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Discuss the relationship between the C code and the Assembly code generated by the compiler. Especially focus on the difference between declaration of different types

Discuss the relationship between the C code and the Assembly code generated by the

compiler. Especially focus on the difference between declaration of different types of variables in assembly for example difference between the declaration of an integer variable and a character variable.

Task #2

C code:

9: #include /* common defines and macros */

10: #include "derivative.h" /* derivative-specific definitions */

11:

12:

13:

14: int i;

15: void main(void)

16: {

*** EVALUATION ***

Function: main

17: /* put your own code here */

18:

19: i=-100;

0000 ccff9c [2] LDD #65436

0003 7c0000 [3] STD i

20:

21:

22: }

0006 0a [7] RTC

23:

24:

Assembly:

*** EVALUATION ***

ANSI-C/cC++ Compiler for HC12 V-5.0.41 Build 10203, Jul 23 2010

1: //Toggling PORTB in C Language for Dragon12 Plus Trainer Board

2: //with HCS12 Serial Monitor Program installed. This code is for CodeWarrior IDE

3: //On Dragon12+ Trainer board 8 LEDs are connected to PORTB and

4: //PTJ1 is used to allow LEDs of PORTB to show the data (See Page 24 of Dragon12+ Doc)

5: //Modified from Example 7-7 of Mazidi & Causey HCS12 book

6: //Use F7 to Make, F5 (Debug) to download, and F5 (Start) to run the program

7: //Make sure you are in HCS12 Serial Monitor mode when downloading and running.

9: #include /* common defines and macros */

10: #include "derivative.h" /* derivative-specific definitions */

11:

12:

13:

14: int i;

15: void main(void)

16: {

*** EVALUATION ***

17: /* put your own code here */

18:

19: i=-100;

0000 ccff9c [2] LDD #65436

0003 7c0000 [3] STD i

20:

21:

22: }

0006 0a [7] RTC

23:

24:

Task #3

C code:

#include /* common defines and macros */

#include "derivative.h" /* derivative-specific definitions */

unsigned j;

void main(void)

{

j=25;

}

Assembly:

*** EVALUATION ***

ANSI-C/cC++ Compiler for HC12 V-5.0.41 Build 10203, Jul 23 2010

3: #include /* common defines and macros */

4: #include "derivative.h" /* derivative-specific definitions */

*** EVALUATION ***

Function: main

Source : C:\Users\ecelab\Desktop\Lab_02_Task_04\Sources\main.c

9: c='X';

0000 c658 [1] LDAB #88

0002 7b0000 [3] STAB c

10: }

0005 0a [7] RTC

11:

12:

Task #5

C code:

#include /* common defines and macros */

#include "derivati 5:

7: unsigned j;

8: void main(void)

9: {

*** EVALUATION ***

Function: main

Source : C:\Users\ecelab\Desktop\Project_22\Sources\main.c

10: j=25;

0000 c619 [1] LDAB #25

0002 87 [1] CLRA

0003 7c0000 [3] STD j

11: }

0006 0a [7] RTC

12:

13:

Task #4

C code:

#include /* common defines and macros */

#include "derivative.h" /* derivative-specific definitions */

char c;

void main(void)

{

c='X';

}

Assembly:

*** EVALUATION ***

ANSI-C/cC++ Compiler for HC12 V-5.0.41 Build 10203, Jul 23 2010

3: #include /* common defines and macros */

4: #include "derivative.h" /* derivative-specific definitions */

6: char c;

7: void main(void)

8: {

ve.h" /* derivative-specific definitions */

void main(void)

{

int iarr[10]={0,1,2,3,4,5,6,7,8,9

};

char carr[10]="abcdefghi";

}

Assembly:

*** EVALUATION ***

ANSI-C/cC++ Compiler for HC12 V-5.0.41 Build 10203, Jul 23 2010

3: #include /* common defines and macros */

4: #include "derivative.h" /* derivative-specific definitions */

8: void main(void)

