Instant Interrupts and HSERIN

[Rob]

Hi,

I've been struggling with this for around a week so I thought I'd check here to see if anyone's got any pointers.

I am collecting some data sent once per minute serially at 9600 baud. A startbyte is sent as $FD followed by 6 bytes representing SS:MM:HH DD:MM:YY

The following code works right at the start of my program

hserin [wait ($FD), str databyte\6]

but implementing Darrel's Instant Interrupts and the RX_INT I only seem to capture 2 of the bytes of data being the MM and HH so if write:

@   INT_DISABLE  RX_INT                                ; Disable RX Interrupt 
hserin 100,timeout [databyte(1), databyte(2)]
@   INT_ENABLE  RX_INT                                 ; Enable RX Interrupt
@   INT_RETURN

where timeout just re-enables the RX_INT and then returns. I would have expected the above snippet to save the $FD and then the SS data packet so I'm not sure why it skips these two and saves the MM and HH data bytes


If I try to capture more than two bytes:

hserin 100,timeout, [databyte(1), databyte(2), databyte(3)]

the hserin just jumps to timeout every time. I am ONLY enabling RX_INT at the moment so that I could eliminate interference by any other Interrupt but this has made no difference.

Any help would be greatly appreciated

Thanks in advance

Rob