void DS1307_GetTime(uint8_t* const Hour,
uint8_t* const Minute,
uint8_t* const Second)
{
#if defined(DUMMY_RTC)
*Hour = 1;
*Minute = 1;
*Second = 1;
return;
#endif
if (TWI_StartTransmission(DS1307_ADDRESS_WRITE, 10))
{
TWI_SendByte(DS1307_TIMEREG_START);
TWI_StopTransmission();
}
DS1307_TimeRegs_t CurrentRTCTime;
if (TWI_StartTransmission(DS1307_ADDRESS_READ, 10))
{
TWI_ReceiveByte(&CurrentRTCTime.Byte1.IntVal, false);
TWI_ReceiveByte(&CurrentRTCTime.Byte2.IntVal, false);
TWI_ReceiveByte(&CurrentRTCTime.Byte3.IntVal, true);
TWI_StopTransmission();
}
*Second = (CurrentRTCTime.Byte1.Fields.TenSec * 10) + CurrentRTCTime.Byte1.Fields.Sec;
*Minute = (CurrentRTCTime.Byte2.Fields.TenMin * 10) + CurrentRTCTime.Byte2.Fields.Min;
*Hour = (CurrentRTCTime.Byte3.Fields.TenHour * 10) + CurrentRTCTime.Byte3.Fields.Hour;
}
void DS1307_GetDate(uint8_t* const Day,
uint8_t* const Month,
uint8_t* const Year)
{
#if defined(DUMMY_RTC)
*Day = 1;
*Month = 1;
*Year = 1;
return;
#endif
if (TWI_StartTransmission(DS1307_ADDRESS_WRITE, 10))
{
TWI_SendByte(DS1307_DATEREG_START);
TWI_StopTransmission();
}
DS1307_DateRegs_t CurrentRTCDate;
if (TWI_StartTransmission(DS1307_ADDRESS_READ, 10))
{
TWI_ReceiveByte(&CurrentRTCDate.Byte1.IntVal, false);
TWI_ReceiveByte(&CurrentRTCDate.Byte2.IntVal, false);
TWI_ReceiveByte(&CurrentRTCDate.Byte3.IntVal, true);
TWI_StopTransmission();
}
*Day = (CurrentRTCDate.Byte1.Fields.TenDay * 10) + CurrentRTCDate.Byte1.Fields.Day;
*Month = (CurrentRTCDate.Byte2.Fields.TenMonth * 10) + CurrentRTCDate.Byte2.Fields.Month;
*Year = (CurrentRTCDate.Byte3.Fields.TenYear * 10) + CurrentRTCDate.Byte3.Fields.Year;
}
/*
description:向eeprom读一个页内的部分或者全部数据
return：0--写数据正常结束
1--I2C启动错误
2--无ACK
*/
uint8_t eeprom_read_sequential(uint16_t addr,uint16_t num,uint8_t *data)
{
uint8_t result = 0;
uint8_t temp = 0;
uint16_t i = 0;
while(is_eeprom_busy());
result = TWI_START();
if(result != TWI_READY)
return 1;
#if(MEM_SIZE > SIZE_64K)
if(eeprom_num == 1)
temp = DEV_ADDR1|0;
else
temp = DEV_ADDR2|0;
#else
temp = DEV_ADDR|0;
#endif
result = TWI_SendByte(temp);
if(result != TWI_ACK)
return 2;
result = TWI_SendByte((uint8_t)(addr>>8));
result = TWI_SendByte((uint8_t)(addr));
if(result != TWI_ACK)
return 2;
result = TWI_START();
#if(MEM_SIZE > SIZE_64K)
if(eeprom_num == 1)
temp = DEV_ADDR1|1;
else
temp = DEV_ADDR2|1;
#else
temp = DEV_ADDR|1;
#endif
result = TWI_SendByte(temp);
if(result != TWI_ACK)
return 2;
for(i = 0; i < num; i++)
{
data[i] = TWI_ReceiveByte();
if(i != num-1)
TWI_SendACK();
else
TWI_SendNACK();
}
TWI_STOP();
// delay_5ms();
return 0;
}
/*
description:向eeprom读一个字节数据
return：0--写数据正常结束
1--I2C启动错误
2--无ACK
*/
uint8_t eeprom_read_byte(uint16_t addr,uint8_t *data)
{
uint8_t result = 0;
uint8_t temp = 0;
while(is_eeprom_busy());
result = TWI_START();
if(result != TWI_READY)
return 1;
#if(MEM_SIZE > SIZE_64K)
if(eeprom_num == 1)
temp = DEV_ADDR1|0;
else
temp = DEV_ADDR2|0;
#else
temp = DEV_ADDR|0;
#endif
result = TWI_SendByte(temp);
if(result != TWI_ACK)
return 2;
result = TWI_SendByte((uint8_t)(addr>>8));
result = TWI_SendByte((uint8_t)(addr));
if(result != TWI_ACK)
return 2;
result = TWI_START();
#if(MEM_SIZE > SIZE_64K)
if(eeprom_num == 1)
temp = DEV_ADDR1|1;
else
temp = DEV_ADDR2|1;
#else
temp = DEV_ADDR|1;
#endif
result = TWI_SendByte(temp);
if(result != TWI_ACK)
return 2;
*data = TWI_ReceiveByte();
TWI_SendNACK();
TWI_STOP();
return 0;
}
uint8_t TWI_ReadPacket(TWI_t* const TWI,
const uint8_t SlaveAddress,
const uint8_t TimeoutMS,
const uint8_t* InternalAddress,
uint8_t InternalAddressLen,
uint8_t* Buffer,
uint16_t Length)
{
uint8_t ErrorCode;
if ((ErrorCode = TWI_StartTransmission(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_WRITE,
TimeoutMS)) == TWI_ERROR_NoError)
{
while (InternalAddressLen--)
{
if (!(TWI_SendByte(TWI, *(InternalAddress++))))
{
ErrorCode = TWI_ERROR_SlaveNAK;
break;
}
}
if ((ErrorCode = TWI_StartTransmission(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_READ,
TimeoutMS)) == TWI_ERROR_NoError)
{
while (Length--)
{
if (!(TWI_ReceiveByte(TWI, Buffer++, (Length == 0))))
{
ErrorCode = TWI_ERROR_SlaveNAK;
break;
}
}
}
TWI_StopTransmission(TWI);
}
return ErrorCode;
}
