topic Re: HSADC on KV58F in Kinetis Microcontrollers

HSADC on KV58F

a8Chcx — Tue, 15 May 2018 20:01:43 GMT

Hi,

I am using the sequence conversion sample to test HSADC on KV58F and works fine...

Then, I want to use the scan end interrupt in stead of polling. I can't make the interrupt to work.

When I use software to trigger the conversion and I can see the scanA end already generated, but no the interrupt routine is called...

Could you tell me why? How to make the interrupt to work?

Thanks,

Christie

Re: HSADC on KV58F

Robin_Shen — Thu, 17 May 2018 09:12:23 GMT

Hi Christie,

You may need to add below codes:

void HSADC0_CCA_IRQHandler(void)

{
HSADC_ClearStatusFlags(DEMO_HSADC_BASEADDR, kHSADC_ConverterAEndOfScanFlag);

}

EnableIRQ(HSADC0_CCA_IRQn);

HSADC_EnableInterrupts(DEMO_HSADC_BASEADDR, kHSADC_ConverterAEndOfScanInterruptEnable);

Best Regards,

Robin

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Re: HSADC on KV58F

a8Chcx — Thu, 17 May 2018 11:48:23 GMT

Hi Robin,

I did the same as what you said and can't trigger the scan end interrupt.

1) Then I add

" HSADC_EnableSampleResultReadyInterrupts(INETVU_HSADC0_BASEADDR, 0x0400, true);" for the last channel(11)

and it works.

2) If I disable "HSADC_EnableInterrupts(DEMO_HSADC_BASEADDR, SADC_ConverterAEndOfScanInterruptEnable);"

and it works as well...

I do not know if I use "scanEndInterrupt" in sequence scan? And what is your suggestion?

Thanks,

Christie

Re: HSADC on KV58F

Robin_Shen — Mon, 21 May 2018 07:13:31 GMT

Would you please tell me which channel are you using? HSADC0A or HSADC0B

If you connect external signal to PTE3, then you may need to :

void HSADC0_CCB_IRQHandler(void)

{
HSADC_ClearStatusFlags(DEMO_HSADC_BASEADDR, kHSADC_ConverterBEndOfScanFlag);

}

EnableIRQ(HSADC0_CCB_IRQn);

HSADC_EnableInterrupts(DEMO_HSADC_BASEADDR, kHSADC_ConverterBEndOfScanInterruptEnable);

The Conversion complete interrupts and Scan interrupts are different. Please read "41.6 Interrupts" in KV5XP144M240RM.

HSADC_EnableInterrupts can be used to enable Conversion complete interrupts.

HSADC_EnableSampleResultReadyInterrupts is used to enable Scan interrupts.

Best Regards,

Robin

Re: HSADC on KV58F

a8Chcx — Tue, 22 May 2018 12:31:15 GMT

Hi Robin,

I connect as follows:

HSADC0A ch0-->Pin18

HSADC0A ch1-->Pin19

HSADC0A ch2-->Pin27

HSADC0A ch3-->Pin28

HSADC0A ch4-->Pin37

HSADC0A ch5-->Pin38

HSADC0A ch6-->Pin23

HSADC0A ch7-->Pin24

HSADC0B ch3-->Pin82

HSADC0B ch4-->Pin45

HSADC0B ch5-->Pin46

I am using the sequential scan.

If I enable "HSADC_EnableInterrupts(DEMO_HSADC_BASEADDR, SADC_ConverterAEndOfScanInterruptEnable);",

the interrupt will not be generated. But I can see there is the scan end status if I check the state register.

Only way to generate the interrupt is enable any sample interrupt by using " HSADC_EnableSampleResultReadyInterrupts(INETVU_HSADC0_BASEADDR, 0x0400, true);"

I do not know why the scan end interrupt does not work in this case?

Thanks,

Christie

Re: HSADC on KV58F

a8Chcx — Mon, 28 May 2018 16:17:45 GMT

Hi Robin,

Do you have any update on this?

Please let me know what you find?

Thanks,

Christie