Serin serout problem

[lerameur]

Hello,
nice to see the site back up.

I am almost finish my little project now. I have diffculty sending mutliple item on serout and receiving them on another chip using serin. I think its the way i type the command, the program does compile , but do not work.;
here is the two codes of line:
Sending Pic:
serout2 portb.2, n2400, [encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE ]

Receiving Pic:
serin portB.3, n2400,[ encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE]

after that i want to make the thing wireless. I have been trying to make the qualifier work in the serin command with no luck. I think this is needed because I will need to send some premamble to the receiving chip before the data right ??

Ken

[skimask]

---------------------------------------------------------------
serout2 portb.2, n2400, [encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE ]
---------------------------------------------------------------


SEROUT, not SEROUT2. Check your PBP manual for the explanation.

[lerameur]

yes in fact I tried both and it do not work.
I think my problem might be in the receiving end. when I do an lcd out without the serin command, the LCDout works, as soon I add the serin command, I only see black squares on the LCDout. So I think the serin command is not good.
BUT if I just put

serin portB.3, n2400,[ encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE]

lcdout $FE,1
LCDOUT "datain: ", BIN 5
lcdout $FE,$C0, "datain2: ", bin encoded22.HighBYTE
Pause 500

is there something else I should be putting in for serin ?

k

[rhino]

You might have to provide some more of your code to troubleshoot and maybe a schematic. I believe what Skimask is referring to is SEROUT2 requires mode number instead of a mnemonic such as "n2400".

Mode is used to specify the baud rate and operating parameters of the
serial transfer. The low order 13 bits select the baud rate. Bit 13 selects
parity or no parity. Bit 14 selects inverted or true level. Bit 15 selects
whether it is driven or open.
The baud rate bits specify the bit time in microseconds - 20. To find the
value for a given baud rate, use the equation:
(1000000 / baud) - 20

t2400 = 396
n2400 = 16780

[lerameur]

By the way , the LCD is there basically to tell me what is goign on .
anyway , here is the complete program :
sending:

' Picbasic Pro program to read DS1820 1-wire temperature sensor
' and display temperature on LCD
' FOR SENDING SERIAL
INCLUDE "modedefs.bas"
DEFINE OSC 20 'use external 20mhz crystal

CMCON = 7 : ANSEL = 0 : ADCON1 = 7
' Define LCD pins
DEFINE LCD_DREG PORTA ' Set LCD Data port
DEFINE LCD_DBIT 0 ' Set starting Data bit (0 or 4) if 4-bit bus

DEFINE LCD_RSREG PORTB ' Set LCD Register Select port
DEFINE LCD_RSBIT 1 ' Set LCD Register Select bit

DEFINE LCD_EREG PORTB ' Set LCD Enable port
DEFINE LCD_EBIT 0 ' Set LCD Enable bit

DEFINE LCD_BITS 4 ' Set LCD bus size (4 or 8 bits)
DEFINE LCD_LINES 2 ' Set number of lines on LCD

TRISB.2 =0
TRISB.3 =1
DQ var PortB.4
temp var word
'27
temperature var word
count_remain var byte
count_per_c var byte
counter var byte
tempc var word
dataout var word
dataout2 var word
datain var word
array var word
encoded1 var word
encoded2 var word
encoded22 var word
encoded11 var word


loop:
owout DQ,1,[$cc]
owout DQ,0,[$44]
Pause 500
owout DQ,1,[$cc]
owout DQ,0,[$be]
owin DQ, 0, [temperature.LOwBYTE, temperature.Highbyte, Skip 4, count_remain, count_per_c]
'50
temperature = ((( temperature >> 1) *100)- 25) + (((count_per_c - count_remain) * 100) / count_per_c)
tempc = (((temperature *9) / 5)+3200)
dataout = temperature / 100
dataout2 = temperature

encoded1 =temperature.LowBYTE
encoded2 =temperature.HighBYTE

For counter=0 TO 7
IF encoded1.0[counter]=0 Then
encoded11.0[counter*2]=0
encoded11.0[counter*2+1]=1
Else
encoded11.0[counter*2]=1
encoded11.0[counter*2+1]=0
EndIF
Next counter

For counter=0 TO 7
IF encoded2.0[counter]=0 Then
encoded22.0[counter*2]=0
encoded22.0[counter*2+1]=1
Else
encoded22.0[counter*2]=1
encoded22.0[counter*2+1]=0
EndIF
Next counter
lcdout $FE,1
LCDOUT BIN temperature , ".", dec (temperature / 10)," ",$DF,"C"
lcdout $FE,$C0, bin encoded22.HighBYTE , ".", bin encoded2," ",$DF,"F"
serout portb.2, n2400, [encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE ]
goto loop

End


AND RECEIVING:
' Picbasic Pro program to read DS1820 1-wire temperature sensor
' and display temperature on LCD
' FOR Receiving SERIAL
INCLUDE "modedefs.bas"
DEFINE OSC 20 'use external 20mhz crystal

