Tool/software:
environment： CCS12.7 sdk9.0.02 demo: adc_soc_software_am263x-lp_r5fss0-0 hardware: 2634lp red demo board
I modified the code in the example to facilitate observing the values of variables through debug mode at any time, thereby confirming whether my ADC configuration is correct.
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int main(void)
{
System_init();
Board_init();
adc_soc_software_main(NULL);
while(1);
// Board_deinit();
// System_deinit();
return 0;
}
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my pwm configuration:
EPWM_setEmulationMode(CONFIG_EPWM4_BASE_ADDR, EPWM_EMULATION_FREE_RUN);
EPWM_setClockPrescaler(CONFIG_EPWM4_BASE_ADDR, EPWM_CLOCK_DIVIDER_8, EPWM_HSCLOCK_DIVIDER_1);
EPWM_setTimeBasePeriod(CONFIG_EPWM4_BASE_ADDR, 12500);
EPWM_setPeriodLoadMode(CONFIG_EPWM4_BASE_ADDR, EPWM_PERIOD_SHADOW_LOAD);
EPWM_setTimeBaseCounter(CONFIG_EPWM4_BASE_ADDR, 0);
EPWM_setTimeBaseCounterMode(CONFIG_EPWM4_BASE_ADDR, EPWM_COUNTER_MODE_UP);
EPWM_enableInterrupt(CONFIG_EPWM4_BASE_ADDR);
EPWM_setInterruptSource(CONFIG_EPWM4_BASE_ADDR, EPWM_INT_TBCTR_ZERO, 0);
EPWM_setInterruptEventCount(CONFIG_EPWM4_BASE_ADDR, 1);
EPWM_lockRegisters(CONFIG_EPWM4_BASE_ADDR, 0);
EPWM_disableInterrupt(CONFIG_EPWM4_BASE_ADDR);
SOC_xbarSelectInterruptXBarInputSource(CSL_CONTROLSS_INTXBAR_U_BASE, 0, ( INT_XBAR_EPWM4_INT ), 0, 0, 0, 0, 0, 0);
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my adc configuration
ADC_setPrescaler(CONFIG_ADC0_BASE_ADDR, ADC_CLK_DIV_4_0);
ADC_setMode(CONFIG_ADC0_BASE_ADDR, ADC_RESOLUTION_12BIT, ADC_MODE_SINGLE_ENDED);
ADC_setSOCPriority(CONFIG_ADC0_BASE_ADDR, ADC_PRI_ALL_ROUND_ROBIN);
ADC_setupSOC(CONFIG_ADC0_BASE_ADDR, 0, ADC_TRIGGER_SW_ONLY, ADC_CH_ADCIN0, 16);
ADC_enableConverter(CONFIG_ADC0_BASE_ADDR);
ClockP_usleep(500);
ADC_setInterruptPulseMode(CONFIG_ADC0_BASE_ADDR, ADC_PULSE_END_OF_CONV);
ADC_disableBurstMode(CONFIG_ADC0_BASE_ADDR);
ADC_setPrescaler(CONFIG_ADC1_BASE_ADDR, ADC_CLK_DIV_4_0);
ADC_setMode(CONFIG_ADC1_BASE_ADDR, ADC_RESOLUTION_12BIT, ADC_MODE_SINGLE_ENDED);
ADC_setSOCPriority(CONFIG_ADC1_BASE_ADDR, ADC_PRI_ALL_ROUND_ROBIN);
ADC_setupSOC(CONFIG_ADC1_BASE_ADDR, 0, ADC_TRIGGER_SW_ONLY, ADC_CH_ADCIN0, 16);
ADC_setupSOC(CONFIG_ADC1_BASE_ADDR, 1, ADC_TRIGGER_SW_ONLY, ADC_CH_ADCIN2, 16);
ADC_enableConverter(CONFIG_ADC1_BASE_ADDR);
ClockP_usleep(500);
ADC_setInterruptPulseMode(CONFIG_ADC1_BASE_ADDR, ADC_PULSE_END_OF_CONV);
ADC_disableBurstMode(CONFIG_ADC1_BASE_ADDR);
