StarterWare DMTimer

DMTimer

Introduction

DMTimer is a 32 bit timer and the module contains a free running upward counter with auto reload capability on overflow. The timer counter can be read and written in real-time (while counting). The timer module includes compare logic to allow an interrupt event on a programmable counter matching value.

Programming

• DMTimer can be configured in two modes of operation. They are

1. Timer Mode
2. Compare Mode

• To enable the DMTimer to operate in Timer mode, the following sequence has to be followed.
  • Configure the timer for One-shot or Auto-reload operation by calling the API DMTimerModeConfigure().
  • Load the count value for the timer by calling the API DMTimerCounterSet().
  • If Auto-reload operation is enabled then use the API DMTimerReloadSet() to load the reload value.
  • Enable the timer interrupts by using the API DMTimerIntEnable().
  • Start/Enable the timer by calling the API DMTimerEnable(). The timer will start counting.
  • Stop/Disable the timer by calling the API DMTimerDisable(). The timer will stop counting.

• To enable the DMTimer to operate in Compare mode, the following sequence has to be followed.
  • Load the compare value to the compare register by calling the API DMTimerCompareSet.
  • Configure the timer in one shot with compare enable mode or auto reload with compare enable mode by calling the DMTimerModeConfigure API.
  • Load the count value for the timer by calling the API DMTimerCounterSet().
  • If Auto-reload operation is enabled then use the API DMTimerReloadSet() to load the reload value.
  • Enable the timer interrupts by using the API DMTimerIntEnable().
  • Start/Enable the timer by calling the API DMTimerEnable(). The timer will start counting.
  • Stop/Disable the timer by calling the API DMTimerDisable().