Serin serout problem

[lerameur]

ok , I'm back, still no changes,
picture up
The two leds there are from a previous program which instead of using lcdout, I was trying to make led blink.
but the picture was takien while your last program was working

[lerameur]

i tried this program for the reciver. The led blinks, If I added the serin , led would sit on high. There is definately a problem with serin command, It does not work with lcdout or simple led blinking

'RECEIVE PIC

INCLUDE "modedefs.bas"
DEFINE OSC 20 'use external 20mhz crystal
CMCON = 7 : ANSEL = 0 : ADCON1 = 7
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
DEFINE LCD_COMMANDUS 2500
DEFINE LCD_DATAUS 250

'try1 = count of times waiting for data, try2 = count of bytes received
try1 var byte : try2 var byte : temp var word : tempf var word
temp1 var byte : temp2 var byte : temp3 var byte : temp4 var byte
input portb.2 : pause 2500
try1 = 0 : try2 = 0
trisb=%00000000
loop:
lcdout $fe , $c0 , "Waiting.." , DEC3 try1 , "," , DEC3 try2
try1 = try1 + 1 : temp = 0 : tempf = 0
'serin portB.2 , t2400 , [ temp1 , temp2 , temp3 , temp4 ]
Portb.4 =1 : pause 500 : portb.4=0
Portb.3 =1 : pause 500 : portb.3=0
goto loop
End


I also wanted to see if the chip was able to see the data coming in, so i tried this loop, and nothing is happening to the led:

loop:
serin portB.2 , t2400 , [ temp1 , temp2 , temp3 , temp4 ]
if temp1 > 0 then
Portb.4 =1 : pause 500 : portb.4=0
Portb.3 =1 : pause 500 : portb.3=0
endif

goto loop
End

[lerameur]

Ok now I used your pogram and changed the serin line :

serin portB.2 , t2400 , temp1 -----works

It takes in the value,IT is NOW working. BUT For some odd reason it do not take multiple input..

serin portB.2 , t2400 , [ temp1 , temp2 , temp3 , temp4 ] ------------- do not work

[Archangel]

Ok now I used your pogram and changed the serin line :

serin portB.2 , t2400 , temp1 -----works

It takes in the value,IT is NOW working. BUT For some odd reason it do not take multiple input..

serin portB.2 , t2400 , [ temp1 , temp2 , temp3 , temp4 ] ------------- do not work

Hi leramuer.
I think you need to store and retrieve those values in an array. I am not experienced enough to have confidence with this statement, but methinks it is so.
Anyone, ring in here with an opinion!
JS
edit:
try this
Temp var byte[4]
Temp[0] = n ' your first temp value
Temp[1] = n1 ' your second value
Temp[2] = n2 ' your third value
Temp[3] = n3 ' your fourth value
serout portB.2 , t2400,[# temp[0],# temp[1], # Temp[2], # Temp[3]]
it displays on my backpack display.
JS

[lerameur]

Merry Christmas to all

I just tried that , the information is not sending. Maybe I got the code wrong, but it till skipping over the lcdout

k

[skimask]

Ok now I used your pogram and changed the serin line :

serin portB.2 , t2400 , temp1 -----works

It takes in the value,IT is NOW working. BUT For some odd reason it do not take multiple input..

serin portB.2 , t2400 , [ temp1 , temp2 , temp3 , temp4 ] ------------- do not work

Ok, I'm back. In the last program I posted, I had the values hardcoded in the transmitter side, so since they displayed correctly, now try a couple of dummy values hardcoded in the receiver side. Try out these programs and let me know what happens....

Things I changed since the last programs posted a couple of days ago:

Removed the hardcoded '444' and '888' on the transmitter side

Added a hardcoded '444' and '888' on the receiver side.

On both the transmit and receive side, I split the serout and serin into 4 seperate lines, each sending (or receiving) one byte. I don't know if this will fix the problem or not.

I also added a couple of lines in there to 'sync' up the transmit and receive sides in the case that the receive side starts receiving in the middle of a transmission (which could happen). Very simple setup - 6 bytes are sent, 1st byte - $aa , 2nd-3rd-tempC, 4th-5th-tempF, 6th byte-$55. 1st and 6th byte should add up to $FF. If it doesn't, it was received in the wrong order is values are thrown out. (actually, the 2 numbers from the transmit side could be any pair, as long as they add up to $ff, the receiver will take it, which could mess up the values at the receiver if the right temperature combination comes along, but we'll stay with this for now)

If the receive side shows '444' and '888', remove the lines and comments, and try it again. It just might work...

Of course then again, over the past couple of days, you might've gotten it fixed, which would be a sweet deal overall...

