S3C2410A_LED.rar_S3C2410A

/* ****************************************************************** *S3C2440的定时器1实验，用4个LED灯每隔5秒钟亮一次，持续时间为5秒 ****************************************************************** */ #include "2440addr.h" #include "2440lib.h" #include "2440slib.h" #include "option.h" #include "def.h" #include "mmu.h" #define GPIO5_OUT (0x01<<(5*2)) #define GPIO6_OUT (0x01<<(6*2)) #define GPIO7_OUT (0x01<<(7*2)) #define GPIO8_OUT (0x01<<(8*2)) void __irq Timer1_ISR(void); void GPIO_Init(void) { rGPBCON = (GPIO5_OUT | GPIO6_OUT | GPIO7_OUT | GPIO8_OUT); //设置GPIO5~8为输出 rGPBDAT = 0x0f<<5; } void Timer1_Init(void) { rTCFG0 &= (~0xff); rTCFG0 |= 0xf9; rTCFG1 &= (~(0xf<<4)); rTCFG1 |= (0x02<<4); //设置Timer1的时钟频率为25KHZ rTCNTB1 = 12500; //设置Timer1定时时间为每隔5s产生一次中断 rTCON &= (~(0x0f<<8)); rTCON |= (0x01<<9); //设置Timer1手动更新 rTCON &= (~(0x0f<<8)); rTCON |= (0x09<<8); //清手动重载，开自动重载，开启定时器 } void Interrupt_Init(void) { rSRCPND |= (0x01<<11); rINTPND |= (0x01<<11); rINTMSK &= (~(0x01<<11)); //使能Timer4中断 rINTMOD = 0; //设置中断模式为IRQ pISR_TIMER1 = (unsigned)Timer1_ISR; //中断向量注册 } void __irq Timer1_ISR(void) { static U32 Count; Count++; rSRCPND |= (0x01<<11); rINTPND |= (0x01<<11); if(10 == Count) { rGPBDAT ^= (0x0f<<5); Count = 0; } } void Main(void) { U32 mpll_val = 0; mpll_val = (92<<12)|(1<<4)|(1); ChangeMPllValue((mpll_val>>12)&0xff, (mpll_val>>4)&0x3f, mpll_val&3); ChangeClockDivider(14, 12); MMU_Init(); GPIO_Init(); Timer1_Init(); Interrupt_Init(); while(1) { ; } }