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温湿度传感器 3.3~5.5V

2023-03-24 14:55

转这个DHT22与DHT11相比不光是体积大了一圈，而且精度也较之有了提升，价格当然也跟上去了。输出的数据同样是40位，前16位是湿度；随后的16位是温度；最后8位是前面32位的校验和。驱动程序都差不多，这次程序也是在DHT11的基础上修改的。程序还存在一些问题，目前只是有输出而已，采集的数据有些问题需要进一步优化。 下面是主要的代码：static void DHT22_Mode_IPU(void)//使DHT22-DATA引脚变为输入模式{GPIO_InitTypeDef GPIO_InitStruct1;GPIO_InitStruct1.GPIO_Pin = GPIO_Pin_1;GPIO_InitStruct1.GPIO_InitState = Bit_SET;GPIO_InitStruct1.GPIO_IRQMode = GPIO_IT_DISABLE;GPIO_InitStruct1.GPIO_Mode = GPIO_Mode_IN_FLOATING;//设置引脚模式为浮空输入模式GPIO_InitStruct1.GPIOx = PTC;GPIO_Init(&GPIO_InitStruct1);}static void DHT22_Mode_OPP(void)//使DHT22-DATA引脚变为输出模式{GPIO_InitTypeDef GPIO_InitStruct1;GPIO_InitStruct1.GPIO_Pin = GPIO_Pin_1;GPIO_InitStruct1.GPIO_InitState = Bit_SET;GPIO_InitStruct1.GPIO_IRQMode = GPIO_IT_DISABLE;GPIO_InitStruct1.GPIO_Mode = GPIO_Mode_OPP;//设置引脚模式为通用推挽输出GPIO_InitStruct1.GPIOx = PTC;GPIO_Init(&GPIO_InitStruct1);}//复位DHT22void DHT22_Rst(void){DHT22_Mode_OPP();//设置为输出模式DHT22_DATA_OUT(0);DelayMs(20);//主机拉低总线保持18mS以上DHT22_DATA_OUT(1);DelayUs(30);//主机拉高总线30us}//等待DHT22的回应//返回1:未检测到DHT11的存在//返回0:存在uint8_t DHT22_Check(void){uint8_t retry=0;DHT22_Mode_IPU();//主机设为输入 while (DHT22_DATA_IN() && retry=100) return 1;else retry=0; while (!DHT22_DATA_IN() && retry=100) return 1;return 0;}//从DHT22读取一个位//返回值：1/0uint8_t DHT22_Read_Bit(void){uint8_t retry=0;while(DHT22_DATA_IN() && retry

2016-09-16 17:33

/* ------------------------------------------ * Copyright (c) 2016, Synopsys, Inc. All rights reserved. * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1) Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * 2) 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. * 3) Neither the name of the Synopsys, Inc., 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. * * \version 2016.01 * \date 2014-12-17 * \author Wayne Ren(Wei.Ren@synopsys.com)--------------------------------------------- *//** * \defgroupEMBARC_APP_GPIOembARC GPIO Example * \ingroupEMBARC_APPS_TOTAL * \ingroupEMBARC_APPS_BOARD_EMSK * \ingroupEMBARC_APPS_BAREMETAL * \briefembARC Example for testing designware gpio module * * \details * ### Extra Required Tools * * ### Extra Required Peripherals * * ### Design Concept *This example is designed to show how to use device [GPIO HAL API](dev_gpio.h) in embARC. * * ### Usage Manual *Test cases for DW GPIO driver. In this example, the functions of the LEDs, buttons, and DIP switches are tested. * * * ### Extra Comments * *//** * \file * \ingroupEMBARC_APP_GPIO * \briefexample of timer0 and gpio *//** * \addtogroupEMBARC_APP_GPIO * @{ */#include "embARC.h"#include "embARC_debug.h"static DEV_GPIO_PTR port_th;static void delay(int32_t z){int32_t i,j;for(i=36;i>0;i--)for(j=z;j>0;j--);}staticvoid pushhigh(){uint32_t data0;port_th = gpio_get_dev(DW_GPIO_PORT_A);port_th->gpio_close();port_th->gpio_open(0xB0000);//PORT A的[17:16]、[19]打开port_th->gpio_write(0x30000,0xB0000);//PORT A的[19:16]写入数据，串口总线拉高port_th->gpio_read(&data0,0xB0000);EMBARC_PRINTF("data0 is 0x%x\r\n",data0);}staticvoid pushlow(){uint32_t data1;port_th = gpio_get_dev(DW_GPIO_PORT_A);port_th->gpio_close();port_th->gpio_open(0xB0000);//PORT A的[17:16]、[19]打开port_th->gpio_write(0x10000,0xB0000);//PORT A的[19:16]写入数据，串口总线拉低port_th->gpio_read(&data1,0xB0000);EMBARC_PRINTF("data1 is 0x%x\r\n",data1);}int main(void){uint32_t humity[16];uint32_t temperature[16];long t;DEV_GPIO_BIT_ISR bit_isr;DEV_GPIO_INT_CFG int_cfg;cpu_lock();board_init(); /* board init */while(1){pushhigh();delay(20000);//SDA拉高2spushlow();delay(8);//SDA拉低800uspushhigh();delay(2);//SDA拉高20uspushlow();delay(8);//SDA拉低80uspushhigh();delay(8);//SDA拉高80uspushlow();delay(3);//SDA拉低50uspushhigh();delay(2);//SDA拉高26usport_th->gpio_read(&humity[0],0x20000);//读PORT A的[17]的数据EMBARC_PRINTF("humity[0] is 0x%x%x\r\n",humity[0]);pushlow();delay(3);//SDA拉低50uspushhigh();delay(7);//SDA拉高70usport_th->gpio_read(&humity[1],0x20000);//读PORT A的[17]的数据EMBARC_PRINTF("humity[1] is 0x%x%x\n",humity[1]);port_th->gpio_read(&humity[2],0x20000);//读PORT A的[17]的数据EMBARC_PRINTF("humity[2] is 0x%x%x\n",humity[2]);port_th->gpio_read(&humity[3],0x20000);//读PORT A的[17]的数据EMBARC_PRINTF("humity[3] is 0x%x%x\n",humity[3]);/*port_th->gpio_read(&humity[1],0x20000);//读PORT A的[17]的数据EMBARC_PRINTF("humity is %x\n",humity);//t= ((long)humity[0] >= 3;//conversion (t = t*0,0625) in Degrees //t *= 6250; //EMBARC_PRINTF("t is %2d.%2d\n",t);*/}cpu_unlock(); /* unlock system */while (1);return E_SYS;}

2016-05-02 16:14

湿度87%温度25摄氏度

2021-11-29 08:27

------------------------------------------------------------------*//************************ AM2302 数据类型定义

2016-07-23 09:14

\bsp_debug_usart.h"#include "lcd\bsp_lcd.h"#include "stdlib.h"#include "AM2302

2016-07-25 09:31