Playing video on nokia color LCD using an ATmega32 • Tech Projects

video Playing video on nokia color LCD using an ATmega32
Hi,

I am introducing my new video player made using an atmega32 microcontroller and nokia color LCD. I got a 65K color LCD from an old nokia 6030 mobile phone. I directly soldered 10 thin enamelled coper wire from the 0.5 cm square area of the thin flexible pcb of the LCD to a berg strip fixed on another board. For me it was the most difficult part of this project because I don’t have any tiny tip soldering iron and an lcd connector (5×2) socket with me.

After that I interfaced the lcd with atmega32 via SPI. Then initialized the lcd and displayed some color patterns and confirmed the LCD is working.
Now my next step is to display a still image on the LCD. I used python image library to extract pixel information from any image file (jpeg, png etc) and I streamed it to avr via uart using pyserial and displayed the image successfully on the LCD with 16bit color depth.
After that I used an SD card to store the converted pixel information (132×132*2) bytes/picture. Then I interfaced the SD card with same SPI of atmega32 and displayed the image stored on it. I used FAT16 filesystem. The sd card part is not a problem for me because I have already done more projects on SD/MMC cards and I copied my previous code for that.
So after displaying the still image, I thought of making a slide show on the lcd. For that I wrote a python script to convert all images in a folder (on my pc) to a 132x132x2 byte files which is nothing but the uncompressed pixel information stored as new files. Then I copied all these converted files to SD card (file.lcd) and displayed them as an image slide show with 1 second time gap between each image.
Since I successfully did the image slide show, then suddenly the idea of making a video player came to my mind. Because video is nothing but a slide show at high frame rate.
From here this project begins.
Then I started to search in google, how to convert a video to still frames. I came to know about ffmpeg program. I am using linux always. I have downloaded ffmpeg and converted a sample video to frames at 15 frames/second & 132×65 resolution. Then I used my python script to convert each still images to pixel information at 16 bit/pixel. Here instead of making small small files, I just collected all the picture information of adjacent frames into a single file and named as my_video.lcd. Then I copied that file to memory card and modified the avr program to display it on the LCD. It access the FAT16 file system, then search for *.lcd files and if found, it returns the starting cluster address of that file and then stream that cluster to the LCD very fast. NOW VIDEO IS PLAYED (without audio)!!!!! ….Almost half of the project is finished….
Next half: (audio mixing)

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