Sparkfun: IR Receiver Breakout Board
Contents
Background Information
Model: TSOP85338
Sample Rate: 38kHz
VDD: 2.5V-5.5V
Sending a Signal
The TSOP85338 operates with a carrier frequency of 38kHz. That is, when the IR sensor is receiving an IR signal that is being modulated at 38kHz it outputs a logic 0. Using the BeagleBone to send a message to the TSOP85338 can be done using one of its PWM outputs. To perform testing of these attributes, ehrpwm1:0 can be used. By setting the duty_freq to 38000 and duty_percent to 50, it is possible to toggle an IR LED which if received by the sensor will output a logic 0. If the TSOP85338 is not receiving this modulated IR signal, it outputs a logic 1.
Reading Using Interrupts and GPIO
Testing and Results
Reading Using PRU
Resources
DataSheet & Schematic: TSOP85338 Page on Sparkfun.com
Consumer IR: Wikipedia page on CIR
