Kinetis MicrocontrollersのトピックRe: Some help needed for multiple acquisitions with ADC

Some help needed for multiple acquisitions with ADC

olivier_33 — Wed, 18 Dec 2013 06:25:37 GMT

Hello,

I am rather new to ARM microcontroller and despite the help on the ADC function and the messages in this forum, I find myself unable to run multiple acquisitions from my ADC.

I attached my project. I am working on FRDM Kinetis MKL05Z with CodeWarrior.

For one channel it is OK. For multiple channels I tried different solutions but without success.

Could someone give me some hints on what I am doing wrong?

Thanks in advance,

Oliver

Original Attachment has been moved to: Test_Project_V01.rar

Re: Some help needed for multiple acquisitions with ADC

Robin_Shen — Wed, 18 Dec 2013 14:00:14 GMT

Hi Olivier ,

1.The Cpu what you should select is MKL05Z32VFM4.

2.What do you mean in your ProcessorExpert.c // Method 2 for 2 channels defined separately - not working at all?

If you add

MyADCPtr = AD1_Init((LDD_TUserData *)NULL);

/* Initialize the device */

before for(;;) still will the PE_ISR(Cpu_Interrupt) happen?

3.the MeasuredValues[1] does not exist because your code below:

#define SAMPLE_GROUP_SIZE 1U

/* User includes (#include below this line is not maintained by Processor Expert) */

AD1_TResultData MeasuredValues[SAMPLE_GROUP_SIZE];

Best Regards

Robin

Re: Some help needed for multiple acquisitions with ADC

olivier_33 — Wed, 18 Dec 2013 17:34:18 GMT

Hi Robin,

Many thanks for your help.

I created this test project to remove all the unwanted code, but I forgot to define the processor.

I have now 1 method that works fine for the acquisition of multiple channels.

I initially used the first method: "Method 1 for 1 single channel"

In the Component Inspector for AD1, I had "Static Sample Groups" disabled.

I tried to initialise SAMPLE_GROUP_SIZE to 4.

I thought I could acquire the signal from the 2 channels successively in one acquisition but this didn't worked.

I am a bit rusty in programming and I need to train seriously!

With my best regards,

Olivier