initial.#2

里面包括RS232和IIC对24LC256的读写代码 CYGNAL IDE打开项目

#include "c8051F330.h"
#include "rs232.h"


void Port_IO_Init(void)
{

	P0MDIN      = 0xFE;
	P1MDIN      = 0xF0;
    P0MDOUT     = 0xBD;
    P1MDOUT     = 0xFF;
    P0SKIP      = 0xC9;
    P1SKIP      = 0xFF;
    XBR1        = 0x40;
	XBR0        = 0x05;
	

}

void Oscillator_Init(void)
{
    OSCICN      = 0xC3;    //SYSCLK derived from Internal H-F Oscillator divided by 1.
}

void UART_Init(void)
{
	SCON0       = 0x50;    //Enable reception @ 8bits UART 
	ES0         = 1;	   //Enable UART interrupt
	TMOD       |= 0x20;    //*Baud rate is 9600bps*******  
    TH1         = 0x96;    //****************************
	TR1         = 1;       //Enable timer1

}

void I2C_Init(void)
{
	TMOD       |= 0x02;
    CKCON      |= 0x04;    //400k/s
    TH0         = 0xEC;
	EIE1        = 0x01;    //Enable SMBus interrupt
	SMB0CF     |= 0xD0;    //Enable SMBus and disable slave mode
    SMB0CN     |= 0x80;	   //SMBus work at master mode
	TR0         = 1;       //Enable timer1
}

void Timer3_Init(void)
{
    TMR3RLL     = 0x9F;	   //Timer3 will overflow at 25ms
    TMR3RLH     = 0x38;
	EIE1       |= 0x80;    //Enable timer3 interrupt
	TR2         = 1;       // Start Timer3
}