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[update] 增加STM32智慧宿舍基础代码
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196
firmware/stm32/smart_dormitory/User/dht11/dht11.c
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196
firmware/stm32/smart_dormitory/User/dht11/dht11.c
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/****************************************Copyright (c)****************************************************
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**
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** File name: humi.c
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** Created by: XiaoYi
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** Created date: 2020-10-16
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** Version: v1.0
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** Descriptions: The original
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** Link address: https://blog.csdn.net/weixin_45006076
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**
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*********************************************************************************************************/
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#include "dht11.h"
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/* ˽<><CBBD><EFBFBD><EFBFBD><EFBFBD>Ͷ<EFBFBD><CDB6><EFBFBD> --------------------------------------------------------------*/
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/* ˽<>к궨<D0BA><EAB6A8> ----------------------------------------------------------------*/
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/* ˽<>б<EFBFBD><D0B1><EFBFBD> ------------------------------------------------------------------*/
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/* <20><>չ<EFBFBD><D5B9><EFBFBD><EFBFBD> ------------------------------------------------------------------*/
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/* ˽<>к<EFBFBD><D0BA><EFBFBD>ԭ<EFBFBD><D4AD> --------------------------------------------------------------*/
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static void DHT11_Mode_IPU(void);
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static void DHT11_Mode_Out_PP(void);
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static uint8_t dht11_readByte(void);
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/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> --------------------------------------------------------------------*/
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/**
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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* <20><> <20><> ֵ: <20><>
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* ˵ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*/
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static void dht11_delay(uint16_t time)
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{
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uint8_t i;
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while(time)
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{
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for (i = 0; i < 10; i++)
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{
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}
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time--;
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}
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}
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/**
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: DHT11 <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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* <20><> <20><> ֵ: <20><>
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* ˵ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*/
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void dht11_init ( void )
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{
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DHT11_Dout_GPIO_CLK_ENABLE();
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DHT11_Mode_Out_PP();
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DHT11_Dout_HIGH(); // <20><><EFBFBD><EFBFBD>GPIO
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}
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/**
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: ʹDHT11-DATA<54><41><EFBFBD>ű<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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* <20><> <20><> ֵ: <20><>
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* ˵ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*/
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static void DHT11_Mode_IPU(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>蹦<EFBFBD><E8B9A6>GPIO<49><4F><EFBFBD><EFBFBD> */
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GPIO_InitStruct.Pin = DHT11_Dout_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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HAL_GPIO_Init(DHT11_Dout_PORT, &GPIO_InitStruct);
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}
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/**
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: ʹDHT11-DATA<54><41><EFBFBD>ű<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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* <20><> <20><> ֵ: <20><>
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* ˵ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*/
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static void DHT11_Mode_Out_PP(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>蹦<EFBFBD><E8B9A6>GPIO<49><4F><EFBFBD><EFBFBD> */
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GPIO_InitStruct.Pin = DHT11_Dout_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(DHT11_Dout_PORT, &GPIO_InitStruct);
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}
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/**
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>DHT11<31><31>ȡһ<C8A1><D2BB><EFBFBD>ֽڣ<D6BD>MSB<53><42><EFBFBD><EFBFBD>
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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* <20><> <20><> ֵ: <20><>
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* ˵ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*/
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static uint8_t dht11_readByte ( void )
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{
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uint8_t i, temp=0;
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for(i=0;i<8;i++)
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{
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/*ÿbit<69><74>50us<75>͵<EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD>ÿ<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>ѯֱ<D1AF><D6B1><EFBFBD>ӻ<EFBFBD><D3BB><EFBFBD><EFBFBD><EFBFBD> <20><>50us <20>͵<EFBFBD>ƽ <20><><EFBFBD><EFBFBD>*/
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while(DHT11_Data_IN()==GPIO_PIN_RESET);
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/*DHT11 <20><>26~28us<75>ĸߵ<C4B8>ƽ<EFBFBD><C6BD>ʾ<EFBFBD><CABE>0<EFBFBD><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD>70us<75>ߵ<EFBFBD>ƽ<EFBFBD><C6BD>ʾ<EFBFBD><CABE>1<EFBFBD><31><EFBFBD><EFBFBD>
