////////////////////////////
//¹¦ÄÜ£º¶ÁOV7660¼Ä´æÆ÷
//·µ»Ø£º1-³É¹¦ 0-ʧ°Ü
uchar rdOV7670Reg(uchar regID, uchar *regDat)
{
//ͨ¹ýд²Ù×÷ÉèÖüĴæÆ÷µØÖ·
startSCCB();
if(0==SCCBwriteByte(0x60))
{
stopSCCB();
return(0);
}
//Delay_nUS(100);
if(0==SCCBwriteByte(regID))
{
stopSCCB();
return(0);
}
stopSCCB();
//Delay_nUS(100);
//ÉèÖüĴæÆ÷µØÖ·ºó£¬²ÅÊǶÁ
startSCCB();
if(0==SCCBwriteByte(0x61))
{
stopSCCB();
return(0);
}
//Delay_nUS(100);
*regDat=SCCBreadByte();
noAck();
stopSCCB();
return(1);
}
////////////////////////////
//╣д─▄Б║Х┴OV7660╝─┤Ткэ
//их╗пБ║1-│╔╣д 0-╩Д░▄
//guanfu_wang
unsigned char rd_Sensor_Reg(unsigned char regID, unsigned char *regDat)
{
//═е╣§л┤▓┘Оэ╔Уо├╝─┤Ткэхпои
startSCCB();
if(0==SCCBwriteByte(0x42))//л┤хпои
{
stopSCCB();//иб╦═SCCB О▄¤▀═Бо╣┤Ф╩С├Ч┴Ь
return(0);//┤ь╬зих╗п
}
delay_us(100);
if(0==SCCBwriteByte(regID))//╗§┤ТкэID
{
stopSCCB();//иб╦═SCCB О▄¤▀═Бо╣┤Ф╩С├Ч┴Ь
return(0);//┤ь╬зих╗п
}
stopSCCB();//иб╦═SCCB О▄¤▀═Бо╣┤Ф╩С├Ч┴Ь
delay_us(100);
//╔Уо├╝─┤Ткэхпои║зБг▓┼╩КХ┴
startSCCB();
if(0==SCCBwriteByte(0x43))//Х┴хпои
{
stopSCCB();//иб╦═SCCB О▄¤▀═Бо╣┤Ф╩С├Ч┴Ь
return(0);//┤ь╬зих╗п
}
delay_us(100);
*regDat=SCCBreadByte();//их╗пХ┴хйх─ох
noAck();//иб╦═NACK├Ч┴Ь
stopSCCB();//иб╦═SCCB О▄¤▀═Бо╣┤Ф╩С├Ч┴Ь
return(1);//│╔╣дих╗п
}
//读OV7660寄存器
u8 OV_ReadReg(u8 regID, u8 *regDat)
{
//通过写操作设置寄存器地址
SCCB_Start();
if(SCCB_Write(0x42))//写地址
{
SCCB_Stop();//发送SCCB 总线停止传输命令
return 1;//错误返回
}
delay_us(10);
if(SCCB_Write(regID))//积存器ID
{
SCCB_Stop();//发送SCCB 总线停止传输命令
return 2;//错误返回
}
SCCB_Stop();//发送SCCB 总线停止传输命令
delay_us(10);
//设置寄存器地址后，才是读
SCCB_Start();
if(SCCB_Write(0x43))//读地址
{
SCCB_Stop();//发送SCCB 总线停止传输命令
return 3;//错误返回
}
delay_us(10);
*regDat=SCCB_Read();//返回读到的值
noAck();//发送NACK命令
SCCB_Stop();//发送SCCB 总线停止传输命令
return 0;//成功返回
}
uchar read(uchar ch )
{
uchar temp=0;
start();
send(AddWr);//确认芯片
ack();
send(adCon|ch);//确认通道
ack();
//读出数据，放进temp
start();
send(AddRd);
ack();
temp=recive();
noAck();
stop();
return temp;
}
////////////////////////////
//Function:read MTpM031 reg
//return: 0=success; 1=fail
uchar rdMT9M031Reg(uchar regID_h, uchar regID_l, uchar length, uchar *regDat_h, uchar *regDat_l)
{
//ͨ¹ýд²Ù×÷ÉèÖüĴæÆ÷µØÖ·
startSCCB();
if(SCCBwriteByte(0x20))
{
stopSCCB();
return(1);
}
usleep(DELAY_TIME);
if(SCCBwriteByte(regID_h))
{
stopSCCB();
return(1);
}
usleep(DELAY_TIME);
if(SCCBwriteByte(regID_l))
{
stopSCCB();
return(1);
}
stopSCCB();
usleep(DELAY_TIME);
//ÉèÖüĴæÆ÷µØÖ·ºó£¬²ÅÊǶÁ
startSCCB();
if(SCCBwriteByte(0x21))
{
stopSCCB();
return(1);
}
usleep(DELAY_TIME);
*regDat_h=SCCBreadByte();
if(length == 2){
usleep(DELAY_TIME);
SCCB_Ack();
*regDat_l=SCCBreadByte();
}
noAck();
stopSCCB();
return(0);
}
void i2cCheckPort(i2cPortData *pPort)
{
switch(pPort->i2cState)
{
case I2C_STATE_START:
if(!pPort->pConBits->SEN)
{ // start done - send a read or write address
sendAddress(pPort);
}
break;
case I2C_STATE_ADDR:
if(!pPort->pStatBits->TRSTAT)
{ // address send done - did the device ack?
if(!pPort->pStatBits->ACKSTAT)
{ // device ack'd
if(pPort->writeSize)
{ // start writing
writeNextByte(pPort);
}
else
{ // start reading
readNextByte(pPort);
}
}
else
{ // no ack - do a stop and give up
noAck(pPort);
}
}
break;
case I2C_STATE_WRITE:
if(!pPort->pStatBits->TRSTAT)
{ // write done - did the device ack?
if(!pPort->pStatBits->ACKSTAT)
{
if(pPort->i2cIndex < pPort->writeSize)
{
writeNextByte(pPort);
}
else
{ // done writing - might need to read
if(pPort->readSize)
{ // repeat start
pPort->pConBits->RSEN = 1;
pPort->i2cState = I2C_STATE_R_START;
}
else
{
i2cStop(pPort);
}
}
}
else
{
noAck(pPort);
}
}
break;
case I2C_STATE_R_START:
if(!pPort->pConBits->RSEN)
{ // Repeat start done - back to the address
pPort->writeSize = 0; // force a read
sendAddress(pPort);
}
break;
case I2C_STATE_READ:
if(!pPort->pConBits->RCEN)
{ // done reading, now do ack
pPort->readBuffer[pPort->i2cIndex] = *pPort->pRxReg;
pPort->i2cIndex++;
pPort->pConBits->ACKDT = (pPort->i2cIndex == pPort->readSize); // NACK on last byte
pPort->pConBits->ACKEN = 1;
pPort->i2cState = I2C_STATE_READ_ACK;
}
break;
case I2C_STATE_READ_ACK:
if(!pPort->pConBits->ACKEN)
{ // done read ack
if(pPort->i2cIndex >= pPort->readSize)
{ // done receiving
i2cStop(pPort);
}
else
{
readNextByte(pPort);
}
}
break;
case I2C_STATE_STOP:
if(!pPort->pConBits->PEN)
{ // stop condition done
pPort->i2cState = I2C_STATE_IDLE;
*pPort->pConReg = I2CCON_OFF; // Turn off the I2C
}
break;
default:
pPort->i2cState = I2C_STATE_IDLE;
break;
}
}
