发布时间 : 星期六 文章ARM9控制LED流水灯程序设计 - 图文更新完毕开始阅读5a1c5a7f31b765ce05081416
华东交通大学理工学院课程设计报告
// Version : 0.1
//=================================================================== #include \#include \#include \#include \#include \ #include
extern char Image$$RW$$Limit[]; void *mallocPt=Image$$RW$$Limit;
static int delayLoopCount; void Delay(int time) //延时函数 {
int i, adjust=0;
if(time==0) {
time = 200; adjust = 1;
delayLoopCount = 800;
rWTCON = ((PCLK/1000000-1)<<8)|(2<<3); rWTDAT = 0xffff;
rWTCON = ((PCLK/1000000-1)<<8)|(2<<3)|(1<<5); //Watch-dog timer
start
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华东交通大学理工学院课程设计报告
}
for(;time>0;time--)
for(i=0;i if(adjust==1) { rWTCON = ((PCLK/1000000-1)<<8)|(2<<3); //Watch-dog timer stop i = 0xffff - rWTCNT; //1count->64us, 200*800 cycle runtime = 64*i us delayLoopCount = 16000000/(i*64); //200*800:64*i=1*x:100 -> x=160000*100/(64*i) } } void Port_Init(void)//I/O口初始化 { rGPACON = 0x7fffff; rGPBCON = 0x155555; rGPBUP = 0x7ff; // The pull up function is disabled GPB[10:0] rGPCCON = 0xaaaaaaaa; rGPCUP = 0xffff; // The pull up function is disabled GPC[15:0] rGPDCON = 0xaaaaaaaa; rGPDUP = 0xffff; // The pull up function is disabled GPD[15:0] rGPECON = 0xaaaaaaaa; rGPEUP = 0xffff; // The pull up function is disabled GPE[15:0] rGPFCON = 0x55aa; rGPFUP = 0xff; // The pull up function is disabled GPF[7:0] rGPGCON = 0xff95ffba; rGPGUP = 0xffff; // The pull up function is disabled GPG[15:0] rGPHCON = 0x2afaaa; rGPHUP = 0x7ff; // The pull up function is disabled GPH[10:0] rGPJDAT = (1<<12)|(0<<11); - 13 - 华东交通大学理工学院课程设计报告 rGPJCON = 0x016aaaa; rGPJUP = ~((0<<12)|(1<<11)); rGPJDAT = (0<<12)|(0<<11); rGPJCON = 0x016aaaa; rGPJUP = 0x1fff;//~((1<<12)|(1<<11)); rEXTINT0 = 0x22222222; // EINT[7:0] rEXTINT1 = 0x22222222; // EINT[15:8] rEXTINT2 = 0x22222222; // EINT[23:16] } static int whichUart=1; void Uart_Init(int pclk,int baud)//串口初始化，设置时钟，波特率 { if(pclk == 0) pclk = PCLK; rUFCON0 = 0x0; //UART channel 0 FIFO control register, FIFO disable rUFCON1 = 0x0; //UART channel 1 FIFO control register, FIFO disable rUFCON2 = 0x0; //UART channel 2 FIFO control register, FIFO disable rUMCON0 = 0x0; //UART chaneel 0 MODEM control register, AFC disable rUMCON1 = 0x0; //UART chaneel 1 MODEM control register, AFC disable //UART0 rULCON0 = 0x3; //Line control register : Normal,No parity,1 stop,8 bit rUCON0 = 0x245; // Control register rUBRDIV0 = 0x34; //UART1 rULCON1 = 0x3; rUCON1 = 0x245; rUBRDIV1=( (int)(pclk/16./baud+0.5) -1 ); //UART2 rULCON2 = 0x3; rUCON2 = 0x245; - 14 - 华东交通大学理工学院课程设计报告 rUBRDIV2=( (int)(pclk/16./baud+0.5) -1 ); } void Uart_Select(int ch) { whichUart = ch; } void Uart_TxEmpty(int ch) { if(ch==0) while(!(rUTRSTAT0 & 0x4)); //Wait until tx shifter is empty. else if(ch==1) while(!(rUTRSTAT1 & 0x4)); //Wait until tx shifter is empty. else if(ch==2) while(!(rUTRSTAT2 & 0x4)); //Wait until tx shifter is empty. } void Uart_SendString(char *pt) { while(*pt) Uart_SendByte(*pt++); } void Led_Display(int data) //LED显示 { rGPFDAT = (rGPFDAT & ~(0xf<<4)) | ((~data & 0xf)<<4); } void Timer_Start(int divider) //0:16us,1:32us 2:64us 3:128us { - 15 - Uart_TxEmpty(whichUart);