dsc_cmp_polling#
Overview#
The CMP polling Example shows the simplest way to use CMP driver and help user with a quick start.
In this example, user should indicate an input channel to capture a voltage signal (can be controlled by user) as the CMP’s positive channel input. On the negative side, the internal 6-bit DAC is used to generate the fixed voltage about half value of reference voltage.
When running the project, change the input voltage of user-defined channel, then the comparator’s output would change between logic one and zero when the user’s voltage crosses the internal DAC’s value. The endless loop in main() function would detect the logic value of comparator’s output, and change the LED. The LED would be turned on when the compare output is logic one, or turned off when zero.
Supported Boards#
MC56F80000-EVK
Hardware requirements
Micro USB cable
MC56F80000-EVK board
Personal Computer
Board hardware common setting
Power setting:
Connect J8 pin2 and pin3 Connect J6 pin1 and pin2 Connect J5 pin1 and pin2
Reset pin setting:
Connect J11 pin2 and pin3
Debugger setting:
Connect J13 pin 1-2, 3-4, 5-6, 7-8
Board settings
Connect J20 1-2.
Prepare the Demo
Connect USB cable between the host PC and the J12 USB port on the target board. It setups Multilink and COM port in PC device manager.
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 with Multilink debug configuration.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
CMP polling Example
Please connect CMPA_IN0 to VDD firstly and then GND
Then change CMP analog input, and watch the change of LED. - CMPA_IN0(J2-11) connected to VCC = 3.3V(J2-20): LED RED on - CMPA_IN0(J2-11) connected to GND(J2-14): LED RED off
MC56F81000-EVK
Hardware requirements
2 x Micro USB cable
MC56F81000-EVK board
Personal Computer
Board hardware common setting
Power setting:
Connect J8 pin2 and pin3 Connect J5 pin1 and pin2 Connect J6 pin1 and pin2
Onboard PnE U-MultiLink debugger setting:
Connet J11 pin2 and pin3 Connect J13 pin 1-2, 3-4, 5-6, 7-8, to setup onboard debugger PnE U-MultiLink. Note: when use external debugger(connected to J10), leave all J13 pins open.
Board settings
Connect J20 1-2.
Prepare the Demo
Connect USB cable between the host PC and the USB(J26) port on the target board to setup USB to UART bridge.
Connect USB cable between the host PC and the USB(J12) port on the target baord to setup mulitlink debugger.
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 with PnE U-MultiLink debug configuration.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo. Please be noted default FCF(flash configuration field) makes the MCU boot from flash.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
CMP polling Example
Please connect CMPA_IN0 to VDD firstly and then GND
Then change CMP analog input, and watch the change of LED. - CMPA_IN0(J2-11) connected to VCC = 3.3V(J2-20): LED RED on - CMPA_IN0(J2-11) connected to GND(J2-14): LED RED off
MC56F83000-EVK
Hardware requirements
Micro USB cable
MC56F83000-EVK board
Personal Computer
Board hardware common setting
Power setting:
Connect J19 pin2 and pin3 Connect J12 pin1 and pin2 Connect J13 pin1 and pin2 Connect J15 pin1 and pin2 Connect J16 pin2 and pin3 Connect J17 pin1 and pin2
Onboard OSJTAG debugger setting:
Leave J5 open Leave J6 open Note: J6 is only used(connected) when firmware update for onboard debugger OSJTAG. Connect J11 pin 1-2, 3-4, 5-6, 7-8, to setup onboard debugger OSJTAG. Note: when use external debugger(connected to J10), leave all J11 pins open.
Board settings
No special settings are required.
Prepare the Demo
Connect USB cable between the host PC and the JM60 USB(J8) port on the target board. It setups OSJTAG and COM port in PC device manager.
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 with OSJTAG debug configuration.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo. Please be noted that default FCF(flash configuration field) setting makes MCU boot from bootloader. So after reset button press, it will wait 5s(wait in bootloader) to run the application code.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
CMP polling Example
Please connect CMPA_IN0 to VDD firstly and then GND
Then change CMP analog input, and watch the change of LED. - CMPA_IN0(J2-5) connected to VCC = 3.3V(J2-20): LED RED on - CMPA_IN0(J2-5) connected to GND(J2-14): LED RED off
TWR-MC56F8200
Hardware requirements
Mini USB cable
TWR-MC56F8200 board
Personal Computer
Board hardware common setting
HW reworkd(workaround):
Connect J18(the mini USB port) pin4 and pin5. Note: This is due to HW design error, correct setting should be: J18 pin4 left empty and pin5 connected GND.
Power setting:
Connect J11 pin1 and pin2 Connect J6 pin1 and J7 pin2
UART setting:
Connect J8 pin3 and pin4 Connect J9 pin3 and pin4
Onboard OSJTAG debugger setting:
Connect J20 pin1 and pin2. Leave J17 open. Note: J17 is only used(connected) when firmware update for onboard debugger OSJTAG. Connect J21 pin 1-2, 3-4, 5-6, 7-8, to setup onboard debugger OSJTAG. Note: when use external debugger(connected to J14), leave all J21 pins open
Board settings
No special settings are required.
Prepare the Demo
Connect USB cable between the host PC and the JM60 USB(J18) port on the target board. It setups OSJTAG and COM port in PC device manager.
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 with OSJTAG debug configuration.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
CMP polling Example
Please connect CMPA_IN0 to VDD firstly and then GND
Then change CMP analog input, and watch the change of LED. - CMPA_IN0(J501-12) connected to VDD = 3.3V: LED 8 on - CMPA_IN0(J501-12) connected to GND(J501-3): LED 8 off
TWR-MC56F8400
Hardware requirements
Mini USB cable
TWR-MC56F8400 board
Personal Computer
Board hardware common setting
Power setting:
Connect J11 pin1 and pin2 Connect J6 pin1 and J7 pin2
UART setting:
Connect J8 pin3 and pin4 Connect J9 pin3 and pin4
Onboard OSJTAG debugger setting:
Connect J20 pin1 and pin2. Leave J17 open. Note: J17 is only used(connected) when firmware update for onboard debugger OSJTAG. Connect J21 pin 1-2, 3-4, 5-6, 7-8, to setup onboard debugger OSJTAG. Note: when use external debugger(connected to J14), leave all J21 pins open
Board settings
No special settings are required.
Prepare the Demo
Connect USB cable between the host PC and the JM60 USB(J18) port on the target board. It setups OSJTAG and COM port in PC device manager.
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 with OSJTAG debug configuration.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
CMP polling Example
Please connect CMPA_IN0 to VDD firstly and then GND
Then change CMP analog input, and watch the change of LED. - CMPA_IN0(J501-12) connected to VDD = 3.3V: LED 8 on - CMPA_IN0(J501-12) connected to GND(J501-3): LED 8 off