stm32 #include "GrayConversion.h"
typedef enum { false = 0, true = !false }ubool; /**
- 二进制转换成格雷码
- @param lStart lValue所在区间下界
- @param lEnd lValue所在区间上界
- @param lValue 要转换的二进制数的实值
- @return 返回格雷码对应的二进制数的实值
- @see g2b() g2b 格雷码转换二进制
- @useage a=b2g(0,15,4); //取得4所对应格雷码的二进制值 结果a等于6
- @memo lValue的值必须在区间[lStart,lEnd]里,否则无法求得所求结果.相应地,如果区间越小,求得结
-
果所用的时间就越少.而且lStart,lEnd的值必须为2的N次方减1. 通常lStart为0.
*/ unsigned int b2g(unsigned int lStart,unsigned int lEnd,unsigned int lValue) { unsigned int Start=lStart,End=lEnd,Temp=0,Counter=0; ubool Type = true;
while(Start<End){
Temp=(End+Start-1)>>1;
if(lValue<=Temp){
if(!Type)
Counter+=((End-Start+1)>>1);
End=Temp;
Type=true;
}
else{
if(Type)
Counter+=((End-Start+1)>>1);
Start=++Temp;
Type=false;
}
}
return Counter;
} /**
- 格雷码转换成二进制
- @param lStart lValue对应二进制数所在区间下界
- @param lEnd lValue对应二进制数所在区间上界
- @param lValue 要转换的格雷码的实值
- @return 返回二进制数对应的格雷码的实值
- @see b2g() b2g 二进制转换格雷码
- @useage a=b2g(0,15,6);//取得6所对应二进制值的格雷码 结果a等于4
- @memo lValue对应二进制数的值必须在区间[lStart,lEnd]里,否则无法求得所求结果.相应地,如果区
-
间越小,求得结果所用的时间就越少.而且lStart,lEnd的值必须为2的N次方减1. 通常lStart为0.
*/ unsigned int g2b(unsigned int lStart,unsigned int lEnd,unsigned int lValue) { unsigned int Start=lStart,End=lEnd,Counter=0,Temp=0; ubool Type=true;
while(Start<End){
Temp=Counter+((End-Start+1)>>1);
if(Type^(lValue<Temp)){
if(Type)
Counter=Temp;
Start=(Start+End+1)>>1;
Type=false;
}
else{
if(!Type)
Counter=Temp;
End=(Start+End-1)>>1;
Type=true;
}
}
return Start;
}
/**
- @file Templates/Src/stm32f4xx_it.c
- @author MCD Application Team
- @version V1.2.1
- @date 13-March-2015
- @brief Main Interrupt Service Routines.
-
This file provides template for all exceptions handler and -
peripherals interrupt service routine.
- @attention
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
-
- Redistributions of source code must retain the above copyright notice,
-
this list of conditions and the following disclaimer. -
- Redistributions in binary form must reproduce the above copyright notice,
-
this list of conditions and the following disclaimer in the documentation -
and/or other materials provided with the distribution. -
- Neither the name of STMicroelectronics nor the names of its contributors
-
may be used to endorse or promote products derived from this software -
without specific prior written permission. - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* Includes ------------------------------------------------------------------*/ #include "main.h" #include "stm32f4xx_it.h"
/** @addtogroup STM32F4xx_HAL_Examples
- @{ */
/** @addtogroup Templates
- @{ */
/* Private typedef -----------------------------------------------------------/ / Private define ------------------------------------------------------------/ / Private macro -------------------------------------------------------------/ / Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------/ / Private functions ---------------------------------------------------------*/
// / Cortex-M4 Processor Exceptions Handlers / //
/**
- @brief This function handles NMI exception.
- @param None
- @retval None */ void NMI_Handler(void) { }
/**
- @brief This function handles Hard Fault exception.
- @param None
- @retval None / void HardFault_Handler(void) { / Go to infinite loop when Hard Fault exception occurs */ while (1) { } }
/**
- @brief This function handles Memory Manage exception.
- @param None
- @retval None / void MemManage_Handler(void) { / Go to infinite loop when Memory Manage exception occurs */ while (1) { } }
/**
- @brief This function handles Bus Fault exception.
- @param None
- @retval None / void BusFault_Handler(void) { / Go to infinite loop when Bus Fault exception occurs */ while (1) { } }
/**
- @brief This function handles Usage Fault exception.
- @param None
- @retval None / void UsageFault_Handler(void) { / Go to infinite loop when Usage Fault exception occurs */ while (1) { } }
/**
- @brief This function handles SVCall exception.
- @param None
- @retval None */ void SVC_Handler(void) { }
/**
- @brief This function handles Debug Monitor exception.
- @param None
- @retval None */ void DebugMon_Handler(void) { }
/**
- @brief This function handles PendSVC exception.
- @param None
- @retval None */ void PendSV_Handler(void) { }
/**
- @brief This function handles SysTick Handler.
- @param None
- @retval None */ void SysTick_Handler(void) { HAL_IncTick(); }
// / STM32F4xx Peripherals Interrupt Handlers / / Add here the Interrupt Handler for the used peripheral(s) (PPP), for the / / available peripheral interrupt handler's name please refer to the startup / / file (startup_stm32f4xx.s). / //
/**
- @brief This function handles PPP interrupt request.
- @param None
- @retval None */ /void PPP_IRQHandler(void) { }/
/**
- @} */
/**
- @} */
/************************ (C) COPYRIGHT STMicroelectronics *END OF FILE/