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lizby
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Joined: 17/05/2016
Location: United States
Posts: 3015

Posted: 06:32am 28 Feb 2017

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I'm trying to use the 24AT32 eeprom library created by twofingers for the Maximite and modified by Centrex for the uMite MMBasic 4.5D (eeprom on DS3132 module). I am trying to run this on an Explore-64 board with MMBasic V3.5B.

Link here: http://www.thebackshed.com/forum/forum_posts.asp?TID=6917&KW=AT24C32

I can write without getting an error message (after removing "$" from "SUB eeWrite"), but get "Error: Invalid function" when trying to read with either the eeGet$ or eeRead$ functions.
[code]
[115] Function eeGet$ (address, amount)
Error: Invalid function definition
>
[/code]
[code]
[147] Function eeRead$ (address)
Error: Invalid function definition
>
[/code]
I've tried redefining them as "FUNCTION eeRead (address) AS STRING", but get the same message.

Here is stripped down code. What is wrong with the function definition?

[code]
'********************************************
'********************************************
' EEPROM-Library v0.81
' -----------------------------------------
' by twofingers 09-2014 at TBS
' with parts from MMBasic Library
' for AT24V32 (32kBit EEPROM)
' at DS3231 or DS1307 RTC-Modules etc.
' MMBasic 4.5 for Maximite/Duinomite

'Modified by Centrex to run on uMITE
'28 pin 150 MMBasic 4.5D (11-2014)
'The origonal here
' http://www.thebackshed.com/Forum/forum_posts.asp?TID=6917&PN =9
'------------------------------------------
' eeWrite$: writes a string to address
' eeRead$ : reads a string from address
' eeGet$ : returns an amount of bytes from address
' eeWriteB: writes 1 byte to address
' eeReadB : reads 1 byte from address
' address may be between 0 to 4095
'
' eeSaveF : writes a 32 bit floatinpoint number
' eeSaveF4: writes a 32 bit floatinpoint number
' at EEPROM addresses divisible by 4
' (faster then eeSaveF)
' eeLoadF : reads a 32 bit floatinpoint number
' back from EEPROM using PEEK and POKE
' needs eeWriteB and eeReadB
'
' eeErase : deletes the whole eeprom w. verify
' this has been remmed out for the time being
'
' eeDump : shows content of eeprom or parts
' eeMon : displays whole eeprom content (scroll)
' remmed out for the time being
'
' I2CPROM (I2C address of your EEPROM)
' must always be defined globally
'-------------------------------------------
'
' Remark: A check for defective Bytes
' has a latency of ~1 sec !!
' Therefore one second should be elapsed after
' each write event and then follow a read/compare,
' if a verify is required.
'
'-------------------------------------------
'
'
' This code may be freely distributed and
' changed. Provided AS IS without any warranty.
' Use it at your own risk.
'********************************************
'********************************************

'#######################################
' Demonstration code
'--------------------
I2CPROM = &H57 'I2CAdress of EEPROM
'if unknown please use the i2CSanner
'or then datasheet

Print "Writing at 0 'THE BACKSHED DEMO'"
eeWrite 0,"THE BACKSHED DEMO"

Print:Print "reading back:"

Print
Print eeGet$(0,17)
'Print eeRead$(0)

end ' end DEMO

'******************************
Sub eeWrite (address, text$)
' Writes a string to AT24C32
'******************************
Local a,x,msb,lsb,PByte

' I2CPROM=&H57 ' 24C32-DS3231
If I2CPROM = 0 Then Print "Error: Please define I2CPROM globally": End

a=0

If Len(text$)+address>4095 Then Print "Error: Address too high!":End

I2C open 100,100 'ENABLE I2C
For x= address To address+Len(text$) 'writes a 0-byte at the end!
a=a+1
msb=Int(x/256) 'MSB
lsb=x Mod 256 'LSB

PByte=0:If a<256 Then PByte=Asc(Mid$(text$,a,1))

I2C write I2CPROM, 0, 3, msb, lsb, PByte
If MM.I2C <>0 Then Print "Error! 1=NAK 2=TIMEOUT"; MM.I2C: End
Pause 1
Next x
I2C close
If debug Then
Print "The string "+Chr$(34);:Print text$;
Print Chr$(34)+" was successfully written at address"address" into EEPROM."
EndIf
End Sub

'******************************
Function eeGet$ (address, amount)
' Returning a amount of bytes from
' address of an AT24C32.
'******************************
Local x,msb,lsb,tmp

' I2CPROM=&H57 ' 24C32-DS3231
If I2CPROM = 0 Then Print "Error: Please define I2CPROM globally": End

eeGet$=""

If address>4095 Then Print "Error: Address too high!":End
If amount>255 Then Print "Error: String would be too long!":End

I2C open 100,100 'ENABLE I2C
For x= address To address+amount-1

msb=Int(x/256) 'MSB
lsb=x Mod 256 'LSB

I2C write I2CPROM, 0,2,msb,lsb
I2C read I2CPROM, 0,1,tmp

If MM.I2C <>0 Then Print "Error! 1=NAK 2=TIMEOUT"; MM.I2C: End
eeGet$=eeGet$+Chr$(tmp)

Next x
I2C close
End Function

'******************************
Function eeRead$ (address)
'eeRead$ (address):
' Reads a zero-terminated string from AT24C32
'******************************
Local msb,lsb,tmp
' I2CPROM=&H57 ' 24C32-DS3231
If I2CPROM = 0 Then Print "Error: Please define I2CPROM globally": End

eeRead$=""

If address>4094 Then Print "Error: Address too high! (valid: 0-4094)":End

I2C open 100,100 'ENABLE I2C

Do

msb=Int(address/256) 'MSB
lsb=address Mod 256 'LSB

I2C write I2CPROM, 0,2,msb,lsb
I2C read I2CPROM, 0,1,tmp

If MM.I2C <>0 Then Print "Error! 1=NAK 2=TIMEOUT"; MM.I2C: End
If tmp=0 Then Exit 'leave loop
eeRead$=eeRead$+Chr$(tmp)
address=address+1

Loop While Len(eeRead$)=<255

I2C close
Function end
'return

'***********************************************************
[/code]
LanceEdited by lizby 2017-03-01

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matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 8582

Posted: 06:54am 28 Feb 2017

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get rid of the space between the function name and the opening bracket

lizby
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Joined: 17/05/2016
Location: United States
Posts: 3015

Posted: 07:22am 28 Feb 2017

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matherp said get rid of the space between the function name and the opening bracket

And presto! Both functions work. Thank you very much. I'll add a note to the original thread.

Lance

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twofingers
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Joined: 02/06/2014
Location: Germany
Posts: 1133

Posted: 09:10am 28 Feb 2017

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Hi Lizby!

Sorry for the trouble!!

I think you should use the updated version
2015-03-26_210818_eeProm_Lib_micromite_mk2_v0.82.zip
from 3/2015 in the original thread.

Regards
Michael

lizby
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Joined: 17/05/2016
Location: United States
Posts: 3015

Posted: 03:48pm 28 Feb 2017

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Thanks for that.

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