When I invoke sdcc with a global static variable in my firmware like this:
xdata unsigned char buf[10];
It works and I can use the buffer.
When I change the buffer to instead have allocated data like this:
xdata unsigned char buf[] = {
0xXX, 0xYY, 0xZZ etc };
The firmware doesn't run.
Here is what I'm changing in my c code:
xdata BYTE serial_iic[5];
is changed to:
xdata BYTE serial_iic[] = {
0xc2, 0xb4, 0x04, 0x82, 0x00
};
Here is a diff between a working and non_working example asm files
output by sdcc.
--- eeprom.asm 2008-10-20 16:44:36.000000000 -0600
+++ eeprom.asm_broken 2008-10-20 16:25:09.000000000 -0600
@@ -777,8 +777,6 @@
_D4OFF = 0xa000
_D5ON = 0xb800
_D5OFF = 0xb000
-_serial_iic::
- .ds 5
;--------------------------------------------------------
; absolute external ram data
;--------------------------------------------------------
@@ -787,6 +785,8 @@
; external initialized ram data
;--------------------------------------------------------
.area XISEG (XDATA)
+_serial_iic::
+ .ds 5
.area HOME (CODE)
.area GSINIT0 (CODE)
.area GSINIT1 (CODE)
@@ -1096,4 +1096,10 @@
.db 0x0A
.db 0x00
.area XINIT (CODE)
+__xinit__serial_iic:
+ .db #0xC2
+ .db #0xB4
+ .db #0x04
+ .db #0x82
+ .db #0x00
.area CABS (ABS,CODE)
It seems to me that the addition of the __xinit_serial_iic label causes
things to break. Any thoughts?
Thanks
Dennis
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