"Tiny6410 Bare Metal Program" nineth Chapter: tiny6410 Key Control Buzzer Program _ hardware-related

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

There is no transfer, record it first:

1.startup.s

	Preserve8  
	IMPORT  Keymain        declares the main () function area start,code,readonly in the C program,    declares the code snippet Start  
	ENTRY               ; Identify the program entry  
	CODE32              Statement 32-bit ARM instruction  
  
	LDR r0, =0x70000000        
	Orr r0, R0, #0x13  
	mcr p15,0,r0,c15,c2,4     ; 256M (0x70000 0000~0X7FFF FFFF) Arm coprocessor tells the coprocessor the base address and address space of the peripheral registers


	Ldr r0, =0x7e004000  
	mov r1, #0  
	str R1, [r0]              ; Close the watchdog.  
  
	Ldr sp, =8*1024           ; set c stack  

PROC
	MRC p15,0,r0,c1,c0,0
	Orr r0,r0,# (1<<24)
	MCR p15,0, r0,c1,c0,0  prohibit MMU and cache
	mov	PC,LR   ; enable Vic
ENDP
	; Mrs	R0,CPSR
	; Bic	r0,r0,# (1<<7)
	; MSR	cpsr_cxsf,r0             
	; mov	PC,LR  ; enabling IRQ


	BL Keymain 
	End

2.key.c

Vic total midrange controller #define RVIC0INTENABLE (* (Volatile u32 *) (0x71200000 + 0x10)) #define RVIC0INTENCLEAR (* (Volatile u32 *) (0x712 00000 + 0x14)) #define RVIC0INTSELECT (* (Volatile u32 *) (0x71200000 + 0x0c)) #define RVIC0ADDR (* (Volatile u32 *) (0x712000 + 0xff) #define RVIC0VECTADDR (* (Volatile u32 *) (0x71200000 + 0x100))//gpio #define RGPIOFCON (* (volatile u32 *) 0x7f
0080A0)//Connection buzzer #define RGPIOFDAT (* (volatile u32 *) 0x7f0080a4) #define RGPIONCON (* (volatile u32 *) 0x7f008830)//Connect key #define RGPIONPUD (* (volatile u32 *) 0x7f008838)//External child Interrupt Controller #define REINT0CON0 (* volatile u32 *) 0x7f008900) #define Reint

0MASK (* (volatile u32 *) 0x7f008920) #define REINT0PEND (* (volatile u32 *) 0x7f008924) typedef unsigned long u32;
void __irq isr_eint (void);
void Gpiofinit (void);
void Gpioninit (void);
void GPIONinit1 (void);
void Eint0init (void);
void ENABLEvic0 (void);

void Eint0mask (void);
  int Keymain (void) {//Set GPN0 (connection KEY1) PIN for external terminal mode Gpioninit ();

  GPIONinit1 (); Set GPF14 (connection buzzer) pin for output mode GPIOFinit ();

  


  Set the external child interrupt controller, i.e. GPN0 (EINT0) for low-level triggering interrupt eint0init ();
  
    
    Eint0/gpn0 Interrupt Shielding Eint0mask () for external child interrupts;
  Initialize VIC total interrupt controller//rvic0intenclear = 0xFFFFFFFF;
  Rvic0intselect = 0x0;

  rvic0addr = 0;
  Set the total Interrupt Controller midrange Service entry Address rvic0vectaddr = ((unsigned) isr_eint);
  
  ENABLEvic0 ();
while (1);
  } void __irq Isr_eint (void) {u32 i;  Reint0pend = 0x1;    Clear Interrupt Rgpiofdat |= 0x1<<14;
  0000 0000 0000 0000 10000 0000 0000 for (0000);  Rgpiofdat &= ~ (0x1<<14);
  1111 1111 1111 1111 01111 1111 1111 for (1111);
RVIC0ADDR = 0x0;
  } void Gpiofinit (void) {u32 fconvalue;
  Set GPF14 (connection buzzer) pin for output mode fconvalue = Rgpiofcon; Fconvalue &= ~ (0x3<<28);    1100 1111 1111 1111 1111 1111 1111 1111 fconvalue |= 0x1<<28;
0001 0000 0000 0000 0000 0000 0000 = 0000 Rgpiofcon;
  } void Gpioninit (void) {u32 nconvalue;
  Set GPN0 (connection KEY1) PIN for external terminal mode//nconvalue = Rgpioncon; Nconvalue &= ~ (0x3);        1111 1111 1111 1111 1111 1111 1111 1100 nconvalue;
0000 0000 0000 0000 0000 0000 0000 = 0010 Rgpioncon;
  } void GPIONinit1 (void) {u32 n1convalue;
  N1convalue = Rgpionpud;     N1convalue &= ~ (0x3);        1111 1111 1111 1111 1111 1111 1111 1100 n1convalue;
0000 0000 0000 0000 0000 0000 0000 = 0000 Rgpionpud;
  } void Eint0init (void) {//Set external child interrupt Controller, i.e. GPN0 (EINT0) for low-level triggering interrupt u32 econvalue;
  Econvalue = Reint0con0;     Econvalue &= ~ (0x7);        1111 1111 1111 1111 1111 1111 1111 1000 econvalue; 
  0000 0000 0000 0000 0000 0000 0000 = 0000 Reint0con0;
Reint0pend = 0x1;
  } void ENABLEvic0 (void) {u32 vconvalue;
  Vconvalue = rvic0intenable;        Vconvalue |= 0x1;	
0000 0000 0000 0000 0000 0000 0000 = 0001 rvic0intenable;
  } void Eint0mask (void) {u32 mconvalue;
  Mconvalue = Reint0mask;     Mconvalue &= ~ (0x1); 1111 1111 1111 1111 1111 1111 1111 1110
  Reint0mask = Mconvalue; }

3. The following is a makefile based on the Windows ARMCC compiler

All:	
	armasm-o startup.o startup.s--debug--keep--cpu=arm1176jzf-s armcc-c key.o key.c--debug--cpu=ARM1176JZ
	F-s-o0 armlink-o mykey.axf startup.o key.o--ro_base=0x50200000--rw_base=0x50203000---first=Startup.o	
	(start)- entry=0x50200000
	fromelf-o mykey.bin--bin mykey.axf clean
:	
	del *.o *.axf *.bin