#include

#define?uchar?unsigned?char
#define?uint?unsigned?int

void?delay_us（uint?us）;??????//delay
void?delay_ms（uint?ms）;

uchar?dht_read_byte（void）;???//dht11??
void?dht_read_data（void）;

void?lcd1602_init（void）;???//1602_init
void?write_com（uchar?com）;
void?write_dat（uchar?dat）;
void?lcd_busy（void）;
void?show_display（void）;

uchar?Data[5];
uchar?table0[]={“0123456789“};
uchar?table3[]={0x100x060x090x080x090x060x00};//℃
uchar?table1[]=“temp:“;
uchar?table2[]=“humi:“;
uchar?RH_data_hRH_data_ltemp_data_htemp_data_lcheck_data;


void?lcd1602_init（void）????//初始化
{
?DDRC|=0XFF;
?DDRA|=0XE0;
?PORTA&=~（1<?write_com（0x3c）;
?delay_ms（10）;
?write_com（0x06）;
?delay_ms（10）;
?write_com（0x0c）;
?delay_ms（10）;
?write_com（0x01）;
?delay_ms（10）;
?}
?
void?lcd_busy（void）
{
??PORTA&=~（1<??PORTA|=1<??DDRC=0x00;
??PORTA|=1<??while（PINC&0x80）;
??PORTA&=~（1<??DDRC=0xff;
}
?
void?write_com（uchar?com）???//寫命令
{
?lcd_busy（）;
?//delay_ms（10）;?
?PORTA&=~（1<?PORTA&=~（1<?PORTC=com;
?delay_ms（10）;
?PORTA|=1<?//delay_ms（10）;
?PORTA&=~（1<?}
void?write_dat（uchar?dat）??//寫數據
{
?lcd_busy（）;
?//delay_ms（10）;
?PORTA&=~（1<?PORTA|=1<?PORTC=dat;
?delay_ms（10）;
?PORTA|=1<?//delay_ms（10）;
?PORTA&=~（1<}

void?show_display（void）
{
??uchar?i;
??write_com（0x80+0）;
??for（i=0;i<5;i++）
???{
?????write_dat（table1[i]）;
	?delay_us（500）;	?
???}
??write_com（0xc0+0）;
??for（i=0;i<5;i++）?
???{
?????write_dat（table2[i]）;
	?delay_us（500）;
???}	?
}


uchar?dht_read_byte（void）???//數據采集
{
??uchar?idata=0;
??DDRB=0x00;
??
??for（i=0;i<8;i++）
????{
	??while（!（PINB&0X80））;??//等待50us的低電平數據位間隙過去，等待高電平
	??
	??delay_us（15）;
	??delay_us（15）;
	??delay_us（10）;
	??data<<=1;
	??if（（PINB&0x80））
	?????{
		???data|=0x01;
		?}
	??else?
	?????{
		???data|=0x00;
		?}
		
	??while（（PINB&0x80））;?//等待50us低電平到來，然后去讀取下一位數據
	}

	??return（data）;
}

void?dht_read_data（void）????//啟動信號
{
??uchar?i;
??DDRB=0xff;
??PORTB=0xff;
??delay_ms（5）;
??
??PORTB&=~（1<??delay_ms（10）;
??delay_ms（8）;??????//啟動信號至少大于18ms
??
??PORTB|=1<??delay_us（15）;
??delay_us（15）;
??
??DDRB=0x00;?????????//輸入模式?????????
??PORTB&=~（1<??delay_us（15）;
??delay_us（15）;
??
??if（!（PINB&0X80））????//判斷從機是否有低電平響應信號
????
	?while（!（PINB&0x80））;??//判斷從機是否發出80us的低電平，等待響應信號結束
	?
	?while（（PINB&0X80））;???//等待高電平結束
	???????????????????????//先拉低總線80us應答，再拉高總線80us，進入到數據傳輸
	?for（i=0;i<5;i++）
	???{
	?????Data[i]=dht_read_byte（）;
	???}
	???
	?if（Data[0]+Data[2]==Data[4]）//校驗和=8bit_temp+8bit_RH
	???{
	?????RH_data_h=Data[0];???//整數
		?RH_data_l=Data[1];???//小數點
		?temp_data_h=Data[2];?//整數
		?temp_data_l=Data[3];?//小數點
		?check_data=Data[4];??//校驗和	?	?
	???}
	???????????
}




