|
|
我這邊可以將數據寫入AT24C02中，這證明我的模塊不是壞的。我現在想把DS1302的時間先存入AT24C02，然后再調用出來顯示在液晶屏上。我寫了以下代碼，還是不行。能幫我看一下嗎？
- unsigned char table4[9]={'0','0',':','0','0',':','0','0','\0'};
- void display_time()
- {
- uchar num,tmp0,tmp1,tmp2;
- uchar Second,Min,Hour;
- uchar Second0,Min0,Hour0;
- uchar Second1,Min1,Hour1;
- EEPROM_Software_Reset();
-
- Second = ds1302_read(0x81);//讀秒
- Min = ds1302_read(0x83);//讀分
- Hour = ds1302_read(0x85);//讀時
-
- EEPROM_Byte_Write(0xa0,0x00,Second);
- EEPROM_Byte_Write(0xb0,0x00,Min);
- EEPROM_Byte_Write(0xc0,0x00,Hour);
-
- tmp0 = EEPROM_CurrentAddr_Read(0xa1);
- tmp1 = EEPROM_CurrentAddr_Read(0xb1);
- tmp2 = EEPROM_CurrentAddr_Read(0xc1);
-
- Second0 = (tmp0 & 0x0f) + 0x30;//秒的個位
- Second1 = ((tmp0 & 0x7f) >> 4) + 0x30;//秒的十位
- Min0 = (tmp1 & 0x0f) + 0x30;//分的個位
- Min1 = ((tmp1& 0x7f) >> 4) + 0x30;//分的十位
- Hour0 = (tmp2 & 0x0f) + 0x30;//秒的個位
- Hour1 = ((tmp2 & 0x7f ) >> 4) + 0x30;//時的十位
- table4[6]= Second1;
- table4[7]= Second0;
- table4[3]= Min1;
- table4[4]= Min0;
-
- table4[0]= Hour1;
- table4[1]= Hour0;
-
- lcd_pos(3,1); //顯示在第四行第2個字符
- for(num=0;num<8;num++)//顯示長度
- {
- lcd_wdat(table4[num]);
- }
- }
- //////////////////AT24C02//////////////////
- void EEPROM_Software_Reset(void)
- {
- uchar i;
- IIC_Start();
- //9 clocl
- scl = 0;
- sda = 1;
- for(i=0;i<9;i++)
- {
- scl = 0;
- _nop_();//delay
- _nop_();
- scl = 1;
- _nop_();//delay
- scl = 0;
- _nop_();//delay
- _nop_();
- }
- IIC_Start();
- IIC_Stop();
- }
- void IIC_Start(void)
- {
- scl = 0;
- sda = 1;
- scl = 1;
- _nop_();
- sda = 0;
- nop_();
- }
- void IIC_Stop(void)
- {
- scl = 0;
- sda = 0;
- scl = 1;
- _nop_();
- sda = 1;
- }
- void IIC_Write_Byte(uchar dataSend)
- {
- uchar i;
- for(i=0;i<8;i++)
- {
- scl = 0;
- if(dataSend & 0x80)sda = 1;//′ó×î¸ßλ¿aê¼D′
- else sda = 0;
- _nop_();
- scl = 1;
- _nop_();
- scl = 0;
- _nop_();
- dataSend <<= 1;
- }
- }
- uchar IIC_Read_Byte(void)
- {
- uchar dataRead,i;
- for(i=0;i<8;i++)
- {
- dataRead <<= 1;
- scl = 0;
- sda = 1;
- _nop_();
- _nop_();
- scl = 1;
- _nop_();
- if(sda)dataRead |= 0x01;
- _nop_();
- scl = 0;
- _nop_();
- _nop_();
- }
- return dataRead;
- }
- bit IIC_Ack(void)
- {
- bit flag;
- scl = 0;
- sda = 1;
- _nop_();
- _nop_();
- scl = 1;
- _nop_();
- flag = sda;//¶áSDA
- _nop_();
- scl = 0;
- _nop_();
- _nop_();
- return flag;
- }
- void IIC_NoAck(void)
- {
- scl = 0;
- sda = 1;
- _nop_();
- _nop_();
- scl = 1;
- _nop_();
- _nop_();
- scl = 0;
- _nop_();
- _nop_();
- }
- void EEPROM_Byte_Write(uchar devAddr,uchar wordAddr,uchar dataSend)
- {
- IIC_Start();
- IIC_Write_Byte(devAddr);
- IIC_Ack();
- IIC_Write_Byte(wordAddr);
- IIC_Ack();
- IIC_Write_Byte(dataSend);
- IIC_Ack();
- IIC_Stop();
- Delay5ms();
- }
- uchar EEPROM_CurrentAddr_Read(uchar devAddr)
- {
- uchar dataRead;
- IIC_Start();
- IIC_Write_Byte(devAddr);
- IIC_ACK();
- dataRead = IIC_Read_Byte();
- IIC_NoACK();
- ICC_Stop();
- return dataRead;
- }
|
|
