static
void ReadRTC( void ) // Using Global struct RTC to store time into
{
BYTE i;
// init to 100k Baud
i2cOpen(I2C_MASTER, I2C_SLEW_OFF, EE_BAUD(CLOCK_FREQ, RTC_BAUD));
TRISG_RG0 =1; // enables the RTC, CLK via 2.2K onto DS1307
i2cWaitForIdle();
i2cPutStartAndWait(); //Write I2C Start Condition, and wait for it to complete
i2cPutByteAndWait(D1307_ADDR | I2C_WRITE);
if(i2cWasAckReceived()) // check only once for ack
{
i2cPutByteAndWait(0); // Set address register to 0
//Send repeated I2C start condition
i2cRestartAndWait();
//Send module address, and read/write bit (LSB bit) set - this is a read message
i2cPutByteAndWait(D1307_ADDR |I2C_READ);
if(i2cWasAckReceived()) // check only once for ack
{
for ( i = 0 ; i < RTCYear; i++)
{
rtc_regs[i]=i2cGetByte(I2C_ACK); //ACK each byte except for last one.
}
rtc_regs[i]=i2cGetByte(I2C_NACK); // NACK on last Byte, the Year
}
}
i2cPutStopAndWait();
LATG0 = 1; // disables the DS1307 clock
TRISG_RG0 =0; // drive Ds1307 clock line high
//reset I2C back to 400K Baud
i2cOpen(I2C_MASTER, I2C_SLEW_ON, EE_BAUD(CLOCK_FREQ, 400000));
return ;
}
// communicates via I2c and sets the RTC chip to the date & time
// returns 1 if successful
BYTE SetRTC( void ) // Using global RTC structure to set RTC from
{
BYTE i;
BYTE ret = 1;
rtc_regs[RTCYear] = hextoBCD(RTC.Year - 2000);
rtc_regs[RTCMonth] = hextoBCD(RTC.Month)& 0x1F;
rtc_regs[RTCDate] = hextoBCD(RTC.Date) & 0x3F;
rtc_regs[RTCHour] = hextoBCD(RTC.Hour) & 0x3f;
rtc_regs[RTCMin] = hextoBCD(RTC.Min) & 0x7f;
rtc_regs[RTCSec] = hextoBCD(RTC.Sec) & 0x7f; // Bit 7 contains the "Clock Halt" bit and must be 0 for the RTC to tun
rtc_regs[RTCDay] = 0; // no support for day of the week
rtc_regs[RTCControl] = 0x13; //32Khz square wave OC output -- In case we need it for the Baro device
// init to < 100K Baud
i2cOpen(I2C_MASTER, I2C_SLEW_OFF, EE_BAUD(CLOCK_FREQ, RTC_BAUD));
TRISG_RG0 =1; // enable the SCK onto the D1307
i2cWaitForIdle();
i2cPutStartAndWait(); //Write I2C Start Condition, and wait for it to complete
i2cPutByteAndWait(D1307_ADDR | I2C_WRITE);
if(i2cWasAckReceived())
{
i2cPutByteAndWait(0); // Set reg addr to 0
for (i = 0; i<8;i++)
i2cPutByteAndWait(rtc_regs[i]); // set RTC registers ignoring ack
}
else
ret = 0;
i2cPutStopAndWait();
LATG0 = 1; // disables the DS1307 clock
TRISG_RG0 =0; // drive Ds1307 clock line high
// reset I2C back to 400K Baud
i2cOpen(I2C_MASTER, I2C_SLEW_ON, EE_BAUD(CLOCK_FREQ, 400000));
return ret;
}
/*********************************************************************
* Function: BOOL MPFSInit(void)
*
* PreCondition: None
*
* Input: None
*
* Output: TRUE, if MPFS Storage access is initialized and
* MPFS is is ready to be used.
* FALSE otherwise
*
* Side Effects: None
*
* Overview: None
*
* Note: None
********************************************************************/
BOOL MPFSInit(void)
{
mpfsOpenCount = 0;
mpfsFlags.Val = 0;
#if defined(MPFS_USE_PGRM)
return TRUE;
#else
/*
* Initialize the EEPROM access routines.
* Use ~ 400 Khz.
*/
XEEInit(EE_BAUD(CLOCK_FREQ, 400000));
return TRUE;
#endif
}
