#include<p18f4420.h>
#include<xc.h>
#define _XTAL_FREQ 4000000
#pragma config OSC = XT
#pragma config WDT = OFF
#pragma config WDTPS =5
#pragma config PWRT = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOREN = ON // Brown-out Reset Enable bits (Brown-out Reset enabled and controlled by software (SBOREN is enabled))
#pragma config BORV = 0 // Brown Out Reset Voltage bits (Maximum setting)
//*********************** CONFIG2H***********************
//#pragma config WDT = ON // Watchdog Timer Enable bit (WDT disabled (control is placed on the SWDTEN bit))
//#pragma config WDTPS =1024 // Watchdog Timer Postscale Select bits (1:32)
//*********************** CONFIG3H*******************
#pragma config CCP2MX = PORTC // CCP2 MUX bit (CCP2 input/output is multiplexed with RC1)
#pragma config PBADEN = OFF // PORTB A/D Enable bit (PORTB<4:0> pins are configured as digital I/O on Reset)
#pragma config LPT1OSC = OFF // Low-Power Timer1 Oscillator Enable bit (Timer1 configured for higher power operation)
#pragma config MCLRE = ON // MCLR Pin Enable bit (MCLR pin enabled; RE3 input pin disabled)
// ***********************CONFIG4L********************
#pragma config STVREN = OFF // Stack Full/Underflow Reset Enable bit (Stack full/underflow will not cause Reset)
#pragma config LVP = OFF // Single-Supply ICSP Enable bit (Single-Supply ICSP disabled)
#pragma config XINST = OFF // Extended Instruction Set Enable bit (Instruction set extension and Indexed Addressing mode disabled (Legacy mode))
// ***********************CONFIG5L*********************
#pragma config CP0 = OFF // Code Protection bit (Block 0 (000800-001FFFh) not code-protected)
#pragma config CP1 = OFF // Code Protection bit (Block 1 (002000-003FFFh) not code-protected)
//*********************** CONFIG5H**********************
#pragma config CPB = OFF // Boot Block Code Protection bit (Boot block (000000-0007FFh) not code-protected)
#pragma config CPD = OFF // Data EEPROM Code Protection bit (Data EEPROM not code-protected)
//********************** CONFIG6L************************
#pragma config WRT0 = OFF // Write Protection bit (Block 0 (000800-001FFFh) not write-protected)
#pragma config WRT1 = OFF // Write Protection bit (Block 1 (002000-003FFFh) not write-protected)
//********************** CONFIG6H************************
#pragma config WRTC = OFF // Configuration Register Write Protection bit (Configuration registers (300000-3000FFh) not write-protected)
#pragma config WRTB = OFF // Boot Block Write Protection bit (Boot block (000000-0007FFh) not write-protected)
#pragma config WRTD = OFF // Data EEPROM Write Protection bit (Data EEPROM not write-protected)
// *********************CONFIG7L**************************
#pragma config EBTR0 = OFF // Table Read Protection bit (Block 0 (000800-001FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR1 = OFF // Table Read Protection bit (Block 1 (002000-003FFFh) not protected from table reads executed in other blocks)
// *********************CONFIG7H***************************
#pragma config EBTRB = OFF
///////////////////////////////IIC
#define SCL PORTDbits.RD7 // I2C clock, PORTC4 pin 4
#define SDA PORTBbits.RB2 // I2C data, PORTC5 pin 5
#define SDA_TRIS TRISBbits.TRISB2// SDA tris bit, PORTC pin 5
#define SCL_TRIS TRISDbits.TRISD7
#define ACKBIT 0x00 // ACK bit
#define NAKBIT 0x80 // NAK bit
#define CS PORTDbits.RD5
#define WR PORTDbits.RD4
#define DATA PORTCbits.RC7
#define BL PORTDbits.RD6
void lcd_init(void);
void lcd_write(unsigned char lcdbuf,unsigned char buflen);
void lcd_write_cmd(unsigned char cmd);
void lcd_write_data(unsigned char adr,unsigned char data);
void delay( unsigned char num);
void write_DS1307_data(unsigned char address,unsigned char data);
unsigned int read_DS1307_data(unsigned char address);
void DS1307new(void);
void bstart(void);
void bstop(void);
void Cack(void);
void Mack(void);
void Mnack(void);
