main.c

st7单片机关于io口总线设计的源程序,使用ST7单片机的很有用

/******************************************************************************
COPYRIGHT 2003 STMicroelectronics
Source File Name :  main.c  
Group            :  IPSW,CMG-IPDF
Author           :  MCD Application Team
Date First Issued:  07/03/2002
********************************Documentation**********************************
General Purpose- This program configures all Port D pins in push-pull 
output mode, for ST72F521 device. The port pins D5 and D7 are made logical 
high. The port register is read and the data is compared with the written data. 
If there is any mismatch between the data read and written data, the control 
will stuck inside a 憌hile