fengmingqi.zip_arm 蜂鸣器_s3c6410 buzzer_s3c6410蜂鸣器

#define rGPFCON (*(volatile unsigned *)(0x7F0080A0)) #define rGPFDAT (*(volatile unsigned *)(0x7F0080A4)) #define rGPFPUD (*(volatile unsigned *)(0x7F0080A8)) #define rGPNCON (*(volatile unsigned *)(0x7F008830)) #define rGPNDAT (*(volatile unsigned *)(0x7F008834)) #define rGPNPUD (*(volatile unsigned *)(0x7F008838)) #define PCLK 66000000 //for S3C6410 66MHZ #define HCLK 133000000 //for S3C6410 133MHZ #define rTCFG0 (*(volatile unsigned *)(0x7F006000)) #define rTCFG1 (*(volatile unsigned *)(0x7F006004)) #define rTCON (*(volatile unsigned *)(0x7F006008)) #define rTCNTB0 (*(volatile unsigned *)(0x7F00600C)) #define rTCMPB0 (*(volatile unsigned *)(0x7F006010)) #define rTCNTO0 (*(volatile unsigned *)(0x7F006014)) #define rTCNTB1 (*(volatile unsigned *)(0x7F006018)) #define rTCMPB1 (*(volatile unsigned *)(0x7F00601c)) #define rTCNTO1 (*(volatile unsigned *)(0x7F006020)) #define rTCNTB2 (*(volatile unsigned *)(0x7F006024)) #define rTCNTO2 (*(volatile unsigned *)(0x7F00602c)) #define rTCNTB3 (*(volatile unsigned *)(0x7F006030)) #define rTCNTO3 (*(volatile unsigned *)(0x7F006038)) #define rTCNTB4 (*(volatile unsigned *)(0x7F00603c)) #define rTCNTO4 (*(volatile unsigned *)(0x7F006040)) #define rTINT_CSTAT (*(volatile unsigned *)(0x7F006044)) int p=100; void uDelay(int usec)//微秒精确延时 { unsigned int val = (PCLK)/1000000-1; rTCFG0 &= ~(0xff<<8); rTCFG0 |= 0<<8; rTCFG1 &= ~(0xf<<8); rTCFG1 |= 0<<8; rTCNTB2 = val; rTCON &= ~(0xf<<12); rTCON |= 0xb<<12; rTCON &= ~(2<<12); while(usec--) { while(rTCNTO2>=val>>1); while(rTCNTO2<val>>1); } } void GPIO_Init(void) { /*-------init Beep-----*/ rGPFCON = rGPFCON & (~(0x1 << (31))); rGPFCON = rGPFCON | (0x1 << (2*15)); rGPFPUD = rGPFPUD & (~(0x3 << (2*15))) ; rGPFDAT = rGPFDAT | 0x8000; /*-------init Kye------*/ rGPNCON = rGPNCON & (0xffffffff << (2*6)); } void BeepOn(void) { rGPFDAT = rGPFDAT | 0x8000; } void BeepOff(void) { rGPFDAT = rGPFDAT & 0x7fff; } void KeyScan(void) { if ((rGPNDAT & 0x3f) != 0x3f) { if ((rGPNDAT & 0x3e) == 0x3e)//按键1增频 { uDelay(100); if ((rGPNDAT & 0x3e) == 0x3e) p=p-5; } if ((rGPNDAT & 0x3d) == 0x3d)//按键2降频 { uDelay(100); if ((rGPNDAT & 0x3d) == 0x3d) p=p+5; } } } void KeyTest(void) { while (p>0)//频率过小停止发声 { int i,j; KeyScan(); { BeepOn(); for(i=0;i<1000;i++) uDelay(p); BeepOff(); for(j=0;j<1000;j++) uDelay(p); } } BeepOff(); } void Main(void) { GPIO_Init(); BeepOff(); KeyTest(); }