CameraLink Signal Capture Demo with Altera Cyclone IV (ACM-024) LVDS I/F
This is simple CameraLink LVDS signal capture demonstration. CameraLink LVDS signals are directly captured by Altera Cyclone IV FPGA board ACM-024, and displayed in TFT LCD. CameraLink signals are generated by an analog CameraLink driver. A cheap CCD camera module is connected to the driver's input.
Components
| Components | ||
|---|---|---|
| Altera Cyclone IV GX FPGA Board | ACM-024 | HuMANDATA |
| Universal board | ZKB-105 | HuMANDATA |
| CameraLink | ACLD-400 (Japanese) | STAC |
| 4.3" LCD Touch Panel Package | TRDB-LTM (Discontinued) |
Terasic UTL-021 is alternative product  5″ Color LCD Display Module with Touch Panel |
| Color CCD Camera | TR-1300C (Japanese） | corona-dengyo |
| Download cable | Terasic Blaster | Terasic |
Connector
CameraLink frame grabber connector is "10226-2210PE (3M)". Pins are converted into DIP scale with a conversion board "SOP28-1P27(Aitem-Lab, japanese)".
System Architecture
The FPGA receives LVDS signals (data x4, clock x1) from ACLD-400 and transfers RGB data to the LCD.
FPGA Configuration
LVDS signals are captured by FPGA internal components generated by MegaWizard "ALTLVDS_RX".
Number of LVDS data signals is 4, so set "Number of Channels" to "4".
CameraLink transfer data in 7bits per one clock in one data-lane. Set "Deserialization Factor" to "7".
ACLD-400 output clock at 24.5454MHz in NTSC mode, so set "Clock Frequency" to 24.55MHz.
Set "Input Dat Rate" to 171.8178 which multiply "Clock Frequency" by "Deserialization Factor".
Waveform
| Net Name | Signal | Explanation |
|---|---|---|
| rx_out[27] | Spare | Reserved bit |
| rx_out[20] | DVAL | Frame and Line data is valid |
| rx_out[19] | FVAL | Frame data is valid (Vertical synchronization signal) |
| rx_out[18] | LVAL | Line data is valid (Horizonal synchronization signal) |
| rx_out[22:21],[5:0] | R[7:0] | Red color data |
| rx_out[24:23],[11:6] | G[7:0] | Green color data |
| rx_out[26:25],[17:12] | B[7:0] | Blue color data |
Design Files
We hope you find this demonstration informative.
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