Hi2cin

[cfarr]

I am testing the following code on the newly downloaded programming editor v. 5.1.4. When I run the code the simulator displays a syntax error on the first line. Am I doing something wrong? This program is intended to read the time from a DS1307.


hi2csetup i2cslave,%11010000,i2cslow,i2cbyte

main:
hi2cin 0,(b0,b1,b2)
bcdtoascii b0, b12,b13 : serout 6,N2400,(254,128,b12,b13,":&quot
bcdtoascii b1, b12,b13 : serout 6,N2400,(b12,b13,":&quot
bcdtoascii b2, b12,b13 : serout 6,N2400,(b12,b13," &quot
goto main

 

[MORA99]

Have you selected the extended editor syntax, and the correct chip in options ?

If you run the syntax check with the wrong chip selected it will give a error.


You can also use a #picaxe line in the start
like
#picaxe 28x1
#picaxe 14m
etc



Edited by - MORA99 on 15/07/2007 18:54:10

 

[cfarr]

Compiler is on enhanced mode and PICAXE 28X1 selected.

 

[MORA99]

I havent used hi2, but the datasheet says hi2setup with slave does not need the last 2 arguments.

These both passes syntax check
hi2csetup i2cmaster,%11010000,i2cslow,i2cbyte
hi2csetup i2cslave,%11010000

Edited by - MORA99 on 15/07/2007 18:59:33

 

[cfarr]

OK, I have removed the last two arguments and that passed the t

 

[MORA99]

Does it work?
I tried here with a 28x1 in simulate and it just locks up at the hi2in

 

[cfarr]

OK I have removed the last two arguments and that cleared the problem. However, the simulator than crashes on the hi2cin 0,(b0,b1,b2)line.

 

[cfarr]

For the time being, thanks for your help. I'll get to the problem later on because I have to leave now.

 

[Technical]

To use hi2cin from a slave chip (e.g. EEPROM or DS1307) you must set the PICAXE chip up as the 'master', not as another 'slave' device. This is because the PICAXE is controlling the bus.

You therefore need this type of syntax

hi2csetup i2cmaster,%1010000,i2cslow,i2cbyte

You only set the PICAXE as a slave when another device on the bus (e.g. another PICAXE) is acting as the master.

Edited by - Technical on 15/07/2007 21:38:24

 

[cfarr]

Thanks technical for your prompt reply. The code has been changed but the simulator still crashes on the hi2cin 0,(b0,b1,b2)line.

hi2csetup i2cmaster,%11010000,i2cslow,i2cbyte
main:
hi2cin 0,(b0,b1,b2)
bcdtoascii b0, b12,b13 : serout 6,N2400,(254,128,b12,b13,":&quot
bcdtoascii b1, b12,b13 : serout 6,N2400,(b12,b13,":&quot
bcdtoascii b2, b12,b13 : serout 6,N2400,(b12,b13," &quot
goto main

 

[krypton_john]

I get the same.

Should hi2cin just return $ff in the simulator?

 

[cfarr]

Actually I cannot test the code on a 28x1 as I have still to purchase this part. But before migrating to these new version Picaxes, I decided to get acquainted with the new commands using the simulator. Has anyone successfully used the hi2cin command with these devices?

 

[Technical]

There is a bug in the simulator for which we apologise, we will fix in next release. Real chip will work fine.

Under simulation there are options to 'simulate' EEPROM and RTC, so (when the simulator works) you can simulate these chips (ie the value will not be always $FF if these simulation options are enabled).

 

[MORA99]

I have tested this code today, and it works well on a 28x1 (not simulated).

<code><pre><font size=2 face='Courier'>
symbol seconds = b0
symbol mins = b1
symbol hour = b2
symbol day = b3
symbol date = b4
symbol month = b5
symbol year = b6
symbol control = b7

; Example of how to use DS1307 Time Clock
; Note the data is sent/received in BCD format.
; Note that seconds, mins etc are variables that need
; defining e.g. symbol seconds = b0 etc.
' set DS1307 slave address
hi2csetup i2cmaster, %11010000, i2cslow, i2cbyte
'write time and date e.g. to 11:59:00 on Thurs 25/12/03
start_clock:
let seconds = $00' 00 Note all BCD format
let mins = $27' 59 Note all BCD format
let hour = $23' 11 Note all BCD format
let day = $02' 03 Note all BCD format
let date = $16' 25 Note all BCD format
let month = $07' 12 Note all BCD format
let year = $07' 03 Note all BCD format
let control = %00010000 ' Enable output at 1Hz
hi2cout 0,(seconds,mins,hour,day,date,month,year,control)



SerTxd(&quot;Date set&quot;,CR,LF )



</font></pre></code>


<code><pre><font size=2 face='Courier'>
symbol seconds = b0
symbol mins = b1
symbol hour = b2
symbol day = b3
symbol date = b4
symbol month = b5
symbol year = b6
symbol control = b7

hi2csetup i2cmaster,%11010000,i2cslow,i2cbyte

main:
hi2cin 0,(seconds,mins,hour,day,date,month,year)

bcdtoascii date, b12,b13
SerTxd(b12,b13,&quot;/&quot

bcdtoascii month, b12,b13
SerTxd(b12,b13,&quot;-&quot

bcdtoascii year, b12,b13
SerTxd(&quot;20&quot;,b12,b13,&quot; &quot;,&quot; &quot

bcdtoascii hour, b12,b13
SerTxd(b12,b13,&quot;:&quot

bcdtoascii mins, b12,b13
SerTxd(b12,b13,&quot;:&quot

bcdtoascii seconds, b12,b13
SerTxd(b12,b13)

SerTxd(CR,LF )

pause 1000
goto main


</font></pre></code>

 

[cfarr]

OK, thanks for the feedback and the posted test code. I'll now try with the new 28X1 and 40X1.

Carmel