microchip-application-pec930-pec930_sdk

VinP (Input-plus type of the Comparator) support 4 I/O sources

I/O 0 ~ 4 type
- PEC930
  - I/O 0: PA8
  - I/O 1: PA11
  - I/O 2: PA14
  - I/O 3: PA15
VinM (Input-minus type of the Comparator) only support 1 I/O source
- COMP_0: PA6
- COMP_1: PA12

Use interrupt/polling mode

// at main.c
/**
 *  + Use polling mode when CONIFG_USE_COMP_INTERRUPT = 0
 *  + Use interrupt mode when CONIFG_USE_COMP_INTERRUPT = 1
 */
#define CONIFG_USE_COMP_INTERRUPT           0

Select the target COMP module

// at main.c
/**
 *  Use COMP0 or COMP1
 *  ps. Use the COMP0 when unmark
 *      Use the COMP1 when mark
 */
#define CONFIG_USE_COMP0

Select the target I/O type of VinP

// at main.c
/**
 *  Select the target I/O type of VinP
 *  + Use I/O 0 as VinP if CONIFG_TERGET_COMP_VinP_IO_IDX is 0
 *  + Use I/O 1 as VinP if CONIFG_TERGET_COMP_VinP_IO_IDX is 1
 *  + Use I/O 2 as VinP if CONIFG_TERGET_COMP_VinP_IO_IDX is 2
 *  + Use I/O 3 as VinP if CONIFG_TERGET_COMP_VinP_IO_IDX is 3
 */
#define CONIFG_TERGET_COMP_VinP_IO_IDX      0

Select the interrupt types

COMP triggers the rising event when VinP > VinM

COMP triggers the falling event when VinP < VinM

// at main.c
/**
 *  Configure status flags of COMP
 *  + COMP_IE_Falling
 *  + COMP_IE_Rising
 */
#define CONFIG_COMP_WATCH_STATE         (COMP_IE_Rising | COMP_IE_Falling)

Operation flow

Step 1. Connect the I/O of VinP (CONIFG_TERGET_COMP_VinP_IO_IDX) and VinM with an external device (e.g. power support) which provide difference voltage
Step 2. Respectively, set the specific voltage to external device (e.g. power support) to link the I/O of VinP and VinM
Step 3. Modify the VinP voltage of external device (e.g. power support)
Step 4. Observe the message has match the relation of VinP and VinM or not

Log

Use serial port with baudrate 115200, 8bit, no parity check.

Polling mode

modify VinP voltage with external device

Dec 19 2025 16:19:55
COMP0 compares the voltage from I/O
   COMP Vin+ = PA8
   COMP Vin- = PA6
  The target status (Rising/Falling) of COMP

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

  @COMP Event
  Get (Falling edge) Vin+ < Vin-

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

  @COMP Event
  Get (Falling edge) Vin+ < Vin-

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

Interrupt mode

modify VinP voltage with external device

Rising and Falling events

Dec 19 2025 15:27:53
COMP0 compares the voltage from I/O
   COMP Vin+ = PA8
   COMP Vin- = PA6
  The target status (Rising/Falling) of COMP

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

  @COMP Event
  Get (Falling edge) Vin+ < Vin-

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

  @COMP Event
  Get (Falling edge) Vin+ < Vin-

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

Rising event

Dec 19 2025 16:16:33
COMP0 compares the voltage from I/O
   COMP Vin+ = PA8
   COMP Vin- = PA6
  The target status (Rising/-) of COMP

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

  @COMP Event
  Get (Rising edge) Vin+ > Vin-

Falling event

Dec 19 2025 16:18:40
COMP0 compares the voltage from I/O
   COMP Vin+ = PA8
   COMP Vin- = PA6
  The target status (-/Falling) of COMP

  @COMP Event
  Get (Falling edge) Vin+ < Vin-

  @COMP Event
  Get (Falling edge) Vin+ < Vin-

  @COMP Event
  Get (Falling edge) Vin+ < Vin-