54 lines
1.2 KiB
Plaintext
54 lines
1.2 KiB
Plaintext
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// Arduino Duemilanove (168) on OS X 10.9
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// with either 115200 or 38400 bps
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// on Processing 2.0.3 (cu & tty): 24 ms avg, 35 ms max
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// on Processing 2.1b1 (cu & tty): 18 ms avg, 35 ms max
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import processing.serial.*;
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Serial serial;
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int start;
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byte out = '@';
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int last_send = 0;
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byte[] in = new byte[32768];
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long num_fail = 0;
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long num_recv = 0;
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int max_latency = 0;
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void setup() {
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println(serial.list());
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// change this accordingly
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serial = new Serial(this, serial.list()[0], 115200);
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start = millis();
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}
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void draw() {
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background(255);
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if (0 < serial.available()) {
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int recv = serial.readBytes(in);
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for (int i=0; i < recv; i++) {
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if (in[i] == out) {
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num_recv++;
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int now = millis();
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if (max_latency < now-last_send) {
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max_latency = now-last_send;
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}
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last_send = 0;
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}
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}
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}
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if (last_send != 0 && 1000 < millis()-last_send) {
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num_fail++;
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last_send = 0;
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println(num_fail+" bytes timed out");
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}
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if (last_send == 0) {
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if (out == 'Z') {
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out = '@';
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}
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serial.write(++out);
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last_send = millis();
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}
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fill(0);
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text(((millis()-start)/(float)num_recv+" ms avg"), 0, height/2);
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text(max_latency+" ms max", 0, height/2+20);
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}
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