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一级逆天
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主函数
#include <string.h>
#include <stdio.h>
#include "Target\44blib.h"
#include "Target\Def.h"
#include "Target\44b.h"
#include "iictest\iic.h"
/********************************************/
// ARMSYS实验十一:IIC接口应用测试(AT24C04)
// 描述:读写IIC接口EEPROM
/********************************************/
void * function[][2]=
{
(void *)Test_Iic, "IIC(AT24LCxx) ",
0,0
};
void Isr_Init(void)
{
rINTCON=0x5; //Non-vectored,IRQ enable,FIQ disable //
rINTMOD=0x0; //All=IRQ mode//
rINTMSK=~(BIT_EINT0 | BIT_GLOBAL);
}
void Main(void)
{
char aa;
int i;
Port_Init();
Uart_Init(0,115200);
Isr_Init();//it's needed.
Led_Display(0xf);
Delay(0);
Beep(0x1);
Uart_Select(0); //Select UART0//
Uart_Printf("\n\n*************************************************************************");
Beep(0x0);
Uart_Printf("\n* 立泰电子 *");
Uart_Printf("\n* -S3C44B0X功能部件:IIC测试- *");
Uart_Printf("\n* Version 1.11 *");
Uart_Printf("\n* Email:rao_dali@263.net *");
Uart_Printf("\n* UART Config--COM:115.2kbps,8Bit,NP,UART0 *");
Uart_Printf("\n*------------------Begin to Start IIC test,OK? (Y/N)--------------------*");
Led_Display(0x0);
aa= Uart_Getch();
if((aa=='Y')||(aa=='y'))
while(1)
{
i=0;
Uart_Printf("\n");
while(1)
{ //display menu
Uart_Printf("%2d:%s",i+1,function[1]);
i++;
if((int)(function[0])==0)
{
Uart_Printf("\n");
break;
}
if((i%4)==0)
Uart_Printf("\n");
}
Uart_Printf("\nSelect the function to test?");
i=Uart_GetIntNum();
i--;
Uart_Printf("\n");
if(i>=0 && (i<(sizeof(function)/8)) )
( (void (*)(void)) (function[0]) )();
}
}
#include <string.h>
#include "..\Target\44b.h"
#include "..\Target\44blib.h"
#include "..\Target\def.h"
#include "iic.h"
#define WRDATA (1)
#define POLLACK (2)
#define RDDATA (3)
#define SETRDADDR (4)
#define IICBUFSIZE 0x20
U8 _iicData[IICBUFSIZE];
volatile int _iicDataCount;
volatile int _iicStatus;
volatile int _iicMode;
int _iicPt;
void __irq IicInt(void);
void Test_Iic(void)
{
unsigned int i,j,save_F,save_PF;
static U8 data[256];
Uart_Printf("[IIC Test using AT24LCxx]\n");
save_F=rPCONF;
save_PF=rPUPF;
rPCONF |=0xa; //PF0:IICSCL, PF1:IICSDA
rPUPF |=0x3; //pull-up disable
pISR_IIC=(unsigned)IicInt;
rINTMSK=~(BIT_GLOBAL|BIT_IIC);
rIICCON=(1<<7)|(0<<6)|(1<<5)|(0xf);
//Enable interrupt, IICCLK=MCLK/16, Enable ACK
//40Mhz/16/(15+1) = 257Khz
rIICADD=0x10; // S3C44B0X slave address
rIICSTAT=0x10;
Uart_Printf("Write test data into AT24LCxx\n");
for(i=0;i<256;i++)
Wr24LCxx(0xa0,(U8)i,i);
for(i=0;i<256;i++)
data=0;
Uart_Printf("Read test data from AT24LCxx\n");
for(i=0;i<256;i++)
Rd24LCxx(0xa0,(U8)i,&(data));
for(i=0;i<16;i++)
{
for(j=0;j<16;j++)
Uart_Printf("%2x ",data[i*16+j]);
Uart_Printf("\n");
}
rPCONF=save_F;
rPUPF=save_PF;
}
void Wr24LCxx(U32 slvAddr,U32 addr,U8 data)
{
_iicMode=WRDATA;
_iicPt=0;
_iicData[0]=(U8)addr;
_iicData[1]=data;
_iicDataCount=2;
rIICDS=slvAddr;//0xa0
rIICSTAT=0xf0; //MasTx,Start
//Clearing the pending bit isn't needed because the pending bit has been cleared.
while(_iicDataCount!=-1);
_iicMode=POLLACK;
while(1)
{
rIICDS=slvAddr;
_iicStatus=0x100;
rIICSTAT=0xf0; //MasTx,Start
rIICCON=0xaf; //resumes IIC operation.
while(_iicStatus==0x100);
if(!(_iicStatus&0x1))
break; // when ACK is received
}
rIICSTAT=0xd0; //stop MasTx condition
rIICCON=0xaf; //resumes IIC operation.
Delay(1); //wait until stop condtion is in effect.
//write is completed.
}
void Rd24LCxx(U32 slvAddr,U32 addr,U8 *data)
{
_iicMode=SETRDADDR;
_iicPt=0;
_iicData[0]=(U8)addr;
_iicDataCount=1;
rIICDS=slvAddr;
rIICSTAT=0xf0; //MasTx,Start
//Clearing the pending bit isn't needed because the pending bit has been cleared.
while(_iicDataCount!=-1);
_iicMode=RDDATA;
_iicPt=0;
_iicDataCount=1;
rIICDS=slvAddr;
rIICSTAT=0xb0; //MasRx,Start
rIICCON=0xaf; //resumes IIC operation.
while(_iicDataCount!=-1);
*data=_iicData[1];
}
void __irq IicInt(void)
{
U32 iicSt,i;
rI_ISPC=BIT_IIC;
iicSt=rIICSTAT;
if(iicSt&0x8){} // when bus arbitration is failed.
if(iicSt&0x4){} // when a slave address is matched with IICADD
if(iicSt&0x2){} // when a slave address is 0000000b
if(iicSt&0x1){} // when ACK isn't received
switch(_iicMode)
{
case POLLACK:
_iicStatus=iicSt;
break;
case RDDATA:
if((_iicDataCount--)==0)
{
_iicData[_iicPt++]=rIICDS;
rIICSTAT=0x90; //stop MasRx condition
rIICCON=0xaf; //resumes IIC operation.
Delay(1); //wait until stop condtion is in effect.
//too long time...
//The pending bit will not be set after issuing stop condition.
break;
}
_iicData[_iicPt++]=rIICDS;
//The last data has to be read with no ack.
if((_iicDataCount)==0)
rIICCON=0x2f; //resumes IIC operation with NOACK.
else
rIICCON=0xaf; //resumes IIC operation with ACK
break;
case WRDATA:
if((_iicDataCount--)==0)
{
rIICSTAT=0xd0; //stop MasTx condition
rIICCON=0xaf; //resumes IIC operation.
Delay(1); //wait until stop condtion is in effect.
//The pending bit will not be set after issuing stop condition.
break;
}
rIICDS=_iicData[_iicPt++]; //_iicData[0] has dummy.
for(i=0;i<10;i++); //for setup time until rising edge of IICSCL
rIICCON=0xaf; //resumes IIC operation.
break;
case SETRDADDR:
//Uart_Printf("[S%d]",_iicDataCount);
if((_iicDataCount--)==0)
{
break; //IIC operation is stopped because of IICCON[4]
}
rIICDS=_iicData[_iicPt++];
for(i=0;i<10;i++); //for setup time until rising edge of IICSCL
rIICCON=0xaf; //resumes IIC operation.
break;
default:
break;
}
} |
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