Other NXP ProductsのトピックRe: CMP peripheral usage issues

CMP peripheral usage issues

Baraku — Tue, 13 Jun 2023 06:28:51 GMT

Hello,

I'm pretty new to this, so bear with me.
the following actions are from an example I have, and I'm trying to verify this against the datasheet, however I haven't found any resemblance .

I'm using mk10dn512M10 (this model does not appear in the catalog, which I'm having hard time finding any documentation for this model.

where I'm trying to use the CMP peripheral to compare between :
1. a pin on my MCU which connected to a battery
2. reference voltage from DAC

I configured the DAC to send output voltage on DAC output (3v) which is said to be connected to CMP1 input internally.

using this template:

// Configure the CMP1 input pin

// Assuming the pin is on Port C, adjust accordingly for other ports

PORTC_PCR[cmpInputPin] = PORT_PCR_MUX(7); // Set the pin as the CMP1 input

// Configure CMP1

CMP1_CR0 = CMP_CR0_FILTER_CNT(0x00); // Adjust filter count if needed

CMP1_CR1 = CMP_CR1_EN_MASK | CMP_CR1_OPE_MASK | CMP_CR1_PMODE_MASK; // Enable the comparator, set high-speed mode

CMP1_MUXCR = (CMP1_MUXCR & ~CMP_MUXCR_PSEL_MASK) | CMP_MUXCR_PSEL(cmpInputPin); // Set the CMP1 positive input to the specified pin

I tried to read the CMP with :

if (CMP1_SCR & CMP_SCR_COUT_MASK)

but I don't seem to have any change occuring at the CMP COUT.

I would appreciate help in understanding what is a general flow of the CMP peripheral as well.

thank you.

Re: CMP peripheral usage issues

Robin_Shen — Thu, 15 Jun 2023 01:52:38 GMT

mk10dn512M10 seems not a correct part number. Do you mean MK10DN512VLQ10 or MK10DN512ZVLQ10?

If you are using MK10DN512VLQ10 (no ‘Z’ character: PRODUCTION mask set), please download SDK_2_2_0_MK10DN512xxx10.zip. And you can test twrk60d100m_driver_examples_cmp_interrupt and twrk60d100m_driver_examples_cmp_polling examples.

If you are using MK10DN512ZVLQ10(‘Z’ character: INITIAL Production mask set), please refer to the answer in silicon revision for K20 family

Best Regards,
Robin
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Re: CMP peripheral usage issues

Baraku — Tue, 20 Jun 2023 08:41:34 GMT

Hi Robin,

thank you for the assistance.

to be honest I managed to solve this one myself, and can use the CMP on my board.

I still would like to view the example you offered, however the link you sent (for the zip file) just leads me to the welcome screen ( https://mcuxpresso.nxp.com/en/welcome)
can't seem to find the specific file you mentioned via the search either, it would just let me to select filters there, not sure where do I find the actual examples/files.

thanks again.

Re: CMP peripheral usage issues

Robin_Shen — Tue, 20 Jun 2023 09:06:00 GMT

I'm glad to hear it's resolved.
1. click Select Development Board
2. input MK10DN512VLQ10 at Search for Hardware
3. select MK10DN512xxx10
4. click Build MCUXpresso SDK v2.0.0