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SobelFilter

UART-streamed Sobel edge detection pipeline for iCE40 UP5K FPGA. Image data is transmitted over serial, processed on the FPGA, and streamed back as edge-detected output.

Processing Pipeline

Project Specifications

Target Device: Lattice iCE40 UP5K

Logic Cells: 1912 out of 5280 used (36%)

Block RAM: 25 out of 30 blocks used (83%)

Maximum Frequency: 35.29 MHz (30 MHz core clock)

Clock Source: 12 MHz external oscillator via PLL

Design Features

Elastic pipelining in convolution and magnitude stages for timing optimization Synchronous FIFO for input/output buffering Circular line buffer for efficient 3x3 window management Gaussian matrix blur for noise reduction Handshake protocol for rate-decoupled data flow

Critical Path Analysis

The synthesis report identifies a single critical path in the UART TX prescaler divider logic.

Example Outputs

About

Image filter accelerator on ice breaker FPGA

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