iic.rar_s3c2440 iic

#define _ISR_STARTADDRESS 0x33ffff00 #define U32 unsigned int #define U8 unsigned char #define pISR_UART0 (*(unsigned *)(_ISR_STARTADDRESS+0x90)) #define pISR_IIC (*(unsigned *)(_ISR_STARTADDRESS+0x8c)) #define rULCON0 (*(volatile unsigned *)0x50000000) //UART 0 Line control #define rUCON0 (*(volatile unsigned *)0x50000004) //UART 0 Control #define rUFCON0 (*(volatile unsigned *)0x50000008) //UART 0 FIFO control #define rUMCON0 (*(volatile unsigned *)0x5000000c) //UART 0 Modem control #define rUTRSTAT0 (*(volatile unsigned *)0x50000010) //UART 0 Tx/Rx status #define rUERSTAT0 (*(volatile unsigned *)0x50000014) //UART 0 Rx error status #define rUFSTAT0 (*(volatile unsigned *)0x50000018) //UART 0 FIFO status #define rUMSTAT0 (*(volatile unsigned *)0x5000001c) //UART 0 Modem status #define rUBRDIV0 (*(volatile unsigned *)0x50000028) //UART 0 Baud rate divisor //little endian #define rUTXH0 (*(volatile unsigned char *)0x50000020) //UART 0 Transmission Hold #define rURXH0 (*(volatile unsigned char *)0x50000024) //UART 0 Receive buffer #define rSRCPND (*(volatile unsigned *)0x4a000000) //Interrupt request status //#define rINTMOD (*(volatile unsigned *)0x4a000004) //Interrupt mode control #define rINTMSK (*(volatile unsigned *)0x4a000008) //Interrupt mask control //#define rPRIORITY (*(volatile unsigned *)0x4a00000c) //IRQ priority control #define rINTPND (*(volatile unsigned *)0x4a000010) //Interrupt request status #define rSUBSRCPND (*(volatile unsigned *)0x4a000018) //Sub source pending #define rINTSUBMSK (*(volatile unsigned *)0x4a00001c) //Interrupt sub mask //#define rGPFCON (*(volatile unsigned *)0x56000050) //Port F control #define rGPHCON (*(volatile unsigned *)0x56000070) //Port H control //#define rGPHDAT (*(volatile unsigned *)0x56000074) //Port H data #define rGPHUP (*(volatile unsigned *)0x56000078) //Pull-up control H #define rGPECON (*(volatile unsigned *)0x56000040) //Port E control #define rGPEDAT (*(volatile unsigned *)0x56000044) //Port E data #define rGPEUP (*(volatile unsigned *)0x56000048) //Pull-up control E // IIC #define rIICCON (*(volatile unsigned *)0x54000000) //IIC control #define rIICSTAT (*(volatile unsigned *)0x54000004) //IIC status #define rIICADD (*(volatile unsigned *)0x54000008) //IIC address #define rIICDS (*(volatile unsigned *)0x5400000c) //IIC data shift #define rIICLC (*(volatile unsigned *)0x54000010) //IIC multi-master line control #define rGPBCON (*(volatile unsigned *)0x56000010) //Port B control #define rGPBDAT (*(volatile unsigned *)0x56000014) //Port B data #define rGPBUP (*(volatile unsigned *)0x56000018) //Pull-up control B unsigned char iic_buffer[8];//year1,month,day,hour,minute,second; unsigned char address,length; unsigned char flag; unsigned char comm; unsigned char devAddr=0xa0; void delay(int a) { int k; for(k=0;k<a;k++) ; } void __irq IicISR(void) { rSRCPND |= 0x1<<27; rINTPND |= 0x1<<27; flag = 0; } void __irq uartISR(void) { char ch; static char command; static char count; //static char count1; rSUBSRCPND |= 0x1; rSRCPND |= 0x1<<28; rINTPND |= 0x1<<28; //if(rUTRSTAT0 & 1) //接收数据处理部分 //{ ch = rURXH0; //接收字节数据 