LPC MicrocontrollersのトピックLPC4088 dual AIN

LPC4088 dual AIN

Eggord — Fri, 11 Nov 2022 15:35:40 GMT

Hi All,

i have a LPC4088 and the Developer’s Kit board. I would like to get two AIN running. One works but if i just double the command it doesn't work:

pinmode_s ADC_IO = { .port = 0, .pin = 24, .mode = 1};

#define ADC LPC_ADC
#define ADC_CH 1
#define ADC_INTCH ADC_ADINTEN1
#define ADC_NVIC_IRQ ADC_IRQn

PINSEL_SetPinMode(ADC_IO.port, ADC_IO.pin, ADC_IO.mode);
PINSEL_SetAnalogPinMode(ADC_IO.port, ADC_IO.pin, true);

ADC_Init(ADC, 200000);
ADC_ChannelCmd(ADC, ADC_CH, ENABLE);
ADC_IntConfig(ADC, ADC_INTCH, ENABLE);

ADC_StartCmd(ADC, 1);

uint16_t val = ADC_ChannelGetData(ADC, ADC_CH);

So this is the relevant code for 1 channel. What i did is literally double the code and change the channel and naming a bit like:

#define ADC2 LPC_ADC
#define ADC_CH2 2
#define ADC_INTCH2 ADC_ADINTEN2
#define ADC_NVIC_IRQ2 ADC_IRQn

ADC_Init(ADC2, 200000);
ADC_ChannelCmd(ADC2, ADC_CH2, ENABLE);
ADC_IntConfig(ADC2, ADC_INTCH2, ENABLE);

ADC_StartCmd(ADC2, 1);

With breakpoints i know it stops right after i try to get the value of the first channel.

Does somebody has any idea what i do wrong?

Thanks!!

All the best,

Jan

Re: LPC4088 dual AIN

Alice_Yang — Mon, 14 Nov 2022 09:26:37 GMT

Hello @Eggord

Recommend you use the ADC driver under LPCopen.

And if still not work well, please describe it more detail. Is there no ADC data? Or the ADC result is not correct? How about the secondary channel work alone?

Alice

Re: LPC4088 dual AIN

Eggord — Tue, 10 Jan 2023 10:06:04 GMT

I got it working in December.

The solution was to use "ADC_BurstCmd(LPC_ADC,ENABLE);"

instead

ADC_StartCmd(ADC, 1);
ADC_StartCmd(ADC2, 1);

but now i have a different problem ;( but i will open a new topic for this

Thanks for your suggestions!!