求教430单片机读取DHT11温湿度传感器的值，为什么不对呢？

#include#defineucharunsignedchar#defineuintunsignedint#defineDATA_INP1DIR|=BIT2;//P1REN|=BIT2;#defineDATA_OUTP1DIR&=~BIT2;//P1REN|=BIT2;#defineS_DATA_HP1OUT... #include #define uchar unsigned char #define uint unsigned int #define DATA_IN P1DIR |= BIT2; //P1REN |=BIT2; #define DATA_OUT P1DIR &=~BIT2; //P1REN |=BIT2; #define S_DATA_H P1OUT |= BIT2; #define S_DATA_L P1OUT &=~BIT2; #define G_DATA P1IN&0X04 uchar value; void main(void) {uchar x;
uchar j，i，temp=0;
WDTCTL=WDTPW+WDTHOLD;
DATA_OUT;
S_DATA_H;

while(1)
{
S_DATA_L;
__delay_cycles(1800); //>18ms
S_DATA_H;
__delay_cycles(50);
DATA_IN;
while(G_DATA!=0); //等待从机拉高
__delay_cycles(65); //80us
for(j=5;j>0;j++)
{
for(i=8;i>0;i--)
{
value<<=1;

while(G_DATA==0); //等待从机数据
temp=0; //短，0
__delay_cycles(40); //40us
while(G_DATA!=0)
temp=1; //长，1
value |=temp;
__delay_cycles(50); //40us
} } } }

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