Hi team,
Here're some issues from the customer may need your help:
When using the ADC Interrupts of the 2800X families:
The 2800x family has four interrupts, ADCINT1, ADCINT2, ADCINT3, ADCINT4.
1. When using the ADCINT1 interrupt, the following 3 tests were performed:
A. When using ADCA1 of the PIE interrupt vector table as the interrupt entry, the interrupt program is working properly, Led_FLASH pin flip time: 17.2us, 80 times.
PieVectTable.ADCA1_INT = &adc_A1ISR; // Function for ADCA interrupt 1
IER |= M_INT1;//T0 ADCINT1
PieCtrlRegs.PIEIER1.bit.INTx1 = 1;// ADCINT1
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Disable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 3; // Select SOC on up-count
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.bit.CMPA = 430; // Set compare A value to 2048 counts
EPwm1Regs.TBPRD = 862; // Set period to 4096 counts
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Freeze counter
AdcaRegs.ADCSOC0CTL.bit.CHSEL = 7; // SOC0 will convert pin A1
// 0:A0 1:A1 2:A2 3:A3
// 4:A4 5:A5 6:A6 7:A7
// 8:A8 9:A9 A:A10 B:A11
// C:A12 D:A13 E:A14 F:A15
AdcaRegs.ADCSOC0CTL.bit.ACQPS = 9; // Sample window is 10 SYSCLK cycles
AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 5; // Trigger on ePWM1 SOCA
AdcaRegs.ADCINTSEL1N2.bit.INT1SEL = 0; // End of SOC1 will set INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1E = 1; // Enable INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1CONT = 0; //Discontinuous
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; // Make sure INT1 flag is cleared
The timer function starts the ePWM conversion for 25 ms
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // Unfreeze, and enter up count mode
ADC1 interrupt function
__interrupt void adc_A1ISR(void)
{
LED_FLASH=1;
Current.Sum+=AdcaResultRegs.ADCRESULT1;
if(++Current.ConversionCount==80)
{
Current.ConversionCount=0;
Current.Data=(Current.Sum/80);
Current.Sum=0;
EALLOW;
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Unfreeze, and enter up count mode
EDIS;
}
//
// Clear the interrupt flag
//
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;
//
// Check if overflow has occurred
//
if(1 == AdcaRegs.ADCINTOVF.bit.ADCINT1)
{
AdcaRegs.ADCINTOVFCLR.bit.ADCINT1 = 1; //clear INT1 overflow flag
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; //clear INT1 flag
}
//
// Acknowledge the interrupt
//
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
B. When using ADCC1 of the PIE interrupt vector table as the interrupt entry, the interrupt program does not run and the interrupt cannot be entered.
PieVectTable.ADCC1_INT = &adc_C1ISR; // Function for ADCC interrupt 1
IER |= M_INT1;//T0 ADCINT1
PieCtrlRegs.PIEIER1.bit.INTx3 = 1;// ADCINT1
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Disable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 3; // Select SOC on up-count
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.bit.CMPA = 430; // Set compare A value to 2048 counts
EPwm1Regs.TBPRD = 862; // Set period to 4096 counts
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Freeze counter
AdcaRegs.ADCSOC0CTL.bit.CHSEL = 7; // SOC0 will convert pin A1
// 0:A0 1:A1 2:A2 3:A3
// 4:A4 5:A5 6:A6 7:A7
// 8:A8 9:A9 A:A10 B:A11
// C:A12 D:A13 E:A14 F:A15
AdcaRegs.ADCSOC0CTL.bit.ACQPS = 9; // Sample window is 10 SYSCLK cycles
AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 5; // Trigger on ePWM1 SOCA
AdcaRegs.ADCINTSEL1N2.bit.INT1SEL = 0; // End of SOC1 will set INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1E = 1; // Enable INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1CONT = 0; //discontinous
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; // Make sure INT1 flag is cleared
The timer function starts the ePWM conversion for 25 ms
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // Unfreeze, and enter up count mode
ADC1 interrupt function
__interrupt void adc_C1ISR(void)
{
LED_FLASH=1;
Current.Sum+=AdcaResultRegs.ADCRESULT1;
if(++Current.ConversionCount==80)
{
Current.ConversionCount=0;
Current.Data=(Current.Sum/80);
Current.Sum=0;
EALLOW;
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Unfreeze, and enter up count mode
EDIS;
}
//
// Clear the interrupt flag
//
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;
//
// Check if overflow has occurred
//
if(1 == AdcaRegs.ADCINTOVF.bit.ADCINT1)
{
AdcaRegs.ADCINTOVFCLR.bit.ADCINT1 = 1; //clear INT1 overflow flag
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; //clear INT1 flag
}
//
// Acknowledge the interrupt
//
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
C. When using ADCA2 of the PIE interrupt vector table as the interrupt entry, the interrupt program does not run and the interrupt cannot be entered.
