有办法在不做POR的情况下重置线路吗？

大家好，我的第一篇文章，SOAPPACtiON。问题陈述：在I2C上的SDA线在一个随机周期之后变低，并且保持低直到POR。I2C直到SDA保持低工作良好。M22通过250mm的引线连接到PIC。有没有办法在不做POR的情况下重置线路？HypSpRealAlxIIII2C函数＝2C1BRG＝39；TribbTe.TrISB9＝1；/SDA TrbBITS.TrISB8＝1；//SCL OSCCon＝0x000；//CKDIV= 0x0700；ReCopon＝0x000；//此函数将初始化I2C（1）外围设备。/现在我们将初始化I2C外围设备为主模式，没有转换速率/控制，让外围设备关掉。I2C1CONC= 0x1200；I2C1RCV= 0xMUN；I2C1Trn＝0x000；现在/我们现在可以启用外围I2C1CONC= 0x9200；//I2CEN，SCLREL，DISSLWNONDENT STARTI2C（空隙）{//此函数生成I2C启动条件，返回START.I2C1CONBITS.See＝1的状态/ /；/生成启动条件WHILE（I2C1CONBESS.SEN）；/ /等待开始条件返回（I2C1STATBITS。）；/ /可选地返回状态}未签名int Studi2C（空隙）{//此函数生成I2C停止条件，并返回STAT//STEP。I2C1CONBITS.PIN= 1；/ /生成停止条件（I2C1CONTITES。PEN）；/ /等待STOP返回（I2C1StATBATS.P）；//可选-返回状态}未签名int WrIeI2CyBuffor（无符号char字节）{///此函数将传递给函数//In的字节（I2C1STATBITS.TrSTAT）发送；/ /等待总线空闲I2C1Trn＝字节；//加载字节到I2C1传输缓冲器（I2C1STATBIT.T）BF）；/ /等待数据传输返回0；}无符号int IDLIE2C（空隙）{（I2C1STATBITS.TrSTAT）；/ /等待总线空闲返回0；}无符号int Wrave2C（无符号char控制字节，无符号char Load，未签名CHAR数据，未签名CHAR CNT）{un签署int错误代码；IDLeI2C.（））；/ /确保模块是空闲STARTI2c（）；//生成起始条件WreIe2CyBuffor（控件字节）；//写入控制字节IDLeI2C~（）；ErrOrCord= ACKStaseUE（；）//ACK ACSTATUSTORIGII2CYBULL（LoLADD）；//编写低地址IDLeI2C~（）；ErrOrCord= ACKSTATUSER（；）//ACK ACK STATUS WORIII2CY缓冲器（数据）；//写入数据IDLII2C~（）；Studii2C~（）；//启动停止条件返回（ErrOr码）；}



      以下为原文

    Hello Everybody,
My first post, so apologies in advance.

Problem Statement: SDA line on I2C goes low after a random period, and stays low until a POR. I2C up until the the SDA staying low works fine. The MD22 is connected to the PIC via 250mm leads.

Is there a way to reset the lines without doing a POR?
Thanks
Paul


initializeI2C Function
I2C1BRG = 39;
TRISBbits.TRISB9 = 1; // SDA
TRISBbits.TRISB8 = 1; // SCL

OSCCON = 0x0000;
//CLKDIV = 0x0700;
REFOCON = 0x0000;
//This function will initialize the I2C(1) peripheral.
//Now we will initialise the I2C peripheral for Master Mode, No Slew Rate
//Control, and leave the peripheral switched off.
I2C1CON = 0x1200;
I2C1RCV = 0x0000;
I2C1TRN = 0x0000;
//Now we can enable the peripheral
I2C1CON = 0x9200; // I2CEN, SCLREL, DISSLW



unsigned int StartI2C(void) {
//This function generates an I2C start condition and returns status
//of the Start.
I2C1CONbits.SEN = 1; //Generate Start COndition
while (I2C1CONbits.SEN); //Wait for Start COndition
return (I2C1STATbits.S); //Optionally return status
}

unsigned int StopI2C(void) {
//This function generates an I2C stop condition and returns status
//of the Stop.
I2C1CONbits.PEN = 1; //Generate Stop Condition
while (I2C1CONbits.PEN); //Wait for Stop
return (I2C1STATbits.P); //Optional - return status
}

unsigned int WriteI2C_Buffer(unsigned char byte) {
//This function transmits the byte passed to the function
//while (I2C1STATbits.TRSTAT); //Wait for bus to be idle
I2C1TRN = byte; //Load byte to I2C1 Transmit buffer
while (I2C1STATbits.TBF); //wait for data transmission
return 0;
}

unsigned int IdleI2C(void) {
while (I2C1STATbits.TRSTAT); //Wait for bus Idle
return 0;
}

unsigned int WriteI2C(unsigned char ControlByte, unsigned char LowAdd, unsigned char data, unsigned char cnt) {
unsigned int ErrorCode;
IdleI2C(); //Ensure Module is Idle
StartI2C(); //Generate Start COndition
WriteI2C_Buffer(ControlByte); //Write Control byte
IdleI2C();
ErrorCode = ACKStatus(); //Return ACK Status
WriteI2C_Buffer(LowAdd); //Write Low Address
IdleI2C();
ErrorCode = ACKStatus(); //Return ACK Status
WriteI2C_Buffer(data); //Write Data
IdleI2C();
StopI2C(); //Initiate Stop Condition
return (ErrorCode);
}