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pic軟件計算奇偶校驗，發(fā)送1,2,3,4,5。顯示3F，3F，03，3F，05。請大家?guī)兔纯?/font>
uint add (uint data) //奇校驗 1的個數(shù)為奇數(shù)
{
uint i = 0;
int cnt = 0;
int temp = 0;
for(i = 0;i < 8;i++)
{
temp = ((data >> i) & 1);
cnt += temp;
}
if(cnt%2 == 0)
{
return 1;
}
else
{
return 0;
}
}
void Usart_Init (void)
{
RCSTA = 0xD0; //9位接收
TXSTAbits.TX9 = 1; //9位發(fā)送
TXSTAbits.TXEN = 1; //使能發(fā)送
TXSTAbits.SYNC = 0; //異步
TXSTAbits.BRGH = 1; //高速
BAUDCONbits.BRG16 = 0; //SYNC = 0, BRGH = 1, BRG16 = 0
SP1BRGH = 0;
SP1BRGL = 0x19; //25,波特率9600
RCIE = 1;
RCIF = 0;
// TXIE = 1;
}
void Usart_SEND (uint TX)
{
TXSTAbits.TX9D = add(TX);
TXREG = TX;
while(!TXSTAbits.TRMT);
delayus(50);
}
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