Hmmm, I moved PIC #2 up in PIC #1 spot, and put in a new unit in PIC #2 spot.

PIC#1 can now disable transmitter at will, YAY! So that confirms that there's nothing on the breadboard interfering with that PIC.

New PIC #2 gets a framing error, but neither of the PICs freeze now (I put the blinky channel right under each PIC).

Name: Framing error g.png Views: 6450 Size: 44.9 KB


PIC#1:

Code:
Start:
    TXSTA.5 = 1                     ' TXEN: Transmit Enable bit
    hserout [   "[1]"    ]                             
    while TXSTA.1 = 0               ' Check TRMT: Transmit Shift Register Status bit
    wend
    TXSTA.5 = 0                     ' <----- Causes Framing error after last byte !

    hserin [ wait("["), STR RecvData\11\"]" ]

    TXSTA.5 = 1                     ' TXEN: Transmit Enable bit
    hserout [   "[2]"    ]                             
    while TXSTA.1 = 0               ' Check TRMT: Transmit Shift Register Status bit
    wend
    TXSTA.5 = 0                     ' <----- Causes Framing error after last byte !

Mainloop:
    BlinkLED = 1
    BlinkLED = 0
    GOTO Mainloop
end

PIC #2:

Code:
@   INT_ENABLE   RX_INT
    goto Start

ReceiveInterrupt:
    hserin [ wait("["), STR RecvData\11\"]" ]
    UsartFlag = 1
@ INT_RETURN

Start:

Mainloop:
    LEDblink = 1
    if UsartFlag = 1 then
        TXSTA.5 = 1
        hserout [   "[0]"  ]                            
        while TXSTA.1 = 0              ' Check TRMT bit
        wend
        UsartFlag = 0
        TXSTA.5 = 0
    endif
    LEDblink = 0
    GOTO Mainloop
end
Might have a few ideas more ideas to try out...