void bit_in(unsigned char *data);
void bit_out(unsigned char data);
unsigned char byte_out(unsigned char data);
unsigned char byte_in(unsigned char ack);
void lcd_write_time(void);
unsigned char num[] = {0xf7,0x92,0xeb,0xdb,0x9e,0xdd,0xfd,0x93,0xff,0xdf};
unsigned char SEC,SEC_H,SEC_L,MIN,MIN_H,MIN_L,HOUR,HOUR_H,HOUR_L; //实时时钟
void lcd_init(void)
{
TRISDbits.RD5 = 0;
TRISDbits.RD4 = 0;
TRISDbits.RD6 = 0;
TRISCbits.RC7 = 0;
lcd_write_cmd(0x18); //片内RC振荡器
lcd_write_cmd(0x03);// 启动LCD偏值
lcd_write_cmd(0x01); //启动系统时钟
lcd_write_cmd(0x08);//关闭声音输出
lcd_write_cmd(0x05);///关闭WDT
lcd_write_cmd(0x80);//IRQ关闭
lcd_write_cmd(0x0e);//普通模式
}
void lcd_write(unsigned char lcdbuf,unsigned char buflen)
{
unsigned char i;
for(i = 0;i < buflen;i++)
{
WR = 0;
NOP();
if((lcdbuf & 0x80)==0x80)
{
DATA = 1;
}
else
{
DATA = 0;
}
NOP();
WR = 1;
NOP();
lcdbuf=lcdbuf<<1;
}
}
void lcd_write_cmd(unsigned char cmd)
{
CS = 0;
lcd_write(0x80,3);
lcd_write(cmd,9);
CS = 1;
}
void lcd_write_data(unsigned char adr,unsigned char data)
{
adr = adr<<1;
CS = 0;
lcd_write(0xa0,3);
lcd_write(adr,7);
lcd_write(data,8);
CS = 1;
}
void delay( unsigned char num)//
{
unsigned int i,j;
for( i = 0;i < num;i++)
{
for(j = 0;j<100;j++)
{
}
}
}
void bstart(void)
{
SDA_TRIS = 1; // Ensure SDA is high
SCL = 1; // Ensure SCL is high
__delay_us(10);
SDA_TRIS = 0; // Configure SDA as an output
SDA = 0; // Pull SDA low
__delay_us(10);
SCL = 0; // Pull SCL low
} // end bstart(void)
void bstop(void)
{
SDA_TRIS = 0;
SDA = 0;
SCL = 1; // Ensure SCL is high
__delay_us(15);
SDA = 1;
//SDA_TRIS = 1; // Allow SDA to be pulled high
__delay_us(10);
} // end bstop(void)
void bit_out(unsigned char data)
{
SCL = 0; // Ensure SCL is low
__delay_us(5);
if (data & 0x80) // Check if next bit is high
{
SDA_TRIS = 1;
// Release SDA to be pulled high
}
else
{
SDA_TRIS = 0; // Configure SDA as an output
SDA = 0; // Pull SDA low
}
SCL = 1 ; // Pull SCL high to clock bit
__delay_us(2);
//SCL = 0; // Pull SCL low for next bit
//__delay_us(5);
} // end bit_out(unsigned char data)
void bit_in(unsigned char *data)
{
SCL = 0; // Ensure SCL is low
SDA_TRIS = 1; // Configure SDA as an input
__delay_us(5);
SCL = 1; // Bring SCL high to begin transfer
__delay_us(3);
*data &= 0xFE; // Assume next bit is low
if (SDA) // Check if SDA is high
{
*data |= 0x01; // If high, set next bit
}
__delay_us(2);
SCL = 0; // Bring SCL low again
} // end bit_in(unsigned char *data)
unsigned char byte_out(unsigned char data)
{
unsigned char i; // Loop counter
unsigned char ack; // ACK bit
ack = 0;
for (i = 0; i < 8; i++) // Loop through each bit
{
bit_out(data); // Output bit
data = data << 1; // Shift left for next bit
}
bit_in(&ack); // Input ACK bit
return ack;
} // end byte_out(unsigned char data)
unsigned char byte_in(unsigned char ack)
{
unsigned char i; // Loop counter
unsigned char retval; // Return value
retval = 0;
for (i = 0; i < 8; i++) // Loop through each bit
{
retval = retval << 1; // Shift left for next bit
bit_in(&retval); // Input bit
}
bit_out(ack); // Output ACK/NAK bit
return retval;
} // end byte_in(void)
void write_DS1307_data(unsigned char address,unsigned char data)
{
bstart();
byte_out(0xd0);
byte_out(address);
byte_out(data);
bstop();
}
unsigned int read_DS1307_data(unsigned char address)
{
unsigned int data;
bstart();
byte_out(0xd0);
byte_out(address);
bstop();
bstart();
byte_out(0xd1);
data=byte_in(ACKBIT);
bstop();
return data;
}
void main( )
{
write_DS1307_data(0x00,0x00);开时钟
while(1)
{
BL = 1;
lcd_init();
SEC = read_DS1307_data(0x00)&0x7f;
MIN = read_DS1307_data(0x01);
//MIN_H=((MIN & 0xf0) >> 4);
//MIN_L=(MIN & 0x0f);
SEC_H=(SEC & 0xf0) >> 4;
SEC_L=SEC & 0x0f;
//lcd_write_data(32,num[MIN_H]);
// lcd_write_data(34,num[MIN_L]);
//lcd_write_data(36,num[SEC_H]);
lcd_write_data(38,num[SEC_L]);
}
}
上面有一部分是一个模具LCD，num[]l里面是显示0到9的数，但是读出DS1307里面的分秒后，不显示。 |
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