Revision 0:a6494748f42e, committed 2014-06-29

Comitter:

emcu

Date:

Sun Jun 29 10:07:37 2014 +0000

Commit message:

NUCLEO-L152RE How to use USART1 and USART2 under Interrupt

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Jun 29 10:07:37 2014 +0000
@@ -0,0 +1,136 @@
+//
+// U2andU1_Inter
+//
+// From: www.emcu.it
+// Date: 29-06-2014
+// Tested on NUCLEO_L152RE
+// for more info see here: http://www.emcu.it/NUCLEOevaBoards/NUCLEOevaBoards.html#Tutorial
+//
+/*
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ 
+ 
+ ++++++++++++++++++++++ CONFIGURATIONS +++++++++++++++++++++++++++++++
+ 
+ USART2 it is used for debug (connected to the PC) using TeraTerm
+ USART1 it is used for show the way to use another USART
+ Both USART are not used under Interrupt
+ 
+ The USART parameters are:
+ Baud Rate: 115200 
+ Data: 8
+ Parity: NONE
+ Stop: 1
+ Flow Control: NONE
+  
+  
+ ++++++++++++++++++++++ How to use this example ++++++++++++++++++++++
+ 
+ For test this example connect with a jumper D2 (SERIAL1_RX) to D10 (SERIAL1_TX).
+ 
+ Press and release the Blue Button and you must see the green LED ON for 1 second. 
+ At the same time some message are displayed via USB Virtual COM on your PC.
+ 
+ Similar, if you press E on your Tera Term (PC) you must see the green LED ON for 1 second.
+ 
+ 
+ */
+
+#include "mbed.h"
+ 
+Serial pc(SERIAL_TX, SERIAL_RX);    // This is USART2 tx, rx
+                                    //      It is used for Debug via VirtualCOM 
+                                    //      I suggest to use Tera TERM on PC
+Serial Serial1(PB_6, PA_10);        // This is USART1 tx, rx
+DigitalOut myled(LED1);             // This LED is on NUCLEO-L152RE
+DigitalIn BlueButton(USER_BUTTON);  // This is Blue-Button and is on NUCLEO-L153RE
+
+#define Pressed 0
+#define NotPressed 1
+
+int Car='\0';
+int CarSerial1='\0';
+int n=0;
+
+void callback2() // USART2 used for Debug
+    {
+    // Note: you need to actually read from the serial to clear the RX interrupt
+    Car = pc.getc();
+    }
+ 
+void USART1_INT() // USART1
+    {
+    // Note: you need to actually read from the serial to clear the RX interrupt
+    CarSerial1 = Serial1.getc();
+    }
+
+
+int main() {
+    myled = 0;
+    
+    // SetUp the baud rate
+    pc.baud(115200);
+    Serial1.baud(115200);
+
+    Serial1.attach(&USART1_INT);
+    pc.attach(&callback2);
+    
+    pc.printf("\n\r\n\r START MAIN \n\r");
+    
+    while(1) 
+    {
+    
+    // Test the Blue Button
+    if (BlueButton == Pressed)
+        {
+        while(BlueButton == Pressed)
+            {
+            if (n == 0)
+                pc.printf("Please release the BLUE Button\n\r");
+            n++;
+            }
+        n = 0;
+        pc.printf("Send char. E to USART1\n\r");
+        Serial1.putc('E');      // Send char. E to USART1
+        }
+       
+    // Test the char. received from USART2 that is USB Virtual COM 
+    if (Car == 'E')
+        {
+            {
+            pc.printf("Send char. E (received from USB_VirtualCOM USART2) to USART1\n\r");
+            Serial1.putc('E');  // Send char. E to USART1
+            }
+        Car = '\0';
+        }
+    
+    // Test the char. received from USART1
+    if (CarSerial1 == 'E')
+        {
+            {
+            pc.printf("RX char. E from USART1\n\r");
+            myled = 1;
+            wait(1);
+            }
+        myled = 0;
+        CarSerial1 = '\0';
+        }        
+
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Jun 29 10:07:37 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/024bf7f99721
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