system_config.c

以C8051F330为核心,开发单端正激型开关电源充电器,C8051F330负责电流环及电压环采样及对应脉宽PWM输出,控制主电路MOSFET管,构成负反馈.

#include "switch_power.h"



void Sysclk_Init(void)                   // Initialize oscillator
{
    OSCICN = 0x83;                         // configure internal oscillator 
    CLKSEL = 0x00;                         // not divide 24.5MHz
    RSTSRC = 0x04;                         // Missing clock detector
                                           // enable missing clock detector  
}                                          





/**********************************************************************************
*
*
*
***********************************************************************************/
void Port_Init(void)                     // Initialize crossbar and GPIO
{
   P0MDIN   = 0xFF;                      // 0/analog input1/Not analog input
   P0MDOUT  = 0xFF;                      // 0/Open-drain output 1/ set as push-pull
   P0SKIP   = 0x0f;                      // P0.0 as Vref P0.1 as IDA P0.2 as X1 P0.3 as X2

   P1MDIN   = 0xCF;                      // Port 1 pin 7 set as analog input
   P1MDOUT  = 0xFF;                      // Port 1 pins 0-3 set high impedence
   P1SKIP   = 0x30;                      // P1.4 and P1.5 as AD input

   XBR0     = 0x00;						    
   XBR1     = 0x41;                      // Enable Crossbar and PCA0(CEX0) at p0.4
}




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




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





/**********************************************************************************
*
*
*
***********************************************************************************/
void Vref_Initial(void)
{
    REF0CN = 0x0B;//bit 3 vref pin(0) or vdd(1) used as voltage reference
	              //bit 2 temperature sensor off
				  //bit 1 internal biase generator on
				  //bit 0 internal voltage reference driven on the vref pin(0/vdd 1/2.45v)
}