S12 / MagniV MicrocontrollersのトピックRe: ADC conversion for S12ZVML128

ADC conversion for S12ZVML128

pratibhasurabhi — Fri, 20 Jan 2017 10:34:01 GMT

I have to do ADC conversion.

i am declaring ADC command list as ADC1CommandList[1][4] = {{0xC0,0x00,0x00,0x00}};

In initADC function i have initialized all required registers of ADC1.

I have created get ADC(uint8_t channel no) function , in this function I am filling command list with channel number(passed in argument of function) and after that i have triggered the restart event.Even after end of list interrupt flag in ADC1CONIF register gets set there is no result in ADCresult list.could you please provide me the solution for this?

Re: ADC conversion for S12ZVML128

RadekS — Mon, 23 Jan 2017 20:16:52 GMT

Hi PRATIBHA,

Please look at simple example code here:

https://community.nxp.com/docs/DOC-332475

I used ADC0FLWCTL_TRIG bit as a trigger for new ADC conversion.

Please be aware that loading commands from command list and storing results into result list is managed by internal DMA mechanism. Therefore the command and results lists must be aligned to the 4 byte boundary. For example:

volatile unsigned long adc0_cmdlist[NR_A_CH] __attribute__ ((aligned (4))); //max 256 bytes = 64 commands per 4-byte entries

volatile unsigned int adc0_results[NR_A_CH] __attribute__ ((aligned (4))); //max 128 bytes = 64 results per 2-byte entries

I hope it helps you.

Have a great day,
Radek

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Re: ADC conversion for S12ZVML128

pratibhasurabhi — Tue, 24 Jan 2017 05:03:16 GMT

I have referred the sample code you mentioned.

Please see the question regarding The ADC conversion which is asked by me on community.

And please tell me what is the mistake in that code?

Re: ADC conversion for S12ZVML128

RadekS — Tue, 24 Jan 2017 22:22:40 GMT

Hi PRATIBHA,

I suppose that you mean your thread here:

https://community.nxp.com/message/871165

Have a great day,
Radek