topic Re: cannot disable I2C interrupt in MKE02Z using PE in Processor Expert Software

cannot disable I2C interrupt in MKE02Z using PE

gschelotto — Thu, 28 Apr 2016 11:43:02 GMT

Hi,

I've disabled I2C_LDD interrupt as shown

Then generate the PE code, compile and debug. Finally I set a breakpoint in the I2C tx event routine and the execution halts as shown

This is a non expected result. How can I disable these rx/tx I2C interrupts?

regards,

gaston

Re: cannot disable I2C interrupt in MKE02Z using PE

marek_neuzil — Fri, 29 Apr 2016 07:00:43 GMT

Hello Gaston,

When the interrupt service is disabled the Main() function is called in the application. This function calls events that are enabled. See the following part of the source code of the Main() function:

. . .

if ((DeviceDataPrv->EventMask & LDD_I2C_ON_MASTER_BLOCK_SENT) != 0x00U) {

CI2C1_OnMasterBlockSent(DeviceDataPrv->UserData); /* Invoke OnMasterBlockSent event */

}

. . .

If you want to disable calling of the event you must use the SetEventMask() function of the I2C_LDD component.

For example:

SetEventMask(MyI2CPtr, 0); /* disable all events */

Best Regards,

Marek Neuzil

Re: cannot disable I2C interrupt in MKE02Z using PE

gschelotto — Fri, 29 Apr 2016 07:58:08 GMT

Hello Marek,

Thank you. Now the Event calling is disabled but I cannot transmit I2C data anymore. Even using the Main() function as suggested in I2C_LDD Help on Component for Sending/Receiving data in the MASTER mode, without interrupt service (polling)

Here's my I2C 2-byte sending routine

// check I2C bus
timeout = TCA9555_I2C_TIMEOUT;
do{
     timeout--;
     Error = CI2C1_CheckBus(TCA9555Struct.handle, &BusState);
}
while(BusState != LDD_I2C_IDLE && timeout && Error == ERR_OK);
if(Error != ERR_OK || timeout == 0)
     return ERR_FAILED;
timeout = TCA9555_I2C_TIMEOUT;
buf[1] = reg.data[0];
buf[0] = TCA9555_CONFIG_REG0;
// Send I2C address plus 1 bytes to the I2C bus with a stop condition
Error = CI2C1_MasterSendBlock(TCA9555Struct.handle, &buf, 2U, LDD_I2C_SEND_STOP);
do{
     timeout--;
     CI2C1_Main(TCA9555Struct.handle);
} while(!TCA9555Struct.dataTransmittedFlg && timeout);    // Wait until data is sent
if(Error != ERR_OK || timeout == 0)
     return ERR_FAILED;
else
     TCA9555Struct.dataTransmittedFlg = FALSE;

Do you perceive something wrong?

regards,

gaston

Re: cannot disable I2C interrupt in MKE02Z using PE

marek_neuzil — Fri, 24 Jun 2016 16:56:34 GMT

Hello Gaston,

I have checked your code but I only see possible issue in the timeout. There is not any timer used and the loop can be executed very fast, i.e. there is not guaranteed any real timeout by the following loop:

do{

timeout--;

CI2C1_Main(TCA9555Struct.handle);

} while(!TCA9555Struct.dataTransmittedFlg && timeout); // Wait until data is sent

Best Regards,

Marek Neuzil

Re: cannot disable I2C interrupt in MKE02Z using PE

gschelotto — Mon, 27 Jun 2016 10:19:31 GMT

Hello Marek,

Here's the PE typical usage example:

volatile bool DataReceivedFlg = FALSE;
volatile bool DataTransmittedFlg = FALSE; 
uint8_t OutData[4] = {0x00U, 0x01U, 0x02U, 0x03U}; /* Initialization of output data buffer */ 
uint8_t InpData[16]; 
LDD_TError Error; 
LDD_TDeviceData *MyI2CPtr; 
void main(void) {
     MyI2CPtr = I2C2_Init(NULL); /* Initialization of I2C2 component */ /* Configure I2C BUS device(e.g. RTC) - Write Operation */ 
     Error = I2C2_MasterSendBlock(MyI2CPtr, OutData, 4U, LDD_I2C_SEND_STOP);
      while (!DataTransmittedFlg) { /* Wait until OutData are transmitted */
          I2C2_Main(MyI2CPtr); 
     } 
     DataTransmittedFlg = FALSE; /* Read configuration of I2C BUS device(e.g. RTC) - Read Operation */ 
     OutData[0] = 0x00U; /* Initialization of OutData buffer */ 
     Error = I2C2_MasterSendBlock(MyI2CPtr, OutData, 1U, LDD_I2C_NO_SEND_STOP); 
     while (!DataTransmittedFlg) { /* Wait until OutData are transmitted */ 
          I2C2_Main(MyI2CPtr); 
     } 
     DataTransmittedFlg = FALSE; 
     Error = I2C2_MasterReceiveBlock(MyI2CPtr, InpData, 16U, LDD_I2C_SEND_STOP); 
     while (!DataReceivedFlg) { /* Wait until InpData are received */ 
          I2C2_Main(MyI2CPtr);
     } 
     DataReceivedFlg = FALSE; 
     for(;;) {} 
}

The problem is DataTransmittedFlg is not changed to true by Events (I2C interrupts disabled) nor I2C_Main function. So the execution is stuck at the first while()

regards,

gaston