NXP Application Code Hub

AN12686: Using FlexIO to emulate Parallel Camera Interface on i.MX RT

This application note describes how to use the FlexIO to emulate the parallel camera interface to receive real-time image data from a camera device based on i.MX RT1010.

Due to the limited RAM buffer size, the frame size is configured to QQVGA (160*120).

Please refer to AN12686 for complete instructions on how to use this software.

FlexIO is highly configurable. It allows you to implement a variety of functions, including:

Emulation of serial communication interfaces, such as UART, SPI, I2C, I2S, and so on.
Emulation of parallel communication interfaces, such as the camera interface, Motorola 68K bus, Intel 8080 bus, and so on.
Generation of PWM waveforms.
Implementation of logic functions.
Implementation of state-machine functions.

Boards: EVBMIMXRT1010

Categories: Graphics, Vision

Peripherals: I2C, SPI, VIDEO

1. Software

This demo is built based on NXP MCUXpresso SDK. And this repository contains all required source files.

MCUXpresso SDK: 2.5.0
IAR Embedded Workbench for ARM: 9.30.1

2. Hardware

EVBMIMXRT1010 Rev A board
OV7670 camera module
ILI9341 LCD module
Personal Computer
J-Link Debugger
Micro USB cable

3. Setup

Prepare the EVBMIMXRT1010 board:
- short R45 pin2 & pin3;
- short R46 pin2 & pin3;
- short R47 pin2 & pin3;
- short R51 pin2 & pin3;
- short R52 pin2 & pin3;
- short R56 pin2 & pin3;
- short R70 pin2 & pin3;
- short J33 pin3 & pin4, pin5 & pin6, pin7 & pin8 with jumpers;
- short J34 pin4 & pin5, pin7 & pin8, pin10 & pin11, pin13 & pin14, pin16 & pin17 with jumpers;
- short J35 pin1 & pin2, pin4 & pin5, pin7 & pin8, pin10 & pin11, pin13 & pin14, pin16 & pin17 with jumpers;
Connect the OV7670 camera module with J45 of EVBMIMXRT1010.

Connect the ILI9341 LCD module with J46 pins of EVBMIMXRT1010 by using wires.

EVBMIMXRT1010	ILI9341 LCD module
BOOT_3V3 - J46-30	VCC - PIN1
GND - J46-29	GND - PIN2
SPI_CS_Touch - J46-23	CS - PIN3
GPIOMUX_IO7 - J46-1	RESET - PIN4
GPIOMUX_IO8 - J46-2	DC/RS - PIN5
SPI_SDO - J46-26	SDI/MOSI - PIN6
SPI_SCK - J46-24	SCK - PIN7
GPIO2_IO13 - J46-28	LED - PIN8
SPI_SDI - J46-25	SDO/MISO - PIN9

Connect J-Link debugger with J36 or J37 of EVBMIMXRT1010.
Build a configuration and download the program to the target board.

4. Results

When the demo runs successfully, the camera frames are shown in the LCD panel.

5. FAQs

6. Support

If you have questions, please create a ticket in NXP Community.

Project Metadata

Questions regarding the content/correctness of this example can be entered as Issues within this GitHub repository.

Warning: For more general technical questions regarding NXP Microcontrollers and the difference in expected funcionality, enter your questions on the NXP Community Forum