Design and ImplementatI/On of Hybrid System Composed of Many Buttons and Lights
Buttons and lights are often used in embedded system, if the quantity is less, can be directly driven by microcontroller I/O port ,the pro-gramming is relatively easy in this condition, but need more I/O port. If uses more number of buttons and lights and microcontroller I/O port is not enough, we need drive it by the scanning matrix, although it needs complex programming, timely scanning refresh, more system resource occupancy is used in this way. If uses a large number of buttons and lights, those conventional methods can't be competent, uses a chip of TM, designs a 126 lights and 63 keys mixed display panel.
NETL
NSTL
万方数据
