USBSERVICE + serout2 problem

[aberco]

Trying to implement a "console like" behavior but cannot get it to work.

I'm using RX_Ready to read USB and then entering the desired reaction regarding the received command. However it seems that after doing an USBIn command, RX_Ready does not stay = 0 for very long, even if absolutely no data is received.

Is RX_Ready indicating a capacity to receive data (buffer not full), just like TX_Ready? In that case I cannot use this to trigger an event upon packet receive...

To better explain it here is some very dirty code.

MainLoop:

ARRAYWRITE USBBuffer, [">"]
GOSUB DoUSBOut

GOSUB DoUSBIn

SELECT CASE USBBuffer [0]
    CASE "A", "a"
        GOSUB  EchoData
        ARRAYWRITE USBBuffer, ["OK", 10, 13]
        Gosub DoUSBOut
    CASE ELSE
        GosuB EchoData
        ARRAYWRITE USBBuffer, ["Error", 10, 13]
        GOSUB DoUSBOut
END SELECT

PAUSE 1000

GOTO MainLoop

'*******************************************************
'Echo sent frame back
'*******************************************************
EchoData:

GOSUB DoUSBOut
ARRAYWRITE USBBuffer, [10, 13]
GOSUB DoUSBOut

RETURN

I'm confused yet about very simple things, like how to clear the buffer between requests. Also here it is polled every seconds, because I do not know how to trigger the event upon packet received... Tried to look for helpful examples without any luck.