Texas Instruments TMS320F2837 D Series Workshop Guide And Lab Manual

Lab 7: Control Peripherals
7 - 50 TMS320F2837xD Microcontroller Workshop - Control Peripherals
Lab 7: Control Peripherals
 Objective
The objective of this lab exercise is to become familiar with the programming and operation of the
control peripherals and their interrupts. ePWM1A will be setup to generate a 2 kHz, 25% duty
cycle symmetrical PWM waveform. The waveform will then be sampled with the on-chip analog-
to-digital converter and displayed using the graphing feature of Code Composer Studio. Next,
eCAP1 will be setup to detect the rising and falling edges of the waveform. This information will
be used to determine the width of the pulse and duty cycle of the waveform. The results of this
step will be viewed numerically in a memory window.
Lab 7: Control Peripherals
ADC
RESULT0
...
data
memory
CPU copies
result to
buffer during
ADC ISR
ePWM2
jumper
wire
Capture 1 Register
ADC-
INA0
TB Counter
Compare
Action Qualifier
ePWM1
eCAP1
Capture 2 Register
Capture 3 Register
Capture 4 Register
View ADC
buffer PWM
samples
Code Composer
Studio
ePWM2 triggering
ADC on period match
using SOCA trigger every
20 µs (50 kHz)
 Procedure
Open the Project
1. A project named Lab7 has been created for this lab exercise. Open the project by
clicking on Project  Import CCS Projects. The “Import CCS Eclipse Projects”
window will open then click Browse… next to the “Select search-directory” box. Navigate
to: C:\C28x\Labs\Lab7\cpu01 and click OK. Then click Finish to import the project.
All build options have been configured the same as the previous lab exercise. The files
used in this lab exercise are:

Texas Instruments TMS320F2837 D Series Specifications

General

Brand	Texas Instruments
Model	TMS320F2837 D Series
Category	Microcontrollers
Language	English