TQ210 裸机测试 AT24C02A代码

#include <bsp.h>

#include <dbgserial.h>

#include "utils.h"

#include "I2C.h"

/* 映射内存*/

#define rGPD1CON (*(volatile unsigned *)(BASE_REG_PA_GPIO+0xC0))

#define rGPD1DAT (*(volatile unsigned *)(BASE_REG_PA_GPIO+0xC4))

#define rGPD1PUD (*(volatile unsigned *)(BASE_REG_PA_GPIO+0xC8))

#define rI2CCON0 (*(volatile unsigned *)(BASE_REG_PA_I2C0+0X00))

#define rI2CCON2 (*(volatile unsigned *)(BASE_REG_PA_I2C2+0X00))

#define rI2CSTAT0 (*(volatile unsigned *)(BASE_REG_PA_I2C0+0X04))

#define rI2CSTAT2 (*(volatile unsigned *)(BASE_REG_PA_I2C2+0X04))

#define rI2CADD0 (*(volatile unsigned *)(BASE_REG_PA_I2C0+0X08))

#define rI2CADD2 (*(volatile unsigned *)(BASE_REG_PA_I2C2+0X08))

#define rI2CDS0 (*(volatile unsigned *)(BASE_REG_PA_I2C0+0X0C))

#define rI2CDS2 (*(volatile unsigned *)(BASE_REG_PA_I2C2+0X0C))

#define rI2CLC0 (*(volatile unsigned *)(BASE_REG_PA_I2C0+0X10))

#define rI2CLC2 (*(volatile unsigned *)(BASE_REG_PA_I2C2+0X10))

#define rAPLL_CON (*(volatile unsigned *)(BASE_REG_PA_CMU_CLK+0X100))

#define rMPLL_CON (*(volatile unsigned *)(BASE_REG_PA_CMU_CLK+0X108))

#define rCLK_SRC0 (*(volatile unsigned *)(BASE_REG_PA_CMU_CLK+0X200))

#define rCLK_DIV0 (*(volatile unsigned *)(BASE_REG_PA_CMU_CLK+0X300))

/*宏*/

#define IICTEST

#define CLEINTADDRESS (0XA0)

#define MASTERADDRESS (0X10)

#define WRDATA (1)

#define POLLACK (2)

#define RDDATA (3)

#define SETRDADDR (4)

#define IICBUFSIZE 0x20

static unsigned char iicSendData[IICBUFSIZE];

static unsigned char iiRecData[256]; //用于存储AT24C02读出的数据

static volatile int iicSendDataCount;

static volatile int iicStatus;

static volatile int iicMode;

static int iicPt;

static unsigned short ucPower = 0;

unsigned int GetPower()

{

ucPower+=10;

if(ucPower>100)

ucPower=10;

return ucPower;

}

void PowerI2C_Init(void)

{

Uart_SendByte('\r');

Uart_SendByte('\n');

Uart_SendByte('I');

Uart_SendByte('2');

Uart_SendByte('C');

Uart_SendByte('_');

Uart_SendByte('I');

Uart_SendByte('n');

Uart_SendByte('i');

Uart_SendByte('t');

Uart_SendByte('\n');

#ifdef IICTEST

rGPD1CON =
0xffff22 ; // SDA0

rGPD1PUD =
0x0; //UP_DOWN POWER DISABLE Disables Pull-up/down

rI2CCON0 =
( (1<<7) | (1<<6) | (1<<5) | (0x3)) ;

rI2CADD0 = MASTERADDRESS; //写入自己的地址

#else

rGPD1CON = 0x22ffff ; // SDA2

rGPD1PUD = 0X3ff;//UP_DOWN POWER DISABLE Disables Pull-up/down

#endif

}

void Wr24C02(unsigned int slvAddr,unsigned int addr,unsigned char data);

void Rd24C02(unsigned int slvAddr,unsigned int addr,unsigned char *data);

void IicPoll(void);

void Run_IicPoll(void);

void Test_AT(void)

{

unsigned int i,j;

Uart_SendByte('W');

Uart_SendByte('\n');

for(i=0;i<256;i++)

Wr24C02(0xa0,(unsigned char)i,i+0X1);//写入数据到AT24C02

for(i=0;i<256;i++)
//数组数据清零

iiRecData[i] = 0;

Uart_SendByte('R');

Uart_SendByte('\n');

for(i=0;i<256;i++)

Rd24C02(0xa0,(unsigned char)i,&(iiRecData[i]));//读取AT24C02的数据放入data数组中

for(i=0;i<16;i++)

{

for(j=0;j<16;j++)

{

Uart_SendDWORD(iiRecData[i*16+j]);

Uart_SendByte(',');

}

Uart_SendByte("\n");

