lpcmp_round_robin#
Overview#
The LPCMP round robin example is a simple demonstration program that uses the LPCMP driver to help users get started quickly. In this example, users need to specify which port and channel to fix, and which channels to select as checker channels. Before doing the comparison, it is necessary to preset the comparison result of each checker channel with the fixed channel. If any results of the comparator are different from the preset value, an interrupt will be triggered, and the information of the triggered channel will be printed on the terminal after changing the input voltage of checker channels.
Supported Boards#
FRDM-MCXA153
Hardware requirements
Type-C USB cable
FRDM-MCXA153 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
P2_2 J2-9 channel 0 1 input > DAC output
P1_3 J6-3 channel 1 0 input < DAC output
P1_4 J1-2 channel 2 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 0(CMP0_IN0, P2_2, J2-9), channel 1(CMP0_IN1, P1_3, J6-3) and channel 2(CMP0_IN2, P1_4, J1-2), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x05U.
Set the input voltage of channel 0, channel 1 and channel 2 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a Type-C USB cable between the host PC and the MCU-Link port(J15) on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
FRDM-MCXA156
Hardware requirements
Type-C USB cable
FRDM-MCXA156 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN0/P2_2 J2-9 channel 0 1 input > DAC output
CMP0_IN1/P1_3 J6-3 channel 1 0 input < DAC output
CMP0_IN2/P1_4 J2-1 channel 2 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 0(CMP0_IN0, P2_2, J2-9), channel 1(CMP0_IN1, P1_3, J6-3) and channel 2(CMP0_IN2, P1_4, J2-1), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x05U.
Set the input voltage of channel 0, channel 1 and channel 2 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
FRDM-MCXA346
Hardware requirements
Type-C USB cable
FRDM-MCXA346 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN1/P1_3 J2-17 channel 0 1 input > DAC output
CMP0_IN2/P1_4 J2-7 channel 1 0 input < DAC output
CMP0_IN3/P1_0 J4-10 channel 2 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 1(CMP0_IN1, P1_3, J2-17), channel 2(CMP0_IN2, P1_4, J2-7) and channel 3(CMP0_IN3, P1_0, J4-10), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 1, channel 2 and channel 3 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
channel 3 comparison result is different from preset value!
FRDM-MCXN947
Hardware requirements
Type-C USB cable
FRDM-MCXN947 Board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
P1_0 J2-17 channel 0 0 input < DAC output
P4_2 J1-4 channel 4 1 input > DAC output
P4_3 J1-2 channel 5 0 input < DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 0(CMP0_IN0, P1_0, J2-17), channel 4(CMP0_IN1, P4_2, J1-4) and channel 5(CMP0_IN2, P4_3, J1-2), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x10U.
Set the input voltage of channel 0, channel 4 and channel 5 to be less than, greater than and less than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect the type-c and mini USB cable between the PC host and the USB ports on the board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 4 comparison result is different from preset value!
channel 5 comparison result is different from preset value!
FRDM-MCXN947T
Hardware requirements
Type-C USB cable
FRDM-MCXN947T Board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
P1_0 J2-17 channel 0 0 input < DAC output
P4_2 J1-4 channel 4 1 input > DAC output
P4_3 J1-2 channel 5 0 input < DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 0(CMP0_IN0, P1_0, J2-17), channel 4(CMP0_IN1, P4_2, J1-4) and channel 5(CMP0_IN2, P4_3, J1-2), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x10U.
Set the input voltage of channel 0, channel 4 and channel 5 to be less than, greater than and less than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect the type-c and mini USB cable between the PC host and the USB ports on the board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 4 comparison result is different from preset value!
channel 5 comparison result is different from preset value!
MCX-N5XX-EVK
Hardware requirements
Mini/micro USB cable
MCX-N5XX-EVK Board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
P1_0 J2-17 channel 0 0 input < DAC output
P4_2 J1-4 channel 4 1 input > DAC output
P4_3 J1-2 channel 5 0 input < DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 0(CMP0_IN0, P1_0, J2-17), channel 4(CMP0_IN1, P4_2, J1-4) and channel 5(CMP0_IN2, P4_3, J1-2), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x10U.
