Hi,

We're using a REva starter kit with:
- a REva motherboard v3.3 with RLink
- a REva STM8S208RB daughter board.
- Windows XP, Service Pack 2

We're programming the SMT8S208RB chip using Ride7 and the RLink connector. The compiler is registered so we should be able to build 16kB binaries.

All the REva examples provided build and run fine and we've written several of our own programs that build and run on the Eval board ok as well. However, we have one program that fails to build without giving any compiler or linker error messages - it looks like the compiler just crashes during the build and we get a message from Windows that says:

"ST7-STM8 C compiler has encountered an error and has to close."

Without any error messages from the compiler or linker it's a pretty difficult problem to debug. At first we thought it could be a file size problem - if we remove a small amount of code the program compiles and runs fine. Although this seems strange since we are nowhere near our 16kB limit.

There might also be a clue in the code we need to remove for the build to succeed. Below is a segment of the program. When the while loop is included as written, the compiler crashes. When we remove some of the else-if statements that have no commands inside e.g.

else if ((u8)(_RxMessage.Data[0]) == COMMAND_RC){

}

then the build works.

We've finally come to the conclusion that it is a problem with the compiler optimisation level. Again, if we include the while loop as written and reduce the compiler optimisation level from 3 to 2 then the build is successful.

Is there an obvious problem with these else-if statements that we've missed? What is the compiler optimisation trying to do with them? And would you expect the compiler to have a more graceful exit than just crashing?

Or could it be something other than compiler optimization that's causing the compiler crash??

Cheers
Claire

Problematic code:

while( ( CAN_MessagePending() ) < 1 );

CAN_Receive(&_RxMessage);

//Enter powerdown
if ((u8)(_RxMessage.Data[0]) == COMMAND_PD){

}

//Read ADC
else if ((u8)(_RxMessage.Data[0]) == COMMAND_ADC){
if ((u8)(_RxMessage.Data[1]) == 03){

//IO: ADC
Config_ADC_POT();

/*Get conversion value*/
conversionValue = ADC2_GetConversionValue();

/*Display conversion value on LCD*/
sprintf(LCD_str,"conversion value is %u",conversionValue);
LCD_Display_string(LCD_str);

/*Send CAN message*/
//transmitMailbox = CAN_SendData(COMMAND_ADC,0,conversionValue,0,0,0,0,0);
TxBoardID[0] = COMMAND_ADC;
TxBoardID[2] = conversionValue;
transmitMailbox = CAN_SendData(&TxBoardID[0]);

ADC2_DeInit();
}
else if ((u8)(_RxMessage.Data[1]) == 01){

//IO: ADC
Config_ADC_INP1();

/*Get conversion value*/
conversionValue = ADC2_GetConversionValue();

/*Display conversion value on LCD*/
sprintf(LCD_str,"conversion value is %u",conversionValue);
LCD_Display_string(LCD_str);

/*Send CAN message*/
//transmitMailbox = CAN_SendData(COMMAND_ADC,0,conversionValue,0,0,0,0,0);
TxBoardID[0] = COMMAND_ADC;
TxBoardID[2] = conversionValue;
transmitMailbox = CAN_SendData(&TxBoardID[0]);

ADC2_DeInit();
}
}

//Set DAC
else if ((u8)(_RxMessage.Data[0]) == COMMAND_DAC){

//setHV();
}

//Start In-Application programming
else if ((u8)(_RxMessage.Data[0]) == COMMAND_IAP){

}

//Fires test pulser
else if ((u8)(_RxMessage.Data[0]) == COMMAND_TP){

}

//Set row and column address
else if ((u8)(_RxMessage.Data[0]) == COMMAND_RC){

}

//Enable or disable HV bits
else if ((u8)(_RxMessage.Data[0]) == COMMAND_HV){

//enableHV();
}

//Return board ID
else if ((u8)(_RxMessage.Data[0]) == COMMAND_ID){

SendID();
}

//Turn on either red or green LED
else if ((u8)(_RxMessage.Data[0]) == COMMAND_LED){

}

//Return version number
else if ((u8)(_RxMessage.Data[0]) == COMMAND_VER){

}

}