I2C CONFUSION, Help needed please

[LinkMTech]

Checked it. It fails on the first write statement.

Okay let's fix that first.
Put brackets around the Loc as shown in the PBP manual to see if that helps.

Main:
High Led : Pause 500: Low Led : PAUSE 500
	Addr=$36
	I2CWRITE SDA,SCL,ADDR,[LOC],Fail  ' Test here first
	Addr=$37 ': pause 10                    ' OR If SDA=1 then main 
	I2CREAD SDA,SCL,ADDR,[LOC,VALUE] ',Fail
	PAUSE 25
	DEBUG  HEX Value,13,10
	PAUSE 250
	DEBUG "Done....",13,10
WHILE 1 : WEND
Goto Main

Fail:
	toggle portc.2
goto main

[FromTheCockpit]

I did exactly the same as above and the sequence completed fine. BUT the values are not consistent with the datasheet, I should get '$2E' from location 0, but WHATEVER location I try to read, I am getting '$FF'

[FromTheCockpit]

Have a look at my real term serial monitor. I am actually getting a lot of unexpected data which I don't understand how is getting stored in just one byte. Though among all this, I can see '2E' (but it is swapped around so 'E2'). Note sure if I am trying to convince myself or the data is rubbish.

[FromTheCockpit]

Better in nibble setting. I can see '2E' repeated a few times.

[LinkMTech]

My bad, change the Read statement:

I2CREAD SDA,SCL,ADDR,[VALUE] ',Fail

[FromTheCockpit]

Still getting the same with the following code:

Value Var 	BYTE
Addr	Var	byte
Loc 	Var	Byte
'---------------------------------------------------------
Pause 500
	DEBUG "Start......",13,10
Value=0
Loc=0

Main:
High Led : Pause 500: Low Led : PAUSE 500
	Addr=$36
	I2CWRITE SDA,SCL,ADDR,[LOC],Fail1
	Addr=$37 : pause 10 ' Sometimes it is failing, leaving pause 10 makes it better.
	I2CREAD SDA,SCL,ADDR,[VALUE] ,Fail2
	PAUSE 25
	DEBUG  Value,13,10
	PAUSE 250
	DEBUG "Done....",13,10
WHILE 1 : WEND
Goto Main

Fail1:
while 1:	toggle portc.2 : pause 50 : wend 
goto main

Fail2:
WHILE 1
	High Portc.2 : Pause 250 : Low PortC.2 : Pause 250
WEND

[LinkMTech]

What if you assign the Read/Write addresses before hand?

Value Var 	BYTE
Addr	Var	byte
Loc 	Var	Byte

'---------------------------------------------------------
Pause 500
	DEBUG "Start......",13,10
Value=0
Loc=0
WR_Add CON $36
RD_Add CON $37

Main:
High Led : Pause 500: Low Led : PAUSE 500
	'Addr=$36
	I2CWRITE SDA,SCL,WR_Add,[LOC],Fail1
	'Addr=$37 : pause 10 ' Sometimes it is failing, leaving pause 10 makes it better.
	I2CREAD SDA,SCL,RD_Add,[VALUE] ,Fail2
	PAUSE 25
	DEBUG  Value,13,10
	PAUSE 250
	DEBUG "Done....",13,10
WHILE 1 : WEND
Goto Main

Fail1:
while 1:	toggle portc.2 : pause 50 : wend 
goto main

Fail2:
WHILE 1
	High Portc.2 : Pause 250 : Low PortC.2 : Pause 250
WEND

Question: Where is the "1" monitored at in these statements? Never seen it done this way before.

WHILE 1: WEND