Counting keyboard: A phototypesetting input keyboard which calculates character width and spaces used and indicates space left in a line. 计字键盘:照相排字机的一种键盘,它计算每个字符和字隔的宽度,并显示该行字长余下的空位。
On CCS developing platform, several procedures were written, such as impulse counting, data communication in RS232 protocol and CAN protocol, as well the keyboard and display monitor. 在CCS开发平台上,编写了脉冲信号的计数,实际控制电压曲线的计算和装载,控制算法的比较和改进,RS232协议和CAN协议下的数据通信,以及键盘和显示的驱动程序。