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*ͨ<><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD> x us<75><73><EFBFBD>ĵ<EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״ <20><>x <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ
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*/
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dht11_delay(40); //<2F><>ʱx us <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>0<EFBFBD><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>伴<EFBFBD><E4BCB4>
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if(DHT11_Data_IN()==GPIO_PIN_SET)/* x us<75><73><EFBFBD><EFBFBD>Ϊ<EFBFBD>ߵ<EFBFBD>ƽ<EFBFBD><C6BD>ʾ<EFBFBD><CABE><EFBFBD>ݡ<EFBFBD>1<EFBFBD><31> */
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{
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/* <20>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD>ĸߵ<C4B8>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD> */
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while(DHT11_Data_IN()==GPIO_PIN_SET);
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temp|=(uint8_t)(0x01<<(7-i)); //<2F>ѵ<EFBFBD>7-iλ<69><CEBB>1<EFBFBD><31>MSB<53><42><EFBFBD><EFBFBD>
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}
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else // x us<75><73>Ϊ<EFBFBD>͵<EFBFBD>ƽ<EFBFBD><C6BD>ʾ<EFBFBD><CABE><EFBFBD>ݡ<EFBFBD>0<EFBFBD><30>
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{
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temp&=(uint8_t)~(0x01<<(7-i)); //<2F>ѵ<EFBFBD>7-iλ<69><CEBB>0<EFBFBD><30>MSB<53><42><EFBFBD><EFBFBD>
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}
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}
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return temp;
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}
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/**
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: һ<><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD><DDB4><EFBFBD>Ϊ40bit<69><74><EFBFBD><EFBFBD>λ<EFBFBD>ȳ<EFBFBD>
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: DHT11_Data:DHT11<31><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* <20><> <20><> ֵ: ERROR<4F><52> <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
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* SUCCESS<53><53><EFBFBD><EFBFBD>ȡ<EFBFBD>ɹ<EFBFBD>
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* ˵ <20><><EFBFBD><EFBFBD>8bit ʪ<><CAAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD> + 8bit ʪ<><CAAA>С<EFBFBD><D0A1> + 8bit <20>¶<EFBFBD><C2B6><EFBFBD><EFBFBD><EFBFBD> + 8bit <20>¶<EFBFBD>С<EFBFBD><D0A1> + 8bit У<><D0A3><EFBFBD><EFBFBD>
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*/
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uint8_t dht11_get_tempHumi(DHT11_Data_TypeDef *DHT11_Data)
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{
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uint8_t temp;
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uint16_t humi_temp;
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/*<2A><><EFBFBD><EFBFBD>ģʽ*/
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DHT11_Mode_Out_PP();
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/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
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DHT11_Dout_LOW();
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/*<2A><>ʱ18ms*/
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delay_ms(18);
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/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ30us*/
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DHT11_Dout_HIGH();
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dht11_delay(30); //<2F><>ʱ30us
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/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD> <20>жϴӻ<CFB4><D3BB><EFBFBD>Ӧ<EFBFBD>ź<EFBFBD>*/
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DHT11_Mode_IPU();
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/*<2A>жϴӻ<CFB4><D3BB>Ƿ<EFBFBD><C7B7>е͵<D0B5>ƽ<EFBFBD><C6BD>Ӧ<EFBFBD>ź<EFBFBD> <20>粻<EFBFBD><E7B2BB>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
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if(DHT11_Data_IN()==GPIO_PIN_RESET)
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{
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/*<2A><>ѯֱ<D1AF><D6B1><EFBFBD>ӻ<EFBFBD><D3BB><EFBFBD><EFBFBD><EFBFBD> <20><>80us <20>͵<EFBFBD>ƽ <20><>Ӧ<EFBFBD>źŽ<C5BA><C5BD><EFBFBD>*/
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while(DHT11_Data_IN()==GPIO_PIN_RESET);
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/*<2A><>ѯֱ<D1AF><D6B1><EFBFBD>ӻ<EFBFBD><D3BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 80us <20>ߵ<EFBFBD>ƽ <20><><EFBFBD><EFBFBD><EFBFBD>źŽ<C5BA><C5BD><EFBFBD>*/
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while(DHT11_Data_IN()==GPIO_PIN_SET);
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/*<2A><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
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DHT11_Data->humi_high8bit= dht11_readByte();
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DHT11_Data->humi_low8bit = dht11_readByte();
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DHT11_Data->temp_high8bit= dht11_readByte();
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DHT11_Data->temp_low8bit = dht11_readByte();
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DHT11_Data->check_sum = dht11_readByte();
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/*<2A><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ÿ<EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>ģʽ*/
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DHT11_Mode_Out_PP();
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/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/
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DHT11_Dout_HIGH();
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/* <20><><EFBFBD><EFBFBD><EFBFBD>ݽ<EFBFBD><DDBD>д<EFBFBD><D0B4><EFBFBD> */
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humi_temp=DHT11_Data->humi_high8bit*100+DHT11_Data->humi_low8bit;
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DHT11_Data->humidity =(float)humi_temp/100;
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humi_temp=DHT11_Data->temp_high8bit*100+DHT11_Data->temp_low8bit;
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DHT11_Data->temperature=(float)humi_temp/100;
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/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD>ȷ*/
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temp = DHT11_Data->humi_high8bit + DHT11_Data->humi_low8bit +
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DHT11_Data->temp_high8bit+ DHT11_Data->temp_low8bit;
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if(DHT11_Data->check_sum==temp)
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{
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return SUCCESS;
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}
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else
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return ERROR;
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}else
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return ERROR;
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}
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