show not to come out, to solve

CodePudding user response:

Not clear, a chip is arguably no hardware float computing unit, even inside of a double computing software can also be
Error may be other reasons

CodePudding user response:

Is... With double matrix can't calculate a fourth-order time, to card master, feeling is collapsed

CodePudding user response:

Stm32f4 only single-precision floating-point hardware acceleration, double or integer simulation algorithm, the original poster error because of other factors, basic grammar wrong use, expression is wrong or memory access errors, the compiler Settings such as wrong

CodePudding user response:

Hardware of floating point arithmetic unit may line, can use softfp compiler