MIBAM and 12F1822...

[mister_e]

What happen if you Enable/Disable MIBAM within the IF/Then loop?

main:
    gosub do_adc 'get ADC reading
    pause 20
    
    ;T1CON.0 = 0 'disable mibam
    debug "ADC: ",dec4 adc_val,13,10
    pause 2
   ; T1CON.0 = 1 'enable mibam
    
    if adc_val > adc_thresh then 
        T1CON.0 = 1 'enable mibam
        FOR red = 255 to 1 STEP -1
                PAUSE Speed
        NEXT red
        red = 0
        
        FOR grn = 255 to 1 STEP -1
                PAUSE Speed
        NEXT grn
        grn = 0
        
        FOR BLU = 255 to 1 STEP -1
                PAUSE Speed
        NEXT BLu
        blu = 0
        T1CON.0 = 0 'disable mibam
    endif  
goto main

[alesniak]

I changed out the ANSELA line... not quite sure what is wrong with it.
(and removed the DEFINE ADC_BITS 10 line as well)

seemed correct looking at the datasheet.

I am using AN3 as my analog input which is RA4, the readings I am getting
with the debug output are correct (phototransistor reading light levels)

also tried to enable/disable MIBAM within the loop, now the led doesn't trigger at all, with the enable/disable just around the debug statment, it did work once or twice before stopping... very strange.

wondering if there is some other peripheral that needs to be disabled perhaps?
these new pics have pretty much everything multiplexed except the kitchen sink it seems.

[Darrel Taylor]

alesniak,

I am modifying MIBAM to work with the 16F1's.
They did not exist when I wrote it.

mister-E's modifications will not work, and I've deleted the attachment above.
I don't need non-working copies of MIBAM floating around the internet, since I'm the one that people will complain to.

I should have it by tomorrow.

[alesniak]

fantastic! thank you Darrel! looking forward to it..

[Darrel Taylor]

Ok, here's the modification of MIBAM for use with 16F1's.
It also works with 14-bit cores (12F, 16F) and 18F's.

I've tested it on 16F1827, 16F1947, 16F877A and 18F4550.
Sorry, I don't have a 12F1822.

One problem I spent a lot of time trying to figure out ended up being caused by the statements ...

T1CON.0 = 0 'disable mibam
T1CON.0 = 1 'enable mibam

I really thought that would work to stop interrupts from occuring during the DEBUG statements.
But it turns out that 1 interrupt can still happen after you stop the timer.
I have yet to understand how that happens, but it does.

If you use these statements instead ...

GIE = 0 'disable mibam
GIE = 1 'enable mibam

then no further interrupts occur to disturb the DEBUG's.
They are actions of the chips themselves, not MIBAM.

MIBAM seems stable at this point, but let me know if you have any problems.

[alesniak]

fantastic! thank you again... going to give this a try this evening and report back. (day job and stuff..)

question: is it going to be possible to use the hardware uart while mibam is running? eventually would like be able to receive serial commands, rgb data
to control led color.

[Darrel Taylor]

Sure, the USART will work fine with MIBAM.
Then you don't need to disable interrupts.

I don't think you can have the POT connected, since the USART will use 2 pins and the LED's use 3 pins.
There won't be an analog pin left. But since the serial data controls the LED's, you probably don't need the POT anymore.