CMCON = 7 : ANSEL = 0 : ADCON1 = 7
' Define LCD pins
DEFINE LCD_DREG PORTA ' Set LCD Data port
DEFINE LCD_DBIT 0 ' Set starting Data bit (0 or 4) if 4-bit bus

DEFINE LCD_RSREG PORTB ' Set LCD Register Select port
DEFINE LCD_RSBIT 1 ' Set LCD Register Select bit

DEFINE LCD_EREG PORTB ' Set LCD Enable port
DEFINE LCD_EBIT 0 ' Set LCD Enable bit

DEFINE LCD_BITS 4 ' Set LCD bus size (4 or 8 bits)
DEFINE LCD_LINES 2 ' Set number of lines on LCD
'22
datain2 var word
datain var word
dataout var word
counter var byte
temperature var word
encoded1 var word
encoded2 var word
encoded11 var word
encoded22 var word

pause 500

loop:
'36
serin portB.3, n2400,[ encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE]

lcdout $FE,1
LCDOUT "datain: ", BIN 5
lcdout $FE,$C0, "datain2: ", bin encoded22.HighBYTE , ".", dec datain2," ",$DF,"C"
Pause 500

For counter=0 TO 7 'decoding
encoded1.0[counter]=encoded11.0[counter*2]
encoded2.0[counter]=encoded22.0[counter*2]
Next counter

temperature= encoded1 ' putting back together as the original temperature
For counter=0 TO 7
temperature.0[counter+8]=encoded2.0[counter+8]
Next counter

goto loop

End

[rhino]

If you're not using a Qualifier, I think you need to use Serin2. Maybe you can use it without the qualifier... I don't know.

SERIN Pin,Mode,{Timeout,Label,}{[Qual...],}{Item...}
‘ Wait until the character
serially on Pin1 and put
SERIN 1,N2400,[“A”],B0

....The list of data items to be received may be preceded by one or more
qualifiers enclosed within brackets. SERIN must receive these bytes in
exact order before receiving the data items.

SERIN2 DataPin{\FlowPin},Mode,{ParityLabel,}{Timeout,Labe l,}[Item...]
‘ Wait until the character “A” is received
serially on Pin1 and put next character into B0
SERIN2 1,16780,[WAIT(“A”),B0]

Either way, I'd try to send a qualifier down. Either the Serin format or as noted in the manual with Serin2.

[skimask]

AND RECEIVING:
.......................................
pause 500

lcdout $FE,1 - put this above your main loop, you don't need to 'home' the LCD, you already do that with $FE,$C0.

loop:
'36
serin portB.3, n2400,[ encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE]

LCDOUT "datain: ", BIN 5 ------------- ???? what's this for?

lcdout $FE,$C0, "datain2: ", bin encoded22.HighBYTE , ".", dec datain2," ",$DF,"C" ---------- where is datain2 getting set at?

Pause 500

For counter=0 TO 7 'decoding
encoded1.0[counter]=encoded11.0[counter*2]
encoded2.0[counter]=encoded22.0[counter*2]
Next counter

temperature= encoded1 ' putting back together as the original temperature
For counter=0 TO 7
temperature.0[counter+8]=encoded2.0[counter+8]
Next counter

goto loop

End

No LCD_RWREG or LCD_RWBIT defines in either transmit or receive sections.

Add:
DEFINE LCD_COMMANDUS 2500
DEFINE LCD_DATAUS 250
to both sections.

Increase initial pause to 1000 or higher as needed.

Where is datain2 getting it's value from?

You don't do your decoding/etc until after you've displayed it. Change that around.

Check the listing above for other notes.

[lerameur]

LCDOUT "datain: ", BIN 5 ------------- ???? what's this for?
I was just testing my LCDout

lcdout $FE,$C0, "datain2: ", bin encoded22.HighBYTE , ".", dec datain2," ",$DF,"C" ---------- where is datain2 getting set at?
Past program , forgot to remove it, was just using the first line for LCDout


In the receiving chip, nothing is happening, its going in but not recognizing it.
This is the code I have, nothing is going to the lcd screen. If I remove the SERIN line, then the LCDOUT work, but gives me all 1. (thats normal its not seeing anything)
How do i output this on the lcd ?
It seems that i cannot use the command SERIN and LCDOUT in the same program...


serin portB.2, n2400,[ encoded22.HighBYTE, encoded22.LowBYTE, encoded11.HighBYTE, encoded11.LowBYTE]

LCDOUT "d: ", BIN encoded22.HighBYTE ,".",bin encoded22.LowBYTE ---------------------not outputting what i want
lcdout $FE,$C0, "datain2: ", bin encoded22.HighBYTE , ".", bin encoded22.HighBYTE," ",$DF,"C"
Pause 500