A special circuit pushes the current through the emitting diode up to 0.5A for the duration of a pulse of approximately 100µs.
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Usage Zynq7000
To use the module with the Zynq7000 together with https://flink-project.ch/, you need a Reflective Photoelectric Sensor subdevice within flink. Connect it in the following way:
| Microzed Board | Module |
|---|---|
| L14 | Trig |
| N16 | A0 |
| L15 | A1 |
| ADC7476 | Out |
The sensor output has to be digitized by a ADC. Our Microzed adapter board for our experimental system already has an AD7476 incorporated for this purpose.
There are two drivers available. One for Python when using a Linux operating system and one for Java in combination with deep.
Python Example
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import flink
tcrt1000 = flink.FlinkReflectiveSensor()
while True:
print("TCRT1000: value =", sense.getValue(0)) |
Java Example
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import java.io.PrintStream;
import org.deepjava.runtime.arm32.Task;
import org.deepjava.runtime.zynq7000.driver.TCRT1000;
import org.deepjava.runtime.zynq7000.driver.UART;
public class TCRT1000Demo extends Task {
static TCRT1000 sense;
public void action() {
for(int i = 0; i < 4; i++) {
System.out.print(sense.read(i));
System.out.print('\t');
}
System.out.println();
}
static {
UART uart = UART.getInstance(UART.pUART1);
uart.start(115200, (short)0, (short)8);
System.out = new PrintStream(uart.out);
System.err = System.out;
System.out.println("TCRT1000 demo");
// Initialize TCRT1000 driver for 4 sensors and start reading values
sense = TCRT1000.getInstance();
sense.init(4, 4, 3, 2, 1, 0); // initialize 4 sensors
sense.start();
// Create and install demo task
Task demoTask = new TCRT1000Demo();
demoTask.period = 1000;
Task.install(demoTask);
}
} |