implement something to point a memory mapped device

[GoogleCodeExporter]

I'd like to use picoC on an embedded board (mc68000) without any OS

so if picoC is part of the "firmware" then it should be nice to directly
point a "memory mapped device"

if the "memory-mapped device" is located at 0x8000, you can access it using
 something like the following

#define device_addr 0x8000
#define pdevice_bytetype volatile unsigned char
pdevice_bytetype xdata *pdevice_byte = (char xdata *) device_addr;

u-mmm may be it could be simplified without any CASTING

pdevice_bytetype xdata *pdevice_byte = device_addr;

device_addr is a "native pointer" that access directly the address pointed!

could you implement this feature ?

Original issue reported on code.google.com by flameman...@gmail.com on 14 Sep 2009 at 8:41

[GoogleCodeExporter]

Have a look at the NATIVE_POINTERS option. It's an experimental feature which 
may do
exactly what you want.

Original comment by zik.sale...@gmail.com on 4 Oct 2009 at 3:20

• Changed state: WontFix

[GoogleCodeExporter]

the problem is how to tell picoC to setup a pointer: it needs something to 
interpret this

pdevice_bytetype xdata *pdevice_byte = (char xdata *) device_addr;

how to do do ? 

Original comment by flameman...@gmail.com on 6 Oct 2009 at 3:23

[GoogleCodeExporter]

Another user has reported a bug in native pointers. See bug #54.

Original comment by zik.sale...@gmail.com on 6 Oct 2009 at 7:55

[GoogleCodeExporter]

See bug #54 is similar to the bug i pointed out
picoC is bugged about
1) char byte addressing
2) endianess (issues with bigendian machines)

ok, but what i am asking here is: could you implement something to handle 
pointer
assignment ? could you show how ?

i'd like to invoke picoC and see it pretty able to understand

pdevice_bytetype xdata *pdevice_byte = (char xdata *) device_addr;

Original comment by flameman...@gmail.com on 6 Oct 2009 at 8:17