Write Onewire data toa I2C memory / read ASCI

**languer** · - 18th October 2008, 07:26

Don't mean to jump in the middle of everything here, but let me see if I can summarize perhaps what you want to do.

You want to write both "TEXT" and digits to the EEPROM using one (or several) I2CWRITE command; and you want to read them, again, using one I2CREAD command correct?

If this is so, I think you really want to revisit what ARATTI said on post #32. Using the STR, [Str Celsius\32], modifier allows to access a whole string (array) which is what you want to do. Let me note though, that this would be an awfull waste of resources. Storing the numeric value in the EEPROM is good, but all additional processing and characters do not need to be on EEPROM.

skimask · - 18th October 2008, 07:56

Originally Posted by languer

If this is so, I think you really want to revisit what ARATTI said on post #32. Using the STR, [Str Celsius\32], modifier allows to access a whole string (array) which is what you want to do. Let me note though, that this would be an awfull waste of resources. Storing the numeric value in the EEPROM is good, but all additional processing and characters do not need to be on EEPROM.

He did mention in post #35 that he only wants to store/retrieve the temp results only, not the whole string. But I agree, he should re-visit post #32, as well as post #2, #8, #23, and #25.
And now that he has an LCD to play with, should re-visit those posts along with trying different methods of displaying numbers on the LCD to get a good idea on how those commands and/or modifiers actually work. Then build up to displaying the results using those modifiers to a 5x7 LED matrix.

**Eugeniu** · - 18th October 2008, 20:01

languer;64350] Don't mean to jump in the middle of everything here, but let me see if I can summarize perhaps what you want to do.

You want to write both "TEXT" and digits to the EEPROM using one (or several) I2CWRITE command; and you want to read them, again, using one I2CREAD command correct?

I want to write on memory : simple text ,( letters and ciphers) , data for 2 temperature ,( inside and out ), day , month , year , houre , minutes .And in this monent I do not know to convert hexa result from DS1820 to ASCII to can be some as text .

If this is so, I think you really want to revisit what ARATTI said on post #32. Using the STR, [Str Celsius\32], modifier allows to access a whole string (array) which is what you want to do.

Why ? I have a program that work . Do you read it ? I'll try to translate in englesh for easily understand . What you say is to do an other program .

Let me note though, that this would be an awfull waste of resources. Storing the numeric value in the EEPROM is good, but all additional processing and characters do not need to be on EEPROM

Is not true , I must to have all in eeprom to can read together ( in my idea and in program what I use now )

**Eugeniu** · - 18th October 2008, 21:58

Hi !

Here is some informations about DS 1820 "

TEMPERATURE/DATA RELATIONSHIP Table 2
TEMPERATURE DIGITAL OUTPUT DIGITAL OUTPUT
_______________(Binary)_____________(Hex)

+85.0°C*____ 0000 0000 1010 1010___00AAh
+25.0°C ____ 0000 0000 0011 0010___0032h
+0.5°C______ 0000 0000 0000 0001 __0001h
0°C_________0000 0000 0000 0000___0000h
-0.5°C______1111 1111 1111 1111____FFFFh
-25.0°C_____1111 1111 1100 1110____FFCEh
-55.0°C_____1111 1111 1001 0010____FF92h

only right byte I use , but I must to conver it in decimal . The left byte I use only to put "-" sign when it is = FFh .For right side of comma , I use byte 6 from sensor - COUNT REMAIN- . Tell me how convert right byte in decimal

skimask · - 19th October 2008, 00:03

Might I suggest that you back up in your process just a bit and practice/learn how to convert and display various types of numbers in general before trying to convert and display a result from a temperature sensor.
You don't seem to understand that the references to the earlier posts that we are giving you have the some of the information and answers you need to finish your project, DIG is on of those, if not the only one you'll need to convert your data from the binary format to the ASCII format (along with a bit of simple addition) to send to your display subroutine.
We do not have the hardware you have. We do not have the same 'vision' of the final project that you have, therefore, I think it is relatively unreasonable to ask others to write code FOR you, since that code that is written probably won't work for YOUR particular setup in the end. One thing that DOES work almost everytime though is trying to give a person the building blocks to start somewhere and end up somewhere else...

**Eugeniu** · - 19th October 2008, 09:53

Originally Posted by skimask

Might I suggest that you back up in your process just a bit and practice/learn how to convert and display various types of numbers in general before trying to convert and display a result from a temperature sensor............................................ ...

OK ! I ' ll do , be sure . Thank you all , for your help . If have you a new idea , pleace , let me know it .

PS. I have tried all your ideas , and DIG , but they do not work .

skimask · - 19th October 2008, 18:59

Originally Posted by Eugeniu

OK ! I ' ll do , be sure . Thank you all , for your help . If have you a new idea , pleace , let me know it .
PS. I have tried all your ideas , and DIG , but they do not work .

I'm trying to help you out. I think in this case, it's a language thing...
DIG should work for you...pulling individual digits out of the results and displaying them one by one. I don't know what else to say how or to say it for that matter that'll make more sense to you.

