8位数码管动态扫描显示实验(显示不用库函数) *显示用指针直接访问GPIO端口的输出寄存器，形式GPIOD->ODR *延时delay_nms(5)时，显示不闪烁 *74HC138 A--P2.2--PE.0 B--P2.3--PE.1 C--P2.4--PE.2 *74HC573 D0~D7---PD[0..7] LE---PE.3 *by 追梦 2011-4-3-8-bit digital dynamic scan showed that the experimen

AT89C51利用PCF8574演示I2C的通信,并用了7SEG-MPX4-CC数码管的Keil uVision4 C语言代码，并用proteus演示成功。(AT89C51 uses PCF8574 to demonstrate the communication of I2C, and uses Keil uVision4 C language code of 7SEG-MPX4-CC digital tube, and demonstrates success with proteus.)

User AVR with 7seg full option