Blinkenschild: Unterschied zwischen den Versionen
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** 15 pcs RGB-123 | ** 15 pcs RGB-123 | ||
** counts a total of 960 pixels (40x24) | ** counts a total of 960 pixels (40x24) | ||
** a teensy 3. | ** a teensy 3.1 for control | ||
** a microsdcard reader interface | ** a microsdcard reader interface | ||
** a bluetooth module | ** a bluetooth module | ||
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This is still too fast so i had to add 30 ms delay between the frames or we would not perceive it as a fluid animation but rather just blinking bright light. | This is still too fast so i had to add 30 ms delay between the frames or we would not perceive it as a fluid animation but rather just blinking bright light. | ||
Teensy 3. | Teensy 3.1 is a GREAT MCU, OctoWS2811 is incredible fast. | ||
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As VCC is between 3.7 and 4.2V the 3.3V signal levels are well within that range. | As VCC is between 3.7 and 4.2V the 3.3V signal levels are well within that range. | ||
When changing from teensy 3.0 to teensy 3.1 i experienced some weird flickering. | |||
After hours of debugging i found out that it is a software issue with teensy 3.1 and the OctoWS2811 libraries. | |||
Upgrading to the latest -rc1 teensyduino environment worked fine. | |||
Also there is a [http://forum.pjrc.com/threads/23877-WS2812B-compatible-with-OctoWS2811-library?p=38190&viewfull=1#post38190 thread on the internet] about this erratic behaviour: | |||
And this is the difference int he OctoWS2811 lib that does the trick. | |||
> #ifdef __MK20DX256__ | |||
> MCM_CR = MCM_CR_SRAMLAP(1) | MCM_CR_SRAMUAP(0); | |||
> AXBS_PRS0 = 0x1032; | |||
> #endif | |||
===Software=== | ===Software=== | ||