Tweak the PDB timer period.

2016-12-15 10:22:07 +00:00 · 2016-12-15 10:22:07 +00:00 · 2fad06093f
parent dca6dd35dc
commit 2fad06093f
1 changed files with 1 additions and 1 deletions
--- a/IOTeensy.cpp
+++ b/IOTeensy.cpp
@ -138,7 +138,7 @@ void CIO::startInt()
 #else
  // Setup PDB for ADC0 at 24 kHz
  SIM_SCGC6  |= SIM_SCGC6_PDB;                                        // Enable PDB clock
-  PDB0_MOD    = F_BUS / 24000;                                        // Timer period
+  PDB0_MOD    = (F_BUS / 24000) - 1;                                  // Timer period - 1
  PDB0_IDLY   = 0;                                                    // Interrupt delay
  PDB0_CH0C1  = PDB_CHnC1_TOS | PDB_CHnC1_EN;                         // Enable pre-trigger for ADC0
  PDB0_SC     = PDB_SC_TRGSEL(15) | PDB_SC_PDBEN |                    // SW trigger, enable interrupts, continuous mode