//****************************************************************//
//	????????????????DHT21使用范例?
//單片機?：?AT89S52?或?STC89C52RC?
//?功能??：串口發送溫濕度數據?晶振?11.0592M?波特率?9600?
//硬件連接：?P2.0口為通訊口連接DHT11DHT11的電源和地連接單片機的電源和地，單片機串口加MAX232連接電腦?
//?公司??：奧松電子????
//****************************************************************//

#include?
#include??
//
typedef?unsigned?char??U8;???????/*?defined?for?unsigned?8-bits?integer?variable?	??無符號8位整型變量??*/
typedef?signed???char??S8;???????/*?defined?for?signed?8-bits?integer?variable		??有符號8位整型變量??*/
typedef?unsigned?int???U16;??????/*?defined?for?unsigned?16-bits?integer?variable?	??無符號16位整型變量?*/
typedef?signed???int???S16;??????/*?defined?for?signed?16-bits?integer?variable?	??有符號16位整型變量?*/
typedef?unsigned?long??U32;??????/*?defined?for?unsigned?32-bits?integer?variable?	??無符號32位整型變量?*/
typedef?signed???long??S32;??????/*?defined?for?signed?32-bits?integer?variable?	??有符號32位整型變量?*/
typedef?float??????????F32;??????