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Opened on 10/26/22 at 09:31:03

Closed on 10/26/22 at 09:36:01

#4746 closed defect (fixed)

Armv7-M SysTick clock driver uses off by one reload value

Reported by: Sebastian Huber Owned by: Sebastian Huber
Priority: normal Milestone: 6.1
Component: arch/arm Version: 4.11
Severity: normal Keywords:
Cc: Blocked By:
Blocking:

Description


Change History (1)

comment:1 Changed on 10/26/22 at 09:36:01 by Dariusz Sabala <dariusz.sabala@…>

Resolution: → fixed
Status: assigned → closed

In [changeset:"1eae6f24fec6c3ab00d8f5d0152d2a5b57ea4589/rtems" 1eae6f2/rtems]:

bsps/arm: fix Cortex-M7 systick reload value

  • see ARM DUI 0646C Arm Cortex-M7 Devices Generic User Guide "The RELOAD value is calculated according to its use. For example, to generate a multi-shot timer with a period of N processor clock cycles, use a RELOAD value of N-1. If the SysTick? interrupt is required every 100 clock pulses, set RELOAD to 99."
  • see routines used in CMSIS project for reference

Close #4746.

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