[avr-gcc-list] Wierd Calls.

[David VanHorn]

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

--
David VanHorn
Hardware Engineer
MobileFusion, Inc
2715 Sarah St
Pittsburgh PA, 15203
Phone: (001) 412-481-1111
Cell: (001) 765-215-8521
Fax: (001) 412-481-0220
address@hidden
www.mobilefusioninc.com

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