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void adc_soc_software_main(void *args)
{
HwiP_Params hwiPrms;
interruptFlg = 1;
interruptTrigTimes = 0;
adc_open();
pwm_open();
HwiP_Params_init(&hwiPrms);
/* Integrate with Syscfg */
hwiPrms.intNum = CSLR_R5FSS0_CORE0_CONTROLSS_INTRXBAR0_OUT_0;
hwiPrms.isPulse = TRUE;
hwiPrms.callback = &App_epwmIntrISR;
HwiP_construct(&gEpwmHwiObject, &hwiPrms);
EPWM_clearEventTriggerInterruptFlag(CONFIG_EPWM4_BASE_ADDR);
EPWM_enableInterrupt(CONFIG_EPWM4_BASE_ADDR);
}
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my interrupt ISR:
static void App_epwmIntrISR(void *handle)
{
EPWM_clearEventTriggerInterruptFlag(CONFIG_EPWM4_BASE_ADDR);
interruptTrigTimes = interruptTrigTimes + 1;
if (interruptFlg == 1)
{
interruptFlg = 2;
ADC_forceSOC(CONFIG_ADC0_BASE_ADDR, ADC_SOC_NUMBER0);
ADC_forceSOC(CONFIG_ADC1_BASE_ADDR, ADC_SOC_NUMBER0);
ADC_forceSOC(CONFIG_ADC1_BASE_ADDR, ADC_SOC_NUMBER2);
}
else if (interruptFlg == 2)
{
interruptFlg = 1;
adcval1 = ADC_readResult(CONFIG_ADC0_RESULT_BASE_ADDR, ADC_SOC_NUMBER0);
adcval2 = ADC_readResult(CONFIG_ADC1_RESULT_BASE_ADDR, ADC_SOC_NUMBER0);
adcval3 = ADC_readResult(CONFIG_ADC1_RESULT_BASE_ADDR, ADC_SOC_NUMBER2);
}
}
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I use EPWM4 interrupt to software force trig ADC0IN0 & ADC1IN0 & ADC1IN2
Then I use an external power supply to supply 2.27V power to J3->23 & J3->24 & J7->67
then I get adcval1 = adcval2 = adcval3 ≈2907, which is correct.
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I change ADC0IN0 to ADC0IN2, Only three code modifications were made below
ADC_setupSOC(CONFIG_ADC0_BASE_ADDR, 0, ADC_TRIGGER_SW_ONLY, ADC_CH_ADCIN2, 16);
ADC_forceSOC(CONFIG_ADC0_BASE_ADDR, ADC_SOC_NUMBER2);
adcval1 = ADC_readResult(CONFIG_ADC0_RESULT_BASE_ADDR, ADC_SOC_NUMBER2);
Of course, I change connect J3->23 to J7->66
expect: adcval1 = adcval2 = adcval3 ≈2907
actual: adcval2 = adcval3 ≈2907 adcval1 = 0xff
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I change ADC0IN2 to ADC0IN3 again, Only three code modifications were made below
ADC_setupSOC(CONFIG_ADC0_BASE_ADDR, 0, ADC_TRIGGER_SW_ONLY, ADC_CH_ADCIN3, 16);
ADC_forceSOC(CONFIG_ADC0_BASE_ADDR, ADC_SOC_NUMBER3);
adcval1 = ADC_readResult(CONFIG_ADC0_RESULT_BASE_ADDR, ADC_SOC_NUMBER3);
I change connect J7->66 to J1->2
expect: adcval1 = adcval2 = adcval3 ≈2907
actual: adcval2 = adcval3 ≈2907 adcval1 = 0xff
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Why? My configuration error or anything about ADC priority?
