Documentation

Introduction

Speedgoat offers a range of solutions for timing and synchronization for many different scenarios, such as synchronizing model execution time across several real-time target machines, and synchronization model execution with external signals.

Synchronization Between Two or More Real-Time Target Machines

The following can be used to ensure all real-time target machines have the same model execution time:

Synchronization with External Signals

A device or sensor with a clock can be used to provide the timing.

An external clock can be used to trigger the model. For example, an external PWM signal can be read by the PWM Capture Code Module running on a configurable I/O module. The signal can be used to trigger model execution using the Interrupt Code Module.

A real-time target machine can be triggered from an external source using the DMA interrupt of the IO106 analog I/O module.

Synchronization of Different Components of the Same Target Machine

For motor control, a configurable I/O module can be used to generate PWM commands using the PWM Generation Code Module. An analog input I/O module is then synchronized to the PWM signal to measure motor feedback. Model execution is synchronized to the PWM period to read all the collected analog samples.

For audio applications, the analog input can be synchronized with the analog output, to guarantee a fixed delay.

Time-Based Synchronization

For time-based synchronization, Speedgoat offers the IO821 IRIG timing module which can be used to generate an interrupt to trigger a Simulink model at very precise intervals. The timing source for the IO821 can be either GPS, any dedicated timing device, or the I/O module itself (OCXO), and it can be used to synchronize other real-time target machines with IO821 I/O modules installed.