Forum Post: RE: DDR3 parameters for ZQ_CONFIG Register ARM AM3352; trouble when heating DDR

Hi Trichet,

You can write a simple C program to read from /dev/mem. Example snippet:

void read_mem(unsigned int reg_addr, unsigned int *reg_val, int access_width) {     int fd;     void *mem_map, *mem_addr;     fd = open("/dev/mem" , O_RDWR|O_SYNC);     mem_map = mmap(0, MEM_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, reg_addr & ~MEM_MASK);     mem_addr = mem_map + (reg_addr & MEM_MASK);     printf("0x%08X\n", *(uint32_t*)mem_addr);     close(fd); }

Best regards,
Miroslav