**Eugeniu** · - 19th October 2008, 19:56

Originally Posted by skimask

I'm trying to help you out. I think in this case, it's a language thing...
DIG should work for you...pulling individual digits out of the results and displaying them one by one. I don't know what else to say how or to say it for that matter that'll make more sense to you.

Look here , is what I have tried :

adr = 22
i2cwrite I2CDAT, I2CCLK, $A0, adr,[temperature.LOWBYTE dig 4+48 ]
pause 15
adr=25
i2cwrite I2CDAT, I2CCLK, $A0, adr,[temperature.LOWBYTE dig 3+48]
pause 15
adr=28
i2cwrite I2CDAT, I2CCLK, $A0, adr,[temperature.LOWBYTE dig 2 + 48]
pause 15
adr=31
i2cwrite I2CDAT, I2CCLK, $A0, adr,[temperature.LOWBYTE dig 1+ 48]
pause 15
adr = 34
i2cwrite I2CDAT, I2CCLK, $A0, adr,[temperature.LOWBYTE dig 0 + 48]
pause 15

...on display I read 0 0 1 2 1 or 0 0 2 2 2 , and other numbers .

I'll try to explain my program ( this side with display ) :
after read a sign from eeprom program look in SELECT CASE CARACTER for a ASCI code and return a runing number >>>>

SELECT CASE CARACTER

CASE 65: SIR_NO=4 ;A
CASE 66: SIR_NO=9 ;B
CASE 67: SIR_NO=14 ;C
CASE 68: SIR_NO=19 ;D
CASE 69: SIR_NO=24 ;E
CASE 70: SIR_NO=29 ;F
CASE 71: SIR_NO=34 ;G
CASE 72: SIR_NO=39 ;H
CASE 73: SIR_NO=42 ;I
CASE 74: SIR_NO=47 ;J
CASE 75: SIR_NO=52 ;K
CASE 76: SIR_NO=57 ;L
CASE 77: SIR_NO=62 ;M
CASE 78: SIR_NO=67 ;N
CASE 79: SIR_NO=72 ;O
CASE 80: SIR_NO=77 ;P
CASE 81: SIR_NO=82 ;Q
CASE 82: SIR_NO=87 ;R
CASE 83: SIR_NO=92 ;S
CASE 84: SIR_NO=97 ;T
CASE 85: SIR_NO=102 ;U
CASE 86: SIR_NO=107 ;V
CASE 87: SIR_NO=112 ;W
CASE 88: SIR_NO=117 ;X
CASE 89: SIR_NO=122 ;Y
CASE 90: SIR_NO=127 ;Z
CASE 32: SIR_NO=132 ;SPATIU
CASE 48: SIR_NO=137 ;0
CASE 49: SIR_NO=140 ;1
CASE 50: SIR_NO=145 ;2
CASE 51: SIR_NO=150 ;3
CASE 52: SIR_NO=155 ;4
CASE 53: SIR_NO=160 ;5
CASE 54: SIR_NO=165 ;6
CASE 55: SIR_NO=170 ;7
CASE 56: SIR_NO=175 ;8
CASE 57: SIR_NO=180 ;9
CASE 46: SIR_NO=185 ;.
CASE 58: SIR_NO=188 ;:
CASE 61: SIR_NO=193 ;=
CASE 33: SIR_NO=196 ;!
CASE 45: SIR_NO=201 ;-
CASE 44: SIR_NO=204 ; ,
case 42: SIR_no=209 ; *
CASE 59: SIR_NO=212 ; ;

After this go to a tabel and serch for this runing number -OFSET-,from where return a matrix with what leds are on .