Set the input voltage of channel 0, channel 4 and channel 5 to be less than, greater than and less than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect the micro and mini USB cable between the PC host and the USB ports on the board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 4 comparison result is different from preset value!
channel 5 comparison result is different from preset value!
MCX-N9XX-EVK
Hardware requirements
Mini/micro USB cable
MCX-N9XX-EVK Board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
P1_0 J2-17 channel 0 0 input < DAC output
P4_2 J1-4 channel 4 1 input > DAC output
P4_3 J1-2 channel 5 0 input < DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 0(CMP0_IN0, P1_0, J2-17), channel 4(CMP0_IN1, P4_2, J1-4) and channel 5(CMP0_IN2, P4_3, J1-2), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x10U.
Set the input voltage of channel 0, channel 4 and channel 5 to be less than, greater than and less than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect the micro and mini USB cable between the PC host and the USB ports on the board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 4 comparison result is different from preset value!
channel 5 comparison result is different from preset value!
FRDM-MCXE31B
Hardware requirements
Type-C USB cable
FRDM-MCXE31B board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
PTA0 J9-3 channel 0 0 input < DAC output
PTA1 J9-5 channel 1 1 input > DAC output
PTA2 J2-9 channel 2 0 input < DAC output
This example uses LPCMP1 instance, the fixed port is plusMuxPort, the fixed channel is internal DAC module, and the checker channels are channel 0(CMP1_IN0, PTA0, J9-3), channel 4(CMP1_IN1, PTA1, J9-5) and channel 5(CMP1_IN2, PTA2, J2-9) in miusMuxPort.
Set the input voltage of channel 0, channel 4 and channel 5 to be less than, greater than and less than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a type-c USB cable between the host PC and the MCU-Link USB port (J13) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the MCU-Link terminal: The DAC reference comes from 1.2 V PMC bandgap reference in this project, note that the 1.2 V internal reference voltage is not available in Standby mode. The checker channel’s pre-set value is 0x2U.
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
FRDM-MCXE32B
Hardware requirements
Type-C USB cable
FRDM-MCXE32B board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
PTA0 J9-3 channel 0 0 input < DAC output
PTA1 J9-5 channel 1 1 input > DAC output
PTA2 J2-9 channel 2 0 input < DAC output
This example uses LPCMP1 instance, the fixed port is plusMuxPort, the fixed channel is internal DAC module, and the checker channels are channel 0(CMP1_IN0, PTA0, J9-3), channel 1(CMP1_IN1, PTA1, J9-5) and channel 2(CMP1_IN2, PTA2, J2-9) in miusMuxPort.
Set the input voltage of channel 0, channel 1 and channel 2 to be less than, greater than and less than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a type-c USB cable between the host PC and the MCU-Link USB port (J13) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the MCU-Link terminal: The DAC reference comes from 1.2 V PMC bandgap reference in this project, note that the 1.2 V internal reference voltage is not available in Standby mode. The checker channel’s pre-set value is 0x2U.
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
FRDM-MCXA174
Hardware requirements
Type-C USB cable
FRDM-MCXA174 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN1/P1_3 J2-17 channel 0 1 input > DAC output
CMP0_IN2/P1_4 J2-7 channel 1 0 input < DAC output
CMP0_IN3/P1_0 J4-10 channel 2 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 1(CMP0_IN1, P1_3, J2-17), channel 2(CMP0_IN2, P1_4, J2-7) and channel 3(CMP0_IN3, P1_0, J4-10), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 1, channel 2 and channel 3 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
channel 3 comparison result is different from preset value!
FRDM-MCXA344
Hardware requirements
Type-C USB cable
FRDM-MCXA344 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN1/P1_3 J2-17 channel 0 1 input > DAC output
CMP0_IN2/P1_4 J2-7 channel 1 0 input < DAC output
CMP0_IN3/P1_0 J4-10 channel 2 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 1(CMP0_IN1, P1_3, J2-17), channel 2(CMP0_IN2, P1_4, J2-7) and channel 3(CMP0_IN3, P1_0, J4-10), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 1, channel 2 and channel 3 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
channel 3 comparison result is different from preset value!
