Timing Analysis

Analyze timing-critical code paths for real-time constraint violations and optimization opportunities.

$ARGUMENTS

What This Skill Analyzes

LED Protocol Timing

• WS2812/SK6812/APA106 bit timing compliance (T0H, T0L, T1H, T1L, reset)
• SPI clock rate calculations for wave8 encoding
• RMT resolution and duration encoding accuracy
• Reset pulse duration adequacy across chipsets

Frame Rate Analysis

• Total frame time budget (show() to DMA complete to reset delay)
• Per-LED encoding time multiplied by LED count = encoding phase duration
• DMA transfer time at configured clock rate
• Inter-frame gap and CPU availability

ISR Latency

• Interrupt response time constraints
• ISR execution time (must be <10us for most applications)
• Priority inversion risks from ISR-held resources
• Nested interrupt handling

DMA Transfer Timing

• Transfer size multiplied by clock period = transfer duration
• Double-buffer swap timing and pipeline stalls
• Chunk encoding overlap with DMA transmission
• SPI/I2S/RMT peripheral clock configuration

How To Use

/timing-analysis src/platforms/esp/32/drivers/spi/
/timing-analysis What is the maximum frame rate for 300 WS2812 LEDs on ESP32-S3 using SPI?
/timing-analysis Check if the RMT timing meets WS2812 spec

What You'll Get

• Timing breakdown with calculated durations (ns/us/ms precision)
• Protocol compliance verification against LED chipset datasheets
• Frame rate estimates for given LED counts
• Bottleneck identification and optimization suggestions
• Clock configuration recommendations