TABLOU:
LOOKUP OFSET,[_
$3F,$48,$48,$48,$3F,_ ;A 0-4
$36,$49,$49,$49,$7F,_ ;B 4-9
$22,$41,$41,$41,$3E,_ ;C 9-14
$3E,$41,$41,$41,$7F,_ ;D 14-19
$41,$49,$49,$49,$7F,_ ;E 19-24
$40,$48,$48,$48,$7F,_ ;F 24-29
$2E,$49,$49,$41,$3E,_ ;G 29-34
$7F,$08,$08,$08,$7F,_ ;H 34-39
$41,$7F,$41,_ ;I 39-42
$40,$7E,$41,$01,$02,_ ;J 42-47
$41,$22,$14,$08,$7F,_ ;K 47-52
$01,$01,$01,$01,$7F,_ ;L 52-57
$7F,$20,$10,$20,$7F,_ ;M 57-62
$7F,$04,$08,$10,$7F,_ ;N 62-67
$3E,$41,$41,$41,$3E,_ ;O 67-72
$30,$48,$48,$48,$7F,_ ;P 72-77
$3D,$42,$45,$41,$3E,_ ;Q 77-82
$31,$4A,$4C,$48,$7F,_ ;R 82-87
$26,$49,$49,$49,$32,_ ;S 87-92
$40,$40,$7F,$40,$40,_ ;T 92-97
$7E,$01,$01,$01,$7E,_ ;U 97-102
$7C,$02,$01,$02,$7C,_ ;V 102-107
$7E,$01,$0E,$01,$7E,_ ;W 107-112
$63,$14,$08,$14,$63,_ ;X 112-117
$70,$08,$07,$08,$70,_ ;Y 117-122
$61,$51,$49,$45,$43,_ ;Z 122-127
$00,$00,$00,$00,$00,_ ;SPATIU 127-132
$3E,$51,$49,$45,$3E,_ ;0 132-137
$01,$7F,$21,_ ;1 137-140
$31,$49,$45,$43,$21,_ ;2 140-145
$46,$69,$51,$41,$42,_ ;3 145-150
$04,$7F,$24,$14,$0C,_ ;4 150-155
$4E,$51,$51,$51,$72,_ ;5 155-160
$06,$49,$49,$29,$1E,_ ;6 160-165
$60,$50,$48,$47,$40,_ ;7 165-170
$36,$49,$49,$49,$36,_ ;8 170-175
$3C,$4A,$49,$49,$30,_ ;9 175-180
$00,$00,$00,$00,$01,_ ;. 180_185
$00,$24,$00,_ ;: 185_188
$28,$28,$28,$28,$28,_ ;= 188_193
$00,$7D,$00,_ ;! 193_196
$00,$08,$08,$08,$00,_ ;- 196_201
$00,$02,$01,_ ;, 201_204
$2A,$14,$3E,$14,$2A,_ ;* 204_209
$00,$0A,$01],DATE

I put this OFSET on a PIC port and scroll to left on display .

**languer** · - 19th October 2008, 19:06

Ok, look at the info below. Most of it came from http://www.rentron.com/PicBasic/one-wire3.htm and your posted program.

This may not be the most elegant method, but it should give you a start. I still do not think there is any real value in adding all the "text" characters to the EEPROM, but that's a different story.

Code:

' Additional Variables
Cold_Bit		VAR temperature.Bit11	' Sign-Bit for +/- Temp. 1 = Below 0 deg C
Sign			VAR BYTE	' +/- sign for temp display
temperature_int		VAR BYTE	' integer part of temperature   
temperature_dec		VAR BYTE	' fractional part of temperature

' Temperature Readout and manipulation
OWIn DQ, 0, [temperature.LOWBYTE, temperature.HIGHBYTE, Skip 4, count_remain, count_per_c]

IF Cold_Bit = 0 THEN	' If Cold_Bit = 0, positive temperature
    Sign  = "+"
    temperature = temperature & $00FF	' Mask lower byte of temperature
    (((temperature >> 1) * 100) - 25) + (((count_per_c - count_remain) * 100) / count_per_c)
ELSE	' If Cold_Bit = 1, negative temperature
    Sign  = "-"
    temperature = temperature & $00FF	' Mask lower byte of temperature
    (((temperature >> 1) * 100) - 25) + (((count_per_c - count_remain) * 100) / count_per_c)
ENDIF

'separate interger part from decimal part
temperature_int = ((temperature DIG 4) * 10) + (temperature DIG 3)	' integer part of temperature
temperature_dec = ((temperature DIG 1) * 10) + (temperature DIG 0)	' fractional part of temperature

'write digits to EEPROM
i2cwrite I2CDAT, I2CCLK, $A0, 71,[(temperature DIG 4)+48]	'load EEPROM with integer part
pause 5
i2cwrite I2CDAT, I2CCLK, $A0, 72,[(temperature DIG 3)+48]	'load EEPROM with integer part
pause 5
i2cwrite I2CDAT, I2CCLK, $A0, 74,[(temperature DIG 2)+48]	'load EEPROM with decimal part
pause 5  
i2cwrite I2CDAT, I2CCLK, $A0, 75,[(temperature DIG 1)+48]	'load EEPROM with decimal part
pause 5

skimask · - 19th October 2008, 19:12

Originally Posted by languer

Ok, look at the info below. Most of it came from http://www.rentron.com/PicBasic/one-wire3.htm and your posted program.

This may not be the most elegant method, but it should give you a start. I still do not think there is any real value in adding all the "text" characters to the EEPROM, but that's a different story.

I think his problem is extracting the individual digits out of the byte values to display on the LED matrix's, by using DIG, and he hasn't figured that part out yet, which is why I suggested earlier since he's got an LCD, to play with that first and get used to everything (and to find out if his temp sensor is actually working in the first place). Then build it all back up to displaying the reading on the LED matrix.

**Eugeniu** · - 19th October 2008, 20:14

Originally Posted by languer

Ok, look at the info below. Most of it came from http://www.rentron.com/PicBasic/one-wire3.htm and your posted program.

This may not be the most elegant method, but it should give you a start. I still do not think there is any real value in adding all the "text" characters to the EEPROM, but that's a different story.
...................................[/CODE]

Thank you for link . I do not find your example on this link . Tell me a link for it , or post all example .
I am looking for little time on this program ...and I see that they use LCD display with " DEC " command .

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