pwm.zip_4412 PWM_cortexA9开发板_exynos4412 pwm_site:www.pudn.com

int (*printf)(char * ,...) = 0x43e11434; void (*memcpy)(void *dest, const void *src, int size) = 0x43e25c6c; void irq_func(); extern unsigned long * my_start; extern unsigned long * my_end; #define pwm_base 0x139D0000 #define TCFG0 *(volatile unsigned long *)(pwm_base + 0x0000) #define TCFG1 *(volatile unsigned long *)(pwm_base + 0x0004) #define TCON *(volatile unsigned long *)(pwm_base + 0x0008) #define TCNTB0 *(volatile unsigned long *)(pwm_base + 0x000C) #define TCMPB0 *(volatile unsigned long *)(pwm_base + 0x0010) #define TCNTO0 *(volatile unsigned long *)(pwm_base + 0x0014) #define TCNTB1 *(volatile unsigned long *)(pwm_base + 0x0018) #define TCMPB1 *(volatile unsigned long *)(pwm_base + 0x001C) #define TCNTO1 *(volatile unsigned long *)(pwm_base + 0x0020) #define TCNTB2 *(volatile unsigned long *)(pwm_base + 0x0024) #define TCMPB2 *(volatile unsigned long *)(pwm_base + 0x0028) #define TCNTO2 *(volatile unsigned long *)(pwm_base + 0x002C) #define TCNTB3 *(volatile unsigned long *)(pwm_base + 0x0030) #define TCMPB3 *(volatile unsigned long *)(pwm_base + 0x0034) #define TCNTO3 *(volatile unsigned long *)(pwm_base + 0x0038) #define TCNTB4 *(volatile unsigned long *)(pwm_base + 0x003C) #define TCNTO4 *(volatile unsigned long *)(pwm_base + 0x0040) #define TINT_CSTAT *(volatile unsigned long *)(pwm_base + 0x0044) //step 1 void open_pwm(void); //step 2 p752 void open_gic(unsigned long irq_num); void enable_ibit(void); void init_mmu(void); void init_table(unsigned long * base); #define MMU_BASE 0x50000000 #define VEC_BASE 0x51000000 #define FUN_BASE 0x52000000 #define STA_BASE 0x53000000 int main() { void * dest = 0x510f0000; memcpy(dest,my_start,0x10000); return 0; volatile unsigned long * gpdcon = 0x114000a0; *gpdcon &= 0xfffffff0; *gpdcon |= 0x2; gpdcon = FUN_BASE; *gpdcon = irq_func; printf(" mmu \n"); init_mmu(); printf(" ibit \n"); enable_ibit(); unsigned long irq = 69; printf(" gic \n"); open_gic(irq); irq=75; open_gic(irq); printf(" pwm \n"); open_pwm(); // wtd_open(); printf("ok \n"); } void init_table(unsigned long *base) { unsigned long phy; unsigned long vir; for(vir = 0;vir < 0xffffffff;vir += 0x100000) { phy = vir; base[vir >> 20] = phy | 2 ; if(0xfff00000 == vir) break; } vir = 0xfff00000; //vir = 0x0; phy = VEC_BASE; base[vir >> 20] = phy | 2; return ; } void init_mmu(void) { unsigned long * base = MMU_BASE; init_table(base); __asm__( "mov r0,#0\n" "mvn r0,r0\n" "mcr p15,0,r0,c3,c0,0 \n" "mcr p15,0,%0,c2,c0,0 \n" "mrc p15,0,r0,c1,c0,0 \n" "orr r0,r0,#1 \n" "mov r1,#0x2000\n" "orr r0,r0,r1\n" "mcr p15,0,r0,c1,c0,0 \n" :"+r"(base) : :"r0","r1" ); } void open_pwm() { TCFG0 |= 0x1 | ( 0xfe << 16) ; TCFG1 &= ~0xf; TCNTB0 = 50*1000*1000; TCMPB0 = 25*1000*1000; TINT_CSTAT = 1; TCON = (1 << 1); TCON = 1 |(1 << 2)|(1 << 3); return ; } void open_gic(unsigned long irq) { volatile unsigned long * iccicr = 0x10480000; *iccicr = 1; volatile unsigned long * iccpmr = 0x10480004; *iccpmr = 0xff; volatile unsigned long * icddcr = 0x10490000; *icddcr = 1; volatile unsigned long * icdiser = 0x10490100; icdiser += irq/32; *icdiser |= (1 << irq%32); volatile unsigned long *icdipr = 0x10490400; icdipr += irq/4; *icdipr &= ~(0xff << (irq%4)*8); volatile unsigned long *icdiptr = 0x10490800; icdiptr += irq/4; *icdiptr &= ~(0xff << (irq%4)*8); *icdiptr |= (1 << (irq%4)*8); return ; } void enable_ibit(void) { __asm__( "mrs r0,cpsr \n" "mvn r1,#0x80\n" "and r0,r0,r1\n" "msr cpsr,r0 \n" : : :"r0" ); return ; } #define WTCON *(volatile unsigned long *)(0x10060000) #define WTDAT *(volatile unsigned long *)(0x10060004) #define WTCNT *(volatile unsigned long *)(0x10060008) #define WTCLR *(volatile unsigned long *)(0x1006000c) void wtd_open(void) { WTCON = (1 << 2) | ( 3 << 3) | (1 << 5) | (250 << 8); WTDAT = 31250; WTCNT = 31250; } void irq_func() { volatile unsigned long *irq = 0x10490208; if((*irq) & (1 << 5)) { printf("pwm irq come in \n"); TINT_CSTAT |= (1 << 5); return ; } printf("other irq \n"); return; } __asm__( "start:\n" ".ascii \"hello\"\n" ".word 0x12345678\n" ".word 0x12345678\n" "nop \n" "b undef \n" "b swi \n" "nop \n" "b abort\n" "nop\n" "b irq\n" "undef:\n" "mov sp,#0x68000000\n" "stmfd sp!,{r0-r12,lr}\n" "ldmfd sp,{r0-r12,pc}^\n" "swi:\n" "mov sp,#0x68000000\n" "stmfd sp!,{r0-r12,lr}\n" "abort:\n" "mov sp,#0x68000000\n" "ldmea sp,{r0-r12,pc}^\n" "mov sp,#0x68000000\n" "sub lr,lr,#4\n" "stmfd sp!,{r0-r12,lr} \n" "mov sp,#0x68000000\n" "ldmea sp,{r0-r12,pc}^\n" "irq:\n" "mov sp,#0x68000000\n" "sub lr,lr,#4\n" "stmfd sp!,{r0-r12,lr} \n" "mov r2,#0x52000000\n" "ldr r3,[r2]\n" "blx r3\n" "mov sp,#0x68000000\n" "ldmea sp,{r0-r12,pc}^\n" "end:\n" "my_start:\n" ".word start\n" "my_end:\n" ".word end\n" );