S32KのトピックRe: HOW TO USE ADC

HOW TO USE ADC

letseatorange — Wed, 31 May 2017 00:33:44 GMT

I want to use one AD channel,like ad13 ,contine to collect 100 data, how should i deal with

Re: HOW TO USE ADC

danielmartynek — Wed, 31 May 2017 08:50:43 GMT

Hi,

There is an example code in Design Studio for ADC you can refer to.

Regards,

Daniel

Re: HOW TO USE ADC

letseatorange — Wed, 31 May 2017 08:59:48 GMT

It's only can get one value ,how can i continue to get more valeu ,and then store in an array。

Re: HOW TO USE ADC

danielmartynek — Thu, 01 Jun 2017 16:36:03 GMT

Hi,

You can enable continuous conversion in ADC_SC3[ADCO] register. Then a new conversion will be automatically triggered on completion of the previous one on the same channel (or configuration) until it is aborted (see 38.5.4.3 Aborting conversions). When each conversion is done, ADC interrupt can be triggered, so you can collect data in the interrupt handler.

To reduce load of the CPU, the conversion can be initiated with hardware trigger through PDB or TRGMUX. Also, the ADC can trigger a DMA request on conversion completion.

There is an example code Example S32K144 PDB ADC trigger DMA ISR S32DS, which can help.

Regards,

Daniel

Re: HOW TO USE ADC

letseatorange — Tue, 22 Aug 2017 03:07:41 GMT

Hi,support team,now i want to use DMA to transfere some datas from Peripherals ADC0 to memory.but i don't use PDB.

I use a certain sample frequency to sample about 50 datas, then using DMA to transfere data to memory, I use sdk to complete, but found that data can not be transferred to memory, how should I do? thanks!