Other Parts Discussed in Thread: HALCOGEN
Hi,
I am having some problems to get the tms570 transmiting with I2C with interruptions mode.
The situation is the following:
-First, I tested the I2C communication with the "example_i2c_pcf8570.c" example avaiable in halcogen( my slave device is also a memory with the same configuration). It worked fine, so I can say that with polling mode is everything correct.
-After that, I analyzed the "example_i2cInterrupt_Communication.c" to see what should I change to switch from polling mode to interrupt mode( I deducted that there was no need to make a change), I made the needed changes in halcogen for making the reception with interrupts and I runned the program. It worked fine, so with RX the interrupts everything was correct.
-Then, I tried with the TX in interrupt mode. and it didn't work.
The problem is the following:
-I use i2cSend(), and I can see how it use the interrupt, and it sends correctly the packages. However , when it comes to the next function, while(i2cIsBusBusy(i2cREG1) == true), it gets stuck there(it did not happened with the polling mode)
-The most annoying thing is that if I run the program from the begining, it always reach the point of getting stuck, but if instead of running continuosly, o run making steps, it does not get stucked, and it can keep on advancing in the program, and everything will work fine.
The main function is the next one:
int main(void)
{
/* USER CODE BEGIN (3) */
int repeat = 0; int delay =0;
/* I2C Init as per GUI
* Mode = Master - Transmitter
* baud rate = 100KHz
* Count = 10
* Bit Count = 8bit
*/
_enable_interrupt_();
i2cInit();
///////////////////////////////////////////////////////////////
// Master Transfer Functionality //
///////////////////////////////////////////////////////////////
/* Configure address of Slave to talk to */
i2cSetSlaveAdd(i2cREG1, PCF8570_ADDRESS);
/* Set direction to Transmitter */
/* Note: Optional - It is done in Init */
i2cSetDirection(i2cREG1, I2C_TRANSMITTER);
/* Configure Data count */
/* Data Count + 2 ( Word Address) */
i2cSetCount(i2cREG1, DATA_COUNT + 2);
/* Set mode as Master */
i2cSetMode(i2cREG1, I2C_MASTER);
/* Set Stop after programmed Count */
i2cSetStop(i2cREG1);
/* Transmit Start Condition */
i2cSetStart(i2cREG1);
/* Send the Word Address */
i2cSendByte(i2cREG1, Slave_Word_address);
i2cSendByte(i2cREG1, Slave_Word_address);
/* Tranmit DATA_COUNT number of data in Polling mode */
i2cSend(i2cREG1, DATA_COUNT, TX_Data_Master);
/* Wait until Bus Busy is cleared */
while(i2cIsBusBusy(i2cREG1) == true); //THE PROBLEM HAPPENS HERE
/* Wait until Stop is detected */
while(i2cIsStopDetected(i2cREG1) == 0);
/* Clear the Stop condition */
i2cClearSCD(i2cREG1);
/* Simple Dealya before starting Next Block */
/* Depends on how quick the Slave gets ready */
for(delay=0;delay<100000;delay++);
///////////////////////////////////////////////////////////////
// Master Receive Functionality //
///////////////////////////////////////////////////////////////
/*****************************************/
//// Setup Slave to receving the data
/*****************************************/
/* wait until MST bit gets cleared, this takes
* few cycles after Bus Busy is cleared */
while(i2cIsMasterReady(i2cREG1) != true);
/* Configure address of Slave to talk to */
i2cSetSlaveAdd(i2cREG1, PCF8570_ADDRESS);
/* Set direction to Transmitter */
/* Note: Optional - It is done in Init */
i2cSetDirection(i2cREG1, I2C_TRANSMITTER);
/* Configure Data count */
/* Slave address + Word address write operation before reading */
i2cSetCount(i2cREG1, Receive_data_setup);
/* Set mode as Master */
i2cSetMode(i2cREG1, I2C_MASTER);
/* Set Stop after programmed Count */
i2cSetStop(i2cREG1);
/* Transmit Start Condition */
i2cSetStart(i2cREG1);
/* Send the Word Address */
i2cSendByte(i2cREG1, Slave_Word_address);
i2cSendByte(i2cREG1, Slave_Word_address);
/* Wait until Bus Busy is cleared */
while(i2cIsBusBusy(i2cREG1) == true);
/* Wait until Stop is detected */
while(i2cIsStopDetected(i2cREG1) == 0);
/* Clear the Stop condition */
i2cClearSCD(i2cREG1);
/*****************************************/
//// Start receving the data From Slave
/*****************************************/
/* wait until MST bit gets cleared, this takes
* few cycles after Bus Busy is cleared */
while(i2cIsMasterReady(i2cREG1) != true);
/* Configure address of Slave to talk to */
i2cSetSlaveAdd(i2cREG1, PCF8570_ADDRESS);
/* Set direction to receiver */
i2cSetDirection(i2cREG1, I2C_RECEIVER);
/* Configure Data count */
/* Note: Optional - It is done in Init, unless user want to change */
i2cSetCount(i2cREG1, DATA_COUNT);
/* Set mode as Master */
i2cSetMode(i2cREG1, I2C_MASTER);
/* Set Stop after programmed Count */
i2cSetStop(i2cREG1);
/* Transmit Start Condition */
i2cSetStart(i2cREG1);
/* Tranmit DATA_COUNT number of data in Polling mode */
i2cReceive(i2cREG1, DATA_COUNT, RX_Data_Master);
/* Wait until Bus Busy is cleared */
while(i2cIsBusBusy(i2cREG1) == true);
/* Wait until Stop is detected */
while(i2cIsStopDetected(i2cREG1) == 0);
/* Clear the Stop condition */
i2cClearSCD(i2cREG1);
asm(" nop");
asm(" nop");
asm(" nop");
while(1);
}
What is happening?What should I do to fix the problem?
Ander
