168 lines
2.9 KiB
C
168 lines
2.9 KiB
C
/**
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******************************************************************************
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* @file user_lib.c
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* @author Wang Hongxi
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* @author modified by neozng
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* @version 0.2 beta
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* @date 2021/2/18
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* @brief
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******************************************************************************
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* @attention
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*
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******************************************************************************
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*/
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#include "stdlib.h"
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#include "string.h"
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#include "user_lib.h"
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#include "math.h"
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#include "main.h"
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#ifdef _CMSIS_OS_H
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#define user_malloc pvPortMalloc
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#else
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#define user_malloc malloc
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#endif
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uint8_t GlobalDebugMode = 7;
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// 快速开方
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float Sqrt(float x)
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{
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float y;
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float delta;
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float maxError;
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if (x <= 0)
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{
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return 0;
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}
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// initial guess
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y = x / 2;
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// refine
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maxError = x * 0.001f;
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do
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{
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delta = (y * y) - x;
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y -= delta / (2 * y);
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} while (delta > maxError || delta < -maxError);
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return y;
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}
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// 绝对值限制
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float abs_limit(float num, float Limit)
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{
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if (num > Limit)
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{
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num = Limit;
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}
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else if (num < -Limit)
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{
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num = -Limit;
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}
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return num;
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}
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// 判断符号位
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float sign(float value)
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{
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if (value >= 0.0f)
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{
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return 1.0f;
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}
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else
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{
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return -1.0f;
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}
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}
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// 浮点死区
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float float_deadband(float Value, float minValue, float maxValue)
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{
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if (Value < maxValue && Value > minValue)
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{
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Value = 0.0f;
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}
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return Value;
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}
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// int26死区
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int16_t int16_deadline(int16_t Value, int16_t minValue, int16_t maxValue)
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{
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if (Value < maxValue && Value > minValue)
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{
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Value = 0;
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}
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return Value;
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}
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// 限幅函数
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float float_constrain(float Value, float minValue, float maxValue)
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{
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if (Value < minValue)
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return minValue;
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else if (Value > maxValue)
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return maxValue;
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else
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return Value;
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}
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// 限幅函数
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int16_t int16_constrain(int16_t Value, int16_t minValue, int16_t maxValue)
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{
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if (Value < minValue)
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return minValue;
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else if (Value > maxValue)
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return maxValue;
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else
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return Value;
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}
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// 循环限幅函数
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float loop_float_constrain(float Input, float minValue, float maxValue)
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{
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if (maxValue < minValue)
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{
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return Input;
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}
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if (Input > maxValue)
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{
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float len = maxValue - minValue;
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while (Input > maxValue)
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{
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Input -= len;
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}
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}
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else if (Input < minValue)
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{
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float len = maxValue - minValue;
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while (Input < minValue)
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{
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Input += len;
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}
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}
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return Input;
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}
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// 弧度格式化为-PI~PI
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// 角度格式化为-180~180
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float theta_format(float Ang)
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{
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return loop_float_constrain(Ang, -180.0f, 180.0f);
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}
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int float_rounding(float raw)
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{
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static int integer;
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static float decimal;
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integer = (int)raw;
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decimal = raw - integer;
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if (decimal > 0.5f)
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integer++;
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return integer;
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} |