WZ-S甲醛传感器使用说明应用案例笔记

WZ-S甲醛传感器使用说明，分为插针式和排线式2种，具体说明如下：
应用案例：
https://item.taobao.com/item.htm?spm=a230r.1.14.16.77576bb8fnscXp&id=589522011703&ns=1&abbucket=3#detail

应用代码：

u8 wzs_cmd[9]={0xFF,0x01,0x86,0x00,0x00,0x00,0x00,0x00,0x79};
UART2_sendNByte(wzs_cmd,9);


#pragma vector= UART2_R_OR_vector//0x19
__interrupt void UART2_R_OR_IRQHandler(void)
{
    u8 temp;
    u16 a;
    temp=UART2_DR;
        if(temp==0xff) 
            {
                UART2_RX_NUM = 0;
                start = 1;
            }
            if(start==1)
            {
                UART2_RX_BUF[UART2_RX_NUM] = temp ; 
                UART2_RX_NUM++; 
            }
    
            if((UART2_RX_NUM >= 9 )&& (UART2_RX_BUF[0]==0xff)&& (UART2_RX_BUF[1]==0x86))
            {
              
                a=(UART2_RX_BUF[2]*256+UART2_RX_BUF[3]);
                    if(a>=5000)a=5000;
                    hcho_rev=a;
                start  = 0;
                UART2_RX_NUM=0;
                UART2_RX_BUF[0] = 0;
                UART2_RX_BUF[1] = 0;
                
            }
            if(UART2_RX_NUM >=9)
            {
                start  = 0;
                UART2_RX_NUM=0;
                UART2_RX_BUF[0] = 0;
            }
    return;
}