hi:
When I use F28020 ADC modul find some chennal cann't read ADC result .
set ADC register as follow:
extern void DSP28x_usDelay(unsigned long Count);
#define ADC_MACRO_INIT() \
\
DELAY_US(ADC_usDELAY); \
AdcRegs.ADCCTL1.all=ADC_RESET_FLAG; \
asm(" NOP "); \
asm(" NOP "); \
\
EALLOW; \
AdcRegs.ADCCTL1.bit.ADCBGPWD = 1; /* Power up band gap */ \
\
DELAY_US(ADC_usDELAY); /* Delay before powering up rest of ADC */ \
\
AdcRegs.ADCCTL1.bit.ADCREFSEL = 0; \
AdcRegs.ADCCTL1.bit.ADCREFPWD = 1; /* Power up reference */ \
AdcRegs.ADCCTL1.bit.ADCPWDN = 1; /* Power up rest of ADC */ \
AdcRegs.ADCCTL1.bit.ADCENABLE = 1; /* Enable ADC */ \
\
asm(" RPT#100 || NOP"); \
\
AdcRegs.ADCCTL1.bit.INTPULSEPOS=1; \
AdcRegs.ADCCTL1.bit.TEMPCONV=0; \
\
DELAY_US(ADC_usDELAY); \
\
/******* CHANNEL SELECT *******/ \
\
AdcRegs.ADCSOC0CTL.bit.CHSEL = 0; /*Dummy meas. avoid 1st sample issue Rev0 Picollo*/ \
AdcRegs.ADCSOC0CTL.bit.TRIGSEL = 5; /*temperture sample*/ \
AdcRegs.ADCSOC0CTL.bit.ACQPS = 6; \
\
AdcRegs.ADCSOC1CTL.bit.CHSEL = 9; /* ChSelect: ADC B4-> Phase A Current */ \
AdcRegs.ADCSOC1CTL.bit.TRIGSEL = 5; /* Set SOC0 start trigger on EPWM1A */ \
AdcRegs.ADCSOC1CTL.bit.ACQPS = 6; /* Set SOC0 S/H Window to 6+1 ADC Clock Cycles */ \
\
AdcRegs.ADCSOC2CTL.bit.CHSEL = 1; /* ChSelect: ADC B6-> Phase B Current */ \
AdcRegs.ADCSOC2CTL.bit.TRIGSEL = 5; \
AdcRegs.ADCSOC2CTL.bit.ACQPS = 6; \
\
AdcRegs.ADCSOC3CTL.bit.CHSEL = 15; /* ChSelect: ADC A1-> DC Bus Voltage */ \
AdcRegs.ADCSOC3CTL.bit.TRIGSEL = 5; \
AdcRegs.ADCSOC3CTL.bit.ACQPS = 6; \
\
AdcRegs.ADCSOC4CTL.bit.CHSEL = 15; /* ChSelect: ADC B7-> V Phase A */ \
AdcRegs.ADCSOC4CTL.bit.TRIGSEL = 5; \
AdcRegs.ADCSOC4CTL.bit.ACQPS = 6; \
\
AdcRegs.ADCSOC5CTL.bit.CHSEL = 14; /* ChSelect: ADC B6-> V Phase B */ \
AdcRegs.ADCSOC5CTL.bit.TRIGSEL = 5; \
AdcRegs.ADCSOC5CTL.bit.ACQPS = 6; \
\
AdcRegs.ADCSOC6CTL.bit.CHSEL = 13; /* ChSelect: ADC B5-> V Phase C */ \
AdcRegs.ADCSOC6CTL.bit.TRIGSEL = 5; \
AdcRegs.ADCSOC6CTL.bit.ACQPS = 6; \
\
AdcRegs.ADCSOC7CTL.bit.CHSEL = 3; /* ChSelect: ADC A4-> Low Side DC Bus Return Cur.*/ \
AdcRegs.ADCSOC7CTL.bit.TRIGSEL = 5; \
AdcRegs.ADCSOC7CTL.bit.ACQPS = 6; \
\
\
AdcRegs.ADCSOC8CTL.bit.CHSEL = 11; /* expend speed input*/ \
AdcRegs.ADCSOC8CTL.bit.TRIGSEL = 5; \
AdcRegs.ADCSOC8CTL.bit.ACQPS = 8; \
EDIS; \
\
\
/* Set up Event Trigger with CNT_zero enable for Time-base of EPWM1 */ \
EPwm1Regs.ETSEL.bit.SOCAEN = 1; /* Enable SOCA */ \
EPwm1Regs.ETSEL.bit.SOCASEL = 1; /* Enable CNT_zero event for SOCA */ \
EPwm1Regs.ETPS.bit.SOCAPRD = 1; /* Generate SOCA on the 1st event */ \
EPwm1Regs.ETCLR.bit.SOCA = 1; /* Clear SOCA flag */
obver , I set ADSOC3 and ADSOC4 same channel , but in ADCRESULT , has not same result.
ADC cofigurate is below:
and this is epwm soca registor :
obver , we can see ETFLG is 0x0004 , that mean is socA is set . .
but whe I cann't get result3 ?
please check it ,please please !
best regard
fuyz
