"Tiny6410 Bare-Metal Program" Fifth: assembly and C-mixed programming-led racing Lights final description, myled again to streamline _ hardware-related

The RVDS CodeWarrior configuration is as follows:

Linker (link) settings

RealView Linker->output:

Linkertype Select Simple;simple image in the RO base fill 0x50200000, RW base fill 0x50203000.

RealView linker->options:

Image entry point fill 0x50200000.

RealView linker->layout:

Object/symbol fill in the Startup.o;section and fill in the start.

Other settings are no longer described.

One, the assembly code segment completes the work (primarily is the initialization stack)

Ro set to 0x5020 0138//ro segment, Code snippet end address (starting 0x5020 0000)

R1 set to 0x5020 0478//zi segment, uninitialized global variable segment end address

R2 set to 0x0000 0000//Initialize global variable

R3 set to 0x5020 0138//zi segment, uninitialized global variable segment start address

1.startup.s

; Start the file. Initialize the C program's operating environment, and then enter the C program code.; Import connector three-segment variable in a previously defined run domain; Arm executable image file by the Ro, RW, zi three sections; Ro for code snippets, RW for initialized global variables, Zi for uninitialized global variables Preserve8 IMPORT |  image$ $RO $ $Limit | ; RO segment End Address IMPORT |   image$ $RW $ $Base | ; RW section start Address IMPORT |   image$ $ZI $ $Base | ; Zi section start Address IMPORT |  image$ $ZI $ $Limit | ; Zi segment End Address IMPORT main; Declares the main () function area start,code,readonly in a C program; Declares the code snippet start ENTRY; Identification Program Entry CODE32; Statement 32-bit ARM instruction Usr_stack_legth EQU 128; Initialize the operating environment of the C program LDR r0,=|
	image$ $RO $ $Limit | LDR r1,=|	
	image$ $RW $ $Base | LDR r3,=|	
			
	image$ $ZI $ $Base | CMP r0,r1 BEQ LOOP1 LOOP0 cmp r1,r3 LDRCC r2,[r0], #4 STRCC r2,[r1], #4 BCC LOOP0 LOOP1 LDR 
	mage$ $ZI $ $Limit | MOV R2, #0 LOOP2 CMP r3,r1 STRCC r2,[r3], #4 BCC LOOP2, set system mode stack, SP/R13 register; MSR cpsr_c, #0xdf LDR SP, stackusr BL main; Jump to C program code main () function stackusr DCD usrstackspace + (usr_stack_legth-1) *4 area mystacks, DATA, Noinit, AL ign=2 Usrstackspace Space Usr_Stack_legth * 4; User (System) pattern stack space End

2.main.c

#define LED1_ON ~ (1<<4)//1111 1111 1111 1111 1111 1111 1110 1111 gpkdat31~gpkdat0 #define LED2_ON ~ (1<&lt 5) #define LED3_ON ~ (1<<6) #define LED4_ON ~ (1<<7) #define Led1_off (1<<4)//0000 0000 0000 00 0000 0000 0001 0000 #define LED2_OFF (1<<5) #define LED3_OFF (1<<6) #define Led4_off (1<<7) #de
Fine Ledall_off (0xf<<4)//0000 0000 0000 0000-0000-0000-1111 typedef 0000 long unsigned;
typedef unsigned short U16;


typedef unsigned char U8;

#define RGPIOKCON0 (* (volatile u32 *) 0x7f008800) #define RGPIOKDAT (* volatile u32 *) 0x7f008808) void delay (int times);
  int main (void) {u32 uconvalue;
  Uconvalue = rGPIOKCON0; Uconvalue &= ~ (0xffff<<16);    0000 0000 0000 0000 1111 1111 1111 1111 gpkcon7~gpkcon0 uconvalue |= 0x1111<<16;
  0001 0001 0001 0001 0000 0000 0000 = 0000 rGPIOKCON0;
  Rgpiokdat |= Ledall_off;
    while (1) {Rgpiokdat &= led1_on;
Delay (1000);    Rgpiokdat |= Ledall_off;
    Rgpiokdat &= led2_on;
    Delay (1000);

    Rgpiokdat |= Ledall_off;
    Rgpiokdat &= led3_on;
    Delay (1000);

    Rgpiokdat |= Ledall_off;
    Rgpiokdat &= led4_on;
    Delay (1000);
  Rgpiokdat |= Ledall_off;
  } void delay (int times) {int i;
for (; times>0;times--) for (i=0;i<3000;i++); }

=============================================================================================================== =====================

3. If you do not need to RVDS integrated compilation environment, the following is based on the window platform ARMCC compiler in DOS makefile

All:	
	armasm-o startup.o startup.s--debug--keep--cpu=arm1176jzf-s armcc-c main.o main.c--debug--cpu=ARM1176
	Jzf-s-o0	
	armlink-o myled.axf startup.o main.o--ro_base=0x50200000--rw_base=0x50203000---FIRST=STARTUP.O (start) --entry=0x50200000
	fromelf-o myled.bin--bin myled.axf clean: del *.o *.axf *.bin	
	#armasm-

o STARTUP.O Startup.s--debug--keep--cpu=arm1176jzf-s #armcc-C main.o main.c--debug--cpu=arm1176jzf-s-O0
#armlink-O in CLC.AXF STARTUP.O main.o--entry main--ro_base=0x50200000--first=startup.o (start) 
#fromelf-O inclc.bin--bin Inclc.axf

4. After the above, directly pull Axd can be.