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 Write_AM2301_PIN_Init();

 RESET_AM2301_PIN();

 HAL_Delay(2);

 SET_AM2301_PIN();

 rt_hw_us_delay(30);

 Read_AM2301_PIN_Init(); Sensor_AnswerFlag=0;

 if(Read_AM2301_PIN()==GPIO_PIN_RESET) { Sensor_AnswerFlag=1; Sys_CNT=0;

 while(Read_AM2301_PIN()==GPIO_PIN_RESET) { if(++Sys_CNT>3000) { Sensor_ErrorFlag=1; return 0; } } Sys_CNT=0;

 while(Read_AM2301_PIN()==GPIO_PIN_SET) { if(++Sys_CNT>3000) { Sensor_ErrorFlag=1; return 0; } }

 for(i=0;i<5;i++) { AM2301_Data<i> = Read_AM2301_Data();</i><i> }</i>

unsigned char Read_AM2301_Data(void){ unsigned char i,cnt,buffer,tmp;//要读取8次 for (i = 0; i < 8; i++) { cnt=0;//判断低电平是否结束 while(!Read_AM2301_PIN()) { if(++cnt>=3000) break; }//低电平结束后，进入高电平，开始计时30us rt_hw_us_delay(30); tmp=0;//如果此时还是高电平，那么肯定是大于28us,确定是1来了，赋值1 if(Read_AM2301_PIN()) tmp=1; cnt=0;//等待高电平结束，号进入下一位的读取 while(Read_AM2301_PIN()) { if(++cnt>=2000) break; }//移位写入刚刚得到的1个BIT buffer<<=1; buffer|=tmp; } return buffer;}

unsigned char Read_AM2301_PIN(void){ return HAL_GPIO_ReadPin(AM2301_PORT, AM2301_PIN);}
void SET_AM2301_PIN(void){ HAL_GPIO_WritePin(AM2301_PORT, AM2301_PIN,GPIO_PIN_SET);}
void RESET_AM2301_PIN(void){ HAL_GPIO_WritePin(AM2301_PORT, AM2301_PIN,GPIO_PIN_RESET);}

#include "stm32f0xx_hal.h"
//读传感器 端口位定义，可修改//*#define AM2301_PIN GPIO_PIN_10#define AM2301_PORT GPIOA#define AM2301_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()#define AM2301_GPIO_CLK_DISABLE() __HAL_RCC_GPIOA_CLK_DISABLE()

unsigned char Sensor_AnswerFlag; //收到起始标志位unsigned char Sensor_ErrorFlag; //读取传感器错误标志unsigned int Sys_CNT;unsigned char AM2301_Data[5]={0x00,0x00,0x00,0x00,0x00};
void Read_AM2301_PIN_Init(void){ AM2301_GPIO_CLK_ENABLE(); GPIO_InitTypeDef GPIO_InitStruct; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; GPIO_InitStruct.Pin = AM2301_PIN; HAL_GPIO_Init(AM2301_PORT, &GPIO_InitStruct);}
void Write_AM2301_PIN_Init(void){ AM2301_GPIO_CLK_ENABLE(); GPIO_InitTypeDef GPIO_InitStruct; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; GPIO_InitStruct.Pin = AM2301_PIN; HAL_GPIO_Init(AM2301_PORT, &GPIO_InitStruct);}
unsigned char Read_AM2301_PIN(void){ return HAL_GPIO_ReadPin(AM2301_PORT, AM2301_PIN);}
void SET_AM2301_PIN(void){ HAL_GPIO_WritePin(AM2301_PORT, AM2301_PIN,GPIO_PIN_SET);}
void RESET_AM2301_PIN(void){ HAL_GPIO_WritePin(AM2301_PORT, AM2301_PIN,GPIO_PIN_RESET);}
unsigned char Read_AM2301_Data(void){ unsigned char i,cnt,buffer,tmp; for (i = 0; i < 8; i++) { cnt=0; while(!Read_AM2301_PIN()) { if(++cnt>=3000) break; } rt_hw_us_delay(30); tmp=0; if(Read_AM2301_PIN()) tmp=1; cnt=0; while(Read_AM2301_PIN()) { if(++cnt>=2000) break; } buffer<<=1; buffer|=tmp; } return buffer;}
unsigned char Read_Sensor(void){ unsigned char i; Write_AM2301_PIN_Init(); RESET_AM2301_PIN();// rt_thread_mdelay(2); HAL_Delay(2); SET_AM2301_PIN(); rt_hw_us_delay(30); SET_AM2301_PIN();
 Read_AM2301_PIN_Init(); Sensor_AnswerFlag=0; if(Read_AM2301_PIN()==GPIO_PIN_RESET) { Sensor_AnswerFlag=1; Sys_CNT=0; while(Read_AM2301_PIN()==GPIO_PIN_RESET) { if(++Sys_CNT>3000) { Sensor_ErrorFlag=1; return 0; } } Sys_CNT=0; while(Read_AM2301_PIN()==GPIO_PIN_SET) { if(++Sys_CNT>3000) { Sensor_ErrorFlag=1; return 0; } } for(i=0;i<5;i++) { AM2301_Data[i] = Read_AM2301_Data(); } } else { Sensor_AnswerFlag=0; } return 1;}