Steward

分享是一種喜悅、更是一種幸福

掌機 - Anbernic RG280M - Overclock

---

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>

int main(int argc, char* argv[])
{
    int fd;
    uint8_t *mem;

    fd = open("/dev/mem", O_RDWR);
    if(fd < 0){
        printf("failed to open /dev/mem\n");
        return -1;
    }
    mem = mmap(0, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0x10000000);
    printf("0x%08x 0x%08x 0x%08x\n", 
        *((uint32_t*)(mem + 0x00)), 
        *((uint32_t*)(mem + 0x10)), 
        *((uint32_t*)(mem + 0x30))); 

    //0x52~0x6c: 0x52~0x6c*12MHz
    *((uint32_t*)(mem + 0x10)) = 0x5300850f;
    *((uint32_t*)(mem + 0x10)) = 0x5300851f;
    
    printf("0x%08x 0x%08x 0x%08x\n", 
        *((uint32_t*)(mem + 0x00)), 
        *((uint32_t*)(mem + 0x10)), 
        *((uint32_t*)(mem + 0x30)));
    munmap(mem, 4096);
    close(fd);
    return 0;        
}