t-format_PWM_trigger#

Overview#

The t-format_PWM_trigger example shows how to use flexio T-format driver in sync way:

In this example, a flexio simulated T-format connect to the encoder through RS-485, the board will send requests triggered the FlexPWM to and receive responses from the board.

Supported Boards#

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 T-format example (PWM trigger)
FlexIO Root Clock is 80 MHz

******************** Running the loop test ********************
Multi-turn data: 1, single-turn data: 11925
Multi-turn data: 1, single-turn data: 10376
Multi-turn data: 1, single-turn data: 2719

t-format_PWM_trigger

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