Difference between revisions of "Led Matrix 32x64"

From Fixme.ch
Jump to: navigation, search
 
(13 intermediate revisions by 2 users not shown)
Line 1: Line 1:
−
[[Category:Ongoing_Projects]]
 
−
 
−
A FPGA-based interface controller for
 
−
[http://www.limpkin.fr/index.php?post/2011/05/12/Oops...-I-dit-it-again%21 Limpkin's RGB LED matrices].
 
−
 
−
 
 
=== Matrix reference ===
 
=== Matrix reference ===
  
−
* size: 64x32 RGB LEDs
+
* Size: 32x64 RGB LEDs (127x256mm)
−
* organization: 2 blocks (upper and lower) with each 16 lines à 64 LEDs
+
* Organization: 2 blocks (upper and lower) with each 16 lines of 64 LEDs
 
* (6) 64 bit shift registers
 
* (6) 64 bit shift registers
−
* input pins:
+
* 40ns period = 25MHz max.
−
** R, G, B for each upper and lower: R1, G1, B1, R2, G2, B2; 1 = LED on
+
* ~4A with full matrix in white color
−
** clock (next bit, rising edge)
+
* 5V signals
−
** latch (latch shifted data to output, rising edge)
+
* Serial MCU Interface
−
** enable (drives LEDs from latched data?, 0 = enable)
+
* Price: ~ 150.- USD
−
** 5V signals
+
 
−
** 40ns period = 25MHz max.
+
  
  
−
== Overview ==
 
  
−
* FPGA drives 1 or more (up to 4?) matrices
+
=== Input pins ===
−
* use block ram or external SRAM for frame buffer storage
+
# '''DR1''' - RED for lines 1-16 (1 = LED on)
−
* interface with PC
+
# '''DG1''' - GREEN for lines 1-16 (1 = LED on)
 +
# '''DB1''' - BLUE for lines 1-16 (1 = LED on)
 +
# '''GND''' - Ground Reference
 +
# '''DR2''' - RED for lines 17-32 (1 = LED on)
 +
# '''DG2''' - GREEN for lines 17-32 (1 = LED on)
 +
# '''DB2''' - BLUE for lines 17-32 (1 = LED on)
 +
# '''GND''' - Ground Reference
 +
# '''A''' - Used for the bit selection of one of 16 rows
 +
# '''B''' - Used for the bit selection of one of 16 rows
 +
# '''C''' - Used for the bit selection of one of 16 rows
 +
# '''D''' - Used for the bit selection of one of 16 rows
 +
# '''CLK''' - Clock imput for 74HC595 shift register
 +
# '''LAT''' - Content of 74HC595 Shift Register transferred to output latches
 +
# '''EN''' - Enable 74HC138 encoder to set one of 16 rows (0 = enable)
 +
# '''GND''' Ground Reference
  
  
−
=== Feature ideas ===
 
  
−
* double buffering
+
=== Pictures ===
−
* larger off-screen buffer + compositing ops?
+
[[File:Ledmatrix_1.JPG||500px]]
−
* character generation
+
[[File:Ledmatrix_2.JPG||500px]]
−
* update only sections
+
−
* small CPU core to execute short programs?
+

Latest revision as of 00:13, 5 September 2011

Matrix reference

  • Size: 32x64 RGB LEDs (127x256mm)
  • Organization: 2 blocks (upper and lower) with each 16 lines of 64 LEDs
  • (6) 64 bit shift registers
  • 40ns period = 25MHz max.
  • ~4A with full matrix in white color
  • 5V signals
  • Serial MCU Interface
  • Price: ~ 150.- USD



Input pins

  1. DR1 - RED for lines 1-16 (1 = LED on)
  2. DG1 - GREEN for lines 1-16 (1 = LED on)
  3. DB1 - BLUE for lines 1-16 (1 = LED on)
  4. GND - Ground Reference
  5. DR2 - RED for lines 17-32 (1 = LED on)
  6. DG2 - GREEN for lines 17-32 (1 = LED on)
  7. DB2 - BLUE for lines 17-32 (1 = LED on)
  8. GND - Ground Reference
  9. A - Used for the bit selection of one of 16 rows
  10. B - Used for the bit selection of one of 16 rows
  11. C - Used for the bit selection of one of 16 rows
  12. D - Used for the bit selection of one of 16 rows
  13. CLK - Clock imput for 74HC595 shift register
  14. LAT - Content of 74HC595 Shift Register transferred to output latches
  15. EN - Enable 74HC138 encoder to set one of 16 rows (0 = enable)
  16. GND Ground Reference


Pictures

Ledmatrix 1.JPG Ledmatrix 2.JPG

Retrieved from "http://fixme.ch/w/index.php?title=Led_Matrix_32x64&oldid=814"