ADS1118采集数据输出，偶尔跳变

        我用ADS1118做采集，输出偶尔跳变，有些时候是在12小时以内跳，有些时候是在48小时以内跳。

        采集程序如下：

        unsigned char SPI_Read(unsigned char SPI_Cmd)
        {
                UCB0TXBUF = SPI_Cmd;
                while (!(IFG2 & UCB0TXIFG));              // USCI_B0 TX buffer ready?
                //IFG2 &= ~UCB0TXIFG;

                while (!(IFG2 & UCB0RXIFG));              // USCI_B0 RX buffer ready?
                SPI_Data = UCB0RXBUF;                     // Increment expected slave value
                //IFG2 &= ~UCB0RXIFG;

                while (UCBUSY & UCB0STAT);                // USCI_B0 busy?

                return SPI_Data;

        }

----------------------------------------------------------------------------------------------------------------

        int main(void)

        {

                while(1)

                {

                        SLV_Data1 = 0;
                        SLV_Data2 = 0;
                        SLV_Data3 = 0;
                        SLV_Data4 = 0;

                        P3OUT &= ~BIT7;        //CS拉低

                        SLV_Data1 = SPI_Read(0xBB);  //1011 1011
                        SLV_Data2 = SPI_Read(0x0A);  //0000 1010
                        SLV_Data3 = SPI_Read(0x00);  //1011 1011
                        SLV_Data4 = SPI_Read(0x00);  //0000 1010

                        while(P1IN & BIT6);        //DATA OUTPUT AND DATA READY

                        P3OUT |= BIT7;               //CS拉低

                }

        }