Details Of The Continuous/One-Shot Block - Texas Instruments Concerto F28M35 Series Technical Reference Manual

Table of Contents

Capture Mode Description

The continuous/one-shot block controls the start/stop and reset (zero) functions of the Mod4 counter via a

mono-shot type of action that can be triggered by the stop-value comparator and re-armed via software

Once armed, the eCAP module waits for 1-4 (defined by stop-value) capture events before freezing both

the Mod4 counter and contents of CAP1-4 registers (time-stamps).

Re-arming prepares the eCAP module for another capture sequence. Also re-arming clears (to zero) the

Mod4 counter and permits loading of CAP1-4 registers again, providing the CAPLDEN bit is set.

In continuous mode, the Mod4 counter continues to run (0->1->2->3->0, the one-shot action is ignored,

and capture values continue to be written to CAP1-4 in a circular buffer sequence.

ECCTL2[STOP_WRAP]

8.4.4 32-Bit Counter and Phase Control

This counter provides the time-base for event captures, and is clocked via the system clock.

A phase register is provided to achieve synchronization with other counters, via a hardware and software

forced sync. This is useful in APWM mode when a phase offset between modules is needed.

On any of the four event loads, an option to reset the 32-bit counter is given. This is useful for time

difference capture. The 32-bit counter value is captured first, then it is reset to 0 by any of the LD1-LD4

C28 Enhanced Capture (eCAP) Module

Figure 8-6. Details of the Continuous/One-shot Block

Stop value (2b)

control logic

ECCTL2[RE−ARM]

ECCTL2[CONT/ONESHT]

SPRUH22I – April 2012 – Revised November 2019

Submit Documentation Feedback

Chapters

Table of Contents