dsc_flexcan_interrupt_transfer#
Overview#
The flexcan_interrupt example shows how to use FlexCAN driver in none-blocking interrupt way:
In this example, 2 boards are connected through CAN bus. Endpoint A(board A) send a CAN Message to Endpoint B(board B) when user press space key in terminal. Endpoint B receive the message, print the message content to terminal and echo back the message. Endpoint A will increase the received message and waiting for the next transmission of the user initiated.
For self wake up from STOP mode, since steps which MCU enters STOP mode differs on different MCUs, take flexcan_interrupt_transfer of twrke18f for example, user should do like this:
##include "fsl_smc.h"
...
...
flexcanConfig.enableSelfWakeup = true;
FLEXCAN_Init();
...
...
SMC_SetPowerModeStop(SMC, kSMC_PartialStop1);
if (wakenUp)
{
PRINTF("B has been waken up!\r\n\r\n");
}
...
...
Supported Boards#
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
Connect J23-1 (CAN_H) of the two boards
Connect J23-3 (CAN_L) of the two boards
Connect J23-2 (GND) of the two boards
Short J18 1-2, 3-4 for each board
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
After connecting the two boards, these instructions display on each terminal window. One board must be chosen as node A and the other board as node B. (Note: Node B should start first) Data is sent continuously between the node A and the node B.
This message displays on the node A terminal:
********* FLEXCAN Interrupt EXAMPLE *********
Message format: Standard (11 bit id)
Message buffer 1 used for Rx.
Message buffer 0 used for Tx.
Interrupt Mode: Enabled
Operation Mode: TX and RX --> Normal
*********************************************
Please select local node as A or B:
Note: Node B should start first.
Node:a
Press any key to trigger one-shot transmission
Rx MB ID: 0x123, Rx MB data: 0x0, Time stamp: 8877
Press any key to trigger the next transmission!
Rx MB ID: 0x123, Rx MB data: 0x1, Time stamp: 32459
Press any key to trigger the next transmission!
~~~~~~~~~~~~~~~~~~~~~
This message displays on the node B terminal:
********* FLEXCAN Interrupt EXAMPLE *********
Message format: Standard (11 bit id)
Message buffer 1 used for Rx.
Message buffer 0 used for Tx.
Interrupt Mode: Enabled
Operation Mode: TX and RX --> Normal
*********************************************
Please select local node as A or B:
Note: Node B should start first.
Node:b
Start to Wait data from Node A
Rx MB ID: 0x321, Rx MB data: 0x0, Time stamp: 5759
Wait Node A to trigger the next transmission!
Rx MB ID: 0x321, Rx MB data: 0x1, Time stamp: 57276
Wait Node A to trigger the next transmission!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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
Connect J13-4 (CAN_H) of the two boards
Connect J13-3 (CAN_L) of the two boards
Connect J13-5 (GND) of the two boards
Short J16 1-2, 3-4 and J15 1-2 for each board
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
After connecting the two boards, these instructions display on each terminal window. One board must be chosen as node A and the other board as node B. (Note: Node B should start first) Data is sent continuously between the node A and the node B.
This message displays on the node A terminal:
********* FLEXCAN Interrupt EXAMPLE *********
Message format: Standard (11 bit id)
Message buffer 1 used for Rx.
Message buffer 0 used for Tx.
Interrupt Mode: Enabled
Operation Mode: TX and RX --> Normal
*********************************************
Please select local node as A or B:
Note: Node B should start first.
Node:a
Press any key to trigger one-shot transmission
Rx MB ID: 0x123, Rx MB data: 0x0, Time stamp: 8877
Press any key to trigger the next transmission!
Rx MB ID: 0x123, Rx MB data: 0x1, Time stamp: 32459
Press any key to trigger the next transmission!
~~~~~~~~~~~~~~~~~~~~~
This message displays on the node B terminal:
********* FLEXCAN Interrupt EXAMPLE *********
Message format: Standard (11 bit id)
Message buffer 1 used for Rx.
Message buffer 0 used for Tx.
Interrupt Mode: Enabled
Operation Mode: TX and RX --> Normal
*********************************************
Please select local node as A or B:
Note: Node B should start first.
Node:b
Start to Wait data from Node A
Rx MB ID: 0x321, Rx MB data: 0x0, Time stamp: 5759
Wait Node A to trigger the next transmission!
Rx MB ID: 0x321, Rx MB data: 0x1, Time stamp: 57276
Wait Node A to trigger the next transmission!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~