管脚驱动问题

2万 · 2012-10-5 18:22

CY8C24794
请问如何在程序中动态改变某个管脚的驱动，比如从高阻态和驱动到低之间来回切换？

2万 · 2012-10-5 18:24

你是怎么做的呢

2万 · 2012-10-5 18:26

哦，这是我的做法，不知为何不能实现？
void set_Resistive_pull_down(void)
{
//this address range in Bank 0
CPU_F_Temp=CPU_F;
M8C_SetBank0;
PRT0DM0|=1<<7;
  PRT0DM1&=~(1<<7);
//this address range in Bank 1
M8C_SetBank1;
  PRT0DM2&=~(1<<7);
CPU_F=CPU_F_Temp;
PRT0DR&=~(1<<7);
}
void set_High_impedance_analog(void)
{
  //this address range in Bank 0
CPU_F_Temp=CPU_F;
M8C_SetBank0;
PRT0DM0&=~(1<<7);
  PRT0DM1|=1<<7;
//this address range in Bank 1
M8C_SetBank1;
  PRT0DM2|=1<<7;
CPU_F=CPU_F_Temp;
}

//main program
main()
{
   while(1)
{
   set_Resistive_pull_down;
Delay(10);
set_High_impedance_analog;
Delay(10);
}
}