说明：  //19200波特率每字符时间为572us,1.5个字符时间为858+572=1430us,3.5个字符时间为2002+572=2574us //1.5个字符时间T1_15延时常数：(65536-T1_15)=1430,T1_15=64106=0xFA6A //3.5个字符时间T1_35延时常数：(65536-T1_35)=2574,T1_35=62962=0xF5F2 //对某一站号发出命令后，在10ms之内没有收到正确的信息帧，认为无此站号 //用TMR0延时10ms:256*K=10000,得K＝39,取预分频比为1:64, //(256-X)×64＝10000,得X＝100=0x64
(//19200 baud per character time 572us, 1.5 character times as 858+572 = 1430us, 3.5 character times as 2002+572 = 2574us// 1.5 character times T1_15 constant delay: (65536-T1_15) = 1430, T1_15 = 64106 = 0xFA6A// 3.5 character times T1_35 constant delay: (65536-T1_35) = 2574, T1_35 = 62962 = 0xF5F2// station number of a command is issued after 10ms the correct information is not received within the frame, that no such station number// using TMR0 delay 10ms: 256* K = 10000, was K = 39, to take the pre-divide ratio is 1:64,// ​ ​ (256-X) 64 = 10000, get X = 100 = 0x64)