Kinetis Microcontrollersのトピックerror ADC1

error ADC1

omendiola — Tue, 29 Sep 2015 17:13:33 GMT

Hi.

i want initialize ADC1 for MK22FN512VMP12, i write in SIM_SCGC6 for enable ADC1 Clock Gate Control, but when i write in ADC1_CFG1 or ADC1_SC1A for star a conversion, the program return a follow error.

///////////////////////////////////////////

Default_Handler:

b .

.size Default_Handler, . - Default_Handler

/* Macro to define default handlers. Default handler

* will be weak symbol and just dead loops. They can be

* overwritten by other handlers */

////////////////////////////////////////////

what is the problem? can you help me?

pd. Si alguien habla español se lo agradeceria mucho.

Re: error ADC1

kerryzhou — Wed, 30 Sep 2015 04:48:05 GMT

Hi omar mendiola,

How did you enable ADC1 in SIM_SCGC6? did you really set the ADC1 bit in the SIM_SCGC6?

I configure it like this:

SIM_SCGC6 |= SIM_SCGC6_ADC1_MASK;

ADC1_SC1A =0X1A;

ADC1_CFG1 =0;

The MCU works ok on my side, it didn't enter default handler.

If you still have problem, please paste your problem code, I would like to help you to check it.

Have a great day,
Jingjing

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Re: error ADC1

omendiola — Wed, 30 Sep 2015 14:09:21 GMT

hi jingjing

this is the code:

======================================

SIM_SCGC6 |= (1<<7);

__asm("NOP");

ADC1_CFG1 = 0b00011000;

__asm("NOP");

ADC1_SC2 = 0x00;

ADC1_SC1A = 19;

for(;;)

{

if(u32Test)

{

u32Test = ADC1_RA;

}

======================================

i first set up the ADC1, after i start a conversion in channel 19, but when i write in ADC1_CFG1 or any other register of ADC1, debug return the same error.

do you think that problem is into my MCU?

Re: error ADC1

kerryzhou — Thu, 08 Oct 2015 07:08:49 GMT

Hi omar mendiola,

If you want to write the ADC code, you can't just configure it like this, I suggest you refer to the KSDK K22 ADC sample code, please go to this link：

www.freescale.com/ksdk

Download the KSDK1.2.0, and install it, then you can find the ADC sample code from this path:

C:\Freescale\KSDK_1.2.0\examples\frdmk22f\driver_examples\adc16

Wish it helps you!

Have a great day,
Jingjing