Pdb Driver Applications - Freescale Semiconductor DSP56800E User Manual

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PDB Driver Applications

There is onee sample applications demonstrating how PDB module can be used in a user

application. The supported DEMO boards for PDB sample application are MC56F8006DEMO.

{DSP56800E_Quick_Start Source}\..\sample_applications\MC56F8006DEMO\pdb_demo

This application demonstrates a Programable Delay Block with a ADC module in ping-pong

mode. The demo application is using the PWM module to generate one analog signal.

In FreeMASTER is shown actual value of PWM output, where is a triangle signal. The PDB

module is triggered by software when the PWM output reach minimum or maximum its value. In

second time graph is shown half value of the internal PDB counter (sawtooth signal) and two

sampled analog signal. On both analog inputs is same signal from the PWM module. Sampled

analog signals have different values, because both are sampled in different time - sample time

depend on values delayA and delayB.

There are 6 LED diodes on this board.

The led diode PWM0 indicate value of PWM output.

LED diode PWM5 indicates that the main loop is working correctly.

LED diode PWM4 indicates that the PWM module is reloading correctly.

LED diode PWM3 indicates that in the PDB module is delayA and delayB working correctly.

Targeting 56F8xxx Platform

FREESCALE SEMICONDUCTOR

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