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fix Teensy4 timing for 400kHz strings #38

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fix Teensy4 timing for 400kHz strings #38

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6 changes: 4 additions & 2 deletions OctoWS2811_imxrt.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -314,7 +314,8 @@ void OctoWS2811::show(void)
TMR4_CNTR2 = comp1load[0] + 1;

// wait for WS2812 reset
while (micros() - update_begin_micros < numbytes * 10 + 300) ;
uint32_t us_per_byte = (params & 0xC0) == WS2811_400kHz ? 20 : 10;
while (micros() - update_begin_micros < numbytes * us_per_bytes + 300) ;

// start everything running!
TMR4_ENBL = enable | 7;
Expand Down Expand Up @@ -364,7 +365,8 @@ void OctoWS2811::isr(void)
int OctoWS2811::busy(void)
{
if (!dma3.complete()) ; // DMA still running
if (micros() - update_begin_micros < numbytes * 10 + 300) return 1; // WS2812 reset
uint32_t us_per_byte = (params & 0xC0) == WS2811_400kHz ? 20 : 10;
if (micros() - update_begin_micros < numbytes * us_per_byte + 300) return 1; // WS2812 reset
return 0;
}

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