a-format_polling_transfer#
Overview#
The a-format_polling example shows how to use flexio A-format driver in polling way:
In this example, a flexio simulated A-format connect to the encoder through RS-485, the board will send requests to and receive responses from the board.
Supported Boards#
i.MXRT1180-EVK
Hardware requirements
Micro USB cable
MIMXRT1180-EVK board
J-Link Debug Probe
5V power supply
Personal Computer
RS-485 adapter board
Board settings
This example requires connecting between FlexIO2 pins and RS-485 adapter board which is connected to the encoder.
FLEXIO_A_FORMAT_TX_PIN(J41-2) -> RX pin of RS-485
FLEXIO_A_FORMAT_RX_PIN(J41-4) -> TX pin of RS-485
FLEXIO_A_FORMAT_DR_PIN(J41-6) -> D/R pin of RS-485
3.3V pin(J45-8) -> 3.3V pin of RS-485
GND pin(J45-12) -> GND pin of RS-485
5.0V pin(J45-16) -> 5.0V pin of encoder
GND pin(J45-14) -> GND pin of encoder
A pin of RS-485 -> SD+ pin of encoder
B pin of RS-485 -> SD- pin of encoder
Prepare the Demo
Connect 5V power supply and J-Link Debug Probe to the board, switch SW1 to power on the board.
Connect a micro USB cable between the host PC and the J53 USB port 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 re-power up your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the similar information from the terminal as below.
Encoder A-format example
Encoder ID: 5946590
Multi-turn data: 64474, single-turn data: 147617
[0.10s] Encoder ID: 0x5ABCDE
Multi-turn data: 64474, single-turn data: 147617
Temperature: 45.000000
[0.20s] Encoder ID: 0x5ABCDE
Multi-turn data: 64474, single-turn data: 147617
Temperature: 44.000000
FRDM-MIMXRT1186
Hardware requirements
USB Type-C cable
FRDM-IMXRT1186 board
5V power supply
Personal Computer
FRDM-LVPMSM-FA board
4-pin Mini DIN power supply
Board settings
This example requires connecting between FRDM-IMXRT1186 board and FRDM-LVPMSM-FA board.
Short J4-1 and J4-2 on the FRDM-IMXRT1186 board
Short J300-1 and J300-2 on the FRDM-LVPMSM-FA board
J72 and J73 jumpers are left unconnected on the FRDM-LVPMSM-FA board
FRDM-LVPMSM-FA SW90[1-4] = 0111
FRDM-LVPMSM-FA SW30[1-4] = 0100
FRDM-LVPMSM-FA J70-1 -> 5.0V pin of encoder
FRDM-LVPMSM-FA J70-6 -> GND pin of encoder
FRDM-LVPMSM-FA J70-4 -> SD+ pin of encoder
FRDM-LVPMSM-FA J70-9 -> SD- pin of encoder
Prepare the Demo
Connect a USB Type-C cable between the PC host and the OpenSDA USB port on the FRDM-IMXRT1186 board.
Connect 5V power supply, then switch SW5 to power on the FRDM-IMXRT1186 board.
Connect 4-pin Mini DIN power supply to J10 on the FRDM-LVPMSM-FA 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 re-power up your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the similar information from the terminal as below.
Encoder A-format example
FlexIO Root Clock is 80 MHz
******************** 1 to 1 mode (Only one encoder connects to the board) ********************
****************
* Test case 1 *
****************
> Set the encoder address to 3 ==> successful
****************
* Test case 2 *
****************
> Set the encoder ID to 0x030201 ==> successful
****************
* Test case 3 *
****************
> Get the encoder ID ==> 0x030201 (successful)
......
******************** Running the loop test ********************
[0.10s] Multi-turn data: 64478, single-turn data: 715574
Temperature: 43.000000
[0.20s] Multi-turn data: 64478, single-turn data: 726567
Temperature: 43.000000
IMX943-EVK
Hardware requirements
Micro USB cable
IMX943-EVK board
J-Link Debug Probe
12V~20V power supply
Personal Computer
RS-485 adapter board
Board settings
This example requires connecting between FlexIO1 pins and RS-485 adapter board which is connected to the encoder.
FLEXIO_A_FORMAT_DR_PIN(J48-10) -> D/R pin of RS-485
FLEXIO_A_FORMAT_TX_PIN(J48-9) -> RX pin of RS-485
FLEXIO_A_FORMAT_RX_PIN(J48-11) -> TX pin of RS-485
3.3V pin(J49-8) -> 3.3V pin of RS-485
GND pin(J49-12) -> GND pin of RS-485
5.0V pin(J49-10) -> 5.0V pin of encoder
GND pin(J49-14) -> GND pin of encoder
A pin of RS-485 -> SD+ pin of encoder
B pin of RS-485 -> SD- pin of encoder
Please note this application can’t support running with Linux BSP!
