Trying to run the "Fun with FFT" code on Teensy 3.1 works fine with 3.0. I get lots of errors related to the NeoPixel library.
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Arduino: 1.0.5 (Windows 7), Board: "Teensy 3.1"
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp: In member function 'void Adafruit_NeoPixel::show()':
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:764:3: error: 'Pio' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:764:19: error: 'port' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:765:12: error: 'WoReg' does not name a type
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:768:29: error: 'pmc_set_writeprotect' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:769:35: error: 'TC3_IRQn' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:769:43: error: 'pmc_enable_periph_clk' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:770:16: error: 'TC1' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:5: error: 'TC_CMR_WAVE' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:19: error: 'TC_CMR_WAVSEL_UP' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:38: error: 'TC_CMR_TCCLKS_TIMER_CLOCK1' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:64: error: 'TC_Configure' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:772:18: error: 'TC_Start' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:774:15: error: 'g_APinDescription' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:776:3: error: 'portSet' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:777:3: error: 'portClear' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:778:3: error: 'timeValue' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:779:3: error: 'timeReset' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:786:14: error: 'VARIANT_MCK' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:790:14: error: 'VARIANT_MCK' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:799:18: error: 'TC_CCR_CLKEN' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:799:33: error: 'TC_CCR_SWTRG' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:809:17: error: 'TC_Stop' was not declared in this scope
This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
Arduino: 1.0.5 (Windows 7), Board: "Teensy 3.1"
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp: In member function 'void Adafruit_NeoPixel::show()':
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:764:3: error: 'Pio' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:764:19: error: 'port' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:765:12: error: 'WoReg' does not name a type
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:768:29: error: 'pmc_set_writeprotect' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:769:35: error: 'TC3_IRQn' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:769:43: error: 'pmc_enable_periph_clk' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:770:16: error: 'TC1' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:5: error: 'TC_CMR_WAVE' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:19: error: 'TC_CMR_WAVSEL_UP' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:38: error: 'TC_CMR_TCCLKS_TIMER_CLOCK1' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:771:64: error: 'TC_Configure' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:772:18: error: 'TC_Start' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:774:15: error: 'g_APinDescription' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:776:3: error: 'portSet' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:777:3: error: 'portClear' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:778:3: error: 'timeValue' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:779:3: error: 'timeReset' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:786:14: error: 'VARIANT_MCK' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:790:14: error: 'VARIANT_MCK' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:799:18: error: 'TC_CCR_CLKEN' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:799:33: error: 'TC_CCR_SWTRG' was not declared in this scope
C:\Users\Turner\Documents\Arduino\libraries\Adafruit_NeoPixel\Adafruit_NeoPixel.cpp:809:17: error: 'TC_Stop' was not declared in this scope