Problems with using printf to print floating point numbers in a single chip microcomputer

fish001

Problems with using printf to print floating point numbers in a single chip microcomputer [Copy link]

For the single-chip microcomputer, the processing power is limited. I use stm32 to directly use the printf function (of course printf uses the serial port method), directly use printf ("xxxx=%f", xxxx), and the printed data is a long string of messy data.

In real-time applications, we usually write our own processing program. The question now is: how to output floating-point numbers to the display device more conveniently and quickly.

According to the method of netizens online, it is a good idea to extract the decimals:

void PrintFloat(float value)
{
int tmp,tmp1,tmp2;
tmp = (int)value;
tmp1=(int)((value-tmp)*10)%10;
tmp2=(int)((value-tmp)*100)%10;
printf("value=%d.%d%d\r\n",tmp,tmp1,tmp2);
}