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Hello,
We use the ezdspf28335c demo board for prototyping our project.
The program is running in debug mode.
In order to configure our interruptions, we modified the following TI files: "DSP2833x_DefaultIsr.c", "DSP2833x_DefaultIsr.h" and "DSP2833x_SWPrioritizedIsrLevels.h".
Here is our group priority levels:
#define G11PL 0 // SEQ1INT (ADC) #define G12PL 0 // SEQ2INT (ADC) #define G13PL 0 // reserved #define G14PL 0 // XINT1 (External) #define G15PL 0 // XINT2 (External) #define G16PL 0 // ADCINT (ADC) #define G17PL 1 // TINT0 (CPU Timer 0) #define G18PL 0 // WAKEINT (WD/LPM) #define G21PL 0 // EPWM1_TZINT (ePWM1 Trip) #define G22PL 0 // EPWM2_TZINT (ePWM2 Trip) #define G23PL 0 // EPWM3_TZINT (ePWM3 Trip) #define G24PL 0 // EPWM4_TZINT (ePWM4 Trip) #define G25PL 0 // EPWM5_TZINT (ePWM5 Trip) #define G26PL 0 // EPWM6_TZINT (ePWM6 Trip) #define G27PL 0 // reserved #define G28PL 0 // reserved #define G31PL 0 // EPWM1_INT (ePWM1 Int) #define G32PL 0 // EPWM2_INT (ePWM2 Int) #define G33PL 0 // EPWM3_INT (ePWM3 Int) #define G34PL 0 // EPWM4_INT (ePWM4 Int) #define G35PL 0 // EPWM5_INT (ePWM5 Int) #define G36PL 0 // EPWM6_INT (ePWM6 Int) #define G37PL 0 // reserved #define G38PL 0 // reserved #define G41PL 1 // ECAP1_INT (eCAP1 Int) #define G42PL 0 // ECAP2_INT (eCAP2 Int) #define G43PL 0 // ECAP3_INT (eCAP3 Int) #define G44PL 0 // ECAP4_INT (eCAP4 Int) #define G45PL 0 // ECAP5_INT (eCAP5 Int) #define G46PL 0 // ECAP6_INT (eCAP6 Int) #define G47PL 0 // reserved #define G48PL 0 // reserved #define G51PL 0 // EQEP1_INT (eQEP1 Int) #define G52PL 0 // EQEP2_INT (eQEP2 Int) #define G53PL 0 // reserved #define G54PL 0 // reserved #define G55PL 0 // reserved #define G56PL 0 // reserved #define G57PL 0 // reserved #define G58PL 0 // reserved #define G61PL 0 // SPIRXINTA (SPI-A) #define G62PL 0 // SPITXINTA (SPI-A) #define G63PL 0 // MRINTB (McBSP-B) #define G64PL 0 // MXINTB (McBSP-B) #define G65PL 0 // MRINTA (McBSP-A) #define G66PL 0 // MXINTA (McBSP-A) #define G67PL 0 // reserved #define G68PL 0 // reserved #define G71PL 0 // DINTCH1 (DMA) #define G72PL 0 // DINTCH2 (DMA) #define G73PL 0 // DINTCH3 (DMA) #define G74PL 0 // DINTCH4 (DMA) #define G75PL 0 // DINTCH5 (DMA) #define G76PL 0 // DINTCH6 (DMA) #define G77PL 0 // reserved #define G78PL 0 // reserved #define G81PL 0 // I2CINT1A (I2C-A) #define G82PL 0 // I2CINT2A (I2C-A) #define G83PL 0 // reserved #define G84PL 0 // reserved #define G85PL 1 // SCIRXINTC (SCI-C) #define G86PL 2 // SCITXINTC (SCI-C) #define G87PL 0 // reserved #define G88PL 0 // reserved #define G91PL 0 // SCIRXINTA (SCI-A) #define G92PL 0 // SCITXINTA (SCI-A) #define G93PL 0 // SCIRXINTB (SCI-B) #define G94PL 2 // SCITXINTB (SCI-B) #define G95PL 0 // ECAN0INTA (ECAN-A) #define G96PL 0 // ECAN1INTA (ECAN-A) #define G97PL 0 // ECAN0INTB (ECAN-B) #define G98PL 0 // ECAN1INTB (ECAN-B) #define G101PL 0 // reserved #define G102PL 0 // reserved #define G103PL 0 // reserved #define G104PL 0 // reserved #define G105PL 0 // reserved #define G106PL 0 // reserved #define G107PL 0 // reserved #define G108PL 0 // reserved #define G111PL 0 // reserved #define G112PL 0 // reserved #define G113PL 0 // reserved #define G114PL 0 // reserved #define G115PL 0 // reserved #define G116PL 0 // reserved #define G117PL 0 // reserved #define G118PL 0 // reserved #define G121PL 0 // XINT3 (External) #define G122PL 0 // XINT4 (External) #define G123PL 0 // XINT5 (External) #define G124PL 0 // XINT6 (External) #define G125PL 0 // XINT7 (External) #define G126PL 0 // reserved #define G127PL 0 // LVF (FPA32) #define G128PL 0 // LUF (FPA32) #define INT1PL 1 // Group1 Interrupts (PIEIER1) #define INT2PL 0 // Group2 Interrupts (PIEIER2) #define INT3PL 0 // Group3 Interrupts (PIEIER3) #define INT4PL 3 // Group4 Interrupts (PIEIER4) #define INT5PL 0 // Group5 Interrupts (PIEIER5) #define INT6PL 0 // Group6 Interrupts (PIEIER6) #define INT7PL 0 // reserved #define INT8PL 1 // reserved #define INT9PL 2 // Group9 Interrupts (PIEIER9) #define INT10PL 0 // reserved #define INT11PL 0 // reserved #define INT12PL 0 // reserved #define INT13PL 0 // XINT13 #define INT14PL 0 // INT14 (TINT2) #define INT15PL 0 // DATALOG #define INT16PL 0 // RTOSINT
We use SCI B, SCI C, ECAP1 and CPU timer 0 in our project.
The interrupts are enabled by:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
When we run the program, randomly, the program stops in the interrupt void INT_NOTUSED_ISR(void). Our problem seems to occur when we use an SCI at 2,3Mbit/s (BRR=1, LSPCLK=37.5MHz).
What is the typical approach to elucidate the cause of this ? I mean, is it possible to find which interrupt is raised, which causes the INT_NOTUSED_ISR to be called?
Is there a standard method to use the SCI without reaching the INT_NOTUSED_ISR interrupt at 2.3MBits/s?
Could it be due to the Debug mode?
English is not my mother tongue, so I apologize in advance for my English mistakes.
If i missed to explain important facts, don't hesitate to ask me some details.
Best regards
