70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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#define EQUAL_ALPHA 50.0f // 等百分比范围比
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#define LOG_ALPHA log(EQUAL_ALPHA)
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static inline float32 logarithmic_conversion(float32 setpoint)
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{
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static const float32 b = 13.24f;
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static const float32 linear_coefficient = 0.123f;
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static const float32 base_log = 0.6931471805599453f; // 直接使用log(2)的预计算值
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float32 res = 0.0f;
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if (setpoint <= 0)
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{
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return 0;
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}
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else if (setpoint >= 100)
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{
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return 100;
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}
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else
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{
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res = b * log(setpoint) / base_log + linear_coefficient * setpoint;
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if (res < 0)
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{
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res = 0.0f;
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}
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else if (res > 100)
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{
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res = 100.0f;
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}
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return res;
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}
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}
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void quick_open(void)
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{
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printf("quick_open:\n");
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for (uint8_t i = 0; i <= 20; i++)
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{
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printf("x = %d, y = %f\n", i * 5, logarithmic_conversion(i * 5));
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}
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printf("\n");
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}
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/**
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* @brief 计算等百分比转换的函数
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*
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* 该函数用于计算等百分比转换的值，并打印结果。
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*
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* @param void 无参数
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* @return void 无返回值
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*/
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void equal_proportion(void)
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{
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uint8_t x = 0; // 指定的x值
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printf("equal_proportion:\n");
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for (uint8_t i = 0; i <= 20; i++)
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{
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x = i * 5;
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printf("x = %d, y = %f\n", x, (exp(x * 0.01f * LOG_ALPHA) - 1) * 100 / (EQUAL_ALPHA - 1));
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}
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printf("\n");
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}
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int main()
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{
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equal_proportion();
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quick_open();
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}
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