MF PROJECTS HOME TECHNICAL TIPS MOBILE SITE
PIC Projects
WiFi - ESP8266
Doorbell with SD / EEPROM
SD FAT16/32 for .bmp
TFT Egg Timer
LCD TFT Oscilloscope
SD Talking Clock
SD Sound Recorder,
    FAT32 wav Player
LED Thermometer
LED Egg Timer
LCD Egg Timer

Frequency Counters
TFT 10MHz
100KHz For PC
1MHz For PC
8 Digits LED 50 MHz
Scope Screen Display
LCD Module 10MHz
6MHz for Android
USB PIC18F2550
USB TFT display BMP
USB DS18B20 Sensor
USB Thermometer
USB Counter
USB Meter
USB Oscilloscope
USB Input-Output
USB 16x2 LCD

COM & LPT Ports
MCP3201 on LPT
Serial TFT Text
Serial Inputs Outputs
Serial Port LCD
Analogue Signal to LPT
MCP3201 on Serial Port
Serial Thermometer
Analogue Signal to Serial
LCD Display on LPT
Serial Thermostat

Others
Water Softener
HP Stream 7 docking
3.7V to 5V
Solar Charger

Infrared Decoder
PIC Music

Code Lock
Code Lock with LCD

SD CARD + PETIT FAT BMP DISPLAY

Updated on 6/2/2015
The PIC16F876A
programmed with PETIT FAT reads bitmap file on the SD card and displays it on the TFT module. The firmware works for SD cards only because you can format FAT16 on max 2GB card. SD card interface the PIC in SPI mode.
Petit FAT file system reads one file only. It is configured to FAT16, FAT32 can be added. This pic doesn't have enough RAM for Write File option. Read more at http://elm-chan.org/fsw/ff/00index_p.html
LCD TFT Module used is 8 bits drive. It includes SD card socket and 3.3V regulator. Inputs to the TFT driver are level shifted from 5V to 3.3V by buffers, inputs to the SD card are driven by resistors to reduce the drive to 3.3V .
The pic firmware can read only bitmap file of 24 bits bmp type. The file has to be size of 240 pixels width and 320 pixels high. The firmware removes the bitmap header (54 bytes) and then streams the rest of the file to the TFT. Every 3 bytes are the 24 bits color for one pixel. The bitmap format reads and displays the pixels of the image starting from bottom left.
Small color coded squares on the screen indicate errors: yellow for SD error, blue for file system error and green for file errors.
TO SET UP THE SD CARD:
Format the card with FAT16.
Create image file using MS Paint or another program, file size is 226KB, image size 320 pixels high by 240 pixels wide.
Name the file "pic.bmp".
Save the file as 24 bits bmp.
Add the file to the root folder of the card (don't use a directory).

FAT 32 PICTURE FRAME

This project uses the same circuit with different firmware. It doesn't include Petit FAT. The program displays BMP pictures from the SD/SDHC card formatted FAT32. The code has functions that find the root directory, read the files location from the Root Directory and streams the data to the TFT. The code displays the files in rotation. The software can read only FAT32 and only from the root directory. The file name and size isn't read.
To setup the SD/SDHC card: format the card with FAT32, add files to root folder without directories. Each picture file size is 226KB, image size 320 pixels high by 240 pixels wide, saved as 24 bits bitmap. Files names have to be 8.3 type, 8 characters max. File can be created using MS Paint.

More about FAT32 in this document: https://staff.washington.edu/dittrich/misc/fatgen103.pdf
Good free specifications for SD can be found in SanDisk PDF: http://alumni.cs.ucr.edu/~amitra/sdcard/ProdManualSDCardv1.9.pdf
You are free to use the circuit diagram and software with no limitations.

 

Circuit Description
See also Technical Tips

RD input of 3.3V is taken from the TFT module.
The module supply is 5V. The LCD driver I have is ILI9341.
I bought this module directly from China because the price was more sensible. It is important to note that most products sold on the net by Chinese are defective, you only have to hope that the one you receive after 4 weeks is only the second hand one and not the one that partly defective or doesn't work at all. Whichever way it is, forget about refund. Don't buy from http://www.banggood.com when you order small quantity they label you as not valuable customer and send you rubbish out of their bin.





Name:

Comments and questions

Copy the number from the picture It stops net-robots from adding comments.


Be the first to add a comment.