void?main（void?）
{

??lcd1602_init（）;
?//?show_display（）;
??
??while（1）

?屬性????????????大小?????日期????時間???名稱
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?????文件??????51200??2013-06-16?16:29??DHT11\AVR_mega128_mega16驅動溫濕度傳感器DHT11調試說明.doc

?????文件??????????0??2013-06-16?09:10??DHT11\BACKUP\dht11.c.130616091038

?????文件????????444??2013-06-16?09:48??DHT11\BACKUP\dht11.c.130616094848

?????文件????????444??2013-06-16?09:48??DHT11\BACKUP\dht11.c.130616094854

?????文件????????428??2013-06-16?09:49??DHT11\BACKUP\dht11.c.130616094908

?????文件????????778??2013-06-16?10:13??DHT11\BACKUP\dht11.c.130616101340

?????文件????????943??2013-06-16?10:18??DHT11\BACKUP\dht11.c.130616101832

?????文件???????1067??2013-06-16?10:25??DHT11\BACKUP\dht11.c.130616102540

?????文件???????1161??2013-06-16?10:26??DHT11\BACKUP\dht11.c.130616102646

?????文件???????1388??2013-06-16?10:32??DHT11\BACKUP\dht11.c.130616103246

?????文件???????1458??2013-06-16?10:38??DHT11\BACKUP\dht11.c.130616103822

?????文件???????1387??2013-06-16?10:41??DHT11\BACKUP\dht11.c.130616104124

?????文件???????1390??2013-06-16?10:41??DHT11\BACKUP\dht11.c.130616104150

?????文件???????1392??2013-06-16?10:43??DHT11\BACKUP\dht11.c.130616104330

?????文件???????1392??2013-06-16?10:43??DHT11\BACKUP\dht11.c.130616104334

?????文件???????1390??2013-06-16?10:45??DHT11\BACKUP\dht11.c.130616104514

?????文件???????1400??2013-06-16?10:47??DHT11\BACKUP\dht11.c.130616104702

?????文件???????1400??2013-06-16?10:47??DHT11\BACKUP\dht11.c.130616104710

?????文件???????1400??2013-06-16?10:47??DHT11\BACKUP\dht11.c.130616104740

?????文件???????1400??2013-06-16?10:47??DHT11\BACKUP\dht11.c.130616104756

?????文件???????1406??2013-06-16?10:48??DHT11\BACKUP\dht11.c.130616104828

?????文件???????1405??2013-06-16?10:48??DHT11\BACKUP\dht11.c.130616104840

?????文件???????1408??2013-06-16?10:48??DHT11\BACKUP\dht11.c.130616104848

?????文件???????1405??2013-06-16?10:48??DHT11\BACKUP\dht11.c.130616104900

?????文件???????1508??2013-06-16?10:53??DHT11\BACKUP\dht11.c.130616105348

?????文件???????1512??2013-06-16?11:08??DHT11\BACKUP\dht11.c.130616110820

?????文件???????1530??2013-06-16?11:09??DHT11\BACKUP\dht11.c.130616110912

?????文件???????1532??2013-06-16?11:22??DHT11\BACKUP\dht11.c.130616112216

?????文件???????1532??2013-06-16?11:22??DHT11\BACKUP\dht11.c.130616112222

?????文件???????1531??2013-06-16?11:22??DHT11\BACKUP\dht11.c.130616112226

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