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Update to 48 kHz sample rate.

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This commit is contained in:
Jonathan Naylor 2016-12-19 15:27:52 +00:00
parent 2fad06093f
commit 37080d9901
24 changed files with 79 additions and 118 deletions
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8
IODue.cpp
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@ -133,11 +133,11 @@ void CIO::startInt()
TC_CMR_ACPA_CLEAR | TC_CMR_ACPC_CLEAR |
TC_CMR_BCPB_CLEAR | TC_CMR_BCPC_CLEAR;
#if defined(EXTERNAL_OSC)
t->TC_RC = EXTERNAL_OSC / 24000; // Counter resets on RC, so sets period in terms of the external clock
t->TC_RA = EXTERNAL_OSC / 48000; // Roughly square wave
t->TC_RC = EXTERNAL_OSC / 48000; // Counter resets on RC, so sets period in terms of the external clock
t->TC_RA = EXTERNAL_OSC / 96000; // Roughly square wave
#else
t->TC_RC = 1750; // Counter resets on RC, so sets period in terms of 42MHz internal clock
t->TC_RA = 880; // Roughly square wave
t->TC_RC = 875; // Counter resets on RC, so sets period in terms of 42MHz internal clock
t->TC_RA = 438; // Roughly square wave
#endif
t->TC_CMR = (t->TC_CMR & 0xFFF0FFFF) | TC_CMR_ACPA_CLEAR | TC_CMR_ACPC_SET; // Set clear and set from RA and RC compares
t->TC_CCR = TC_CCR_CLKEN | TC_CCR_SWTRG; // re-enable local clocking and switch to hardware trigger source.