/*=========================================================================================== Project : RTC(시계IC), 외부EEPROM I2C 통신 테스트 Version : LK-PB-F V01 Date : 2011-07-28 Author : Kyung Nam Lee Company : LKEMBEDDED Compiler: MPLAB+Hitech-C Comment : I2C통신을 이용하여 RTC(시계IC), 외부EEPROM IC를 제어하는 프로그램 예제소스이며, UART통신 포트로 RTC(시계IC), 외부EEPROM IC 정보를 출력하고 있다. ===========================================================================================*/ #include #include #define _XTAL_FREQ 16000000 //#define XTAL 16000000 // crystal frequency - 4MHz #include // Required to interface with delay routines #define LED_CLK 0X00 #define FNDDB_CLK 0X01 #define FND_BUZZER_CLK 0X02 #define LCDCON_CLK 0X03 #define LCDDB_CLK 0X04 #define DC_SERVO_MOTOR_Relay_CLK 0X05 #define DOT_LED_A_CLK 0X06 #define DOT_LED_K_CLK 0X07 #define CP_Sig 0X10 //Active Low Cp /* 코드 테스트 74hc574 Q핀으로 출력 값이 저장되고 있음을 프로그램머는 인지하여야 한다.*/ typedef unsigned char BYTE; typedef unsigned int WORD; typedef unsigned long DWORD; #define On 1 #define Off 0 BYTE Read_I2C(BYTE ID,BYTE addr) { BYTE Read_Data=0; // Start Condition SEN = 1; //---------- Initiate bus Start Condition while(SEN); //---------- Wait Start Condition is Finished // EEPROM Address Byte Write SSPBUF = ID; //---------- Send EEPROM ADDRESS & Write while(( SSPCON2 & 0x1F ) | ( RW )); //-------- Wait I2C Idle //while(SSPSTAT&0x04); while(ACKSTAT); //------- Wait ACK // Address Byte Write SSPBUF = addr; while(( SSPCON2 & 0x1F ) | ( RW )); //---------- Wait I2C Idle //while(SSPSTAT&0x04); while(ACKSTAT); //---------- Wait ACK // ReStart Condition RSEN = 1; //---------- Send Repeated Start while(RSEN); //---------- Wait ReStart Condition is Finished // EEPROM Address Byte Write SSPBUF = ID|1; //---------- Send EEPROM ADDRESS & Read while(( SSPCON2 & 0x1F ) | ( RW )); //---------- Wait I2C Idle //while(SSPSTAT&0x04); while(ACKSTAT); //---------- Wait ACK // Data Read Byte RCEN = 1; //---------- Enable Receive Mode while(RCEN); //---------- Wait Receiving is Idle Read_Data = SSPBUF; //---------- retrieve config reg or temp reg // Stop Condition PEN = 1; //---------- Enable Stop Condition while(PEN); //---------- Wait Stop Condition is Finished return(Read_Data); } void Write_I2C(BYTE ID,BYTE addr,BYTE data) { // Start Condition SEN = 1; //---------- Initiate bus Start Condition while(SEN); //---------- Wait Start Condition is Finished // EEPROM Address Byte Write SSPBUF = ID; //---------- Send EEPROM ADDRESS & Write while(( SSPCON2 & 0x1F ) | ( RW )); //---------- Wait I2C Idle // while(SSPSTAT&0x04); while(ACKSTAT); //---------- Wait ACK // Low Address Byte Write SSPBUF = addr; while(( SSPCON2 & 0x1F ) | ( RW )); //---------- Wait I2C Idle //while(SSPSTAT&0x04); while(ACKSTAT); //---------- Wait ACK // Data Byte Write SSPBUF = data; while(( SSPCON2 & 0x1F ) | ( RW )); //---------- Wait I2C Idle //while(SSPSTAT&0x04); //---------- Wait I2C Idle while(ACKSTAT); //---------- Wait ACK // Stop Condition PEN = 1; //---------- Enable Stop Condition while(PEN); //---------- Wait Stop Condition is Finished } void TxOut(unsigned char data) { while((TXSTA&0X02==0)); while((TXSTA&0X02==0)); //송신 버퍼 상태 체크 TXREG=data; } void putch(unsigned char byte) { /* output one byte */ while(!TRMT) /* set whilst TX in progress */ continue; TXREG = byte; } void IN1307_EEPROM_Test() { static unsigned char data,data1,data2=0; static unsigned char h,m,s=0; static unsigned eeprom_data=0; data=Read_I2C(0Xd0,0); data1=(data&0x0f); // 1의 자리 초 data2=(data&0x70); // 10의 자리 초 data2=(data2>>4)*10; //초 s=(data2+data1); data=Read_I2C(0Xd0,1); data1=(data&0x0f); // 1의 자리 초 data2=(data&0x70); // 10의 자리 초 data2=(data2>>4)*10; m=(data2+data1); //분 data=Read_I2C(0Xd0,2); data1=(data&0x0f); // 1의 자리 초 data2=(data&0x30); // 10의 자리 초 data2=(data2>>4)*10; h=(data2+data1); //시간 printf("RTC(hour:%d minute:%d second:%d) \r\n",h,m,s); } void SysInit() { //-- 입출력 레지스터 설정 초기화------------------ TRISA = 0X0f; TRISB = 0X01; PORTB = 0X00; TRISC = 0x80; PORTC = 0X00; TRISD = 0X00; PORTD = 0X00; TRISE = 0X00; PORTE = 0X00; TRISC3 = 1; //---------- Set SCL (PORTC,3) pin to input TRISC4 = 1; //---------- Set SDA (PORTC,4) pin to input SSPSTAT = 0B00000000; //---------- Slew Rate Control bit(400Khz)WER SSPCON1 = 0B00101000; //---------- SSPEN Enable SSPM = I2C Master Mode SSPCON2 = 0B00000000; SSPADD = 9; Write_I2C(0Xd0,0x00,0x00); //---------- RTC SECONDS Write_I2C(0Xd0,0x01,0x03); //---------- RTC MINUTES Write_I2C(0Xd0,0x02,0x06); //---------- RTC HOURS Write_I2C(0Xd0,0x07,0x13); //---------- RTC CONTROL RAM INITIALIZE //---통신 레지스터 초기화--------------------------- TXSTA = 0B00100000; //--TXEN=1 RCSTA = 0B10010000; //--SPE=1 SPBRG = 25; //--16Mhz = 9600Bps } void main() { SysInit(); //--- 시스템 설정 초기화 함수 while(1) while(1) //---Endless Loop { IN1307_EEPROM_Test(); } }