target.#3

用c8051f320单片机,任选两个IO口进行模拟IIC操做,用软件IIC对加速度芯片MXC6020进行读写操作(IIC接口)

#include "MEMSIC.h" 




/**********************************************************************************
*
*
*
***********************************************************************************/
void Sysclk_Init(void)                   // Initialize oscillator
{
    OSCICN = 0x80;                         // configure internal oscillator for
                                          // its lowest frequency
    RSTSRC = 0x04;     
}




/**********************************************************************************
*
*
*
***********************************************************************************/
void Port_Init(void)                     // Initialize crossbar and GPIO
{
   P1MDIN   = 0x7F;                      // Port 1 pin 7 set as analog input
   P0MDIN   = 0xFF;                      // Not analog input
   P0MDOUT  = 0x00;                      // Open-drain output
   P1MDOUT |= 0x0F;                      // Port 1 pins 0-3 set high impedence
   P2MDOUT |= 0x0C;                      // Port 2 pins 0,1 set high impedence

   P1SKIP   = 0x80;                      // Port 1 pin 7 skipped by crossbar
   XBR0     = 0x00;						    
   XBR1     = 0x40;                      // Enable Crossbar
}




/**********************************************************************************
*
*
*
***********************************************************************************/
void Interrupt_Init(void)
{
    ET2 = 1;				            // Enable Timer2 interrupt
	PT2 = 1;                            // Set T2 to High priority.
}




/**********************************************************************************
*
*
*
***********************************************************************************/
void WDT_Init(void)
{
}