Using stm32f4 read DHT- 21 digital temperature and humidity sensor experiment

DHT21\keilkilll.bat
.....\readme.txt
.....\USER\DHT11.uvguix.Administrator
.....\....\DHT11.uvoptx
.....\....\DHT11.uvprojx
.....\....\JLinkSettings.ini
.....\....\main.c
.....\....\stm32f4xx.h
.....\....\stm32f4xx_conf.h
.....\....\stm32f4xx_it.c
.....\....\stm32f4xx_it.h
.....\....\system_stm32f4xx.c
.....\....\system_stm32f4xx.h
.....\SYSTEM\usart\usart.c
.....\......\.....\usart.h
.....\......\sys\sys.c
.....\......\...\sys.h
.....\......\delay\delay.c
.....\......\.....\delay.h
.....\OBJ\delay.crf
.....\...\delay.d
.....\...\delay.o
.....\...\DHT11.axf
.....\...\DHT11.build_log.htm
.....\...\dht11.crf
.....\...\dht11.d
.....\...\DHT11.hex
.....\...\DHT11.htm
.....\...\DHT11.lnp
.....\...\DHT11.map
.....\...\dht11.o
.....\...\DHT11.sct
.....\...\DHT11_DHT11.dep
.....\...\lcd.crf
.....\...\lcd.d
.....\...\lcd.o
.....\...\led.crf
.....\...\led.d
.....\...\led.o
.....\...\main.crf
.....\...\main.d
.....\...\main.o
.....\...\misc.crf
.....\...\misc.d
.....\...\misc.o
.....\...\startup_stm32f40_41xxx.d
.....\...\startup_stm32f40_41xxx.lst
.....\...\startup_stm32f40_41xxx.o
.....\...\stm32f4xx_fsmc.crf
.....\...\stm32f4xx_fsmc.d
.....\...\stm32f4xx_fsmc.o
.....\...\stm32f4xx_gpio.crf
.....\...\stm32f4xx_gpio.d
.....\...\stm32f4xx_gpio.o
.....\...\stm32f4xx_it.crf
.....\...\stm32f4xx_it.d
.....\...\stm32f4xx_it.o
.....\...\stm32f4xx_rcc.crf
.....\...\stm32f4xx_rcc.d
.....\...\stm32f4xx_rcc.o
.....\...\stm32f4xx_syscfg.crf
.....\...\stm32f4xx_syscfg.d
.....\...\stm32f4xx_syscfg.o
.....\...\stm32f4xx_usart.crf
.....\...\stm32f4xx_usart.d
.....\...\stm32f4xx_usart.o
.....\...\sys.crf
.....\...\sys.d
.....\...\sys.o
.....\...\system_stm32f4xx.crf
.....\...\system_stm32f4xx.d
.....\...\system_stm32f4xx.o
.....\...\usart.crf
.....\...\usart.d
.....\...\usart.o
.....\HARDWARE\LED\led.c
.....\........\...\led.h
.....\........\.CD\FONT.H
.....\........\...\lcd.c
.....\........\...\lcd.h
.....\........\DHT11\dht11.c
.....\........\.....\dht11.h
.....\FWLIB\src\misc.c
.....\.....\...\stm32f4xx_adc.c
.....\.....\...\stm32f4xx_can.c
.....\.....\...\stm32f4xx_crc.c
.....\.....\...\stm32f4xx_cryp.c
.....\.....\...\stm32f4xx_cryp_aes.c
.....\.....\...\stm32f4xx_cryp_des.c
.....\.....\...\stm32f4xx_cryp_tdes.c
.....\.....\...\stm32f4xx_dac.c
.....\.....\...\stm32f4xx_dbgmcu.c
.....\.....\...\stm32f4xx_dcmi.c
.....\.....\...\stm32f4xx_dma.c
.....\.....\...\stm32f4xx_dma2d.c
.....\.....\...\stm32f4xx_exti.c
.....\.....\...\stm32f4xx_flash.c
.....\.....\...\stm32f4xx_flash_ramfunc.c
.....\.....\...\stm32f4xx_fmc.c
.....\.....\...\stm32f4xx_fsmc.c

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