As I've told you before, if you think there is something odd about the
generated assembly code, no one can give you more than very general
guesses unless you post a minimal compilable code snippet.
At first glance, I agree with Eric - I think you probably have a mixup
between word addresses and byte addresses and the generated code is
correct (i.e., the call is to *byte* address 0x62c, while the lcd_init
routine is at *word* address 0x62c). gcc likes to think in terms of
byte addresses, while avr studio (I'm guessing that's what you are
using) will probably show things in flash with word addresses.
As well as the assembly files listing suggested by Eric, generate a map
file and look at that - it might give you a clue.
mvh.,
David
David VanHorn wrote:
I'm probably doing something wrong again..
I've seen this on and off, as I'm stepping through the compiled code in
the asm window.
I will have a call that makes no sense to me, sort of randomly appearing
as I change the code, and dissapearing for no obvious reason. It's
always to the lcd_init routine, even though this code has nothing to do
with the LCD...
Below is where it's currently happening.
This SHOULD just load BIN with a value between 0 and 31.
It has to pull data from Raw_Data[0] according to the value of
Raw_Data_Index which will be between 0 and 511. Raw_Samples is 512,
and Sample_Bins is 32.
1051: Bin = (Raw_Data[0][Raw_Data_Index]) / (Raw_Samples /
Sample_Bins); // Find the bin for the old raw data
+0000031B: 90C00076 LDS R12,0x0076 Load direct from data
space
+0000031D: 90D00077 LDS R13,0x0077 Load direct from data
space
+0000031F: 01F6 MOVW R30,R12 Copy register pair
+00000320: 53EC SUBI R30,0x3C Subtract immediate
+00000321: 4FFF SBCI R31,0xFF Subtract immediate
with carry
+00000322: 8180 LDD R24,Z+0 Load indirect with
displacement
+00000323: E06F LDI R22,0x0F Load immediate
+00000324: 940E062C CALL 0x0000062C Call subroutine
+00000326: 2FA8 MOV R26,R24 Copy register
+00000327: E0B0 LDI R27,0x00 Load immediate
I don't understand why it's calling the LCD routine..
609: }/* lcd_init */
+0000062C: 1B99 SUB R25,R25 Subtract without carry
+0000062D: E079 LDI R23,0x09 Load immediate
+0000062E: C004 RJMP PC+0x0005 Relative jump
+0000062F: 1F99 ROL R25 Rotate Left Through Carry
+00000630: 1796 CP R25,R22 Compare
+00000631: F008 BRCS PC+0x02 Branch if carry set
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