1. mian.c
#include "main.h"
/*enable peripheral clock*/
void clock_enable(void)
{
CCM_CCGR1 = 0xFFFFFFFF;
CCM_CCGR2 = 0xFFFFFFFF;
CCM_CCGR3 = 0xFFFFFFFF;
CCM_CCGR4 = 0xFFFFFFFF;
CCM_CCGR5 = 0xFFFFFFFF;
CCM_CCGR6 = 0xFFFFFFFF;
}
/*initialize LED*/
void led_init(void)
{
SW_MUX_GPIO1_IO03 = 0x5; /*set to GPIO1_IO03*/
SW_PAD_GPIO1_IO03 = 0x10b0; /*set GPIO1_IO03 electrical parameters */
/*GPIO initialize*/
GPIO1_GDIR = 0x8; /*set bit3 output*/
GPIO1_DR = 0x0; /*by default, led power on*/
}
void main(void)
{
clk_enable(); /*enale peripheral clk*/
led_init(); /*initialize LED*/
while(1);
}
2. main.h
#ifndef __MAIN.H
#define __MAIN.H
/*define all registers*/
#define CCM_CCGR0 *((volatile unsigned int *)0x020c4068)
#define CCM_CCGR1 *((volatile unsigned int *)0x020c406c)
#define CCM_CCGR2 *((volatile unsigned int