http://forums.leaflabs.com/topic.php?id=96 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:19:36 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=96#post-529 Sat, 10 Jul 2010 15:10:27 +0000 leaflabsandy 529@http://forums.leaflabs.com/ <p>I left this code for other board users to quickly check out all three serial ports on their Maple. It is a very crude test but gets the job done.<br /> I am extremely happy with all three ports running normal at 9600 8 N 1. The maximum<br /> of 153600, I found on my Maple is a baud rate I would never use due to extra hardware handshake I/O pins. </p> http://forums.leaflabs.com/topic.php?id=96#post-528 Sat, 10 Jul 2010 13:11:46 +0000 bnewbold 528@http://forums.leaflabs.com/ <p>Perhaps 330 Ohm is too much impedance for these higher baud rates? You could check with a scope and see how clean the waveform is. </p> http://forums.leaflabs.com/topic.php?id=96#post-526 Fri, 09 Jul 2010 17:17:03 +0000 leaflabsandy 526@http://forums.leaflabs.com/ <p>For other users:</p> <p>------<br /> code<br /> ------</p> <p>/*<br /> Author: LeaflabsAndy<br /> Date: 7/1/10<br /> Revision: 1.0b<br /> Platform: Win XP SP3<br /> Device: Maple Rev. 3 red<br /> IDE Rev.: 0.5.0</p> <p> Maple 3 Port Serial Comm. Turnaround Test<br /> Insert 3 330 ohm resistors (for current limit protection)<br /> into the following headers on the Maple for each serial port.</p> <p> USART2 D0-D1 (RX to TX)<br /> USART1 D7-D8 (TX to RX)<br /> USART3 D29-D30 Ext. HDR. (TX to RX) center 5 up either way</p> <p> This Maple Communication Turnaround Port Test sends out one char then checks the receive buffer<br /> on all three USARTS.<br /> If everything is Ok the blue LED stays on and flashes.<br /> On any char mismatch the program halts and the blue LED is off.<br /> All three resistors will have to be installed. Removing any turnaround resistor will halt the program.</p> <p> Standard baud rates:<br /> •110 •300 •600 •1200 •2400 •4800 •9600<br /> •14400 •19200 •28800 •38400 •56000<br /> •57600 •115200<br /> max baud on hardware uart is 225000? per okie but this test could only do 153600 max.<br /> Special baud rates:<br /> •128000 •153600 •230400<br /> •256000 •460800 •921600 </p> <p> Program status: OK - it works.<br /> */</p> <p>#define BLUE_LED 13<br /> #define BAUD 153600</p> <p>int toggle = 0;<br /> static int x = 0;<br /> static long loop1, loop2, loop3;<br /> static byte inByte1, inByte2, inByte3;</p> <p>void setup() {<br /> Serial1.begin(BAUD);<br /> Serial2.begin(BAUD);<br /> Serial3.begin(BAUD);</p> <p> //Serial1.flush(); &lt;----- does not work????<br /> //Serial2.flush(); &lt;----- does not work????<br /> //Serial3.flush(); &lt;----- does not work????</p> <p> /* Set up the LED to blink */<br /> pinMode(BLUE_LED, OUTPUT);<br /> }</p> <p>void abort(void){<br /> digitalWrite (BLUE_LED,LOW);<br /> while(1) {}<br /> } </p> <p>void serial1Test(void){<br /> Serial1.write(x);<br /> loop1 = 0;<br /> START1:<br /> if (Serial1.available()) {inByte1 = Serial1.read(); goto check_Data1;}<br /> loop1++;<br /> if (loop1 &gt; 5000) {abort();}<br /> goto START1;<br /> check_Data1:<br /> if (inByte1 != x) {abort(); }<br /> }</p> <p>void serial2Test(void){<br /> Serial2.write(x);<br /> loop2 = 0;<br /> START2:<br /> if (Serial2.available()) {inByte2 = Serial2.read(); goto check_Data2;}<br /> loop2++;<br /> if (loop2 &gt; 5000) {abort();}<br /> goto START2;<br /> check_Data2:<br /> if (inByte2 != x) {abort(); }<br /> }</p> <p>void serial3Test(void){<br /> Serial3.write(x);<br /> loop3 = 0;<br /> START3:<br /> if (Serial3.available()) {inByte3 = Serial3.read(); goto check_Data3;}<br /> loop3++;<br /> if (loop3 &gt; 5000) {abort();}<br /> goto START3;<br /> check_Data3:<br /> if (inByte3 != x) {abort(); }<br /> }</p> <p>void loop() {<br /> toggle ^= 1;<br /> digitalWrite(BLUE_LED, toggle);</p> <p>for(x = 0; x &lt; 256; x++){ //seed values<br /> serial1Test(); // Serial1 test<br /> serial2Test(); // Serial2 test<br /> serial3Test(); // Serial3 test<br /> } // end of for</p> <p>} //The end </p>