cyclic adc (CADC) example?

[petermeerwald]

Hello,

how do the CADC_Xxx() functions relate to the ADC16_Xxx() functions provided by the KSDK?

when to use which?

is there example code available for CADC?

thanks, p.

[Alice_Yang]

Hello Peter,

About the CADC example , please refer to here :  ....\KSDK_1.1.0\doc\Kinetis SDK v.1.1 API Reference Manual.pdf   ->  6.3.5 CADC Call diagram , this example illutrates how to use the  CADC driver.

Best Regards,

Alice

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[petermeerwald]

ADCA_IRQn is not defined in the KSDK, how is this supposed to work?

...KSDK_1.1.0/platform/drivers/src/cyclicAdc/fsl_cadc_common.c:42:59: error: 'ADC_ERR_IRQn' undeclared here (not in a function)

const IRQn_Type g_cadcErrIrqId[HW_ADC_INSTANCE_COUNT] = { ADC_ERR_IRQn };

                                                           ^

...KSDK_1.1.0/platform/drivers/src/cyclicAdc/fsl_cadc_common.c:43:61: error: 'ADCA_IRQn' undeclared here (not in a function)

const IRQn_Type g_cadcConvAIrqId[HW_ADC_INSTANCE_COUNT] = { ADCA_IRQn };

                                                             ^

...KSDK_1.1.0/platform/drivers/src/cyclicAdc/fsl_cadc_common.c:44:61: error: 'ADCB_IRQn' undeclared here (not in a function)

const IRQn_Type g_cadcConvBIrqId[HW_ADC_INSTANCE_COUNT] = { ADCB_IRQn };

                                                             ^

[petermeerwald]

ADCA_IRQn and ADCB_IRQn may correspond to the values ADC0_IRQn, ADC1_IRQn defined in KSDK_1.1.0/platform/CMSIS/Include/device/MK64F12

but ADC_ERR_IRQn still is a mystery :smileyconfused:

[Alice_Yang]

Hello Peter ,

From the Kinetis SDK API Reference Manual , 6.3.2 CADC Driver model building

"

CADC module has two ADC converters, ConvA and ConvB, which are the two

independent sample and hold (S/H) circuits. They can work simultaneously or individually for each

conversion. The driver provides APIs to configure each converter separately.

"

So i think the ADCA_IRQn is the interrupt for ConvA, ADCB_IRQn is for ConvB.

And the CADC interrupt , you can see here : 6.3.4 CADC Interrupt .

And you can see , there is little information about CADC , so in my opinion , i recommend you use the ADC16 .

Also , in the KSDK-PE project , there have “fsl_adc12” component , we can directly use it .

Have a great day,
Alice

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[petermeerwald]

Thanks Alice, I've given up on CADC, for ADC16 I'm aware of the examples.
I conclude that CADC support is broken/unusable in KSDK 1.1.

[petermeerwald]

Thanks Alice, seen that. It's still not clear what the CADC is, the MCU's reference manual does not mention it.