}

}

void Wr24C02(unsigned int slvAddr,unsigned int addr,unsigned char data) // slvAddr 为从地址

{ //addr为字节地址，data为写入的数据

iicMode = WRDATA; //写数据模式

iicPt = 0;

iicSendData[0] = (unsigned char)addr;

iicSendData[1] = data;

iicSendDataCount = 2; //根据AT24C02字节写的发式，要写从地址和字节地址

rI2CDS0 = slvAddr; //把0xa0地址写入到数据移位寄存器IICDS

//Master Tx mode, Start(Write), IIC-bus data output enable

//Bus arbitration sucessful, Address as slave status flag Cleared,

//Address zero status flag cleared, Last received bit is 0

rI2CSTAT0 = 0xf0; //

//Clearing the pending bit isn't needed because the pending bit has been cleared.

while(iicSendDataCount!=-1)

Run_IicPoll();

iicMode = POLLACK;

while(1)

{

rI2CDS0 = slvAddr;

iicStatus = 0x100; //To check if _iicStatus is changed

rI2CSTAT0 = 0xf0; //Master Tx, Start, Output Enable, Sucessful, Cleared, Cleared, 0

rI2CCON0 = 0xe3; //Resumes IIC operation.

while(iicStatus==0x100)

Run_IicPoll();

if(!(iicStatus & 0x1))

break; //When ACK is received

}

rI2CSTAT0 = 0xd0; //Master Tx condition, Stop(Write), Output Enable

rI2CCON0 = 0xe3; //Resumes IIC operation.

Delay(1); //Wait until stop condtion is in effect.

//Write is completed.

}

//************************[ _Rd24C02 ]********************************

void Rd24C02(unsigned int slvAddr,unsigned int addr,unsigned char *data)

{

iicMode = SETRDADDR; //设置要从从机读取数据的从地址

iicPt = 0;

iicSendData[0] = (unsigned char)addr;

iicSendDataCount = 1;
//写从地址

rI2CDS0 = slvAddr;

rI2CSTAT0 = 0xf0; //MasTx,Start

//Clearing the pending bit isn't needed because the pending bit has been cleared.

while(iicSendDataCount!=-1)

Run_IicPoll();

iicMode = RDDATA;
//读数据模式

iicPt = 0;

iicSendDataCount = 1;
//

rI2CDS0 = slvAddr;

rI2CSTAT0 = 0xb0; //Master Rx,Start

rI2CCON0 = 0xe3; //Resumes IIC operation.

while(iicSendDataCount!=-1)

Run_IicPoll();

*data = iicSendData[1];

}

void Run_IicPoll(void)

{

if(rI2CCON0 & 0x10) // Tx/Rx 中断使能

IicPoll();

}

void IicPoll(void)

{

unsigned int iicSt,i;

iicSt = rI2CSTAT0;
//ICC状态寄存器

if(iicSt & 0x8){} //总线仲裁失败

if(iicSt & 0x4){} //从地址与ICCADD地址匹配

if(iicSt & 0x2){} //从地址为00000000b

if(iicSt & 0x1){} //未收到ACK

switch(iicMode)

{

case POLLACK:

iicStatus = iicSt;

break;

case RDDATA:
//从从机中读取数据

if((iicSendDataCount--)==0)

{

iicSendData[iicPt++] = rI2CDS0;

rI2CSTAT0 = 0x90; //Stop MasRx condition

rI2CCON0 = 0xe3; //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;

}

iicSendData[iicPt++] = rI2CDS0;

//The last data has to be read with no ack.

if((iicSendDataCount)==0)

rI2CCON0 = 0x2f; //Resumes IIC operation with NOACK.

else

rI2CCON0 = 0xe3; //Resumes IIC operation with ACK

break;

case WRDATA:
//写数据到从机

if((iicSendDataCount--)==0)

{

rI2CSTAT0 = 0xd0; //stop MasTx condition

rI2CCON0 = 0xe3; //resumes IIC operation.

Delay(1); //wait until stop condtion is in effect.

//The pending bit will not be set after issuing stop condition.

break;

}

rI2CDS0 = iicSendData[iicPt++]; //iicSendData[0] has dummy.

for(i=0;i<10;i++); //for setup time until rising edge of IICSCL

rI2CCON0 = 0xe3; //resumes IIC operation.

break;

case SETRDADDR:
//设置要从从机机读取数据的从机地址

if((iicSendDataCount--)==0)

{

break; //IIC operation is stopped because of IICCON[4]

}

rI2CDS0 = iicSendData[iicPt++];

for(i=0;i<10;i++); //for setup time until rising edge of IICSCL

rI2CCON0 = 0xe3; //resumes IIC operation.

break;

default:

break;

}

}