Added a line to idle the transmit line high between characters. This might fix the whole problem...?(see next post)

'RECEIVE PIC

INCLUDE "modedefs.bas"
DEFINE OSC 20 'use external 20mhz crystal
CMCON = 7 : ANSEL = 0 : ADCON1 = 7
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
DEFINE LCD_COMMANDUS 2500
DEFINE LCD_DATAUS 250

'try1 = count of times waiting for data, try2 = count of bytes received
try1 var byte : try2 var byte : temp var word : tempf var word
temp1 var byte : temp2 var byte : temp3 var byte : temp4 var byte
leader var byte : trailer var byte
input portb.2 : pause 2500
try1 = 0 : try2 = 0

loop:
lcdout $fe , $c0 , "Waiting.." , DEC3 try1 , "," , DEC3 try2 : try1 = try1 + 1
temp = 0 : tempf = 0 : leader = 0 : trailer = 0 'clear out old values
temp1 = 0 : temp2 = 0 : temp3 = 0 : temp4 = 0 'clear out old values
serin portb.2 , t2400 , [ leader ] 'get leader byte
serin portb.2 , t2400 , [ temp1 ]:serin portb.2 , t2400 , [ temp2 ] 'get data
serin portb.2 , t2400 , [ temp3 ]:serin portb.2 , t2400 , [ temp4 ] 'get data
serin portb.2 , t2400 , [ trailer ] 'get trailer byte

'remove the line below if 444 and 888 show up on the LCD
temp1 = 1 : temp2 = 188 : temp3 = 3 : temp4 = 120
'remove the line above if 444 and 888 show up on the LCD

if ( leader + trailer ) <> $ff then 'if leader + trailer doesn't add up right...
lcdout $fe , $c0 , "No Sync..", DEC3 try1 , "," , DEC3 try2
pause 200 : goto loop 'try again
endif

temp.highbyte = temp1 : temp.lowbyte = temp2 'put the received values
tempf.highbyte = temp3 : tempf.lowbyte = temp4 'where they need to be
if temp + tempf > 0 then try2 = try2 + 1 'if temp+tempf are not 0 then data received
lcdout $fe , $c0 , "Received." , DEC3 try1 , "," , DEC3 try2 : pause 100
lcdout $fe , $c0 , "Display.." , DEC3 try1 , "," , DEC3 try2 : pause 100
lcdout $fe , $80 , "Tc=" , DEC3 temp , "C,Tf=" , DEC3 tempf , "FR" : pause 100
lcdout $fe , $c0 , "Shown...." , DEC3 try1 , "," , DEC3 try2 : pause 100
goto loop
End











'TRANSMIT PIC

INCLUDE "modedefs.bas"
DEFINE OSC 20 'use external 20mhz crystal
CMCON = 7 : ANSEL = 0 : ADCON1 = 7
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
DEFINE LCD_COMMANDUS 2500
DEFINE LCD_DATAUS 250
DEFINE CHAR_PACING 33333

try1 var byte : try2 var byte : output portb.2 : high portb.2 : input portb.3
dq var portb.4 : temp var word : tempf var word
temp1 var byte : temp2 var byte : temp3 var byte : temp4 var byte
pause 2500
try1 = 0 : try2 = 0

loop:
lcdout $fe , $c0 , "Getting.." , DEC3 try1 , "," , DEC3 try2 : try1 = try1 + 1
owout DQ , 1 , [ $cc ] : owout DQ , 0 , [ $44 ] : Pause 500
owout DQ , 1 , [ $cc ] : owout DQ , 0 , [ $be ]
owin DQ , 0 , [ temp.LOWBYTE , temp.HIGHBYTE , skip 6 ]
tempf = temp * 9 : tempf = tempf / 5 : tempf = tempf + 32
lcdout $fe , $c0 , "Display.." , DEC3 try1 , "," , DEC3 try2
lcdout $fe , $80 , "Tc=" , DEC3 temp , "C,Tf=" , DEC3 tempf , "FT"
lcdout $fe , $c0 , "Sending.." , DEC3 try1 , "," , DEC3 try2
high portb.2 : serout portb.2, t2400 , [ $aa ] 'send a leader byte
temp1 = temp.highbyte : temp2 = temp.lowbyte
high portb.2 : serout portb.2 , t2400 , [ temp1 ]
high portb.2 : serout portb.2 , t2400 , [ temp2 ] 'send data
temp3 = tempf.highbyte : temp4 = tempf.lowbyte
high portb.2 : serout portb.2 , t2400 , [ temp3 ]
high portb.2 : serout portb.2 , t2400 , [ temp4 ] 'send data
high portb.2 : serout portb.2 , t2400 , [ $ff ] 'send a trailer byte
high portb.2 : try2 = try2 + 4 : lcdout $fe , $c0 , "Sent....." , DEC3 try1 , "," , DEC3 try2
goto loop

[skimask]

Something else I just found...
http://www.picbasic.co.uk/forum/show...ght=idle+state

You might have to add a bit of code to manually toggle the pin before/after transmitting...not sure... I'll look into it more tomorrow. This may have been the problem I was having before (long time ago) when I switched over to using the actual PIC hardware serial modules.

[lerameur]

HI, NO I have not found the problem . I was about to order some pic16f648a, you told it worked with these chips.

I tried your program , the No sync appears at every increment,
so guess there is a problem with the trailer or leader bit.

k

[skimask]

HI, NO I have not found the problem . I was about to order some pic16f648a, you told it worked with these chips.

I tried your program , the No sync appears at every increment,
so guess there is a problem with the trailer or leader bit.

k

I wouldn't order any '648's or '628's, the 'F88 should be just fine.

What does the display read? Does it show the hardcoded 444 and 888? Did you try removing that? Also, get rid of the pauses in the receiver code, or at least drop them down a bit, cut them in half or so.

JUST SAW THIS: In the transmit code, the trailer byte should be a $55, not $ff. That'll probably fix it now. The fact that you said it shows 'No Sync' at 'EVERY INCREMENT' is the key thing, it shows that the loop is going thru the SERIN commands now.