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8 Demonstration

1. Build and compile the project.
2. Plug one side of USB cable in PC USB port and another side in the debug link port in the EVK board, and then

download the image in the MCU.

3. Connect camera to MCU by referring to connection of interface in Chapter 4.
4. Connect the LCD panel with Arduino port on the LPCXpresso55s69 EVK board.
5. Connect one side of USB cable to USB power socket and the other to 5 V Power only USB port P5.
6. The LCD displays the video frame from camera as shown in 

Figure 4

.

 

If the code cannot execute after downloaded, one of the reasons is that the MCU goes to ISP mode. The root cause
is that camera module generates logic level signal on P0.5 pin during MCU is under reset state. The solutions can
be as below:

1. Disconnect the pin before reset and connect it after reset.

2. Power down the camera module before reset and power up after reset.

  WARNING  

Figure 4. Video frame

NXP Semiconductors

Demonstration

Camera Interface in LPC55(S)xx, Rev. 3, 07 September 2021

Application Note

7 / 9

Summary of Contents for AN12868

Page 1: ...sferred This signal is often a way to indicate that one entire frame is transmitted Pixel Clock PCLK This pixel clock changes on every pixel The application note only focuses on Digital Video Port DVP...

Page 2: ...lay the 320 240 resolution LCD up to 30 fps 5 4 System clock The camera engine shares the system clock with Arm core To speed up the processing time the system clock must be configured to 150 MHz For...

Page 3: ...ution should be configured as QVGA 320 240 6 Pin description 6 1 Connection of interface Camera D0 D1 D2 D3 D4 D5 D6 D7 SIOC SIOD VSYNC HREF PCLK XCLK VCC GND P0 0 P0 1 P0 2 P0 3 P0 4 P0 5 P0 6 P0 7 P...

Page 4: ...presso IDE but not IAR 7 2 API routine The main purposes of the API routines include Enable the clock of engine Configure the IO as camera interface function Initial the I2C interface Enable the inter...

Page 5: ...put Camera engine function P0_6 15 Input Camera engine function P0_7 15 Input Camera engine function P0_18 15 Output Camera engine function p0_13 0 Input GPIO as VSYNC input P0_15 0 Input GPIO as Pixe...

Page 6: ...ed in the RAM by camera engine 7 4 6 Reserved 46_IRQHandler Same with other peripheral handler camera engine handler is implemented by Arm core once engine finishes the storage operation In the handle...

Page 7: ...r to 5 V Power only USB port P5 6 The LCD displays the video frame from camera as shown in Figure 4 If the code cannot execute after downloaded one of the reasons is that the MCU goes to ISP mode The...

Page 8: ...lease A Purchasing LCD module and camera module used in this demo You can purchase the LCD board and camera module from the below links 1 https www waveshare com 2 8inch tft touch shield htm 2 http ww...

Page 9: ...cts with security features that best meet rules regulations and standards of the intended application and make the ultimate design decisions regarding its products and is solely responsible for compli...

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