if(command==0) { switch(ch) { case 0xc0: command = 0xc0; //接收数据，写eeprom count=0; comm = 0; //rUTXH0=ch; break; case 0xc1: command = 0xc1; //发送数据，读eeprom count=0; comm = 0; //rUTXH0=ch; break; default: command = 0; count =0; rUTXH0=ch; break; } } else { if(command == 0xc0) { count++; if (count == 1) { address = ch; } else if(count == 2) { length = ch; //count1=0; } else { iic_buffer[count-3] = ch; //count1++; if(count==length+2) { rUTXH0=0xc0; count=0; command=0; comm=1; } } } else if(command ==0xc1) { count++; if(count==1) { address = ch; } else { length = ch; rUTXH0=0xc1; count=0; command=0; comm = 2; } } } //} } void wr24c02a(unsigned char wordAddr,unsigned char iic_buffer[],int sizeofdate ) { //static int iii; int i; //rIICCON &= ~0x10; flag =1; rIICDS =0xa1; //devAddr;//(devAddr<<1) | 0x0; rIICCON &= ~0x10; rIICSTAT = 0xf0; //iii++; while(flag == 1) delay(100);//rGPBDAT = ~0x1e0;; //rGPBDAT = 0x1e0; flag = 1; //rIICCON &= ~0x10; rIICDS = wordAddr; rIICCON &= ~0x10; while(flag) {delay(100); /*rGPBDAT = ~0x1e0;*/} for(i=0;i<sizeofdate;i++) { flag = 1; //rIICCON &= ~0x10; rIICDS = iic_buffer[i]; rIICCON &= ~0x10; while(flag) delay(100); } //rIICCON &= ~0x10; rIICSTAT = 0xd0; //stop bit rIICCON = 0xe0; //iic ready delay(100); //wait a few time } void rd24c02a(unsigned char wordAddr,unsigned char iic_buffer[],int sizeofdate ) { int i; unsigned char temp; flag =1; //rIICCON &= ~0x10; rIICDS = devAddr;//(devAddr<<1) | 0x0; rIICSTAT = 0xf0; rIICCON &= ~0x10; while(flag) delay(100); rGPBDAT = ~0x1e0; flag = 1; //rIICCON &= ~0x10; rIICDS = wordAddr; rIICCON &= ~0x10; while(flag) delay(100); flag = 1; //rIICCON &= ~0x10; rIICDS = devAddr;//(devAddr<<1) | 0x0; rIICSTAT = 0xb0; rIICCON &= ~0x10; while (flag) delay(100); flag = 1; temp = rIICDS; rIICCON &= ~0x10; while(flag) delay(100); for(i=0;i<sizeofdate;i++) { flag = 1; //rIICCON &= ~0x10; if(i==sizeofdate-1) rIICCON &= ~0x80; iic_buffer[i] = rIICDS; //rUTXH0 = iic_buffer[i]; rIICCON &= ~0x10; while(flag) delay(100); } rIICSTAT = 0x90; //stop bit rIICCON = 0xe0; //iic ready rGPBDAT = 0x1e0; delay(100); //wait a few time } void Main(void) { int i; //uart0 port rGPHCON = 0x00faaa; rGPHUP = 0x7ff; //iic port rGPEUP = 0xc000; //Pull-up disable rGPECON = 0xa0000000; //GPE15:IICSDA , GPE14:IICSCL //uart0 rULCON0 = 0x3; rUCON0 = 0x5; rUFCON0 = 0; rUMCON0 = 0; rUBRDIV0 = 26; rSRCPND = (0x1<<27)|(0x1<<28); rSUBSRCPND = 0x1; rINTPND = (0x1<<27)|(0x1<<28); rINTSUBMSK = ~(0x1); rINTMSK = ~((0x1<<27)|(0x1<<28)); rGPBCON = 0x015550; rGPBUP = 0x7ff; rGPBDAT = 0x1e0; //init iic rIICCON = 0xe0; rIICSTAT = 0x10; //IIC bus data output enable(Rx/Tx) //rIICADD = 0x10; //2410 slave address = [7:1] pISR_UART0 = (U32)uartISR; pISR_IIC = (U32)IicISR; for (i=0;i<8;i++) { iic_buffer[i] = (i+1)*0x11; } flag=1; comm=0; while(1) { switch(comm) { case 1: //rUTXH0 = 0xbb; wr24c02a(address,iic_buffer,length); comm=0; //rGPBDAT = ~0x1e0; flag=1; address=0; length=0; //rUTXH0 = 0x99; break; case 2: rd24c02a(address,iic_buffer,length); comm=0; //rGPBDAT = ~0x1e0; //rUTXH0 = 0xaa; flag=1; address=0; for(i=0;i<length;i++) { delay(500); rUTXH0 = iic_buffer[i]; } length=0; break; } } }