FRDM-MCXA266
Hardware requirements
Type-C USB cable
FRDM-MCXA266 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN1/P1_3 J2-17 channel 0 1 input > DAC output
CMP0_IN2/P1_4 J2-7 channel 1 0 input < DAC output
CMP0_IN3/P1_0 J4-10 channel 2 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 1(CMP0_IN1, P1_3, J2-17), channel 2(CMP0_IN2, P1_4, J2-7) and channel 3(CMP0_IN3, P1_0, J4-10), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 1, channel 2 and channel 3 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
channel 3 comparison result is different from preset value!
FRDM-MCXA366
Hardware requirements
Type-C USB cable
FRDM-MCXA366 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN1/P1_3 J2-17 channel 0 1 input > DAC output
CMP0_IN2/P1_4 J2-7 channel 1 0 input < DAC output
CMP0_IN3/P1_0 J4-10 channel 2 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 1(CMP0_IN1, P1_3, J2-17), channel 2(CMP0_IN2, P1_4, J2-7) and channel 3(CMP0_IN3, P1_0, J4-10), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 1, channel 2 and channel 3 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 1 comparison result is different from preset value!
channel 2 comparison result is different from preset value!
channel 3 comparison result is different from preset value!
FRDM-MCXA577
Hardware requirements
Type-C USB cable
FRDM-MCXA577 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN2/P1_4 R132 channel 2 1 input > DAC output
CMP0_IN4/P2_2 J8-23 channel 4 0 input < DAC output
CMP0_IN5/P2_3 J9-14 channel 5 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 2(CMP0_IN2, P1_4, R132), channel 4(CMP0_IN4, P2_2, J8-23) and channel 5(CMP0_IN5, P2_3, J9-14), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 0, channel 1 and channel 2 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 2 comparison result is different from preset value!
channel 4 comparison result is different from preset value!
channel 5 comparison result is different from preset value!
FRDM-MCXC162
Hardware requirements
Type-C USB cable
FRDM-MCXC162 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN0/P2_2 J2-9 channel 0 1 input > DAC output
CMP0_IN1/P1_3 J2-3 channel 1 0 input < DAC output
CMP0_IN3/P1_0 J2-5 channel 3 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 0(CMP0_IN1, P2_2, J2-19), channel 1(CMP0_IN1, P1_3, J2-3) and channel 3(CMP0_IN3, P1_0, J2-5), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 1, channel 2 and channel 3 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 0 comparison result is different from preset value!
channel 1 comparison result is different from preset value!
channel 3 comparison result is different from preset value!
FRDM-MCXA287
Hardware requirements
Type-C USB cable
FRDM-MCXA287 board
Personal Computer
Board settings
Pin Name Board Location checker channel number pre-set value trigger
CMP0_IN2/P1_4 J9-24 channel 2 1 input > DAC output
CMP0_IN4/P2_2 J8-23 channel 4 0 input < DAC output
CMP0_IN5/P2_3 J9-14 channel 5 1 input > DAC output
This example uses LPCMP0 instance, the fixed port is plusMuxPort, the fixed channel is channel 7(Internal DAC module), and the checker channels are channel 2(CMP0_IN2, P1_4, J9-24), channel 4(CMP0_IN4, P2_2, J8-23) and channel 5(CMP0_IN5, P2_3, J9-14), in miusMuxPort. The LPCMP’s internal DAC module output voltage signal(half of VREFI), the channel’s pre-set value is 0x0AU.
Set the input voltage of channel 0, channel 1 and channel 2 to be greater than, less than and greater than the output voltage of the DAC respectively. The comparison results of the three channels are different from the pre-set value. So the interrupt occurred and the terminal will print corresponding channel changed information.
Prepare the Demo
Connect a USB Type-C cable between the host PC and the MCU-Link USB port on the target board.
Open a serial terminal on PC for the serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, following information can be seen on the OpenSDA terminal:
LPCMP RoundRobin Example.
channel 2 comparison result is different from preset value!
channel 4 comparison result is different from preset value!
channel 5 comparison result is different from preset value!