I need help on ADC interrupt

[tacbanon]

Hi macrackit,
Sorry for that my mistake...here is the whole code, I'm using Pic16F877A with 20mhz crystal

clear
INCLUDE "MODEDEFS.BAS"       ' Include Shiftin/out modes


pause 4000 


'@ DEVICE HS_OSC
DEFINE   OSC 20
Define ADC_BITS     8   ' Set number of bits in result
Define ADC_CLOCK    3   ' Set clock source (3=rc)
Define ADC_SAMPLEUS 50  ' Set sampling time in uS


adval1 Var Byte          ' Create adval to store result
adval2 Var Byte
adval3 Var Byte


TRISA = 111111    ' Set PORTA to all input
ADCON1 = 000010   ' Set PORTA analog


        
TRISC  = 000000    ' PORTC.7 is the RX input, PORTC.6 is the TX output
TRISD  = 000000    
led0       var     PORTD.0
led1       var     PORTD.1
 ' The following codes is for bluetooth------------------------------------------------------------------------------------
 SerOut2 PortC.6,84, [$02,$52,$27,$06,$00,$7F,$12,$13,$23,$17,$09,$00,$03]
 pause 200
 SerOut2 PortC.6,84, [$02,$52,$66,$00,$00,$B8,$03]
 pause 200
 Serout2 PortC.6,84, [$02,$52,$04,$11,$00,$67,$10,$4D,$49,$43,$52,$4F,$42,$4F,$58,$42,$54,$31,$20,$20,$20,$20,$00,$03]
 '-------------------------------------------------------------------------------------------------------------------------
 RX var byte ' Receive byte




mainloop:
   ADCIN 0, adval1       ' Read channel 0 to adval1
   ADCIN 1, adval2       ' Read channel 1 to adval2
   
   pause 20
   Pause 100            ' Wait .1 second
   if adval1 >25 then
   SerOut2 PortC.6,84, ["1"]    ' sends 1 to Bluetooth TX
   Serout PortD.2,T9600, [$1B,$45,"[1] ",#adval1]   ' Displays to serial LCD for debugging
   Pause 100
   Endif 
   if adval2 >25 then
   SerOut2 PortC.6,84, ["2"]   ' sends 2 to Bluetooth TX
   Serout PortD.2,T9600, [$1B,$45,"[2] ",#adval2]   ' Displays to serial LCD for debugging
   Pause 100
   Endif 
  
   Goto mainloop        ' Do it forever

My problem is how to receive incoming data from bluetooth with SERIN without freezing the application..

regards,
tacbanon

[tacbanon]

I'm trying to play with this code from Mister_e, but my trouble is I can not send message to PC at the same time(Sending Hello and reading from analog pin). I hope anyone can give a hint on this.

    '
    '   Simple program to handle USART interrupt using PIC16F877 @20MHZ
    '   ===============================================================
    '
    '   This program will Blink a LED on PORTB.0 to show
    '   that the PIC is running.  
    '
    '   This program also allow the user to activate or deactivate 
    '   a LED connected on PORTB.1 pin by sending command from a PC
    '   terminal software using 9600,n,8,1 setting
    '
    '   User command:
    '   =============
    '                1. If character "1" is received => enable the LED1
    '                2. if character "2" is received => disable the LED1
    '                3. If character "3" is received => enable the LED2
    '                4. if character "4" is received => disable the LED2
    '
    '
    'DEFINE LOADER_USED 1        ' using bootloader
    Include "modedefs.bas"
    DEFINE OSC 20               ' running at 20 MHZ
    
    '    PORT setting
    '    ============
         '
         TRISC=%10000000        ' RC.7 => USART RX pin set to input
                                ' all other pin set to output
                                '
         TRISB=0                ' RB<7:0> set to output
    
    '    USART setting
    '    =============
         ' Since we will not use HSERIN/HSEROUT, we must
         ' write directly to internal PIC register
         ' 
         TXSTA=$24              ' enable transmit and SPBRGH=1
         RCSTA=$90              ' Enable USART and continuous receive
         SPBRG=129           ' BAUD RATE = 9600 BAUDS
   
    '    Interrupt definition
    '    ====================
         '
         PIE1.5   =1            ' enable USART receive interrupt
         INTCON.6 =1            ' enable peripheral interrupt
    
