config.bak

ADI公司的关于光通讯模块的监控程序,在KEIL FOR ARM 的编译环境编译.程序大小约12K,芯片是ADu7020.

// cpu_config.c

/********************************************************************/
/*                                                                  */
/*      CPU Configurations                                          */
/*                                                                  */
/********************************************************************/

#include <ADuC7020.h>
#include "common.h"

void InitCPU()
{
    // GPIO Port0 configuration
    #if DEBUG == 0                      // target is sfp board
    GP0CON = 0x00000000;                // P0.4(ExtIRQ0 - Tx FAIL)
                                        // P0.5(ExtIRQ1 - Tx ALS)
                                        // P0.6(LOS_INV)
    #endif

    #if DEBUG == 1                      // target is aduc eval board
    GP0CON = 0x10000000;                // configure P0.7 as clock outputECLK)
    #endif	

    GP0DAT = 0x40000000;                // configure P0.6 as an output, set data LOW

    // GPIO Port1 configuration
    GP1CON = 0x00000022;                // P1.0(SCL)
                                        // P1.1(SDA)
                                        // P1.2(GPIO - free)
                                        // P1.3(GPIO - free)
                                        // P1.4(GPIO - Rx LOS)
                                        // P1.5(GPIO - RateSel)
                                        // P1.6(GPIO - free)
                                        // P1.7(GPIO - free)
    
    #if DEBUG == 1                
    GP1DAT = 0x80000000;                // configure P1.7 as an output
    #endif
    
    // GPIO Port2 configuration
    GP2CON = 0x00000000;                // P2.0(GPIO for SQUELCH)
    GP2DAT = 0x01010000;                // outputs high to enable SQUELCH(P2.0)
    GP2CLR = 0x00010000;                // outputs low to disable SQUELCH(P2.0)
    
    // GPIO Port4 configuration (for test porpose)
    #if DEBUG == 1
    GP4DAT = 0x04000000;                // configure P4.2 as an output
    #endif

    // I2C configuration
    I2C0ID0 = 0xA0;                      // primary I2C address A0h
    I2C0ID1 = 0xA2;                      // secondary I2C address A2h
    I2C0CFG = 0x4201;                    // enable I2C slave, Stop IRQ, disable TX FIFO requst IRQ
    
    // IRQ output configuration
	PLAIRQ = 0x1700;          // for stop detect using p1.0/p1.1

    // Bandgap Reference configuration
    REFCON = 0x01;                      // use internal 2.5V reference

    // ADC configuration
    ADCCON = 0x20;                      // powerup ADC

    // DAC configuration
    DAC0CON = 0x12;                     // 0 to VREF DAC0 output range
    DAC0DAT = 0x00000000;               // DAC0 to 0V
    DAC1CON = 0x12;                     // 0 to VREF DAC1 output range
    DAC1DAT = 0x00000000;               // DAC1 to 0V



    // IRQ, FIQ setup (for GNU-GCC)
    //IRQ = IRQ_Function;                 // specify Interrupt Service Rountine 
    //FIQ = FIQ_Function;                 // specify Interrupt Service Rountine 

    /*	Use Timer2 when final silicon available
    //Timer2 configuration
    T2LD = 0x2000;                      // 1 / 32.768kHz * 8191 = 250ms
    T2CON = 0xC0;                       // count down
                                        // periodic mode
                                        // binary format
                                        // prescale:1, source clock/1
                                        // source clock: internal 32.768KHz Oscillator 
    */

    // Timer1 configuration
    T1LD = 0x40;                        // 42000000/32768/20 (for overflow every 20Hz)
    T1CON = 0xCF;                       // count down
                                        // periodic mode
                                        // binary format
                                        // prescale:32768
                                        // source clock: core clock
}