HardwareInit.c

#include "HardwareInit.h"
          

void initHardward(){

    // Open Memory Map I/O driver and map virtual address for I2C0 and SYSMGR
    openPhysical();
    Pinmux_Config();
    I2C0_Init();
    ADXL345_REG_READ(0x00, &devid);
}

// Open Physical, map LW_virtual, I2C0_ptr, and SYSMGR_ptr to physical memory.
void openPhysical(){

    if( (fd = open( "/dev/mem", (O_RDWR | O_SYNC))) == -1) {
		printf( "ERROR: could not open \"/dev/mem\"...\n" );
		return( 1 );
	}

    LW_virtual = mmap (NULL,  LW_BRIDGE_SPAN, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, LW_BRIDGE_BASE);
    if (LW_virtual == MAP_FAILED)
    {
        printf ("ERROR: mmap() failed...\n");
        close (fd);
        return (NULL);
    }

    I2C0_ptr = (volatile unsigned int *)mmap(NULL, 0x00000100, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0xFFC04000);
	SYSMGR_ptr = (volatile unsigned int *)mmap(NULL, 0x00000800, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0xFFD08000);
}