    '    Alias definition
    '    ================
         '
         RCIF      var PIR1.5   ' receiver interrupt
         StatusLED var PORTB.0  ' the LED who show a 'running process'
         UserLED1   var PORTB.1  ' the LED1 that user want to control
         UserLED2   var PORTB.2  ' the LED2 that user want to control
         UserLED3   var PORTB.3  ' the LED3 that user want to control
         UserLED4   var PORTB.4  ' the LED4 that user want to control
         
    '    Variable definition
    '    ===================
         '
         Delay     var word     ' 
         DataIn    var byte     ' use to store RCREG content
         Discard   var byte     ' use to erase RCREG register
        
    '    Hardware/software initialisation
    '    ================================
         '
         PORTB=0                ' clear PORTB         
         on interrupt goto USARTInterrupt
 '------------------------------------------------------------------------------
DEFINE ADC_BITS 8       ' Set A/D for 8-bit operation
DEFINE ADC_CLOCK 1      ' Set A/D clock Fosc/8
DEFINE ADC_SAMPLEUS 50  ' Set A/D sampling time @ 50 uS


adval Var Byte          ' Create adval to store result
TRISA = %11111111    ' Set PORTA to all input
'ADCON1 = %00000011  ' Set PORTA.0,1,2,5 = A/D, PortA.3 = +Vref
ADCON1 = %00000010   ' Set PORTA analog


pause 500
        
Start:
    '    Main program loop that make the user happy to
    '    see a LED flashing to mean that something is 
    '    running 
    '
    Serout2 PortC.6, 84,["Hello",13]
    toggle statusled
    'for delay = 1 to 5000       ' use a loop delay to ensure
      'pauseus 5                 ' getting interrupt as fast as possible
      'next 
    ADCIN 0, adval
    Serout2 PORTC.6, 84, ["Value: ", DEC adval, 13, 10] ' Display value
    pause 100
                      
    goto start
    


disable interrupt
USARTInterrupt:
    '    Here's the interrupt routine who will make the user
    '    much happy by giving him the feeling to have the 
    '    control on the machine when the status of the user
    '    LED will change
    '
    RCSTA=0                     ' Disable serial port AND
                                ' clear possible error (FERR,OERR)
                                
    datain=RCREG                ' Get data
                                
    while RCif                  ' wait untill the RCREG is empty
          discard=RCREG         ' by reading it and store result in a
    wend                        ' don't care variable
                                
    select case datain          ' What to do with that data???
                                
           case "1"            ' User selection = 1
                userled1=1       '      => Enable the LED
                                
           case "2"           ' User selection =2
                userled1=0       '      => disable the LED
                
           case "3"            ' User selection = 3
                userled2=1       '      => Enable the LED
                                
           case "4"           ' User selection =4
                userled2=0       '      => disable the LED
           
           case "5"            ' User selection = 3
                userled3=1       '      => Enable the LED
                                
           case "6"           ' User selection =4
                userled3=0       '      => disable the LED
           
           case "7"            ' User selection = 3
                userled4=1       '      => Enable the LED
                                
           case "8"           ' User selection =4
                userled4=0       '      => disable the LED
                                
           end select           
    RCSTA=$90                   ' Re-enable the serial PORT AND
    resume                      ' get out of here
enable interrupt

Hardware: Pic16F877A at 20Mhz crystal

regards,
tacbanon

[tacbanon]

I managed to send message to PC and added sensor reading(working in a separate program), but now I have strange reading on my temperature and light sensors. kindly check my code.

 'DEFINE LOADER_USED 1        ' using bootloader
    Include "modedefs.bas"
    DEFINE OSC 20               ' running at 20 MHZ
    
    '    PORT setting
    '    ============
         '
         TRISC=%10000000        ' RC.7 => USART RX pin set to input
                                ' all other pin set to output
                                '
         TRISB=0                ' RB<7:0> set to output
    
    '    USART setting
    '    =============
         ' Since we will not use HSERIN/HSEROUT, we must
         ' write directly to internal PIC register
         ' 
         TXSTA=$24              ' enable transmit and SPBRGH=1
         RCSTA=$90              ' Enable USART and continuous receive
         SPBRG=129           ' BAUD RATE = 9600 BAUDS
   
