2.16 Comparator (CMP)
The CMP peripheral consists of five comparators and four Op Amps. The Op Amp Comparator module 4 does not have the associated Op Amp. Inputs for these comparators can be selected from I/O pins or the Control Digital-to-Analog Converter 3 (CDAC3).
Using The Library
CMP Peripheral library provides API's that can be used to perform below functionalities on the CMP peripheral.
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Initialize the CMP.
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Turn on and turn off the individual comparators inside the CMP peripheral.
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Register callback function for the five comparators inside the CMP peripheral.
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Get the status of individual comparator output
Library Interface
Comparator peripheral library provides the following interfaces:
Functions
| Name | Description |
|---|---|
| CMP_Initialize | Initializes CMP module of the device |
| CMP_1_CompareEnable | Turn on CMP1 |
| CMP_1_CompareDisable | Turn off CMP1 |
| CMP_2_CompareEnable | Turn on CMP2 |
| CMP_2_CompareDisable | Turn off CMP2 |
| CMP_3_CompareEnable | Turn on CMP3 |
| CMP_3_CompareDisable | Turn off CMP3 |
| CMP_4_CompareEnable | Turn on CMP4 |
| CMP_4_CompareDisable | Turn off CMP4 |
| CMP_5_CompareEnable | Turn on CMP5 |
| CMP_5_CompareDisable | Turn off CMP5 |
| CMP_StatusGet | Returns the output state of a comparator |
| CMP_1_CallbackRegister | Registers the function to be called from interrupt |
| CMP_2_CallbackRegister | Registers the function to be called from interrupt |
| CMP_3_CallbackRegister | Registers the function to be called from interrupt |
| CMP_4_CallbackRegister | Registers the function to be called from interrupt |
| CMP_5_CallbackRegister | Registers the function to be called from interrupt |
Data types and constants
| Name | Type | Description |
|---|---|---|
| CMP_STATUS_SOURCE | Enum | Denotes a specific comparator output status |
| CMP_CALLBACK | Typedef | Defines the function pointer data type and function signature for the CMP callback function |
Note: Not all APIs maybe implemented. See the specific device family
section for available APIs.