逻辑分析仪

PC发送到单片机的命令共7个字节：

第一字节是触发信号，每bit对应一路信号，1为高电平触发，0为低电平触发；

第二字节是触发有效信号，每bit对应一路信号，1为忽略，0为有效；

第三、四字节是采样时间，对应如下：

2us=0x0402，5us=0x0a02，10us=0x1402，10us=0x2802，50us=0x6402，100us=0xc802，200us=0x3203，500us=0x7d03，1ms=0xfa03，2ms=0x7d04，4ms=0xfa04，8ms=0x7d05，16ms=0xfa05；

第五、六字节是一样的，为预触发：8=0％，7=12.5％，6=25％，5=37.5％，4=50％，3=62.5％，2=75％，1=87.5％

第七字节为模式，0=普通模式；1=外部时钟，上升延；2=外部时钟，下降延；3=外部触发，上升延；4=外部触发，下降延；5=静态模式；6没有查到，不知道是什么；7为测试模式的二进制信号；8为测试模式的AA、55；9为测试模式的清零。 -Logic Analyzer PC sent to the MCU orders were seven byte : the first byte of the trigger signal, every bit signal corresponding way, a trigger for the margin, 0 for low-level trigger; the second byte is effective trigger signal, every bit signal corresponding way, as a neglected, 0 for the effective; Third, the four bytes of sampling time counterparts are as follows : 2us = 0x0402, 5us = 0x0a02, 10us = 0x1402. 10us = 0x2802, 0x6402 = 50us, 100us = 0xc802. 200us = 0x3203, 500us = 0x7d03, 1ms = 0xfa03. PF = 0x7d04, 4ms = 0xfa04, 0x7d05 = 8ms, 0xfa05 = 16ms; Fifth, six byte is the same as that for pre-trigger : 8 = 0%, 7 = 12.5%. 6 = 25%, 5 = 37.5%, 4 = 50%, 3 = 62.5%, 2 = 75%, 1 = 87.5% for the seventh byte mode, the ordinary mode = 0; 1 = external clock, rose extension; 2 = external clock.