    '    Interrupt definition
    '    ====================
         '
         PIE1.5   =1            ' enable USART receive interrupt
         INTCON.6 =1            ' enable peripheral interrupt
    
    '    Alias definition
    '    ================
         '
         RCIF      var PIR1.5   ' receiver interrupt
         StatusLED var PORTB.0  ' the LED who show a 'running process'
         UserLED1   var PORTB.1  ' the LED1 that user want to control
         UserLED2   var PORTB.2  ' the LED2 that user want to control
         UserLED3   var PORTB.3  ' the LED3 that user want to control
         UserLED4   var PORTB.4  ' the LED4 that user want to control
         
    '    Variable definition
    '    ===================
         '
         Delay     var word     ' 
         DataIn    var byte     ' use to store RCREG content
         Discard   var byte     ' use to erase RCREG register
        
    '    Hardware/software initialisation
    '    ================================
         '
         PORTB=0                ' clear PORTB         
         on interrupt goto USARTInterrupt
 '------------------------------------------------------------------------------
DEFINE ADC_BITS 8       ' Set A/D for 8-bit operation
DEFINE ADC_CLOCK 1      ' Set A/D clock Fosc/8
DEFINE ADC_SAMPLEUS 50  ' Set A/D sampling time @ 50 uS


adval Var Byte          ' Create adval to store result
TRISA = %11111111    ' Set PORTA to all input
ADCON1 = %00000011  ' Set PORTA.0,1,2,5 = A/D, PortA.3 = +Vref
'ADCON1 = %00000010   ' Set PORTA analog
'--------Variables--------------------------------------------------------------
light var WORD
samples VAR WORD        ' Multiple A/D sample accumulator
sample  VAR BYTE        ' Holds number of samples to take
temp    VAR BYTE        ' Temperature storage
samples = 0             ' Clear samples accumulator on power-up


samples2 var word
sample2  VAR BYTE
samples2 = 0


pause 500
        
Start:
    '    Main program loop that make the user happy to
    '    see a LED flashing to mean that something is 
    '    running 
    '
    toggle statusled
    Pause 100
    FOR sample = 1 TO 20    ' Take 20 samples        
        ADCIN 1, temp       ' Read channel 0 into temp variable
        samples = samples + temp ' Accumulate 20 samples
        PAUSE 100           ' Wait approximately 1/4 seconds per loop
    NEXT sample
    temp = (samples/20)
    Hserout ["Temp=",DEC temp ,"'C" ,13] 
    
    ADCIN 0, light
    Hserout ["Light=",DEC light ,13]  
    goto start
    


disable interrupt
USARTInterrupt:
    '    Here's the interrupt routine who will make the user
    '    much happy by giving him the feeling to have the 
    '    control on the machine when the status of the user
    '    LED will change
    '
    RCSTA=0                     ' Disable serial port AND
                                ' clear possible error (FERR,OERR)
                                
    datain=RCREG                ' Get data
                                
    while RCif                  ' wait untill the RCREG is empty
          discard=RCREG         ' by reading it and store result in a
    wend                        ' don't care variable
                                
    select case datain          ' What to do with that data???
                                
           case "1"            ' User selection = 1
                userled1=1       '      => Enable the LED
                                
           case "2"           ' User selection =2
                userled1=0       '      => disable the LED
                
           case "3"            ' User selection = 3
                userled2=1       '      => Enable the LED
                                
           case "4"           ' User selection =4
                userled2=0       '      => disable the LED
           
           case "5"            ' User selection = 3
                userled3=1       '      => Enable the LED
                                
           case "6"           ' User selection =4
                userled3=0       '      => disable the LED
           
           case "7"            ' User selection = 3
                userled4=1       '      => Enable the LED
                                
           case "8"           ' User selection =4
                userled4=0       '      => disable the LED
                                
           end select           
    RCSTA=$90                   ' Re-enable the serial PORT AND
    resume                      ' get out of here
enable interrupt

regards,
tacbanon

[tacbanon]

I finally got the code to work, the problem was faulty circuitry, sorry for not double checking on my part before posting...Thank God for this forum and everyone here who I believed to be my PICexperts(macrackit, Mr_e, DT, Skimask, Henrick just to name a few) heroes...
Merry Christmas everyone!!!!

regards,
Tacbanon