SEROUT,HSEROUT or DEBUG ? max 232 or no max232 ?

[Dennis]

I currently have my PC's serial port ready to send and receive to the PIC 18F4520....
I have a max232n connected and have connected the pic to the correct pins on the max232n.
I would like to receive the data in hyperterminal.
BUT would also like to experiment with HSEROUT and DEBUG etc

SO here are the questions.

Of the following choices SEROUT,HSEROUT or DEBUG which one do I choose
1.To communicate between two pics

2.From PC to PIC which one should I choose in the following instances
A.Without a max232n
B.With a max232n


3.From PIC to RF

4.From PIC to IR

For all the above when may I use the internal oscillator and when not ?

And lastly ....
Assuming the Port I would like to transmit/send the data out of is PORT C6
and the receiving port is PORT C 7,
would the line be something like

Loop:
SerOut PinNumber,T2400,DataOut
Pause 100 'Delay for Receive viewing
goto Loop

[mackrackit]

Of the following choices SEROUT,HSEROUT or DEBUG which one do I choose
1.To communicate between two pics

SEROUT,SEROUT2,HSEROUT

2.From PC to PIC which one should I choose in the following instances
A.Without a max232n
B.With a max232n

A.Without a max232n
SEROUT,SEROUT2,DEBUG
B.With a max232n
ANY

3.From PIC to RF

4.From PIC to IR

ANY

For all the above when may I use the internal oscillator and when not ?

Bauds 4800 and below most times

And lastly ....
Assuming the Port I would like to transmit/send the data out of is PORT C6
and the receiving port is PORT C 7,
would the line be something like

Loop:
SerOut PinNumber,T2400,DataOut
Pause 100 'Delay for Receive viewing
goto Loop

Looks OK

[Dennis]

Thanks a million DAVE

Now trying out SEROUT and it's working like a charm :-)

You answers have cleared up the confusion !

Once again THANK YOU

Keep well

kind regards

Dennis

[Dennis]

So far I have tested ..SEROUT,SEROUT2 and DEBUG

I just have an issue with somehow passing a variable around in my code it seems using SEROUT,SEROUT2 and DEBUG.

So far I can capture a keypress (thanks to mister e's matrix keypad routine and advice and tips from several others - thank you!)
The keypress from the keypad is stored in a variable called myvar.
I send myvar to the LCD using

lcdout dec myvar      'display keypress variable

and on the LCD the DECimal number lets say I press 1 on the keypad appears as ||1 and for the number 2 on keypad it appears as ||2 and so on.
If I change the code to convert myvar as BINary numbers like this

lcdout BIN myvar      'display keypress variable

then when I press the number 1 on the keypad I get ||1 on the LCD and then the keypad 2 shows as ||2 and so on.
NOW .....
If I use serout to send myvar to hyperterminal or MicroStudio serial port window like this

SerOut PORTC.6,T2400,["the key pressed is",myvar]

I just get "the key is pressed' followed by a windings kinda characters like smileys, blocks and so forth :-(

If I send a string with serout like this

SerOut PORTC.6,T2400,["the key pressed is"]

Then everytime I press a key I see "the key is pressed" appearing in hyperterminal.

Here is my code ....I would really appreciated if someone could point me towards finding a solution as ultimately I would like to TX the binary keypress to be RX for another PIC

'*************************************
'Keypress display on LCD and TX to wherever
'*************************************

'Ocsillator selections here
        OSCCON = $70            'Int CLK 8MHz
        OSCTUNE.6 = 1           'PLL 4x
        ADCON1= %00001111       '$0F = disable A/D converter
        cmcon   =   7 
        INTCON2.7 = 0     'switch pull-ups ON
'END of oscillator selections
  'timer/oscillator defines 
        DEFINE OSC 32            '4x 8MHz
'END of timer/oscillator defines

'Port IO directions and presets for port pins begin here
'TRISX = %76543210   << tris bit order numbering
'TRISA = %11111111       'All pins are outputs
'// Define port pins as inputs and outputs ...
        TRISA  = %00000000 'example only - TRISB = %00001111 ;Make B4-B7 outputs, B0-B3 inputs, 
        TRISB = %11111111  'for 4x4 keypad all input
        TRISC = %10000000
        TRISD = %00000000
        TRISE.0 = 0
        TRISE.1 = 0
        TRISE.2 = 0
'End of Port IO directions and presets for port pins begin here

