sprintf函数太大,在STM8上面根本不敢用,动不动就.text overflow。为了将采集的数值通过串口上传到计算机,只能自己写了一个浮点数转换成字符串的函数:
#include
#include
static char table[]={'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
void num2char(char *str, double number, uint8_t g, uint8_t l)
{
uint8_t i;
int temp = number/1;
double t2 = 0.0;
for (i = 1; i<=g; i++)
{
if (temp==0)
str[g-i] = table[0];
else
str[g-i] = table[temp%10];
temp = temp/10;
}
*(str+g) = '.';
temp = 0;
t2 = number;
for(i=1; i<=l; i++)
{
temp = t2*10;
str[g+i] = table[temp%10];
t2 = t2*10;
}
*(str+g+l+1) = '
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