PieVectTable.ADCA2_INT = &adc_A2ISR; // Function for ADCA interrupt 1
IER |= M_INT10; //ADCINT1
PieCtrlRegs.PIEIER10.bit.INTx2 = 1;// ADCINT1
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Disable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 3; // Select SOC on up-count
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.bit.CMPA = 430; // Set compare A value to 2048 counts
EPwm1Regs.TBPRD = 862; // Set period to 4096 counts
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Freeze counter
AdcaRegs.ADCSOC0CTL.bit.CHSEL = 7; // SOC0 will convert pin A1
// 0:A0 1:A1 2:A2 3:A3
// 4:A4 5:A5 6:A6 7:A7
// 8:A8 9:A9 A:A10 B:A11
// C:A12 D:A13 E:A14 F:A15
AdcaRegs.ADCSOC0CTL.bit.ACQPS = 9; // Sample window is 10 SYSCLK cycles
AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 5; // Trigger on ePWM1 SOCA
AdcaRegs.ADCINTSEL1N2.bit.INT1SEL = 0; // End of SOC1 will set INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1E = 1; // Enable INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT1CONT = 0; //discontinous
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; // Make sure INT1 flag is cleared
The timer function starts the ePWM conversion for 25 ms
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // Unfreeze, and enter up count mode
ADC1 interrupt function
__interrupt void adc_A2ISR(void)
{
LED_FLASH=1;
Current.Sum+=AdcaResultRegs.ADCRESULT1;
if(++Current.ConversionCount==80)
{
Current.ConversionCount=0;
Current.Data=(Current.Sum/80);
Current.Sum=0;
EALLOW;
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Unfreeze, and enter up count mode
EDIS;
}
//
// Clear the interrupt flag
//
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;
//
// Check if overflow has occurred
//
if(1 == AdcaRegs.ADCINTOVF.bit.ADCINT1)
{
AdcaRegs.ADCINTOVFCLR.bit.ADCINT1 = 1; //clear INT1 overflow flag
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1; //clear INT1 flag
}
//
// Acknowledge the interrupt
//
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
2. When using the ADCINT2 interrupt, the following two tests were performed:
a. When using ADCA1 of the PIE interrupt vector table as the interrupt entry, the interrupt program does not run and the interrupt cannot be entered.
PieVectTable.ADCA1_INT = &adc_A1ISR; // Function for ADCA interrupt 1
IER |= M_INT1;//T0 ADCINT1
PieCtrlRegs.PIEIER1.bit.INTx1 = 1;// ADCINT1
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Disable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 3; // Select SOC on up-count
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.bit.CMPA = 430; // Set compare A value to 2048 counts
EPwm1Regs.TBPRD = 862; // Set period to 4096 counts
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Freeze counter
AdcaRegs.ADCSOC0CTL.bit.CHSEL = 7; // SOC0 will convert pin A1
// 0:A0 1:A1 2:A2 3:A3
// 4:A4 5:A5 6:A6 7:A7
// 8:A8 9:A9 A:A10 B:A11
// C:A12 D:A13 E:A14 F:A15
AdcaRegs.ADCSOC0CTL.bit.ACQPS = 9; // Sample window is 10 SYSCLK cycles
AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 5; // Trigger on ePWM1 SOCA
AdcaRegs.ADCINTSEL1N2.bit.INT2SEL = 0; // End of SOC1 will set INT2 flag
AdcaRegs.ADCINTSEL1N2.bit.INT2E = 1; // Enable INT1 flag
AdcaRegs.ADCINTSEL1N2.bit.INT2CONT = 0; //discontinous
AdcaRegs.ADCINTFLGCLR.bit.ADC2NT1 = 1; // Make sure INT2 flag is cleared