9: {

*** EVALUATION ***

Function: main

Source : C:\Users\ecelab\Desktop\Lab02_Task_05\Sources\main.c

Options : -CPUHCS12 -D_HCS12_SERIALMON -D__NO_FLOAT__ -Env"GENPATH=C:\Users\ecelab\Desktop\Lab02_Task_05;C:\Users\ecelab\Desktop\Lab02_Task_05\bin;C:\Users\ecelab\Desktop\Lab02_Task_05\prm;C:\Users\ecelab\Desktop\Lab02_Task_05\cmd;C:\Users\ecelab\Desktop\Lab02_Task_05\Sources;C:\Program Files (x86)\Freescale\CWS12v5.1\lib\HC12c\lib;C:\Program Files (x86)\Freescale\CWS12v5.1\lib\HC12c\src;C:\Program Files (x86)\Freescale\CWS12v5.1\lib\HC12c\include" -Env"LIBPATH=C:\Program Files (x86)\Freescale\CWS12v5.1\lib\HC12c\include" -EnvOBJPATH=C:\Users\ecelab\Desktop\Lab02_Task_05\bin -EnvTEXTPATH=C:\Users\ecelab\Desktop\Lab02_Task_05\bin -Lasm=C:\Users\ecelab\Desktop\Lab02_Task_05\Lab02_Task_05_Data\Standard\ObjectCode\main.c.o.lst -Mb -ObjN=C:\Users\ecelab\Desktop\Lab02_Task_05\Lab02_Task_05_Data\Standard\ObjectCode\main.c.o -WmsgSd1106

0000 1bf1e2 [2] LEAS -30,SP

10: int iarr[10]={0,1,2,3,4,5,6,7,8,9

0003 c7 [1] CLRB

0004 87 [1] CLRA

0005 6c8a [2] STD 10,SP

0007 52 [1] INCB

0008 6c8c [2] STD 12,SP

000a 58 [1] LSLB

000b 6c8e [2] STD 14,SP

000d 52 [1] INCB

000e 6cf010 [3] STD 16,SP

0011 52 [1] INCB

0012 6cf012 [3] STD 18,SP

0015 52 [1] INCB

0016 6cf014 [3] STD 20,SP

0019 52 [1] INCB

001a 6cf016 [3] STD 22,SP

001d 52 [1] INCB

001e 6cf018 [3] STD 24,SP

0021 52 [1] INCB

0022 6cf01a [3] STD 26,SP

0025 52 [1] INCB

0026 6cf01c [3] STD 28,SP

11: };

12: char carr[10]="abcdefghi";

0029 c661 [1] LDAB #97

002b 6b80 [2] STAB 0,SP

002d 52 [1] INCB

002e 6b81 [2] STAB 1,SP

0030 52 [1] INCB

0031 6b82 [2] STAB 2,SP

0033 52 [1] INCB

0034 6b83 [2] STAB 3,SP

0036 52 [1] INCB

0037 6b84 [2] STAB 4,SP

0039 52 [1] INCB

003a 6b85 [2] STAB 5,SP

003c 52 [1] INCB

003d 6b86 [2] STAB 6,SP

003f 52 [1] INCB

0040 6b87 [2] STAB 7,SP

0042 52 [1] INCB

0043 6b88 [2] STAB 8,SP

0045 6a89 [2] STAA 9,SP

13:

14: }

0047 1bf01e [2] LEAS 30,SP

004a 0a [7] RTC

15:

16:

Task #6

C code:

//Toggling PORTB in C Language for Dragon12 Plus Trainer Board

//with HCS12 Serial Monitor Program installed. This code is for CodeWarrior IDE

//On Dragon12+ Trainer board 8 LEDs are connected to PORTB and

//PTJ1 is used to allow LEDs of PORTB to show the data (See Page 24 of Dragon12+ Doc)

//Modified from Example 7-7 of Mazidi & Causey HCS12 book

//Use F7 to Make, F5 (Debug) to download, and F5 (Start) to run the program

//Make sure you are in HCS12 Serial Monitor mode when downloading and running.

#include /* common defines and macros */

#include "derivative.h" /* derivative-specific definitions */

void MSDelay(unsigned int);

void main(void)

{

/* put your own code here */

DDRB = 0xFF; //PORTB as output since LEDs are connected to it

DDRJ = 0xFF; //PTJ as output to control Dragon12+ LEDs

PTJ=0x0; //Allow the LEDs to display data on PORTB pins

for(;;)

{

PORTB = 0x00;

MSDelay(500); //1/2 sec delay

PORTB = 0x01;

MSDelay(500);

PORTB = 0x03;

MSDelay(500);

PORTB = 0x07;

MSDelay(500);

PORTB = 0x0F;

MSDelay(500);

PORTB = 0x1F;

MSDelay(500);

PORTB = 0x3F;

MSDelay(500);

PORTB = 0x7F;

MSDelay(500);

PORTB = 0xFF;

MSDelay(500);

}

//millisecond delay for XTAL=8MHz, PLL=48MHz

//The HCS12 Serial Monitor is used to download and the program.

//Serial Monitor uses PLL=48MHz

void MSDelay(unsigned int itime)

{

unsigned int i; unsigned int j;

for(i=0;i

for(j=0;j<4000;j++); //1 msec. tested using Scope