                   
'variables begin here
        myvar var byte
        dataout var byte
'end of variables

'LCD defines begin here   
        DEFINE LCD_BITS 4 	'defines the number of data interface lines (4 or 8) 
        DEFINE LCD_DREG PORTD 	'defines the port where data lines are connected to
        DEFINE LCD_DBIT 4 	'defines the position of data lines for 4-bit interface (0 or 4)
        DEFINE LCD_RSREG PORTD 	'defines the port where RS line is connected to
        DEFINE LCD_RSBIT 2 	'defines the pin where RS line is connected to 
        DEFINE LCD_EREG PORTD 	'defines the port where E line is connected to 
        DEFINE LCD_EBIT 3 	'defines the pin where E line is connected 
        DEFINE LCD_RWREG 0 	'defines the port where R/W line is connected to (set to 0 if not used)
        DEFINE LCD_RWBIT 0 	'defines the pin where R/W line is connected to (set to 0 if not used)
        DEFINE LCD_COMMANDUS 2000 	'defines the delay after LCDOUT statement 
        DEFINE LCD_DATAUS 200 		'delay in micro seconds
'END of LCD DEFINES

'includes begin here
        INCLUDE "modedefs.bas"
        include "c:\pbp\samples\keypad.bas"
'end of includes

'Keypad code begins here
        DEFINE KEYPAD_ROW        4        ' 4 ROW keypad       
        DEFINE KEYPAD_ROW_PORT   PORTB    ' ROW port = PORTB
        DEFINE KEYPAD_ROW_BIT    0        ' ROW0 = PORTB.4
        DEFINE KEYPAD_COL        4        ' 4 COL keypad
        DEFINE KEYPAD_COL_PORT   PORTB    ' COL port = PORTB
        DEFINE KEYPAD_COL_BIT    4        ' COL0 = PORTB.0
        DEFINE KEYPAD_DEBOUNCEMS 200      ' debounce delay = 200 mSec
        DEFINE KEYPAD_AUTOREPEAT 1        ' use auto-repeat feature
'end keypad code

'Main code begins here       

        Pause 2000       ' Wait for LCD to startup
start:
        'read keypress variable 
        @ READKEYPAD _myvar 

        lcdout $fe, 1        'clear lcd screen
         
        lcdout BIN myvar      'display keypress variable
        SerOut PORTC.6,T2400,["the key pressed is",myvar] 'SerOut PinNumber2,T2400,DataRec
        pause 1000
        lcdout $fe,1          'clear lcd screen
goto start

'End of all code

Thank you

Kind regards
Dennis

[mackrackit]

Try
N2400

[Gusse]

Dennis,

Have you read this?
Communications Example : PC to PIC bi-directional dialogue

Thanks to Melanie! This helped me a lot when I did code, which communicated with PC.


BR,
-Gusse-

Edit 1: I have used baud rate up to 38400 very successful. It might work even higher data rate (haven't try so far).
Edit 2: Running on 16F876A with 10MHz crystal, haven't tested with PIC that has internal oscillator. 1k5 resistors between PC and PIC (TX & RX).

[Dennis]

Will definitely check it out and do the suggested tests :-)
Thank you

[RobertDW]

Hi Dennis I'm brand new to the forum.
I see your question about the usage of max232 is my question as well, I have built an interface with a Wi-Fi chip and asked them if I needed the MAX232 chip to stabilise the signal quality using the picbasic "SEROUT" function and showed them an oscilloscope image of the signal produced and they were very busy and answered with "device connect to Wi-Fi is RS232 interface, the MAX232 chip is needed but not if UART".Did you find out if the process is RS232 or UART ?

[mackrackit]

You replied to a seven year old thread... It would be best to start a new thread.

When you start the new thread be sure to include the PIC you are using along with the WIFI module you are using. Without knowing this we would just be guessing about the best solution for you.

[ardhuru]

Hi,

Can I assume your wifi device is a variation of the ESP8266? If so, you would NOT require a MAX chip between the PIC and the Wifi module. Serout, Hserout should work, as also debug (the last in mode 0).

Only thing to remember is the Wifi module, depending on the version you have might not be 5 volt tolerant.

Regards,

Anand Dhuru

[RobertDW]

Hello ardhuru,
I took mackrackit's advice and moved my quiry to http://www.picbasic.co.uk/forum/showthread.php?t=22510
cheers