The timer function starts the ePWM conversion for 25 ms
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // Unfreeze, and enter up count mode
ADC1 interrupt function
__interrupt void adc_A1ISR(void)
{
LED_FLASH=1;
Current.Sum+=AdcaResultRegs.ADCRESULT1;
if(++Current.ConversionCount==80)
{
Current.ConversionCount=0;
Current.Data=(Current.Sum/80);
Current.Sum=0;
EALLOW;
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Unfreeze, and enter up count mode
EDIS;
}
//
// Clear the interrupt flag
//
AdcaRegs.ADCINTFLGCLR.bit.ADCINT2 = 1;
//
// Check if overflow has occurred
//
if(1 == AdcaRegs.ADCINTOVF.bit.ADCINT2)
{
AdcaRegs.ADCINTOVFCLR.bit.ADCINT2 = 1; //clear INT2 overflow flag
AdcaRegs.ADCINTFLGCLR.bit.ADCINT2 = 1; //clear INT2 flag
}
//
// Acknowledge the interrupt
//
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
b. When using ADCA2 of the PIE interrupt vector table as the interrupt entry, the interrupt program can run, but the result is not correct: the LED_FLASH pin is flipped for 20 ms (17.2us is set):
PieVectTable.ADCA2_INT = &adc_A2ISR; // Function for ADCA interrupt 1
IER |= M_INT10; //ADCINT1
PieCtrlRegs.PIEIER10.bit.INTx2 = 1;// ADCINT1
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Disable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 3; // Select SOC on up-count
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.bit.CMPA = 430; // Set compare A value to 2048 counts
EPwm1Regs.TBPRD = 862; // Set period to 4096 counts
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Freeze counter
AdcaRegs.ADCSOC0CTL.bit.CHSEL = 7; // SOC0 will convert pin A1
// 0:A0 1:A1 2:A2 3:A3
// 4:A4 5:A5 6:A6 7:A7
// 8:A8 9:A9 A:A10 B:A11
// C:A12 D:A13 E:A14 F:A15
AdcaRegs.ADCSOC0CTL.bit.ACQPS = 9; // Sample window is 10 SYSCLK cycles
AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 5; // Trigger on ePWM1 SOCA
AdcaRegs.ADCINTSEL1N2.bit.INT2SEL = 0; // End of SOC1 will set INT2 flag
AdcaRegs.ADCINTSEL1N2.bit.INT2E = 1; // Enable INT2 flag
AdcaRegs.ADCINTSEL1N2.bit.INT2CONT = 0; //discontinous
AdcaRegs.ADCINTFLGCLR.bit.ADCINT2 = 1; // Make sure INT1 flag is cleared
The timer function starts the ePWM conversion for 25 ms
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // Unfreeze, and enter up count mode
ADC1 interrupt function
__interrupt void adc_A2ISR(void)
{
LED_FLASH=1;
Current.Sum+=AdcaResultRegs.ADCRESULT1;
if(++Current.ConversionCount==80)
{
Current.ConversionCount=0;
Current.Data=(Current.Sum/80);
Current.Sum=0;
EALLOW;
EPwm1Regs.ETSEL.bit.SOCAEN = 0; // Enable SOC on A group
EPwm1Regs.TBCTL.bit.CTRMODE = 3; // Unfreeze, and enter up count mode
EDIS;
}
//
// Clear the interrupt flag
//
AdcaRegs.ADCINTFLGCLR.bit.ADCINT2 = 1;
//
// Check if overflow has occurred
//
if(1 == AdcaRegs.ADCINTOVF.bit.ADCINT2)
{
AdcaRegs.ADCINTOVFCLR.bit.ADCINT2 = 1; //clear INT1 overflow flag
AdcaRegs.ADCINTFLGCLR.bit.ADCINT2 = 1; //clear INT1 flag
}
//
// Acknowledge the interrupt
//
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
Issues:
1) How to configure the interrupt program to work properly as test 1C above?
2) how to configure the interrupt program to run properly as test 2a above?
3) how to configure the interrupt program to run properly as test 2b above? Interrupts are currently available, but not working properly.
Could you help check this case? Thanks.
Best Regards,
Cherry
