DS18B20温度格式转换

#include <stdio.h>
#include <stdint.h>
/* DS18B20温度格式转换 */
uint8_t tempIntPart[3];
uint8_t tempDecPart[4];

float convertToFloat(int16_t temperature) {
    float temp;
    temp = (float)temperature;
    temp /= 16.0f;
    return temp;
}

void splitIntPart(int16_t temperature) {
    uint8_t i;
    if (temperature & 0x8000)
        temperature = -temperature;
    temperature >>= 4;
    for (i = 0; i < 3; i++) {   //逆向存
        tempIntPart[i] = temperature % 10;
        temperature /= 10;
    }
}

void splitDecPart(int16_t temperature) {
    uint8_t decPart;
    if (temperature & 0x8000)
        temperature = -temperature;
    decPart = (uint8_t)(temperature & 0x000F);
    tempDecPart[0] = (decPart * 10) >> 4;
    tempDecPart[1] = ((decPart * 100) >> 4) % 10;
    tempDecPart[2] = ((decPart * 1000) >> 4) % 10;
    tempDecPart[3] = ((decPart * 10000) >> 4) % 10;
}

int main() {
    int16_t temperature = 0x00AB, i;
    printf("%f\n", convertToFloat(temperature));
    splitIntPart(temperature);
    splitDecPart(temperature);
    for (i = 2; i >= 0; i--)
        printf("%hhd", tempIntPart[i]);
    printf("\n");
    for (i = 0; i < 4; i++)
        printf("%hhd", tempDecPart[i]);
    printf("\n");
    return 0;
}