Note
Please run the application in Low Power boot mode (without Linux BSP). The IP module resource of the application is also used by Linux BSP. Or, run with Single Boot mode by changing Linux BSP to avoid resource conflict. Tips: After you insert the USB2COM, a new USBCOM will be found. The function output in new USBCOM.
Prepare the Demo
Connect 12V~20V power supply and J-Link Debug Probe to the board, switch SW301 to power on the board.
Connect a micro USB cable between the host PC and the J1401 USB port 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 re-power up your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the similar information from the terminal as below.
Encoder A-format example
Encoder ID: 5946590
Multi-turn data: 64474, single-turn data: 147617
[0.10s] Encoder ID: 0x5ABCDE
Multi-turn data: 64474, single-turn data: 147617
Temperature: 45.000000
[0.20s] Encoder ID: 0x5ABCDE
Multi-turn data: 64474, single-turn data: 147617
Temperature: 44.000000
FRDM-MCXA266
Hardware requirements
Type-C USB cable
FRDM-MCXA266 board
Personal Computer
A-format encoder
RS-485 transceiver
Board settings
This example uses FlexIO0 to simulate the A-format master and communicates with the encoder through an RS-485 transceiver. Connect the encoder to the FRDM-MCXA366 board as below:
The A-format signals are routed to the following FlexIO0 pins (MUX ALT6):
FLEXIO0_D16 (P2_8, pin 41) -> DR (direction / driver-enable)
FLEXIO0_D17 (P2_9, pin 42) -> TX (transmit data to the RS-485 transceiver)
FLEXIO0_D18 (P2_10, pin 43) -> RX (receive data from the RS-485 transceiver)
Wire the RS-485 transceiver to the encoder:
5.0V -> 5.0V pin of encoder
GND -> GND pin of encoder
SD+ -> SD+ pin of encoder
SD- -> SD- pin of encoder
Prepare the Demo
Connect a USB Type-C cable between the PC host and the MCU-Link USB port on the 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 example.
Running the demo
When the example runs successfully, you can see the similar information from the terminal as below.
Encoder A-format example
FlexIO Root Clock is 90 MHz
******************** 1 to 1 mode (Only one encoder connects to the board) ********************
****************
* Test case 1 *
****************
> Set the encoder address to 3 ==> successful
****************
* Test case 2 *
****************
> Set the encoder ID to 0x030201 ==> successful
****************
* Test case 3 *
****************
> Get the encoder ID ==> 0x030201 (successful)
......
******************** Running the loop test ********************
[0.10s] Multi-turn data: 64478, single-turn data: 715574
Temperature: 43.000000
[0.20s] Multi-turn data: 64478, single-turn data: 726567
Temperature: 43.000000
FRDM-MCXA366
Hardware requirements
Type-C USB cable
FRDM-MCXA366 board
Personal Computer
A-format encoder
RS-485 transceiver
Board settings
This example uses FlexIO0 to simulate the A-format master and communicates with the encoder through an RS-485 transceiver. Connect the encoder to the FRDM-MCXA366 board as below:
The A-format signals are routed to the following FlexIO0 pins (MUX ALT6):
FLEXIO0_D16 (P2_8, pin 41) -> DR (direction / driver-enable)
FLEXIO0_D17 (P2_9, pin 42) -> TX (transmit data to the RS-485 transceiver)
FLEXIO0_D18 (P2_10, pin 43) -> RX (receive data from the RS-485 transceiver)
Wire the RS-485 transceiver to the encoder:
5.0V -> 5.0V pin of encoder
GND -> GND pin of encoder
SD+ -> SD+ pin of encoder
SD- -> SD- pin of encoder
Prepare the Demo
Connect a USB Type-C cable between the PC host and the MCU-Link USB port on the 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 example.
Running the demo
When the example runs successfully, you can see the similar information from the terminal as below.
Encoder A-format example
FlexIO Root Clock is 90 MHz
******************** 1 to 1 mode (Only one encoder connects to the board) ********************
****************
* Test case 1 *
****************
> Set the encoder address to 3 ==> successful
****************
* Test case 2 *
****************
> Set the encoder ID to 0x030201 ==> successful
****************
* Test case 3 *
****************
> Get the encoder ID ==> 0x030201 (successful)
......
******************** Running the loop test ********************
[0.10s] Multi-turn data: 64478, single-turn data: 715574
Temperature: 43.000000
[0.20s] Multi-turn data: 64478, single-turn data: 726567
Temperature: 43.000000