eprom memory location

Further exploits of my trials with an 18F4580 has resulted in getting the two programs independantly migrated across and working. However when I merged the two together I was getting problems with the PID routines. I found that there was a conflict with the two codes as the both use the data comand to write to the EEprom area.

PID code uses this code

Code:

---

;----[EEPROM Data]----------------------------------------------------------
DATA @0,0

EE_spMode1        DATA 0                        ' 0=Manual mode, temp is set by Pot.
EE_SetPoint1      DATA WORD 260                ' 26.0 deg. after programming if not in manual mode
EE_pid_Kp1        DATA WORD $0700              ' PID constants
EE_pid_Ki1        DATA WORD $0080
EE_pid_Kd1        DATA WORD $0200
EE_pid_Ti1        DATA 8                        ' Update I-term every 8th call to PID
EE_pid_I_Clamp1  DATA 125                      ' Clamp I-term to max ±100
EE_pid_Out_Clamp1 DATA WORD 255                ' Clamp the final output to 255
EE_CH1PWR        DATA 1                        ' this needs to be set to 1 to enable heater channel

;---(PID channel 2 defaults)------
EE_spMode2        DATA 0                        ' 0=Manual mode, temp is set by Pot.
EE_SetPoint2      DATA WORD 260
EE_pid_Kp2        DATA WORD $0700              ' PID constants
EE_pid_Ki2        DATA WORD $0080
EE_pid_Kd2        DATA WORD $0200
EE_pid_Ti2        DATA 8                        ' Update I-term every 8th call to PID
EE_pid_I_Clamp2  DATA 125                      ' Clamp I-term to max ±100
EE_pid_Out_Clamp2 DATA WORD 255                ' Clamp the final output to 255
EE_CH2PWR        DATA 1                        ' this needs to be set to 1 to enable heater channel

;---(PID channel 3 defaults)------
EE_spMode3        DATA 0                        ' 0=Manual mode, temp is set by Pot.
EE_SetPoint3      DATA WORD 260
EE_pid_Kp3        DATA WORD $0700              ' PID constants
EE_pid_Ki3        DATA WORD $0080
EE_pid_Kd3        DATA WORD $0200
EE_pid_Ti3        DATA 8                        ' Update I-term every 8th call to PID
EE_pid_I_Clamp3  DATA 125                      ' Clamp I-term to max ±100
EE_pid_Out_Clamp3 DATA WORD 255                ' Clamp the final output to 255
EE_CH3PWR        DATA 1                        ' this needs to be set to 1 to enable heater channel

;---(PID channel 4 defaults)------
EE_spMode4        DATA 0                        ' 0=Manual mode, temp is set by Pot.
EE_SetPoint4      DATA WORD 260                ' 26.0 deg. after programming
EE_pid_Kp4        DATA WORD $0700              ' PID constants
EE_pid_Ki4        DATA WORD $0080
EE_pid_Kd4        DATA WORD $0125
EE_pid_Ti4        DATA 8                        ' Update I-term every 8th call to PID
EE_pid_I_Clamp4  DATA 125                      ' Clamp I-term to max ±100
EE_pid_Out_Clamp4 DATA WORD 255                ' Clamp the final output to 255
EE_CH4PWR        DATA 1                        ' this needs to be set to 1 to enable heater channel

---

The RTC code has this code

Code:

---

'EEPROM Locations
'        ----------------
        Data @0,74,97,110,70,101,98,77,97,114,65,112,114
                ' Jan Feb Mar Apr
        Data 77,97,121,74,117,110,74,117,108,65,117,103
                ' May Jun Jul Aug
        Data 83,101,112,79,99,116,78,111,118,68,101,99
                ' Sep Oct Nov Dec
        Data 84,117,101,87,101,100,84,104,117,70,114,105
                ' Tue Wed Thu Fri
        Data 83,97,116,83,117,110,77,111,110
                ' Sat Sun Mon

---

If I add just the latter to the PID code it causes the PID routine to incorrectly function. I've looked at the datasheet but my inexperience makes it as clear as mud.

Is there a way of using the two sets of data, but keeping them at separate memory locations so they don't clash

Malcolm, you can start from location 150 with your RTC code, but you will need to add 150 to all the read instructions in the RTC code, otherwise it will not work.

Al.

Code:

---

EEPROM Locations
'        ----------------
        Data @150,74,97,110,70,101,98,77,97,114,65,112,114
                ' Jan Feb Mar Apr
        Data 77,97,121,74,117,110,74,117,108,65,117,103
                ' May Jun Jul Aug
        Data 83,101,112,79,99,116,78,111,118,68,101,99
                ' Sep Oct Nov Dec
        Data 84,117,101,87,101,100,84,104,117,70,114,105
                ' Tue Wed Thu Fri
        Data 83,97,116,83,117,110,77,111,110
                ' Sat Sun Mon

---

Thank you for the prompt reply,

There is only one lookup section in the rtc code

Code:

---

FindDays:
        LookUp SetMonth-1,[31,28,31,30,31,30,31,31,30,31,30,31],CounterA

---

I assume I change this to

Code:

---

FindDays:
        LookUp SetMonth-150,[31,28,31,30,31,30,31,31,30,31,30,31],CounterA

---

EDIT: Tried that, and which the PID code now runs fine, the month is shown as hieroglyphics 27 hieroglyphics 2010

I also have this code which I gather would read the values

Code:

---

DisplayMonth:
        CounterB=CounterB*3-3        ' Convert BCD Month to EEPROM Start Address
DisplaySequence:
        For CounterA=CounterB to CounterB+2
                                ' Read and Display Month
                Read CounterA,CounterD
                LCDOut CounterD
                Next CounterA
        Return

---

What would I need to change ?

Add just 150 to :

Read (CounterA + 150),CounterD



... and see if it works.

Al.

Thankypu, works a treat....

I guess it was obvious really... but it had been a long day !