[Sdcc-user] beginners questions 1

[roelof 't H. <ro...@it...>]

Hi all,

I would like to use a bit in more than one C source file.
The bit is set in the first file and an action is done in
the second file depending on the status of the bit.
So I made a global.h file that includes the following line :

sbit at 0x20 timer0int;

Is this best way to do this ?

The 'volatile static bit timer0int;' line did not work, it seems
to me that the compiler defines multiple bits for the different
source (C) files that try to use it.

Second : If anybody is using interrupt driven serial communications
on a 8051 uC, could you please tell me if you get overruns on the
data sent out the uart. And if this is ok, what are the baudrate and
update frequency, the minimum time between two seperate transmissions ?
Is your code written in C (using the standard routine supplied with sdcc)
or assembler ?


Thanks for any info,



--
roelof 't Hooft
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