Reduce the value of the LPTMR CMR by one.

2016-12-14 13:24:08 +00:00 · 2016-12-14 13:24:08 +00:00 · dca6dd35dc
parent 2747e2979d
commit dca6dd35dc
1 changed files with 1 additions and 1 deletions
--- a/IOTeensy.cpp
+++ b/IOTeensy.cpp
@ -131,7 +131,7 @@ void CIO::startInt()
  SIM_SCGC5  |= SIM_SCGC5_LPTIMER;                                    // Enable Low Power Timer Access
  LPTMR0_CSR  = 0;                                                    // Disable
  LPTMR0_PSR  = LPTMR_PSR_PBYP;                                       // Bypass prescaler/filter
-  LPTMR0_CMR  = EXTERNAL_OSC / 24000;
+  LPTMR0_CMR  = (EXTERNAL_OSC / 24000) - 1;                           // Frequency divided by CMR + 1
  LPTMR0_CSR  = LPTMR_CSR_TPS(2) |                                    // Pin: 0=CMP0, 1=xtal, 2=pin13
                LPTMR_CSR_TMS;                                        // Mode Select, 0=timer, 1=counter
  LPTMR0_CSR |= LPTMR_CSR_TEN;                                        // Enable