键盘扫描子程序其流程是打开数字小键盘扫描程序,使单片机每隔1/128s扫描一次按键,然后将该信息经过单片机的消抖程序进行处理,若检测到有按键按下,则返回相应的键值。通过内部编写的程序将返回的键值转换为十六进制数,便于程序的条件判断测量电阻和电容所选用的量程。
数据存取流程是将每次测量元件类型、大小参数写入AT24C02,并能够读取近十次的测试记录。若所测元件的次数大于10次,按功能键则显示近10次的测量结果。
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